Linux Interview Questions and Answers – Process Management

1.

What is a context switch?

   A.) Kernel switches from executing one process to another
   B.) Process switches from kernel mode to user mode
   C.) Process switches from user mode to kernel mode
   D.) None of these

Answer: Option 'A'

Kernel switches from executing one process to another

2.

Pid of init process

   A.) 0
   B.) 1
   C.) 32767
   D.) none of these

Answer: Option 'B'

1

3.

What is the default maximum number of processes that can exist in Linux?

   A.) 32768
   B.) 1024 
   C.) 4096
   D.) unlimited

Answer: Option 'A'

32768

4.

How do you get parent process identification number?

   A.) waitpid
   B.) getpid()
   C.) getppid()
   D.) parentid()

Answer: Option 'C'

getppid()

5.

Parent process id of a deamon process is_________________.

   A.) 2
   B.) 3
   C.) 4
   D.) 1

Answer: Option 'D'

1

6.

The process which terminates before the parent process exits becomes

   A.) Zombie
   B.) Orphan
   C.) Child
   D.) None of these

Answer: Option 'A'

Zombie

7.

Return value of fork() system call can be:

   A.) -1,<0, 0
   B.) -1,>0, 0
   C.) -1,<0
   D.) none of these

Answer: Option 'B'

-1,>0, 0

8.

If the fork() system call returns -1, then it means?

   A.) No new child process is created
   B.) The child process is an orphan
   C.) The child process is in Zombie
   D.) none of these

Answer: Option 'A'

No new child process is created

9.

Fork returns _____ to parent process on success

   A.)
   B.) child process id
   C.) parent process id
   D.) none

Answer: Option 'B'

child process id

10.

How many times printf() will be executed in the below mentioned program?  

 
 main() 
 {
      int i;<br><br>       
      for (i = 0; i < 4; i++)      
      fork();
      printf("my pid = %d\n", getpid());
}

   A.) 4
   B.) 8
   C.) 16
   D.) 32

Answer: Option 'C'

16


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