Computer Science · all questions

Linux
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Q441

The command "gcc -save-temps example.c" will generate

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Q442

. . . . . . . . timer is decremented only when the process is executing

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Q443

Pick the run level to run Linux in multi user mode with networking?

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Q444

What is the output of this program?

#!/bin/bash
demo_var=hello
readonly demo_var
demo_var=hi
echo $demo_var
exit 0

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Q445

The command 'hash'

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Q446

If we want to print the value of a variable in hexadecimal, we have to use "print" command with the option . . . . . . . . in GDB.

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Q447

Any file's attribute information is stored in which structure on the disk

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Q448

Solaris is the name of a flavor of UNIX from

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Q449

There are two hard links to the "file1" say hl and h2 and a softlink sl. What happens if we deleted the "file1"?

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Q450

The list of available frame buffers are stored in

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Q451

What is the output of this program?

#!/bin/bash
echo "Which file do you want to check"
read x
until [ -e $x ]
do 
echo "The file does not exist. Do you want to create? y/n"
read a
if [ $a = y ]; then  
touch $x
echo "Your file has been created successfully."
fi
done
echo "The file is present in this directory"
exit 0

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Q452

In this program the allocated memory block can store

#include<stdio.h>
#include<stdlib.h>
 
int main()
{
    int *ptr;
    ptr = malloc(10);
    return 0;
}

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Q453

Indicate the right option to search for BOB, Bob, BOb or BoB?

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Q454

What is the output of this program?

#include<stdio.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<semaphore.h>
 
int main()
{
    sem_t* sem_id;
    sem_id = sem_open("sem_value",O_CREAT,0666,0);
    if(sem_id == SEM_FAILED)
        perror("sem_open");
    if(sem_close(sem_id) == -1)
        perror("sem_close");
    sem_wait(sem_id);
    printf("Example\n");
    return 0;
}

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Q455

If a and b are 2 variables then the meaning of a<<=b is

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Q456

Which is Fastest IPC?

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Q457

What is the output of this program?

#include<stdio.h>
 
int main()
{
    fork();
    printf("Example\n");
    return 0;
}

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Q458

What UNIX command is used to update the modification time of a file?

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Q459

The print and printf statements can be told to send their output to other place except standard output, is called

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Q460

Which file is used primarily for diagnosing memory fragmentation issues ?

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