Answer:
The programming language is not stated;
The program written in C++ is as follows (See Explanation Section for detailed explanation);
#include<iostream>
using namespace std;
int main()
{
int numdays;
cout<<"Number of days of mileage: ";
cin>>numdays;
int miles[numdays];
for(int i=0;i<numdays;i++)
{
cout<<"Miles traveled on day "<<i+1<<": ";
cin>>miles[i];
}
int total = 0;
for(int i=0;i<numdays;i++)
{
total+=miles[i];
}
cout<<"Total mileage traveled: "<<total;
return 0;
}
Explanation:
This line declares the number of days of mileage
int numdays;
This line prompts user for days of mileage
cout<<"Number of days of mileage: ";
This line accepts input from the traveler for days of mileage
cin>>numdays;
This line creates an array
int miles[numdays];
The italicized is an iteration that collects the user input for each day
for(int i=0;i<numdays;i++)
{
cout<<"Miles traveled on day "<<i+1<<": ";
cin>>miles[i];
}
This line initializes variable to 0
int total = 0;
The italicized is an iteration that adds up the mileage traveled by the traveler each day
for(int i=0;i<numdays;i++)
{
total+=miles[i];
}
This line prints the total miles traveled
cout<<"Total mileage traveled: "<<total;
Which Azure networking component is the core unit, from which administrators can have full control over IP address assignments, name resolution, security settings and routing rules
Answer:
The correct answer will be "Virtual networks".
Explanation:
This networking seems to be the major element of azure connectivity that further keep track of almost all of the essential administrative responsibilities. Its function involves complete ownership over all the appointments of Ip addresses as well as the settlement of names.This decides based on the criteria for transferring the information from one place to another other.Why is a DNS cache poisoning attack dangerous? Check all that apply. A. Errrr...it's not actually dangerous. B. It allows an attacker to redirect targets to malicious webservers. C. It allows an attacker to remotely controle your computer. D. It affects any clients querying the poisoned DNS server.
Answer:
(B) It allows an attacker to redirect targets to malicious webserver.
(D) It affects any clients querying the poisoned DNS server.
Explanation:
DNS cache poisoning is a serious type of attack that is designed to exploit the vulnerabilities inherent in a Domain Name Server (DNS) where a user is redirected from a real server to a fake one. It is also called DNS spoofing.
Normally, when your browser tries to visits a website through a given domain name, it goes through the DNS server. A DNS server maintains a list of domain names and their equivalent Internet Protocol addresses. This server (DNS) then responds to the request with one or more IP addresses for the browser to reach the website through the domain name.
The computer browser then get to the intended website through the IP address.
Now, if the DNS cache is poisoned, then it has a wrong entry for IP addresses. This might be via hacking or a physical access to the DNS server to modify the stored information on it. Therefore, rather than responding with the real IP address, the DNS replies with a wrong IP address which then redirects the user to an unreal website.
Although they might not be able to control your computer remotely as long as you are not trying to visit a web page via the poisoned information, there are other dangers attached to this type of attack.
Once the DNS server has been poisoned, any client trying to query the server will also be affected since there is no direct way of knowing if the information received from the server is actually correct.
nside of your organization that checks how often client machines access it. If a client machine hasn't accessed the server in three months, the server won't allow the client machine to access its resources anymore. What can you set to make sure that your client machines and the server times are in sync
Complete Question:
Let's say that you handle the IT systems administration for your company. There's a server inside of your organization that checks how often client machines access it. If a client machine hasn't accessed the server in three months, the server won't allow the client machine to access its resources anymore. What can you set to make sure that your client machines and the server times are in sync?
Answer:
Network Time Protocol (NTP).
Explanation:
As the IT systems administrator, you can set the network time protocol (NTP) to make sure that your client machines and the server times are in synchronization.
A network time protocol (NTP) can be defined as an internet standard protocol which is used by an IT system administrator to synchronize a computer's clock to a particular time reference over packet switched or local area network (LAN) and variable-latency data networks. NTP was developed at the University of Delaware by Professor David L. Mills.
Basically, the network time protocol uses the coordinated universal time (UTC) and a client-server model to measure the total round-trip delay for a computer process.
Complete the below method, isPalindrome(), that takes in a String and returns a boolean. The boolean should be true if the String is a palindrome, i.e., the String is the same if read forwards or in reverse. For example, "racecar" is a palindrome. The method should return false if the String is not a palindrome. Note: any single-letter word is considered a palindrome.
public class StringMethod {
public static boolean isPalindrome(String word) {
//TODO: Complete this method
}
}
Answer:
public static boolean isPalindrome(String word) {
//TODO: Complete this method
String reverse = "";
for (int i = (word.length()-1); i>=0; i--) {
if(word.charAt(i)!=' '){
reverse+=word.charAt(i);
}
}
String without_space = word.replaceAll(" ", "");
return reverse.equals(without_space);
}
Methods are collections of named code blocks, that are executed when called or evoked.
The isPalindrome method written in Java, where comments are used to explain each line is as follows
//This defines the method
public static boolean isPalindrome(String word) {
//This removes all the spaces in the word
String newStr = word.replaceAll(" ", "");
//This initializes an empty string
String rev = "";
//This iterates through the word, in reverse order
for (int i = (word.length()-1); i>=0; i--) {
//This gets all the characters in the string (without the space)
if(word.charAt(i)!=' '){
rev+=word.charAt(i);
}
}
//This returns true or false
return reverse.equals(newStr);
}
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When you sustain program implementation by staying true to the original design, it is termed A. Goals and objectives B. Program fidelity C. Program evaluation D. Program management
Answer:
Program fidelity
Explanation:
? Question
Which term describes a population's attitudes and beliefs?
demographics
infographics
psychographics
geographics
psychgraphics
geographics
Answer:
psychographics
Explanation:
The study of people according to their attitudes, aspirations and other psychological criteria
A function prototype can always be omitted when: A function is defined before it is first invoked. A function does not return a value. A function is invoked before it is first defined. A function takes no arguments.
Answer:
A function is defined before it is first invoked.
Explanation:
A function prototype is a term in computer programming that is used as the declaration of a function that specifies function's name, parameters and return type. However, unlike function itself, which specifies what it does, a function prototype specifies function's interface only and not what it does.
Hence, A function prototype can always be omitted when: a function is defined before it is first invoked.
Passing structured query language commands to a web application and getting the website to execute it is called SQL script:______.
A) Injection.
B) Processing.
C) Attacking.
D) Execution.
Answer:
(A) Injection
Explanation:
SQL injection is one of the most common web attacks used by attackers to steal data or compromise a web application (especially the database) by inserting or "injecting" SQL queries or commands through the input data from the web application.
In web applications, form inputs are used to make requests to the database either for validation or submission of data by executing queries in the database. If these queries are interfered with by passing query like commands into the form input fields rather than some regular alphanumeric characters, then we have an SQL injection.
When this happens;
i. the attackers can modify an SQL query to return additional results from the database
ii. the attackers can change a query to interfere with the application's regular logic flow.
iii. the attackers can extract sensitive information about the database such as its version and structure.
Hashing algorithms are used on evidence files to uphold the chain of custody in an investigation. Which of the following is NOT a hashing algorithm?
A. SHA-256
B. MD5
C. DAT-1
D. SHA-1
Answer:
C. DAT-1
Explanation:
Chain of custody is applied when examining digital evidence and checking for proof that no alterations have been made to the document. It ensures that the original piece of digital evidence which could be in text, image, video, or other electronic formats, is preserved and protected from alterations. Hashing algorithms which are mathematical computations that help to condense files are applied during this procedure.
Common hashing algorithms applied, include; the message digest 4, secure hashing algorithms 1, 2, 256, 224, 512, etc. The message digest 4 is used to evaluate why a particular piece of evidence was handled by an individual. This is further authenticated by examining the fingerprint.
What is a real-life example of a Microsoft Access Query?
Explanation:
Microsoft Access is an information management tool that helps you store information for reference, reporting, and analysis. Microsoft Access helps you analyze large amounts of information, and manage related data more efficiently than Microsoft Excel or other spreadsheet applications.
A real-life example of a Microsoft Access Query is a table that stores the names of new customers at a supermarket.
What is Microsoft Access?Microsoft Access is a database management software application designed and developed by Microsoft Inc., in order to avail its end users an ability to create, store and add data to a relational database.
In Microsoft Access, the options that are available on the File tab include the following:
Opening a database.
Selecting a template.
Creating a new database.
In conclusion, a database is an element in Microsoft Access which is an ideal data source and a query would always obtain, generate, or pick information from it.
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When Windows deletes the driver package and driver files, in what situation might it not delete driver files used by the device that is being uninstalled?
Answer:
when there is no junk
Explanation:
If you choose the checkbox next to “Delete the driver software from this device,” your computer will no longer contain the driver or any associated registry keys. Either method will prevent you from using the device until you reinstall the device driver.
What is situation deletes driver files used by the device?To connect and communicate with particular devices, a computer needs device drivers.
It may be taken out without any trouble. However, it also comes with the installers for your PC's drivers. You will need to go to the manufacturer's website to download them again if you accidentally delete them.
Therefore, No, unless your new driver is broken and corrupts data. Install the driver if it comes from a reliable source. It is not intended to. Having a backup system that keeps your data safe in case of issues is a good idea.
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C create a class called Plane, to implement the functionality of the Airline Reservation System. Write an application that uses the Plane class and test its functionality. Write a method called Check In() as part of the Plane class to handle the check in process Prompts the user to enter 1 to select First Class Seat (Choice: 1) Prompts the user to enter 2 to select Economy Seat (Choice: 2) Assume there are only 5-seats for each First Class and Economy When all the seats are taken, display no more seats available for you selection Otherwise it displays the seat that was selected. Repeat until seats are filled in both sections Selections can be made from each class at any time.
Answer:
Here is the C++ program:
#include <iostream> //for using input output functions
using namespace std; //to identify objects like cin cout
class Plane{ //class Plane
private: // declare private data members i.e. first_class and eco_class
int first_class; //variable for first class
int eco_class; //variable declared for economy class
public: // public access modifier
Plane(){ //constructor to initialize values of first_class and eco_class
first_class=0; //initialized to 0
eco_class=0;} //initialized to 0
int getFirst(){ // class method to get data member first_class
return first_class;} //returns the no of reserved first class seats
int getEco(){ // class method to get data member eco_class
return eco_class;} //returns the no of reserved eco class seats
void CheckIn(){ //method to handle the check in process
int choice; //choice between first and economy class
cout<<"\nEnter 1 to select First Class Seat: "<<endl; //prompts user to enter 1 to reserve first class seat
cout<<"\nEnter 2 to select Economy Class Seat: "<<endl; //prompts user to enter 2 to reserve economy class seat
cin>>choice; //reads the choice from user
switch(choice){ // switch statement is used to handle the check in process
case 1: //to handle the first class seat reservation
if(getFirst()<5){ //if the seat is available and the seat limit has not exceed 5
first_class++; //add 1 to the first_class seat to count that a seat is reserved
cout<<"You reserved First class seat! ";} //display the message about successful seat reservation in first class
cout<<"\nNumber of first class seats reserved: "<<getFirst()<<endl;} //displays the number of seats already reserved
else{ //if all first class seats are reserved then display the following message
cout<<"No more seats available for you selection!"<<endl;
if(getEco()>=5 && getFirst()>=5){ //if all seats from first class and economy class are reserved display the following message
cout<<"All seats are reserved!"<<endl;
exit(1);}} //program exits
break;
case 2: //to handle the economy seat reservation
if(getEco()<5){ //if the seat is available and the seat limit has not exceed 5
eco_class++; //add 1 to the eco_class seat to count that a seat is reserved
cout<<"You reserved Economy class seat! "; //display the message about successful seat reservation in economy class
cout<<"\nNumber of Economy class seats reserved: "<<getEco()<<endl;} //displays the number of seats already reserved
else{ //if all economy class seats are reserved then display the following message
cout<<"No more seats available for you selection!"<<endl;
if(getEco()>=5 && getFirst()>=5){ //if all seats from first class and economy class are reserved display the following message
cout<<"All seats are reserved!"<<endl;
exit(1);}} //program exits
break;
default: cout<<"Enter a valid choice"<<endl; } } }; //if user enters anything other that 1 or 2 for choice then this message is displayed
int main(){ //start of main() function body
int select; // choice from first or economy class
Plane plane; //create an object of Plane class
cout<<"**************************"<<endl;
cout<<"Airline Reservation System"<<endl; //display this welcome message
cout<<"**************************"<<endl;
while(true){ // while loop executes the check in procedure
plane.CheckIn();} } //class CheckIn method of Plane classs using plane object to start with the check in process
Explanation:
The program is elaborated in the comments with each statement of the above code. The program has a class Plane that has a method CheckIn to handle the check in process. The user is prompted to enter a choice i.e. enter 1 to select First Class Seat and enter 2 to select Economy Seat. A switch statement is used to handle this process. If user enters 1 then the case 1 of switch statement executes which reserves a seat for the user in first class. If user enters 2 then the case 2 of switch statement executes which reserves a seat for the user in economy class.There are only 5 seats for each First Class and Economy. So when the limit of the seats reservation exceeds 5 then the no more seats available for you selection is displayed. If all the seats are taken in both the first and economy class then it displays the message All seats are reserved. If the user enters anything other than 1 or 2 then display the message Enter a valid choice. Whenever the user reserves one of first or economy class seats the relevant seat is incremented to 1 in order to count the number of seats being reserved. The program and its output are attached.
The code below takes the list of country, country, and searches to see if it is in the dictionary gold which shows some countries who won gold during the Olympics. However, this code currently does not work. Correctly add try/except clause in the code so that it will correctly populate the list, country_gold, with either the number of golds won or the string "Did not get gold".
1
2 gold = {"US":46, "Fiji":1, "Great Britain":27, "Cuba":5, "Thailand":2, "China":26, "France":10}
3 country = ["Fiji", "Chile", "Mexico", "France", "Norway", "US"]
4 country_gold = []
5
6 for x in country:
7 country_gold.append(gold[x])
8 country_gold.append("Did not get gold")
Answer:
Modify your program by replacing
for x in country:
country_gold.append(gold[x])
country_gold.append("Did not get gold")
with
for x in country:
try:
country_gold.append(gold[x])
except:
country_gold.append("Did not get gold")
Explanation:
The addition of try/except clause in the program is to let the program manage error;
In this case, the program checks for a country in the list country; This is implemented using the following line
for x in country:
If the country exists, the statement in the try block is executed
try:
country_gold.append(gold[x]) ->This appends the country name to the country_gold list
Otherwise, the statement in the except clause is executed
except:
country_gold.append("Did not get gold") -> This appends "Did not get gold" to the country_gold list
To confirm what you've done, you may add the following line of code at the end of the program: print(country_gold)
When organizing your career portfolio, you should.
A. always assemble it by topic
B. highlight the skills and experiences most relevant to those
thinking of hiring you
C. highlight only your education and work experiences but not your
skills
D. always assemble it chronologically
Answer:
B
Explanation:
When organizing your career portfolio, you should highlight the skills and experiences most relevant to those thinking of hiring you. Thus, option B is correct.
A combination resume can be described as the resume format which was designed for highly-trained job seekers with previous work experience.
In a case whereby a chronological resume lists your work history in reverse order, starting with your current or most recent job and working backwards and many employers like this format because it presents your work history in a clear, easy-to-follow arrangement the type of resume will you choose to use is Combination resume.
It should be noted that it is been reffered to as combination” as a result of how it combines the most notable features of both the functional resume format and the chronological resume.
Therefore, When organizing your career portfolio, you should highlight the skills and experiences most relevant to those thinking of hiring you. Thus, option B is correct.
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Write a program that reads ten integers, and then display the number of even numbers and odd numbers. Assume that the input ends with 0. Here is the sample run of the program
Answer:
I am writing a JAVA program. Let me know if you want this program in some other programming language.
import java.util.Scanner; // class to take input from user
class EvenOddNum{ //class name
static void EvenOdd(int array[]) { //function that takes an array as input and displays number of even numbers and odd numbers
int even = 0; // counts even numbers
int odd = 0; //counts odd numbers
for(int i = 0 ; i < array.length-1 ; i++){ //loop through the array elements till the second last array element
if ((array[i] % 2) == 1) { // if the element of array is not completely divisible by 2 then this means its an odd number
System.out.println(array[i]+" = odd"); //display that element to be odd
odd++ ; } //adds 1 to the count of odd every time the program reads an odd number
else{ // if above IF condition evaluates to false then the number is an even number
System.out.println(array[i]+" = even"); //display that element to be odd
even++ ; } } //adds 1 to the count of odd every time the program reads an odd number
System.out.println( "Number of even numbers = " + even); //counts the total number of even integers in the array
System.out.println( "Number of odd numbers = " + odd); } //counts the total number of odd integers in the array
public static void main (String[] args){ //start of main function body
Scanner scan= new Scanner(System.in); //creates Scanner class object
int [] integers = new int[10]; //declares an array named integers that stores 10 integers
System.out.print("Enter numbers: "); //prompts user to enter the integers
for(int i = 0;i<integers.length;i++){ //loops to read the input integers
integers[i] = scan.nextInt(); } //scans and reads each integer value
EvenOdd(integers); } } //calls function EvenOdd to display number of even and odd numbers
Explanation:
The program has a method EvenOdd that takes an array of integers as its parameter. It has two counter variables even and odd. even counts the number of even input integers and odd counts the number of odd input integers. The for loop iterates through each element (integer) of the array except for the last one. The reason is that it is assumed that the input ends with 0 so the last element i.e. 0 is not counted. So the loop iterates to length-1 of the array. The number is odd or even is determined by this if condition: if ((array[i] % 2) == 1) A number is even if it is divisible by 2 otherwise its odd. If the element of array is not completely divisible by 2 i.e. the remainder of the division is not 0 then the number is odd. The modulo operator is used which returns the remainder of the division of number by 2. Each time when an odd or even number is determined, the array[i]+" = even" or array[i]+" = odd" is displayed on the output screen for each integer in the array. Here array[i] is the element of the array and even or odd depicts if that element is even or odd. The last two print statement display the total number of even and odd numbers in the array.
Draw the BST where the data value at each node is an integer and the values are entered in the following order 36,22,10,44,42,16,25,3,23,24 solution
Answer and Explanation:
A BST is the short form for Binary Search Tree. It is a special type of binary tree data structure in which nodes are arranged in a particular order such that;
i. the left subtree of a particular node should always contain nodes whose key values are less than that of the key value of the node itself.
ii. the right subtree of a particular node should always contain nodes whose key values are greater than that of the key value of the node itself.
iii. the right and left subtrees should also be a binary search tree.
For the given set of data:
36,22,10,44,42,16,25,3,23,24;
The equivalent binary search tree is attached to this response.
As shown in the attachment:
i. the first data value (36) is the root node value.
ii. the second value (22) is less than the root node value (36), therefore, 22 goes to the left of the root node.
iii. the third value is 10. This is less than 36 and then also less than 22, so 10 goes to the left of 22.
iv. the fourth value is 44. This is greater than the root node value (36), therefore, 44 goes to the right of the root node.
v. the fifth value is 42. This is greater than the root value (36) so it is going to be positioned somewhere at the right of the root node. But it is less than the value (44) of the direct right node of the root node. Therefore, 42 goes to the left of the direct right (44) of the root node.
vi. the sixth value is 16. This is less than the root node value (36). So it is going to be positioned somewhere at the left of the root node. It is also less than the value (22) of the direct left node of the root node. So it is going to be positioned somewhere at the left of the node with 22. But it is greater than the node with 10. Therefore, 16 is going to be to the right of the node with 10.
This trend continues until all data values have been rightly positioned.
PS: A binary tree is a data structure in which each node cannot have more than two nodes directly attached to it.
In Network Address and Port Translation (NAPT), which best describes the information used in an attempt to identify the local destination address?
Answer:
Hello your question lacks the required options here are the options
source IP and destination IPsource IP and destination portsource IP and source portsource port and destination IPsource port and destination portanswer : source IP and destination port
Explanation:
The information that is used in an attempt to identify the local destination address is the source IP and destination port
source IP is simply the internet protocol address of a device from which an IP packet is sent to another device while destination port are the ports found in a destination device that receives IP packets from source ports they are found in many internet applications
A security administrator is investigating a report that a user is receiving suspicious emails. The user's machine has an old functioning modem installed. Which of the following security concerns need to be identified and mitigated? (Select TWO).
a) Vishing
b) Whaling
c) Spear phishing
d) Pharming
e) War dialing
f) Hoaxing
Answer:
Spear Phishing and War Dialing
Explanation:
So let's tackle these one at a time.
Vishing is simply any type of message (i.e., email, text, phone call, etc.) that appears to be from a trusted source but is not.
Whaling is simply a spear phishing attack of a high-value target such as a CEO or someone with high-level access at a company.
Spear phishing is simply a targeted phishing attack, usually towards a specific person or group of people. (Phishing attack is simply a social attack to try and gain unauthorized access to a resource).
Pharming is an attack that attempts to redirect website traffic to a fake site.
War dialing is a technique to automatically scan a list of numbers in an area in attempt to search for exposed modems, computers, board systems, or fax machines, in order to breach the network.
Hoaxing is simply a social attack that describes a serious threat in attempts to retrieve unauthorized access or money from a victim. (Think microsoft tech support scams)
Now that we have defined these things, let's identify the possible threats that need to be reported.
(a) Vishing? The sec admin report doesn't mention the source of the message so we cannot associate this one
(b) Whaling? The sec admin report says a user, implying someone not high up in the company, but doesn't say it's not someone high up. This is possible.
(c) Spear phishing? The sec admin report says a user, implying that only this user is being targeted so this is definitely valid.
(d) Pharming? The sec admin report says nothing about site redirection.
(e) War dialing? The sec admin report doesn't say anything about unauthorized scanning; however, it mentions the user has an old functioning modem, so this is possible.
(f) Hoaxing? The sec admin report doesn't mention a pop up in the email or the content of the email so we are uncertain.
Thus with these considerations, the two threats that are identified and need mitigation are Spear phishing and War Dialing/Whaling. Note that we aren't positive of the war dialing or whaling, but a case could be made for either; however, given the modem information, the question seems to indicate war dialing.
What is displayed in the alert dialog box after the following code is executed? var scores = [70, 20, 35, 15]; scores[scores.length] = 40; alert("The scores array: " + scores);
Answer:
The scores array: 70,20,35,15,40
Explanation:
I will explain the code line by line:
var scores = [70, 20, 35, 15];
The above statement declares and assigns values to an array named scores
scores[scores.length] = 40;
The above statement uses length to set the length of the scores array. It sets the last element of the scores array to 40. So this means 40 is set as the last element of scores.
scores.length returns the length of the scores array i.e. 4 as there are 4 elements in scores array 70,20,35,15
So the statement becomes:
scores[4] = 40;
This assigns value 40 to the 4th index of the scores array. Do not confuse 4th index with 4th element of the array because array element location starts from 0. So scores[4] does not mean 4th element but scores[4] means 4th index position of scores array. This makes 5th element of scores. So set the element 40 as 5th element at 4th index of scores.
alert("The scores array: " + scores);
This displays an alert box with the following message:
The scores array: 70,20,35,15,40
Which are true of the Transmission Control Protocol (TCP)? Multiple answers: You can select more than one option A it supports full duplex communication B it has graceful connection shutdown C its connections are logical D its data is sent as a discrete messages E it is an end-to-end protocol
Answer:
A, B, C, D and E
Explanation:
Transmission Control protocol (TCP) is a protocol that describes how connections are made and maintained between devices in a network which will help applications in these devices communicate and transmit data.
The following are some of the features of TCP:
i. It supports full duplex communication: In other words, TCP allows for concurrent transmission of data in both directions.
ii. it has a graceful connection shutdown: TCP allows for graceful termination and closing of connection. This means that when there is no more data to be sent by any of the communicating devices, rather than just close connection from its end, it first informs the other device about its completion and asks if it's safe to close the connection. From there, if the other device then says it doesn't have any data to send either, they then reach a consensus to close the connection at their respective ends.
iii. Its connections are logical: TCP makes use of the reliability and flow control mechanisms which require that it initialize and maintain some status information for each stream of data. This status information containing sockets, sequence numbers and window sizes is called a logical connection.
iv. Data is sent as discrete messages: Like other discrete messages, the IP treats the data in TCP as discrete messages by placing them into the IP datagram and transmitting to the target host.
v. It is an end-to-end protocol: TCP governs the way data is transmitted between two devices at their respective ends to ensure reliable delivery. In other words, it is responsible for the transmission of data from a source to one or more destinations. It sits on the operating system of the source and also on the operating system(s) of the destination(s).
Suppose that we want to multiply 500 matrices and we use the optimal parenthesization computed by the MATRIX-CHAIN-ORDER function discussed in class. After finding the optimal parenthesization, how many pairs of round brackets ( ) are printed by the procedure PRINT-OPTIMAL-PARENS(s, 1, 500)?
a. 249
b. 501
c. 251
d. 250
e. 499
f. 500
Answer:
síganme en las claves de ustedes pronto. Seré un buen día. He seguido un poco sobre el Is. He seguido un poco sobre el Is. He seguido un poco sobre el.
is (c)251? correct since i'm not really sure
Write a program segment that simulates flipping a coin 25 times by generating and displaying 25 random integers, each of which is either 1 or 2
Answer:
//import the Random class
import java.util.Random;
//Begin class definition
public class CoinFlipper {
//The main method
public static void main(String []args){
//Create an object of the Random class
Random ran = new Random();
System.out.println("Result");
//Use the object and the number of times for simulation
//to call the flipCoin method
flipCoin(ran, 25);
} //End of main method
//Method to flip coin
public static void flipCoin(Random ran, int nooftimes){
//Create a loop to run as many times as specified in variable nooftimes
for(int i=1; i<=nooftimes; i++)
System.out.println(ran.nextInt(2) + 1);
}
} //End of class definition
====================================================
Sample Output:
Result
1
1
1
2
1
2
2
1
2
1
1
2
1
2
1
1
1
2
1
1
1
2
2
1
2
========================================================
Explanation:
The above code has been written in Java. It contains comments explaining every part of the code. Please go through the comments.
The sample output from the execution of the code is also given above.
The code is re-written as follows without comments.
import java.util.Random;
public class CoinFlipper {
public static void main(String []args){
Random ran = new Random();
System.out.println("Result");
flipCoin(ran, 25);
}
public static void flipCoin(Random ran, int nooftimes){
for(int i=1; i<=nooftimes; i++)
System.out.println(ran.nextInt(2) + 1);
}
}
The new_directory function
Answer:The new directory method creates a new directory within the current working directory.
Explanation:The new directory function and returns the list of the files within that directory.The new directory function allow to with the built in function MK dir().
To the new directory function create a current working directory.
import OS
OS.MKdir()
The code creates the directory projects in the current working directory to specify the full path.
Some network applications defer configuration until a service is needed. For example, a computer can wait until a user attempts to print a document before the software searches for available printers.
What is the chief advantage of deferred configuration?
Answer:
The drivers wont be loaded and the deamons will not be running in the background unnecessarily, that makes the processes to run more faster
Explanation:
The chief advantage of deferred configuration or the advantage when some network applications defer configuration until a service is needed is that the drivers won't be loaded and the deamons will not be running in the background unnecessarily or when idle, that makes the processes to run more faster.
Network configuration is the activity which involves setting up a network's controls, flow and operation to assist the network communication of an organization or network owner.
Imagine you have a 10-character string stored in the variable myString. You want to pull out the first five characters. Which of the following lines of code would successfully generate a slice of the 10-character string holding only the first five characters?
a. myString[5]
b. myString[:-5]
c. myString[0:6]
d. myString-15:-5]
e. myString[0:10:2]
Answer:
b. myString[:-5]
d. myString[-15:-5]
Explanation:
I believe you have a typo in d. It must be d. myString[-15:-5]
Slicing can be done:
myString[starting_index, stopping_index, step] (step is optional). If you do not specify the starting index, it will start from the 0 as in b. If you write a range that is not in the range, as in d, Python will replace it with either 0 or length of the string (In this case, it is replaced with 0 because the starting index must be smaller than stopping index)
a. myString[5] → This will give you the sixth character
b. myString[:-5] → This will give you the first five characters
c. myString[0:6] → This will give you the first six characters
d. myString-15:-5] → This will give you the first five characters
e. myString[0:10:2] → This will give you the first, third, fifth, seventh, and ninth characters
Which statement is false?Structures are derived data types.Each structure definition must end with a semicolon.A structure can contain an instance of itself.Structures may not be compared using operators == and !=.
Answer:
A structure can contain an instance of itself
Explanation:
The statement which is known to be false out of the option given is that a structure may comprise or contain an instance of itself. Because to my knowledge, variables of diverse type are always most likely to attributed and contain by a structure.
It is worthy of note that object that aren't similar are utilize in constructing a structure. Another true statement about structure is that a semicolon usually end it's explanation.
Which HTML tag is used to add a paragraph to a web page?
Answer:
the HTML tag for the paragraph is <p>.
Explanation:
To insert the paragraph in the website, use the <p> tag to start the paragraph and to end the paragraph, use the closing paragraph tag that is </p>.
The paragraph tag is used inside the body tag. for example,
<html>
<head></head>
<body>
<p>this is a paragraph
</p>
</body>
</html>
CHALLENGE ACTIVITY 2.1.3: Multiplying the current value of a variable. Write a statement that assigns cell_count with cell_count multiplied by 10. * performs multiplication. If the input is 10, the output should be: 100
Answer:
cell_count = int(input("Enter the value: "))
cell_count *= 10
print(cell_count)
Explanation:
Ask the user to enter a value and set it to the cell_count variable
Multiply the cell_count by 10 and assign it to the cell_count (It can also be written as cell_count = cell_count * 10)
Print the cell_count
Description:
Create a program that converts the number of miles that you walked on a hike to the number of feet that you walked.
Console:
Hike Calculator
How many miles did you walk?: 4.5
You walked 23760 feet.
Continue? (y/n): y
How many miles did you walk?: 2.5
You walked 13200 feet.
Continue? (y/n): n
Bye!
Specifications:
The program should accept a float value for the number of miles.
Store the code that gets user input and displays output in the main function.
There are 5280 feet in a mile.
Store the code that converts miles to feet in a separate function. This function should return an int value for the number of feet.
Assume that the user will enter a valid number of miles.
Answer:
The programming language is not stated (I'll answer using C++)
#include <iostream>
using namespace std;
int convert(float miles)
{
return miles * 5280;
}
int main() {
cout<<"Console:"<<endl;
cout<<"Hike Calculator"<<endl;
float miles;
char response;
cout<<"How many miles did you walk?. ";
cin>>miles;
cout<<"You walked "<<convert(miles)<<" feet"<<endl;
cout<<"Continue? (y/n): ";
cin>>response;
while(response == 'y')
{
cout<<"How many miles did you walk?. ";
cin>>miles;
cout<<"You walked "<<convert(miles)<<" feet"<<endl;
cout<<"Continue? (y/n): ";
cin>>response;
}
cout<<"Bye!";
return 0;
}
Explanation:
Here, I'll explain some difficult lines (one after the other)
The italicized represents the function that returns the number of feet
int convert(float miles)
{
return miles * 5280;
}
The main method starts here
int main() {
The next two lines gives an info about the program
cout<<"Console:"<<endl;
cout<<"Hike Calculator"<<endl;
float miles;
char response;
This line prompts user for number of miles
cout<<"How many miles did you walk?. ";
cin>>miles;
This line calls the function that converts miles to feet and prints the feet equivalent of miles
cout<<"You walked "<<convert(miles)<<" feet"<<endl;
This line prompts user for another conversion
cout<<"Continue? (y/n): ";
cin>>response;
This is an iteration that repeats its execution as long as user continue input y as response
while(response == 'y')
{
cout<<"How many miles did you walk?. ";
cin>>miles;
cout<<"You walked "<<convert(miles)<<" feet"<<endl;
cout<<"Continue? (y/n): ";
cin>>response;
}
cout<<"Bye!";
What is displayed by the alert dialog box after the following code executes? var name = "Donny,Duck"; var index = name.indexOf(","); var lastName = name.substr(index + 1, name.length - 1);; alert("Last name: " + lastName);
Answer:
Last name: Duck
Explanation:
explanation is provided in the attached document.