Answer:
1 or 2
Explanation:
rand.nextInt(2) generats a number between 0 and 2 ( not including 2). randomInt = randomInt + 1 adds 1 to that number.
What single awk command can be used to display all the login names and their associated numerical user IDs
Answer:
Used the command syntax; awk -F":" '{ print "username: " $<number location> "\t\tuid:" $<number location> }' <target folder>
Explanation:
Linux operating system is a fast open-source computer platform for programmers and network administrators. Its system is arranged in a hierarchical tree structure with the root represented as "/" (for absolute path).
The passwd is a folder in the Linux OS that holds the login details of all users in the system network. The 'awk' is one of the commands used to get information from a file in a folder. It prints out the result by specifying the location of the values (like the username and user id) as a variable (with prefix '$') and then the target folder.
Professor Gig A. Byte needs to store text made up of the characters A with frequency 6, B with frequency 2, C with frequency 3, D with frequency 2, and E with frequency 8. Professor Byte suggests using the variable length codes:
Character Code
A 1
B 00
C 01
D 10
E 0
The professor argues that these codes store the text in less space than that used by an optimal Huffman code. Is the professor correct?
Answer:
This is not true
Explanation:
The optimal Huffman code is used to encrypt and compress text files. It uses fixed-length code or variable-length code for encryption and compression of data.
The professor's character code is similar to Huffman's variable-length coding which uses variable length od binary digits to represent the word strings. The file size of the text file above is;
= 6 x 1 + 2 x 2 + 3 x 2 + 2 x 2 + 8 x 1 = 28 bits
This would be the same for both cases.
The encrypt would be the problem as the encoded and decoding of the characters B and E may cause an error.
Documenting findings, actions, and outcomes of network troubleshooting calls is an essential part of the troubleshooting process. List the reasons why documentation is critical, and discuss the form that this documentation could take (e.g. blogs, wikis, professional document management software, etc). Include a detailed description of what information would need to be saved.
Answer:
The main purpose of documentation is for future reference on the cost, materials, procedures, and techniques used in a task. It can be in form of a video log, report, digital text document or software, etc.
Explanation:
Documentation is an important practice of taking notes of events during a process. It could in the process of creating or discovering new ideas or repair or management of existing processes. It holds the time, cost, technique, event name, measures-taken, etc, that would totally describe the event.
Multiple Choice
Which method adds an element at the beginning of a deque?
appendleft
O insertleft
O popleft
addleft
Answer: appendleft
Explanation: Edge 2021
The method that adds an element for the information at the beginning of a deque is append left. Thus option (A) is correct.
What is an information?An information refers to something that has the power to inform. At the most fundamental level information pertains to the interpretation of that which may be sensed.
The digital signals and other data use discrete signs or alogrithms to convey information, other phenomena and artifacts such as analog signals, poems, pictures, music or other sounds, and the electrical currents convey information in a more continuous form.
Information is not knowledge itself, but its interpretation is important. An Information can be in a raw form or in an structured form as data. The information available through a collection of data may be derived by analysis by expert analysts in their domain.
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12. The best method of protecting the residential user with an Internet connection from intruders out on the Internet is to use
Answer:
Updated OS software patches
Explanation:
Firstly we need to know that patches are those software updates as well as operating system updates that addresses the vulnerabilities In a program or a products security. Software operators may decide to roll out new updates which have the power to fix performance bugs in a program as well as providing more enhanced methods of security.
Which item is essential to know before sketching a navigation menu flowchart?
template specifics, such as horizontal or vertical menu layout
whether or not the site will implement a search feature
all of the pages in the site and the content each page will contain
who will be using the site and the design theme selected for them
Answer:
A, template specifics, such as horizontal or vertical menu layout
Explanation:
Answer:
D. who will be using the site and the design theme selected for them
Explanation:
I am doing the exam right now.
What are stored procedures? What kind of attack do stored procedures protect from? Identify two reasons why stored procedures are a good mitigation against the specific attack. g
Answer:
Stored procedures or procedures are subroutines or subprograms in SQL written by the user to accomplish a certain task. it helps to mitigate SQL injection by using markers as placeholders for data input and it streams the query statement and data separately in the database.
Explanation:
The stored procedure used in SQL is a user-defined function. Unlike built-in functions like pi(), they must be called to use them.
SQL injection in query statements is written by hackers to bypass conditions, especially when trying to gain access to other user accounts. Stored procedures use markers or placeholders to prevent this.
Suppose that you have the following declaration:
stack Type stack(50); double num; and the input is
25 64-3 6.25 36-4.5 86 14 -129
Write a C++ code that processes this input as follows: If the number is non-negative, it pushes the square root of the number onto the stack; otherwise it pushes the square of the number onto the stack. After processing these numbers write a C++ code that outputs the elements of the stack.
Answer:
Explanation:
The code is written in C++:
#include <iostream>
#include <stack>
#include <math.h>
#include <iomanip>
using namespace std;
/*
* Supporting method to print contents of a stack.
*/
void print(stack<double> &s)
{
if(s.empty())
{
cout << endl;
return;
}
double x= s.top();
s.pop();
print(s);
s.push(x);
cout << x << " ";
}
int main(){
// Declaration of the stack variable
stack<double> stack;
//rray with input values
double inputs[] = {25,64,-3,6.25,36,-4.5,86,14,-12,9};
/*
* For each element in the input, if it is positive push the square root into stack
* otherwise push the square into the stack
*/
for(int i=0;i<10;i++){
if(inputs[i]>=0){
stack.push(sqrt(inputs[i]));
}else{
stack.push(pow(inputs[i],2));
}
}
//Print thye content of the stack
print(stack);
}
OUTPUT:
5 8 9 2.5 6 20.25 9.27362 3.74166 144 3
-------------------------------------------------------------------------
Process exited after 0.01643 seconds with return value 0
Press any key to continue . . . -
WILL MARK BRAINILY!!
Muriel's program is supposed to show flashing lights to test the user's vision, but the lights don't flash for the right
amount of time. What should Muriel do?
O assess the program
O edit the program
O debug the program
O renew the program
Answer: He/she should debug the program
Explanation: If it's not right, it's edit or renew the program.
Answer:
he should edit the program
What are the advantages and disadvantages of using steganography versus symmetric or asymmetric encryption
Explanation:
Steganography is a technique used in securing or hiding sensitive information by encrypting the information in a non-hidden file like a JPEG format. A major advantage of this method is that it reduces the risk of attack or break-in since the data is enclosed in a non-secure file; thereby reducing threats of any hack. One main disadvantage of this method is that the hidden message may become difficult to recover if the source file (non-secure file) used, is edited or deleted.
In symmetric or asymmetric encryption they both employ cryptographic encryption method. While symmetric encryption uses one key to encrypt and decrypt data, asymmetric encryption uses two keys (one for encryption, the other for decryption) of the data. A major advantage of using these methods is that they provide more security. Although while symmetric encryption is faster, asymmetric encryption is slower (eg using separate keys to gain access), a disadvantage.
Advantage:
Because the content is contained throughout a non-secure file, the above strategy decreases the chance of an assault on classified info.Disadvantage:
This approach has the disadvantage that concealed information might be able to retrieve if somehow the documents have been changed or deleted as of a non-secure file.Once again to encrypt as well as decode information, symmetric encryption employs a unique key, but asymmetric encryption utilizes two different keys, something for encryption as well as someone else for decryption.
Advantage:
One such approach is superior to steganography throughout the level of protection.Disadvantage:
Because distinct keys have been needed to get access, such techniques of asymmetric encryption are considerably slower.Thus the approach above is correct.
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Write an LC-3 assembly language program to read in a two-digit decimal number whose digits add up to less than 10 and display the sum of those digits in the next line.
Sample execution (user input underlined) : Please enter a two-digit decimal number > 27. The sum of the digits = 9
Answer:
Explanation:
.MODEL SMALL
.STACK 100H
.DATA
STR1 DB 0AH,0DH, 'THE SUM OF TWO DIGITS PRENT IN THE GIVEN NUMBER'
FNUM DB ?
STR2 DB ' AND '
SNUM DB ?
STR3 DB ' IS '
ANS DB ?
STR4 DB ' $'
.CODE
MAIN PROC
MOV AX, "at" DATA PLEASE NOTE: your "at" need to be in symbol
MOV DS,AX It is because this text editor who allow the sub-
mission of this answer if i use the symbol format
MOV AH,2 that is why put it in bold and parenthesis
MOV DL,3FH
INT 21H
MOV AH,1
INT 21H
MOV BL,AL
MOV FNUM,AL
INT 21H
MOV SNUM,AL
ADD BL,AL
SUB BL,30H
MOV ANS,BL
MOV AH,9
LEA DX,STR1
INT 21H
MOV AH,4CH
INT 21H
MAIN ENDP
END MAIN
In C 11, the ________ tells the compiler to determine the variable's data type from the initialization value.
Answer:
auto key word
Explanation:
the auto keyword in c++11 can be regarded as one of the features of
“Type Inference” . It should be noted that in In C ++11, the auto key word tells the compiler to determine the variable's data type from the initialization value.
How might use of computer and knowledge of technology system affect personal and professional success
Answer:
social media
Explanation:
________________ are piece of programs or scripts that allow hackers to take control over any system.
Answer:
Exploits
Explanation:
Exploits can be explained to be a piece of programmed softwares or scripts that can give hackers the opportunity to take control over any system and exploit this system's vulnerabilities. The vulnerability scanners that hackers use includes, Nessus, Nexpose e.tc.
They use these scanners above to search for vulnerabilities.
If you wanted to make the system sequentially consistent, what are the key constrains you need to impose
Answer:
The call of instructions and data must be sequential, there can be no reordering of instructions but to allow reordering, a fence must be created.
Explanation:
Sequential consistent memory model is able to use instructions when or before processing is done and after processing, so long as the instruction order is sequential.
This is similar to uploading a video on you-tube, the site immediately creates a page for the video even before the video is fully uploaded. Sent tweeter messages are seen by different people at different times, but the messages appear to be arranged sequentially.
hello hello . please help me
Answer:
#include <iostream>
using namespace std;
int main() {
int num, check=0;
for(int num = 1; num<=100;num++){
for(int i = 2; i <= num/2; i++) {
if(num % i == 0) {
check=1;
break; } }
if (check==0) { cout <<num<<" "; }
check = 0;
}
return 0;
}
Explanation:
This line declares num as integer which represents digits 1 to 100.
A check variable is declared as integer and initialized to 0
int num, m=0, check=0;
This for loop iterates from 1 to 100
for(int num = 1; num<=100;num++){
This iterates from 2 to half of current digit
for(int i = 2; i <= num/2; i++) {
This checks for possible divisors
if(num % i == 0) {
If found, the check variable is updated to 1
check=1;
And the loop is terminated
break; } }
The following if statement prints the prime numbers
if (check==0) { cout <<num<<" "; }
check = 0;
}
write the code that writes access granted if the correct password, swordfish is entered and access denied! otherwise
In python 3.8:
if input("Enter password: ") == "swordfish":
print("access granted")
else:
print("access denied!")
What is the purpose of the Error Alert feature?
Answer:
When you add data validation to a cell, the Error Alert feature is automatically turned on. It blocks the users from entering invalid data in the cell.
Explanation:
There ya go.. -_-
Answer:
A) To alert the user to data entry mistakes
Explanation:
turns on her laptop and gets the error message "OS NOT FOUND." She checks the hard disk for damage or loose cable, but that is not the case. What could be a possible cause?
Write your own accessor and mutator method for the Rectangle class instance variables. You should create the following methods: getHeight setHeight getWidth setWidth getArea getPerimeter toString- The output of a rectangle with width 10 and height 4 method should be:
Answer:
Public int getHeight(){
return height;
}
public int getWidht(){
return widht;
}
public int setHeight(int change){
height = change;
}
public int setWidht(int change){
widht = change;
}
public int getPerimeter(){
int perimeter = 2 ( getWidht() + getHeight ());
return perimeter;
If the width is 10 and height 4, the perimeter should be 28.
Explanation:
An accessor in Java is a method that is used to get the value of an object variable. The program above has three accessor methods, getHeight, getWidht and getPerimeter.
Mutators are methods that is used to change of mutate the value of object variables. They are denoted or identified by the set prefix in their names. From the class code, the mutator are setHeight and setWidht.
One vulnerability that makes computers susceptible to walmare is:
A. A using antimalware software
B. Using password software
C. Using old versions of software
D. Using encryption on sensitive files
Define a toString prototype method that returns the cat's name, gender, and age separated by semicolons.
Answer:
Following are the program to this question:
import java.util.*;//import package for user input
public class Main//defining main class
{
public static String Cat (String name, String gender, int age)//defining string method Cat that accept parameter value
{
return name + ';' + gender + ';' + age;//return parameter value
}
public static void main(String[] args) //defining main method
{
String name,gender;//defining String variable
int age;//defining integer variable
System.out.println("Enter name, gender and age: ");//print message
Scanner obx=new Scanner(System.in);//creating Scanner class object for user input
name=obx.next();//input name value
gender=obx.next();//input gender value
age=obx.nextInt();// input age value
System.out.println(Cat(name,gender,age));//print return method value
}
}
Output:
Enter name, gender and age:
dani
Female
12
dani;Female;12
Explanation:
In the above-given code, a string method Cat is declared, that accepts three variable "name, gender, and age", inside the method return keyword is used that returns the parameter values.
In the main method, the above parameter variable is declared, which is used to input value from the user-end, and used the print method to print its return value.
Assuming int numbers[SIZE]; is initialized somehow, write a function counter() that you can send the array to, plus an extra integer, and the function will return the number of times that value is found in the array. For example, if the array of SIZE 7 contains {1,2,3,2,3,3,3}then the call
x=counter(numbers,SIZE,3); will put 4 into x.
Answer:
Explanation:
The following function is written in Java and takes in three parameters the array, its size, and the chosenNumber that will be counted. The function then creates an instance variable called Counter and loops through the given array looking for the chosenNumber. Every time that the number is found in the array it adds 1 to the counter. Once the loop is done it returns the total value of the counter variable.
public static int counter(int[] numbers, int Size, int chosenNumber) {
int counter = 0;
for (int x = 0; x < Size; x++) {
if(numbers[x] == chosenNumber) {
counter++;
}
}
return counter;
}
In dreamweaver name two attributes
Answer:
Explanation:
add an id and class
Write a program that gives simple math quizzes. The program should display two random numbers that are to be added, such as:
Project 5-11 output
The program should allow the student to enter the answer. If the answer is correct, a message of congratulations should be displayed. If the answer is incorrect, a message showing the correct answer should be displayed.
Answer:
6
Explanation:
the answer would have to be 6
What are url addresses for visiting websites? And what are the different parts of a URL? Answer it in a 1-2 paragraph
Answer:
Please read explanation
Explanation:
URL is the short form for "Uniform Resource Locator". A uniform resource locator tells the location of a website to the browser.
Parts of URL:
There are three main parts of URL
ProtocolDomain nameExtensionProtocol defines the type of protocol used for communicating with the website while the domain name is the name assigned to the IP address and the mapping is stored in domain name server and extension tells the type of website i.e.
.com means commercial
.org means non-profitable organization
.edu means educational website
An additional element is path which change with the website navigation.
For things like school, you should have a more serious:
Answer:
who and what do you mean
Explanation:
active cell is indentifed by its thick border true or false
Answer: It's identifed by its thick border so its true
Insert the missing code in the following code fragment. This fragment is intended to implement a method to set the value stored in an instance variable.
Public class Employee
{
Private String empID;
Private boolean hourly;
) . .
_______
{
Hourly = isHourly;
}
}
A) public void setHourly(String isHourly)
B) public void getHourly()
C) public boolean getHourly()
D) public boolean setHourly(boolean isHourly)
Answer:
A)
Explanation:
In this code example the missing piece of code would be...
public void setHourly(String isHourly)
This piece of code is creating a function called setHourly which takes in one String variable as it's parameter. Based on the rest of the code, the function takes that parameter variable and places it into an instance variable called Hourly which can be used when the function is called.
Write a method that reverses the sequence of elements in an array. For example, if you call the method with the array 1, 4, 9, 16, 9, 7, 4, 9, 11, then the array is changed to 11, 9, 4, 7, 9, 16, 9, 4, 1. Use one or more loops in your solution (do not use the Array Reverse method).
Answer:
The method written in Java is as follows:
public static void ArrayReverse(int myarray[]){
for(int index = myarray.length-1; index>=0;index--)
System.out.print(myarray[index]+" ");
}
Explanation:
This line defines the method
public static void ArrayReverse(int myarray[]){
This line iterates through the array from highest to least index
for(int index = myarray.length-1; index>=0;index--)
This prints the array elements in reverse
System.out.print(myarray[index]+" ");
}
To call the method from the main, use the following:
ArrayReverse(myarr);
However, myarr must be declared and populated as an integer array before the method is called
See attachment for illustration of the complete program (the main and the array reverse method)