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Linux MCQ Questions & Answers | Computer Science

Learn Linux MCQ questions & answers are available for a Computer Science students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Linux MCQ question is the important chapter for a computer science and technical students. Page-9 section-10

Each section contains 100 MCQs on Linux .
81
What does the following command do?
who | wc –l
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
82
What is the output of this program?
#include<stdio.h>
#include<stdlib.h>
 
int main()
{
        char *ptr;
    free(ptr);
    return 0	   
}
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
83
What is the output of this program?
#! /usr/bin/awk -f
BEGIN {
    a=5
    while (a<5) {
        print "example"
        a++;
    }
}
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
84
Which one of the following is a read-write semaphore in linux that protects all ksets and kobjects included in the filesystem?
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
85
What is the output of this program?
#include<stdio.h>
#include<stdlib.h>
 
int main()
{
    int *ptr;
    *ptr = 10;
    *ptr = 20;
    printf("%d\n",*ptr);
    return 0;
}
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
86
The command "awk '{if ("9">"10") print "demo" else print "linux"}'"
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Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
87
Which statement instructs gawk to stop processing the current data file?
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
88
sed is a command typically used for
Discuss
Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
89
The soft link will increase the link counter of the file.(T/F)
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
90
The 'mapfile' command
Discuss
Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board