To get the PID of last background process

1. echo $#
2. echo $!
3. echo $0
4. echo $$

The -v option of sh causes the shell to

1. Debugs if shell script has any error
2. Does nothing
3. Echo each command before it is executed
4. Gives verbal output

The option to o test for zero length string is

1. -s
2. -z
3. -a
4. -d

A file is identified by _____ associated with it

1. Inode number
2. Process-id number
3. Group-id number
4. User-id number

The default value of umask is

1. 777
2. 644
3. 022
4. 422

Which of the following command is used to find the largest capacity of a file (maximum bytes a file can hold)

1. Umask
2. Ulimit
3. FLargeLimit
4. None of the above

Using ___ you can accept input from the standard input, process it and send the output to the standard output

1. Filters
2. Pipe
3. Both A and B
4. None of the above

What is the internal value associated with the standard error device?

1. 0
2. 1
3. 2
4. None of the above

Block commands work

1. On group of lines
2. On single line
3. On a single file
4. None of the above

In which of the following modes vi (editor) works

1. Command mode
2. Insert mode
3. Ex command mode
4. All of the above

Which commands help in viewing lines at the beginning or at the end of the file?

1. Touch and cat
2. Head and tail
3. Touch and head
4. Cat and tail

Which of the following commands are used to save disk space?

1. Ulimit
2. Compress
3. Pack
4. Both B and C

What is the command for viewing a compressed file?

1. cat
2. touch
3. zcat
4. acat

Password created for a user is stored in a file

1. /dev/passwd
2. /usr/passwd
3. /etc/passwd
4. /bin/passwd

Which of the following is true?

1. A DOS formatted floppy can be used in Unix and a Unix formatted floppy can be used in DOS
2. A DOS formatted floppy can be used in Unix but a Unix formatted floppy cannot be used in DOS
3. A Unix formatted floppy can be used in DOS but a DOS formatted floppy cannot be used in Unix
4. None of the above

Which of the following is a metacharacter?

1. m>
2. &&
3. $1..$9
4. All of the above

Block command works in

1. Command mode
2. Insert mode
3. Ex command mode
4. All of the above

How can you create hidden files in Unix

1. *filename
2. .filename
3. $filename
4. #filename

What happens when the following command is executed?
(date; banner welcome; ls)> one 2>two

1. date along with the banner and list of all the files is written into files one and two
2. date along with the banner and list of all the files is written only into file two
3. date along with the banner and list of all the files is written only into file one
4. syntax error

Which of the following command is used to execute commands at specified date and time?

1. nohup
2. cron
3. fgrep
4. None of the above