Q.1
The category of commands which uses both standard input and standard output are called ____
  • a) directory oriented commands
  • b) standard input commands
  • c) filters
  • d) standard output commands
Q.2
The contents of fileare: 25*50
  • a) undefined
  • b) erroneous
  • c) 429467296, 1250
  • d) 1650
Q.3
Which of the following files are known as special files in UNIX?
  • a) sample.txt
  • b) /dev/null
  • c) /dev/tty
  • d) /dev/null and /dev/tty
Q.4
The size of /dev/null is always zero.
  • a) True
  • b) False
Q.5
Which symbol is used to redirect error messages to /dev/null?
  • a) %
  • b) $
  • c) >
  • d) <
Q.6
Which file is used for indicating terminals?
  • a) /dev/tty
  • b) /dev/null
  • c) terminal file
  • d) device file
Q.7
Which symbol is used to connect different streams?
  • a) |
  • b) >
  • c) <
  • d) ~
Q.8
We can use the > symbol along with pipe in a command.
  • a) True
  • b) False
Q.9
What is the output of the following command? bc < file> result.txt
  • a) total size of .c files
  • b) size of each .c file
  • c) undefined
  • d) erroneous
Q.10
In a pipeline, the command on the left of | must use standard output and one on the right must use standard input.
  • a) True
  • b) False
Q.11
Which command saves one copy of character stream in a file and store the other to standard output?
  • a) who
  • b) ls
  • c) tee
  • d) wc
Q.12
tee is an internal command.
  • a) True
  • b) False
Q.13
Which of the following is not true about tee command?
  • a) it is a feature of the shell
  • b) it is an external command
  • c) tee command duplicates its input
  • d) tee is an internal command
Q.14
Apart from its use in redirection, /dev/tty can also be used as an argument to some commands.
  • a) True
  • b) False
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