Unix interview questions part 31
Unix interview questions part 31
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Total Questions: 20
1. The environment variables are available in _____
Correct Answer is : *environ[ ]
2. Which of the following functions are used for obtaining and setting the value of environment variables?
Correct Answer is : getenv and setenv
3. Which of the following action can be taken by a process upon receiving a signal?
Correct Answer is : ignore the signal, terminate and suspend the process
4. What is the default disposition of most signals?
Correct Answer is : terminate the process
5. We can run the jobs in the background in UNIX.
Correct Answer is : TRUE
6. Shell ___ operator is used for running jobs in the background.
Correct Answer is : &
7. Which command is used for running jobs in the background?
Correct Answer is : nohup
8. It is necessary to terminate the command line with &, even when we are using nohup command.
Correct Answer is : TRUE
9. Which of the following shell(s) allows the user to run jobs in the background even when the user has logged out (without using nohup command)?
Correct Answer is : C and bash
10. When nohup command is used, shells returns the _____
Correct Answer is : PID
11. nohup command doesn’t send the standard output of a command to any file.
Correct Answer is : FALSE
12. What is the PID of the process who takes the parentage of the process run with nohup command?
Correct Answer is : 1
13. Which command is used for executing jobs according to their priority?
Correct Answer is : nice
14. It is better to use & with nice command.
Correct Answer is : TRUE
15. nice command is a ______ command in C shell.
Correct Answer is : built-in
16. Which option can be used explicitly to reduce the priority of any process.
Correct Answer is : -n
17. Which command is used for premature termination of a process?
Correct Answer is : kill
18. Which one of the following command is used for killing the last background job?
Correct Answer is : kill $!
19. By default, kill uses the SIGTERM signal (15) to terminate the process.
Correct Answer is : TRUE
20. Which signal is used with kill command to terminate the process when they ignore the SIGTERM signal (15)?
Correct Answer is : SIGKILL(9)
