Linux MCQ Questions & Answers

1

Which gcc option undefines a preprocessor macro?

A) -U B) -u C) -undefine D) none of the mentioned

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Answer & Solution

Answer: Option A

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2

User's Primary Group id is listed in which file, at the time of creation of the user (On a standard Unix system)

A) /etc/passwd B) /etc/groups C) /etc/login D) /etc/profile

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Answer & Solution

Answer: Option A

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3

What is the output of this program?

#include<stdio.h>
#include<fcntl.h>
#include<errno.h>
#include<sys/stat.h>
#include<sys/mman.h>
 
int main()
{
    int s_id;
    s_id = shm_open("shared_memory",O_TRUNC,0666);
    if(s_id == -1)
        perror("shm_open\n");
    return 0;
}

A) this program will give an error because OTRUNC is not a valid flag B) this program will give an error C) this program will give segmentation fault D) none of the mentioned

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Answer & Solution

Answer: Option B

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4

fc stands for

A) find command B) fix command C) both find & fix command D) none of the mentioned

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Answer & Solution

Answer: Option C

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5

In linux filesystem, the passwords of different users are stored in

A) /etc/passwd file B) /bin/passwd file C) /etc/shadow file D) /bin/shadow file

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Answer & Solution

Answer: Option C

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6

What is /proc/[PID]/root?

A) symbolic link that points to the process's root directory B) regular file which holds all the PID of the system C) root directory D) does not exists in the proc filesystem

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Answer & Solution

Answer: Option A

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7

What is the main role of the regular files in the sysfs?

A) regular files represent the attributes of devices and drivers B) regular files represent the kernel objects C) regular files represent the kernel sets D) none of the mentioned

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Answer & Solution

Answer: Option A

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8

Which of the following command provides the list of the functions defined in the login session?

A) declare -f B) declare -F C) both declare -f and -F D) none of the mentioned

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Answer & Solution

Answer: Option C

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9

If we want to get the exit status that specified targets are up to date or not, we have to execute the make command with option

A) -q B) -r C) -s D) -t

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Answer & Solution

Answer: Option A

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10

What is the output of this program?

#!/bin/bash
test_var="Example"
echo "$test_var"
echo '$test_var'
echo '"$test_var"'
echo "'$test_var'"
echo \$test_var
exit 0

A) Example
$test_var
"$test_var"
'Example'
$test_var B) Example
Example
"Example"
'Example'
Example C) program will generate an error message D) program will print nothing

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Answer & Solution

Answer: Option A

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Linux MCQ Questions & Answers | Computer Science