Basics in Unix System : Practice MCQ Questions & Answers with Explanations

It is the first process in the system.

It has PID 1.

It is generally the parent of the login shell.

Init forks and execs a ‘getty’ process at every port connected to a terminal.

$ tr shortlist head -3 '[a-z]' '[A-Z]'

$ head -3 shortlist | tr '[a-z]' '[A-Z]'

$ tr head -3 shortlist '[A-Z]' '[a-z]'

$ tr '[a-z]' '[A-Z]' shortlist | head -3

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Only Statement I is correct

Only Statement II is correct

ls -l | grep "June" | sort +10r

ls -l | grep -n "June" | sort +10x

ls -l | grep -v "June" | sort +10n

ls -l | grep "June" | sort +10n

Statement II and Statement III only

Statement I and Statement III only

Statement I and Statement II only

Statement I, Statement II, and Statement III

Zombie Processes

Stopped Processes

Sleeping processes

Orphan Processes

Both Heap and Stack

Stack

Heap

Shared memory segments

Each i-node is 256-bytes long

All the files and directories are stored in data blocks

An i-node contains accounting information as well as enough information to locate all the disk blocks that holds the file’s data.

Super block contains the number of i-nodes, the number of disk blocks, and the start of the list of free disk blocks.

QUIT is similar to TERM, except that it defaults to producing a core dump if not caught.

KILL is a blockable signal.

INT signal is sent by the terminal driver when one types < Control-C > and it is a request to terminate the current operation.

TERM is a request to terminate execution completely. The receiving process will clean up its state and exit.

It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process.

It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background.

It counts the errors during the execution of a process, a, and puts the result in process b.

It copies the ‘ l ’ numbers of lines of program from file, a, and stores in file b.

Cron reads configuration files that contain list of command lines and the times at which they invoked.

The cron daemon is the standard tool for running commands on a pre-determined schedule.

It starts when the system boots and runs as long as the system is up.

Crontab files for individual users are not stored.

Only Statement I is correct

Both Statement I and Statement II are incorrect

Only Statement II is correct

Both Statement I and Statement II are correct

contrab

inittab

init

gettydefs

64 GB

1 GB

32 GB

16 GB

store information entered by a user application program or utility program

provide a mechanism to map physical device to file names

buffer data received in its input from where a process reads

store list of file names plus pointers associated with i-nodes

(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)

(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)

chmod ugo+x myfile

chmod a+x myfile

chmod +x myfile

All of the above

Remove file chap[1 - 3]

Remove file chap01, chap02, chap03

Remove file chap0[1 - 3]

None of the above

for val; do echo -n $val; done < one two three

for one two three; do echo -n -; done

for n in one two three; do echo -n $n; done

for n in one two three {echo -n $n}