Answer: Using secure copy 'SCP' we can copy all files from a remote directory into local folder. It also replaces existing files.
Explanation:
This is illustrated as follows:
scp -r username@IP:/path/to/server/source/folder/ .
-r is recursively copy all files
username is your username in your system
IP, here you cab specify the IP or type the website such as www.google.com
Then we specify the path, complete path
"." dot here refers the current directory. To copy the contents in the current directory.
When a user process is running and an instruction is executed that requests a file-open operation, which of the following event will occur? (A) Supervisor call (B) Trap (C) I/O interrupt (D) Fault (E) None of the above
Answer:e
Explanation:
Because it will automatically work
The condition that is tested by a while loop must be enclosed in parentheses and terminated with a semicolon
True False
Answer:
False
Explanation:
while loop is used to execute the statement again and again until the condition is TRUE.
Syntax:
initialization;
while(condition)
{
statement;
}
we write condition within the parentheses but without terminate with the semicolon.
Therefore., the answer is False
Assume that x is an integer variable. Which of the following represents the memory address where x is stored? E) None of the Above A) x B) &x C) *x D) 2**
Answer: (B) &x
Explanation:
Here whenever any variable is stored let it be integer, char, float it is always stored in a memory location assigned as '&'. Here the location where x is stored is denoted as '&x' which means memory address of x. *x means the pointer which is pointing to the memory address of x.
The following JavaScript program is supposed to print: 1 by 4 by 9
on a single line by itself. Unfortunately the program contains at least eight mistakes. Write the corrected line beside the line in error.
var N; // Text
N := 1;
document.writeln( N );
document.writeln( “ by “);
document.writeln( “N + 3”);
document.writeln( “ by “ );
document.writeln( N + 5);
Answer:
var N; // Text
N = 1;
document.write( N );
document.write(" by ");
document.write(N + 3);
document.write(" by ");
document.write(N + 8);
Explanation:
var N; // Text
N = 1;
document.write( N );
document.write(" by ");
document.write(N + 3);
document.write(" by ");
document.write(N + 8);
The AND operator is written as two ____.
a.
asterisks
b.
equal signs
c.
ampersands
d.
plus signs
Answer:
ampersands
Explanation:
In the programming the AND operator is denoted as '&&' , two ampersands.
it is used to between two conditions and give Boolean result.
It has four possible result:
first condition TRUE second TRUE, result TRUE
first condition TRUE second FALSE, result FALSE
first condition FALSE second TRUE, result FALSE
first condition FALSE second FALSE , result FALSE
For example:
(5 > 0 && 7 > 4): it gives the result TRUE because both are true.
5 > 8 && 7 > 4): it gives the result FALSE because one is false.
a. Is there any functional difference between the class being instantiated in the following two ways? Balanced bal = new Balanced ("abc", "xyz"); Balanced bal = new Balanced ("cab", "zxy"); b. Is there any functional difference between the class being instantiated in the following two ways? Balanced bal = new Balanced ("abc", "xyz"); Balanced bal = new Balanced ("abc", "zxy"); c. Is there any functional difference between the class being instantiated in the following two ways? Balanced bal = new Balanced ("abc", "xyz"); Balanced bal = new Balanced ("xyz", "abc"); d. What type is pushed onto the stack? A char? An int? An integer? explain. e. Under which circumstances is the first opeation performed on the stack (not counting the new operation) the top operation? f. What happens if the string expression, that is passed to the test method, is an empty string?
Answer:
A,B,C -NO
D-Value type like int,char..
E.pop
D. it throws null exception
Explanation:
(A,B,C)There is no functional difference but as the values passed to the parameterized constructor is different so you will get different outputs but functionality of the class didn't change
(D) stack is a data structure which stores value types where as heap stores object types.In.stack actual value of the variable stored and heap address of the object stored
(E)the top operation on stack is always pop once we inserted the elements in a stack.if there are no elements in stack pop results null
(D) if the string we passed is null or empty to the test method it returns exception we need to handle that
Write a 'C' program that contains two arrays: one that containsthe name of the months, another that contains the number of days ineach month.You should hard -code the month names and number ofdays in each month when you initialize the arrays(don't need toprompt the user for input). Then, use loop to iterate through thearrays and printout each month and the number of days in themonth.
Answer:
#include<stdio.h>
//main function
int main(){
//initialization of variable
char arr1[12][12] = {"January","February","March","April","May","June","July","August","September","October","November","December"};
int arr2[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int i,j;
//for loop for print the arrays
for(i=0;i<12;i++){
for(j=0;arr1[i][j]!='\0';j++){
printf("%c",arr1[i][j]); //for print the months
}
printf(" %d",arr2[i]); //print the days
printf("\n"); //for newline
}
return 0;
}
Explanation:
Create the main function and then define the two array with hard-code the month names and number of days in each month.
For defining the string array, you have to take the 2-D array of type 'char'.
then, take nested for loop for print the element in the array.
nested for loop means, loop inside a loop. It is used for the 2-D array. The outer loop is for row and the inner loop is for the column.
For every row, the inside loop print the string character by character with the help of printf() function which is used to display the value on the screen.
after the inner loop terminates, then another prinf() function is used for print the days after the name of the month. Then. the outer loop runs again.
This is process continues until the outer loop not terminate and finally, we get the desired output.
Develop a program so that the output will produce the following :
the circumference of the circle is 33.912
the area of the circle is 91.5624.
Answer:
#include <iostream>
using namespace std;
int main()
{
float radius = 5.4;
float circumference = 2 * 3.14 * radius;
float area = 3.14 * radius * radius;
cout<<"the circumference of the circle is "<<circumference<<endl;
cout<<"the area of the circle is "<<area<<endl;
return 0;
}
Explanation:
Include the library iostream for using the input/output instructions.
create the main function and define the variable with value. Then,
use the formula to calculate the circumference and are of circle.
[tex]circumference = 2*\pi *radius[/tex]
[tex]area = \pi * radius^{2}[/tex]
here, choose [tex]\pi = 3.14[/tex]
after that, display the result.
Note: All variable define in float type.
What would display if the following pseudocode was coded and executed? Declare String user = "Martha and George" Declare Integer number Set number = length(user) Display number
Answer:
17
Explanation:
length() is the function which is used to find the number of character the string.
character include space as well.
initially declare the string user with input "Martha and George".
then call length function which count the character within the double quotes""
total number is 17 (15 letters and 2 spaces).
and it then store in the integer.
finally print the value.
Therefore, the output is 17.
When you create an array variable, memory space is automatically reserved.
True
False
Answer:
The answer is true.
Explanation:
An array is a collection of data of the same type. It is used to handle a number ''n'' of elements in common, either of types defined by the language ( int, float, string, etc) as well as those defined by the programmer.
A one dimensional array is a structured data type that is made up of a finite, ordered collection of data of the same type.
A vector, also called a one dimensional array, is a data structure that allows you to group elements of the same type and store them in a single block of memory together, one after the other. This group of elements is identified by the same name and the position in which they are found. Ther first position of the array is position zero.
We could group in an array a series of elements of integer type, floating, etc. For example:
int a [5]; (vector of 5 integers)
float b[5]; (vector of 5 floating)
int a [] = {5,6,7,8,9};
float b [] = {5.1,5.2,5.3,5.4,5.5};
Since there are 5 elements in each array, automatically 5 memory spaces will be assigned to each vector, but if I try to create the vector of the form int a [], the compiler will show an error, because I did not indicate the size of the vector and I did not initialize its elements.
What will be the value of input_value if the value 5 is input at run time?
cin >> input_value;
if (input_value > 5)
input_value = input_value + 5;
else if (input_value > 2)
input_value = input_value + 10;
else
input_value = input_value + 15;
Answer:
15
Explanation:
The if else state is used for checking the condition and if the condition is TRUE and program can execute the statement within the if else.
Initially input_value is 5
then the if statement check the condition 5>5, condition FALSE because 5==5
it not less than 5.
then program move to else if and check condition 5>2, condition TRUE.
then, input_value = 5 + 10=15 execute and update the value to 15.
After that, program terminate the if else statement.
Therefore, the answer is 15.
The Windows 8 file management interface is called _____.
A. Windows Manager
B. File Browser
C. File Manager
D. File Explorer
Answer:
D. File Explorer
Hope that helps!
The Task Manager can be used ot track running _________________ .
Answer:
Processes
Explanation:
The Windows Task Manager helps us track processes running on the system.
It can be invoked by pressing Ctrl+Alt+Delete and selecting the 'Task Manager' option or by right clicking on the status bar and choosing 'Task Manager' menu item. Besides the running process name it also provides supplementary information about the process such as :
CPUMemoryDiskNetworkWrite a JAVA program to sort a given array of integers (1 Dimensional) in ascending order (from smallest to largest). You can either get the array as input or hardcode it inside your program.
Answer:
import java.util.Arrays;
public class sort{
public static void main(String []args){
int[] arr = {2,6,9,1,5,3};
int n = arr.length;
Arrays.sort(arr);
for(int i=0;i<n;i++){
System.out.println(arr[i]);
}
}
}
Explanation:
first import the library Arrays for using inbuilt functions.
create the main function and define the array with elements.
then, use the inbuilt sort function in java which sort the array in ascending order.
syntax:
Arrays.sort(array_name);
then, use for loop for printing the each sorting element on the screen.
The general case in a recursive function is the case for which the solution is obtained directly.
True
False
Answer: False.
Explanation:
The general case of recursive function is when the solution is obtained recursively by simplification at each step.
However, it is the base case in a recursive function when the solution is obtained directly.
The general case must be reducible to base to arrive at a solution else the recursion would be a infinite recursion.
A five-digit number is entered through the keyboard. Write a program to obtain the reversed number
Answer:
#include<iostream>
using namespace std;
int main(){
int number;
cout<<"Enter the five-digit number: ";
cin>>number;
int result = 0;
while(number != 0){
int remainder = number % 10;
result = result*10 + remainder;
number = number/10;
}
cout<<"The reverse Number is: "<<result<<endl;
return 0;
}
Explanation:
first, include the library iostream for using the input/output.
Then, create the main function and declare the variables.
Print the message on the screen by using the instruction cout.
Store the value enter by the user in the variable by using cin instruction.
Take the while which runs until the number not equal to zero.
In the while, first, take the remainder of the number by using the operator '%'.
for example:
number = 123 % 10, it gives the value 3 which is the remainder.
after that, we write logic to reverse the number:
initially, remainder =3 and result=0
result = result * 10 + remainder
so, the result will be 3
after that, suppose remainder =2 and result=3 (previous calculated)
result = 3* 10 +2.
so, the result will be 32. so the number is reversed. we store the number in reverse order.
This process continues until the condition is true.
After that, print the output.
The class at the top of exception class hierarchy is ..........................
A) ArithmeticException
B) Throwable
C) Class
D) Exception
Answer:
B) Throwable
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
There are a wide range of classes on the exception class hierarchy. All the way on the top is the Objects Class but since that is not an available answer we will move on to the next one. The next one is the Throwable class. therefore that is the answer.
**Exception is after Throwable , and Arithmetic Exception is at the bottom.... everything is a class so that is not a part of the hierarchy **
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Write the definition of a function printLarger , whichhas two int parameters and returns nothing. The functionprints the larger value of the two parameters to standard output ona single line by itself.
Answer:
void printLarger (int num_1, int num_2){
//if else statement for checking the condition
if(num_1 > num_2){
cout<<num_1<<endl; //display the output
}else if(num_1 < num_2){
cout<<num_2<<endl; //display the output
}
}
Explanation:
Create the function with return type void, it means the function returns nothing.
The number will be large if it less than the second number.
The possible condition are:
1. number_1 > number_2: the number_1 will be large.
2. number_1 > number_2: the number_2 will be large.
In the programming, if-else is the conditional statement which is used for checking the condition and gives the output accordingly.
Syntax:
if(condition){
statement;
} else if(condition){
statement;
}
when the program executes the if statement checks if condition number_1 > number_2 is true or not if true then print the output.
if the condition false, then the program control move to the else if part and then checks the condition if the condition true then print the output.
A B-tree can be ____ in three ways: inorder, preorder, and postorder.
A.
copied
B.
reversed
C.
traversed
Answer:
traversed
Explanation:
B-tree is a self balancing tree and it is a data structure which allows insertion, deletion operations.
inorder, preorder and post order, they all are traversing algorithms in the tree data structure.
inorder: first print left, then root and then right.
preorder: first print root, then left and then right.
postorder: first print left, then right and then root.
Therefore, the answer is traversed.
What is ment by WCF services in asp.net?How does it help in creating web pages?
Answer:
WCF - Windows Communication Foundation
Explanation:
WCF stands for Windows Communication Foundation.
The first version of WCF is released as a part of .NET 3.0.The later versions are 4.0 and 4.5.
WCF is used to build distributed applications. Distributed application is an application that where parts of it run on two or more systems.
For example,
We have a web application running on one server. If this web application is consuming a web server which is running on another server, then this
application is called distributed application.
The programmers can also build 3-tier web application. The 3-tiers are,
1. Presentation tier
2. Business tier
3. Data Access tier
If all 3 tiers are deployed on same machine, scalability can be an issue, if more number of users try to access the application.
If we deploy each tier on different machines, then it can handle multiple requests without degrading performance of an application.
WCF is also used to build interoperable applications. An interoperable application is an application where one application can communicate with any other application that is built on any platform.
So, the two advantages of using WCF are:
An enterprise application can use the services
provided by other.
we can have better scalability.
Earlier, we used to have web services and .NET Remoting to build distributed applications.
Web service was used to exchange messages in XML format using HTTP protocol. A .NET remoting was used to exchange messages in binary format using TCP protocol.
Microsoft unified these communicating technologies and named it as WCF.
write a program which capitalize every character after full stopin a given sentence
Answer:
#include <bits/stdc++.h>//header file which includes most of the libraries..
using namespace std;
int main() {
char st[500];//character array of length 500..
cin.getline(st,499);//taking input of the text.
for(int i=0;st[i];i++)
{
if((st[i]=='.')&& (i!=strlen(st)-1))//condition
{
st[i+1]= toupper(st[i+1]);//converting to upper case.
}
}
cout<<st<<endl;//printing the string..
return 0;
}
Input:
i am .the .great .gambler.i am going gamble everything
Output:
i am .The .Great .Gambler.I am going gamble everything
Explanation:
I have taken a character array of size 500.
Taking input as a line.
If full stop encounters then converting the character to uppercase if it exists.
Printing the output.
A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory. How many bits are needed for the opcode?
Answer:
8 bit
Explanation:
we have given that the instruction consist 150 different operation
we know that [tex]2^{8}[/tex] = 256
but we have only 150 operation
so now we check [tex]2^{7}[/tex]=128
which is less than 150 so we need 8 bit for the opcode
so the 8 bit are needed for the opcode because when we take 7 bit then [tex]2^{7}[/tex]=128 which is less than 150 and not useful so we need 8 bit
what are the elements of a Software Process Improvement (SPI) modle?
Answer: Current Situation Evaluation, Improvement Planning, Improvement Implementation, Improvement Evaluation are the elements of SPI
Explanation:
SPI modle plans to achieve a desired task of software development in terms of Current Situation Evaluation, Improvement Planning, Improvement Implementation, Improvement Evaluation, with each having a specified and detailed role to play in the software development.
What operator is used to create a validation rule? A. – B. / C. < or > D. +
Answer:
A
Explanation:BECAUSE
Relational operators, specifically < and >, are used to create validation rules that data must satisfy when being entered or modified. They set conditions such as requiring a quantity to be at least one, as in >=1.
The operator used to create a validation rule is C. < or > which are relational operators. These operators are essential in forming expressions that set the conditions data must meet to be considered valid. For instance, a typical validation rule in an Order Entry form might be that the quantity entered must be equal to or greater than one. In this case, the rule would be represented as >=1.
In database systems and programming, the proper use of relational operators, such as <, >, <=, and >=, is critical for ensuring accurate querying and data integrity. These operators allow for comparison between values, ensuring that the entered data fits within the specified parameters defined by the validation rules.
The true or false questions.
The command: find -empty -type f -exec rm { } \; will remove all empty regular files, starting from the current directory
Answer:
true
Explanation:
The command:
find -empty -type f -exec rm { } \;
carries out the following steps.
1) Finds all the empty files in the current directory and its subdirectories.
2) For each of the identified files, it executes the command specified as the parameter to exec option,namely, rm <filename>.
So effectively it removes all empty files in the directory tree starting at the current directory.
What does the /etc/shadow file contain?
Answer:
This file contains encrypted password and other information also such as password expiration values,account and other confidential stuff etc.
Explanation:
In linux this file contains passwords and confidential stuff.
This file is only readable that to by the root account and hence it is secured.
how to make secure emailcompatabil with other email system??
Answer:
To make secure email compatible with other email system as, as we know that secured email is compatible in all ways and also it provides good flexibility. So, emails should prioritize the maximum security and a strong encryption and convenience to use like user friendly apps on all their device.
There are some factors which provides a secure email as:
EncryptionPrivacyServer locationJurisdictionAuthentication
What is the difference between a sequential access tile and a random access file?
Answer: Sequential access file enables the computer system to read or write file in sequential manner whereas random access file enables to read or write randomly in a data file.
Explanation:
Sequential file access is faster than random file access, however random access uses index searches. In random access higher number of seek operations are involved whereas in sequential access the number of seek operation is less.
When designing a database, what should your first step be?
A. Clearly define the purpose of the database.
B. Divide data into tables that don't duplicate data.
C. Specify table relationships.
D. Choose the primary key for each table.
Answer:
Option A is the right answer. When designing a database the first step is to clearly define the purpose of database. What are the primary goals you want to achieve by building a database for a specific purpose. There are various methods of defining core purpose of database design.
Explanation:
As we understand defining purpose of database is the first step in database development, followed by series of steps to accomplish a database for required purpose.Requirement analysis/ elicitation defines the purpose of a database.Requirement analysis help us finding and organizing the information required i.e. purpose-the foremost step, to build a database.Gather the required information and group/ divide that information into tables.Select the unique identifier in each table to make it primary key.Set up and specify table relationships i.e one-to-one, one-to-many etc.Answer details
Grade: College
Subject: Computers and Technology
Chapter: Database Design
Keywords: designing database, relations in database, primary key etc
Final answer:
The correct answer is "clearly define the purpose of the database". The first step in designing a database is to clearly define its purpose, which guides all other design decisions such as table organization, relationships, and primary keys.
Explanation:
When designing a database, the first step should always be to clearly define the purpose of the database. This involves understanding its main functions, the kind of data it will contain, and how that data will be used. It's essential to document the purpose of the database, its anticipated users, and the ways in which it is expected to be utilized. This foundational step is critical for guiding subsequent design decisions, such as data modeling, establishing table relationships, and choosing primary keys.
After the purpose is defined, the next steps involve organizing the data efficiently. This includes dividing data into tables to minimize redundancy and establishing table relationships to link related data effectively. Defining primary keys for each table is another crucial step to ensure that each record can be uniquely identified, thus maintaining data integrity and facilitating data retrieval.
Differentiate Between register and Memory location (
Answer:
Register-it contains all the instructions that are present in the processor.
Memory location- it is the particular memory address where the data is stored.
Explanation: Difference between register and memory location are as follows :-
Register are the found in the CPU internal storage and memory location is present on the RAM.Registers are faster in movement as compared to the memory location.Register has the capacity of holding of less data as compared to the memory location which can store data in large amount .