746 + Mcqs in Linux Page 10 McqOptions

451.	In awk, the built-in variable FS is
A.	input field seperator
B.	output field seperator
C.	record seperator
D.	subscript seperator
Answer» B. output field seperator

Discussion

452.	The built-in function tolower()
A.	converts all lowercase characters into uppercase characters
B.	returns the string with all lowercase characters
C.	changes the nonalphabetic characters
D.	none of the mentioned
Answer» C. changes the nonalphabetic characters

Discussion

453.	Which built-in function divides string into pieces seperated by fieldsep and stores the pieces in array?
A.	split()
B.	divide()
C.	index()
D.	sub()
Answer» B. divide()

Discussion

454.	Which built-in function returns the arctangent of a/b in radians.
A.	atan2(a/b)
B.	atan(a/b)
C.	atan_2(a/b)
D.	none of the mentioned
Answer» B. atan(a/b)

Discussion

455.	What is the difference between the built-in functions rand() and srand() in awk programming?
A.	rand() generates the random number but srand() does not generate the random number
B.	rand() generates the same random number always whenever the program runs but srand() generates the different
C.	srand() requires the seed() function but rand() does not require to produce the same result
D.	none of the mentioned
Answer» C. srand() requires the seed() function but rand() does not require to produce the same result

Discussion

456.	Which statement instructs gawk to stop processing the current data file?
A.	next
B.	nextfile
C.	exit
D.	exitfile
Answer» C. exit

Discussion

457.	If the argument is supplied to the exit statement,
A.	its value is used as the exit status code for the awk process
B.	syntax error will generate
C.	exit returns status 0
D.	exit returns status 1
Answer» B. syntax error will generate

Discussion

458.	The next statement
A.	immediately stops processing the current record
B.	go to the next record
C.	immediately stops processing the current record & go to the next record
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

459.	Which statement skips over the rest of the loop body, causing the next cycle around the loop to begin immediately?
A.	continue
B.	break
C.	next
D.	none of the mentioned
Answer» B. break

Discussion

460.	The break statement
A.	jumps out of the innermost for loop
B.	jumps out of the innermost while loop
C.	jumps out of the innermost do-while loop
D.	all of the mentioned
Answer» E.

Discussion

461.	The comparison expression “x ~ y” will true if
A.	x is not equal to y
B.	the string x does not match the regular expression denoted by y
C.	the string x matches the regular expression denoted by y
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

462.	Concatenation is performed by
A.	writing expressions next to one another, with no operator
B.	conditional operator
C.	relational operator
D.	matching operator
Answer» B. conditional operator

Discussion

463.	All numeric values are represented within awk in
A.	double precision floating point
B.	integer
C.	exponential notation
D.	fixed point
Answer» B. integer

Discussion

464.	What is expression in awk programming?
A.	expression evaluates a value to print, test or pass to a function
B.	expression assigns a new value to a variable or field
C.	expression evaluates a value to print, test or pass to a function & also assigns a new value to a variable or field
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

465.	Which one of the following statement is not true about the format-control letters for printf statement in awk program?
A.	“c” prints a number as an ASCII character
B.	“d” prints a decimal integer
C.	“h” prints an unsigned hexadecimal integer
D.	“o” prints an unsigned octal integer
Answer» D. “o” prints an unsigned octal integer

Discussion

466.	What is the output of the command awk ‘BEGIN {printf “%c\n”,65}’
A.	A
B.	65
C.	syntax error
D.	none of the mentioned
Answer» B. 65

Discussion

467.	The command “awk {print $1} san.txt” will
A.	The command “awk {print $1} san.txt” will
B.	print the first field of every line in san.txt
C.	generate syntax error
D.	none of the mentioned
Answer» C. generate syntax error

Discussion

468.	The print and printf statements can be told to send their output to other place except standard output, is called
A.	redirection
B.	redistribution
C.	reinsertion
D.	none of the mentioned
Answer» B. redistribution

Discussion

469.	In awk program, the statement “print” with no items
A.	is equivalent to “print $0”
B.	prints the entire current record
C.	is equivalent to “print $0” & prints the entire current record
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

470.	What is the meaning of $ sign in awk programming?
A.	the word following is the name of variable
B.	we are refering to a field or column in the current line
C.	$ sign is used for comment
D.	none of the mentioned
Answer» C. $ sign is used for comment

Discussion

471.	An awk program can be run by
A.	including the program in the command that runs awk
B.	putting it into a file and run with a command
C.	running an executable awk script
D.	all of the mentioned
Answer» E.

Discussion

472.	Which option is used by sed to specify that the following string is an instruction or set of instructions?
A.	-n
B.	-e
C.	-f
D.	-i
Answer» B. -e

Discussion

473.	Which command will delete all the blank lines in file old.txt?
A.	sed ‘/d’ old.txt
B.	sed ‘/^/d’ old.txt
C.	sed ‘/^$/d’ old.txt
D.	sed ‘/^*/d’ old.txt
Answer» D. sed ‘/^*/d’ old.txt

Discussion

474.	Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?
A.	sed ‘s/cat/mouce/g’ old.txt > new.txt
B.	sed ‘s/cat/mouse’ old.txt new.txt
C.	sed ‘/s/cat/mouse/g’ old.txt new.txt
D.	sed ‘/s/cat/mouse’ old.txt > new.txt
Answer» B. sed ‘s/cat/mouse’ old.txt new.txt

Discussion

475.	Which sed command deletes the specified address range
A.	[address range]/s
B.	[address range]/p
C.	[address range]/d
D.	[address range]/y
Answer» D. [address range]/y

Discussion

476.	If no file is specified in sed command then
A.	sed command will not work
B.	sed reads from standard input
C.	sed reads the data already present in buffer
D.	it is necessary to provide the filename
Answer» C. sed reads the data already present in buffer

Discussion

477.	Which is the correct syntax for sed on command line?
A.	sed [options] ‘[command]’ [filename].
B.	sed ‘[command]’ [options] [filename].
C.	sed [filename] [options] ‘[command]’
D.	sed ‘[command]’ [filename] [options].
Answer» B. sed ‘[command]’ [options] [filename].

Discussion

478.	Sed maintains the hold space (a buffer) to
A.	copy the each line of input
B.	save the data for later retrieval
C.	copy the each line of input & save the data for later retrieva
D.	none of the mentioned
Answer» C. copy the each line of input & save the data for later retrieva

Discussion

479.	What is sed?
A.	a non-interactive stream editor
B.	an IDE
C.	a hex editor
D.	none of the mentioned
Answer» B. an IDE

Discussion

480.	Which command sets the number for all lines?
A.	:set li
B.	:set ln
C.	:set nu
D.	:set nl
Answer» D. :set nl

Discussion

481.	Which command shows all the abbreviations in vi editor?
A.	ab
B.	abb
C.	show
D.	none of the mentioned
Answer» B. abb

Discussion

482.	In vi editor, which command reads the content of another file?
A.	read
B.	r
C.	ex
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

483.	Which command searches the string in file opened in vi editor?
A.	/ or ?
B.	f or F
C.	t or T
D.	none of the mentioned
Answer» B. f or F

Discussion

484.	Which one of the following statement is true?
A.	autoindentation is not possible in vi editor
B.	autoindentation can be set using the command ‘:set ai’
C.	autoindentation can be set using the command ‘:set noai’
D.	autoindentation is set by default in vi editor
Answer» C. autoindentation can be set using the command ‘:set noai’

Discussion

485.	Which command is used to delete the character before the cursor location in vi editor?
A.	X
B.	x
C.	d
D.	D
Answer» B. x

Discussion

486.	Which vi editor command copies the current line of the file?
A.	yy
B.	yw
C.	yc
D.	none of the mentioned
Answer» B. yw

Discussion

487.	In vi editor, the key combination CTRL+f
A.	moves screen down one page
B.	moves screen up one page
C.	moves screen up one line
D.	moves screen down one line
Answer» B. moves screen up one page

Discussion

488.	Which command is used to close the vi editor?
A.	q
B.	wq
C.	both q and wq
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

489.	Which one of the following statement is not true?
A.	vim editor is the improved version of vi editor
B.	vi editor commands are not case sensitive
C.	vi editor has two modes of operation: command mode and insert mode
D.	vi stands for visual editor
Answer» C. vi editor has two modes of operation: command mode and insert mode

Discussion

490.	Which command executes ‘command’ in place of the current process instead of creating a new process?
A.	exec
B.	command
C.	trap
D.	none of the mentioned
Answer» B. command

Discussion

491.	Which command generates possible completions for string according to the and write it to standard output?
A.	compgen
B.	complete
C.	continue
D.	none of the mentioned
Answer» B. complete

Discussion

492.	Which option of the command ‘cd’ use the actual filesystem path for cd.. and the value of pwd?
A.	-l
B.	-L
C.	-p
D.	-P
Answer» E.

Discussion

493.	Which command runs the shell built-in command ‘command’ with the given argument?
A.	builtin
B.	caller
C.	there is no command present for this purpose
D.	none of the mentioned
Answer» B. caller

Discussion

494.	Which command prints the accumulated user and system times for processes run from the shell?
A.	time
B.	times
C.	both time and times
D.	none of the mentioned
Answer» C. both time and times

Discussion

495.	Which command wait for the specified process to complete and return the exit status?
A.	sleep
B.	wait
C.	delay
D.	stop
Answer» C. delay

Discussion

496.	Which command identifies the resource of a command?
A.	type
B.	typeset
C.	select
D.	source
Answer» B. typeset

Discussion

497.	The command ‘ulimit’
A.	set a limit on specified resource for system users
B.	set/show process resource limit
C.	set a limit on specified resource for system users & set/show process resource limit
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

498.	Which command puts a script to sleep untill a signal is recieved?
A.	sleep
B.	suspend
C.	disown
D.	break
Answer» C. disown

Discussion

499.	Which command removes a directory from directory stack?
A.	dirs
B.	popd
C.	pushd
D.	rm
Answer» C. pushd

Discussion

500.	Which option of the kill command sends the given signal name to the specified process?
A.	-l
B.	-n
C.	-s
D.	-a
Answer» D. -a

Discussion

Explore topic-wise MCQs in Technical Programming.

In awk, the built-in variable FS is

The built-in function tolower()

Which built-in function divides string into pieces seperated by fieldsep and stores the pieces in array?

Which built-in function returns the arctangent of a/b in radians.

What is the difference between the built-in functions rand() and srand() in awk programming?

Which statement instructs gawk to stop processing the current data file?

If the argument is supplied to the exit statement,

The next statement

Which statement skips over the rest of the loop body, causing the next cycle around the loop to begin immediately?

The break statement

The comparison expression “x ~ y” will true if

Concatenation is performed by

All numeric values are represented within awk in

What is expression in awk programming?

Which one of the following statement is not true about the format-control letters for printf statement in awk program?

What is the output of the command awk ‘BEGIN {printf “%c\n”,65}’

The command “awk {print $1} san.txt” will

The print and printf statements can be told to send their output to other place except standard output, is called

In awk program, the statement “print” with no items

What is the meaning of $ sign in awk programming?

An awk program can be run by

Which option is used by sed to specify that the following string is an instruction or set of instructions?

Which command will delete all the blank lines in file old.txt?

Which command is used to replace word ‘cat’ (already present in the file) with ‘mouse’ at all places in a file ‘old.txt’ and save the result in a new file ‘new.txt’?

Which sed command deletes the specified address range

If no file is specified in sed command then

Which is the correct syntax for sed on command line?

Sed maintains the hold space (a buffer) to

What is sed?

Which command sets the number for all lines?

Which command shows all the abbreviations in vi editor?

In vi editor, which command reads the content of another file?

Which command searches the string in file opened in vi editor?

Which one of the following statement is true?

Which command is used to delete the character before the cursor location in vi editor?

Which vi editor command copies the current line of the file?

In vi editor, the key combination CTRL+f

Which command is used to close the vi editor?

Which one of the following statement is not true?

Which command executes ‘command’ in place of the current process instead of creating a new process?

Which command generates possible completions for string according to the and write it to standard output?

Which option of the command ‘cd’ use the actual filesystem path for cd.. and the value of pwd?

Which command runs the shell built-in command ‘command’ with the given argument?

Which command prints the accumulated user and system times for processes run from the shell?

Which command wait for the specified process to complete and return the exit status?

Which command identifies the resource of a command?

The command ‘ulimit’

Which command puts a script to sleep untill a signal is recieved?

Which command removes a directory from directory stack?

Which option of the kill command sends the given signal name to the specified process?