Linux MCQ Questions & Answers

71

In this program the fifo "my_fifo"

#include<stdio.h>
 
int main()
{
    if (mkfifo("my_fifo",0666) != 0)
        perror("mkfifo");
    return 0;
}

A) can not be created B) will be created in present working directory C) will have the execute permissions D) none of the mentioned

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Answer & Solution

Answer: Option B

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72

A user executes the following command successfully:

$ chmod +x file1.txt

Which of the following is true of the output of this command?

A) The command results in adding execute permission to the user who ran this command B) The command results in adding execute permission for the owner of the file C) The command results in an error since the file is not an executable file D) The command results in adding execute permission for all users (i.e., user,group & others)

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Answer & Solution

Answer: Option D

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73

What command would send the output of cmd1 to the input of cmd2?

A) cmd1 | cmd2 B) cmd1 || cmd2 C) cmd1 && cmd2 D) cmd1 ; cmd2

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Answer & Solution

Answer: Option A

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74

The command chmod 4777 a.out

A) will set the suid bit of a.out B) will set the suid bit of a.out only if the command is issued by root C) is not a valid command D) will set the sticky bit of a.out

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Answer & Solution

Answer: Option A

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75

Each driver in the device driver model is described by a . . . . . . . . object.

A) dev_d B) device_d C) dev_driver D) device_driver

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Answer & Solution

Answer: Option D

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76

Which GDB command reloads the debugging information?

A) file B) reload C) debug D) none of the mentioned

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Answer & Solution

Answer: Option A

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77

In linux, the static libraries are mostly installed in

A) /usr/lib B) /usr/local/lib C) both /usr/lib and /usr/local/lib D) none of the mentioned

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Answer & Solution

Answer: Option C

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78

pwd command displays

A) user password B) password file content C) present working directory D) none of the mentioned

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Answer & Solution

Answer: Option C

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79

What is the output of the following code:

os=Unix
echo 1.$os 2."$os" 3.'$os' 4.$os

A) 1.Unix 2.Unix 3.Unix 4.Unix B) 1.Unix 2.Unix 3.$os 4.Unix C) 1.Unix 2.Unix 3.Unix 4.$os D) 1.Unix 2.$os 3.$os 4.$os

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Answer & Solution

Answer: Option B

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80

Sysconf(_SC_PAGE_SIZE) returns?

A) size of the page B) max size of the page C) min size of the page D) paging allowed or not

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Answer & Solution

Answer: Option A

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Linux MCQ Questions & Answers | Computer Science