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Unix Multiple Choice Interview Questions and Answers | Page-7

Questions
31 A file is removed from the disk if
A owner of the file deletes it
B count in the open file description table becomes zero
C reference count in its inode becomes zero
D none of the above

Answer: Option [C]
32 Several UNIX commands can be combined to generate a single command using:
A ;
B |
C :
D none of these

Answer: Option [B]
33 How do you change a foreground process into a background process ?
A The simplest way to start a background process is to add an ampersand (&) at the end of the command
B The simplest way to start a background process is to add an nice command at the beginning of the foreground process command
C The simplest way to start a background process is to add an ampersand (&) at the beginning of the foreground process command
D The simplest way to start a background process is to add fg command at the beginning of the foreground process command

Answer: Option [A]
34 Which of the following commands is used to show hidden files ?
A df
B ls-i
C ls-h
D ls-a

Answer: Option [D]
35 Which of the following commands can be used to change any of the system at run-level ?
A Power off
B init
C Halt
D Reboot

Answer: Option [B]

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