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Unix Multiple Choice Interview Questions and Answers | Page-6

Questions
26 Command 1 || Command 2 means
A execute command 2 if command 1 is successful
B execute either command 1 or command 2
C execute command 2 if command 1 is unsuccessful
D none of the above

Answer: Option [C]
27 The default shell in UNIX OS is
A ksh
B sh
C csh
D bsh

Answer: Option [D]
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28 The ‘pipe’ system call in UNIX is used to:
A create a duplicate of a file
B create a named pipe
C create an unnamed pipe
D none of these

Answer: Option [B]
29 The number of default files open for every program when it starts is :
A 2
B 4
C 6
D none of these

Answer: Option [A]
30 The command ‘Sa.out 2>output’ redirects
A standard error file
B standard input file
C standard output file
D none of these

Answer: Option [A]

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