Unix interview questions part 33
Unix interview questions part 33
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Total Questions: 20
1. Which command permits to schedule jobs for later execution, as soon as the system load permits?
Correct Answer is : batch
2. Jobs scheduled using batch command goes to a special at queue.
Correct Answer is : TRUE
3. Jobs scheduled using batch command can be removed using ___ option.
Correct Answer is : -r
4. What is a daemon?
Correct Answer is : process which runs automatically without any user interaction
5. What is cron?
Correct Answer is : a daemon
6. The cron tab is a table having a list of commands that are scheduled to be run at regular intervals.
Correct Answer is : TRUE
7. Which of the following command will remove the current crontab?
Correct Answer is : crontab -r
8. To find out how efficiently a program a used the system resources, which command is used?
Correct Answer is : time
9. Which command shows some attributes of a process?
Correct Answer is : ps
10. Which of the following attribute is not shown by ps command?
Correct Answer is : size
11. Which option is used by ps command to get a detailed listing of process attributes?
Correct Answer is : -f
12. Which option is used by the system administrator for displaying processes of a user?
Correct Answer is : -u
13. The -a option when used with ps command lists processes of all users but doesn’t display the system processes.
Correct Answer is : TRUE
14. Which option is used with ps command to list system processes?
Correct Answer is : –A and -e
15. What will the output of the following command? $ ps -t dev/console
Correct Answer is : processes running on terminal named console
16. There are ___ distinct phases of a process.
Correct Answer is : 3
17. A system call is a programmatic way in which the program requests for the service from the kernel of an operating system.
Correct Answer is : TRUE
18. Which of the following system call is used for creating a new process?
Correct Answer is : fork
19. When fork() is invoked, the child process created gets a new PID.
Correct Answer is : TRUE
20. What is the value returned by fork system call, when the creation of child process is unsuccessful?
Correct Answer is : negative integer
