1. POSIX is a set of standards specified for establishing compatibility between operating systems.
2. Shell is a command interpreter used for interacting with a UNIX system.
3. Which part of the UNIX operating system interacts with the hardware?
Correct Answer is : Kernel
4. Two UNIX systems may or may not use the same set of system calls.
Correct Answer is : FALSE
5. What is a superuser?
Correct Answer is : system manager
6. What is the windowing system of UNIX known as?
Correct Answer is : X Window system
7. Which command is used for listing files in a directory?
8. Which option is used with ls command for long listing of files with seven attributes?
9. Which option is used with ls to display attributes of the directory ?
10. -a option is used with ls command for what purpose?
Correct Answer is : for showing hidden files
11. Which option is used with ls command to produce multi columnar output?
12. What is the collating sequence of ls command for listing files?
Correct Answer is : Numerals > Uppercase > Lowercase
13. How can we identify executables and directories from the output of ls command?
Correct Answer is : using -F option
14. $ ls -R outputs all files and subdirectories in a recursive manner.
15. -r option is same as -R option in ls command.
Correct Answer is : FALSE
16. What does the -S option do in ls command?
Correct Answer is : sorts according to file size
17. ls -s prints the allocated file size in blocks.
18. -u option sorts the files according to ____
Correct Answer is : last access time
19. -t option sorts the files according to ____
Correct Answer is : last modification time
20. The output of ls dir* is ___
Correct Answer is : all files in the directory having a filename starting with dir