R4RIN – MCQs, Mock Tests | Unix/Lunux Linux Mcqs Questions Set 6

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

1. exec
2. command
3. trap
4. none of the mentioned

✅ Correct Answer: 1

Which one of the following statement is not true?

1. vim editor is the improved version of vi editor
2. vi editor commands are not case sensitive
3. vi editor has two modes of operation: command mode and insert mode
4. vi stands for visual editor

✅ Correct Answer: 2

Which command is used to close the vi editor?

1. q
2. wq
3. both q and wq
4. none of the mentioned

✅ Correct Answer: 3

In vi editor, the key combination CTRL+f

1. moves screen down one page
2. moves screen up one page
3. moves screen up one line
4. moves screen down one line

✅ Correct Answer: 1

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

1. yy
2. yw
3. yc
4. none of the mentioned

✅ Correct Answer: 2

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

1. X
2. X
3. D
4. d

✅ Correct Answer: 1

Which one of the following statement is true?

1. autoindentation is not possible in vi editor
2. autoindentation can be set using the command ‘:set ai’
3. autoindentation can be set using the command ‘:set noai’
4. autoindentation is set by default in vi editor

✅ Correct Answer: 2

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

1. / or ?
2. f or F
3. t or T
4. none of the mentioned

✅ Correct Answer: 1

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

1. read
2. r
3. ex
4. none of the mentioned

✅ Correct Answer: 3

Which command shows all the abbreviations in vi editor?

1. ab
2. abb
3. show
4. none of the mentioned

✅ Correct Answer: 1

Which command sets the number for all lines?

1. :set li
2. :set ln
3. :set nu
4. :set nl

✅ Correct Answer: 3

What is sed?

1. a non-interactive stream editor
2. an IDE
3. a hex editor
4. none of the mentioned

✅ Correct Answer: 1

Sed maintains the hold space (a buffer) to

1. copy the each line of input
2. save the data for later retrieval
3. copy the each line of input & save the data for later retrieval
4. none of the mentioned

✅ Correct Answer: 2

Which is the correct syntax for sed on command line?

1. sed [options] ‘[command]’ [filename].
2. sed ‘[command]’ [options] [filename].
3. sed [filename] [options] ‘[command]’
4. sed ‘[command]’ [filename] [options].

✅ Correct Answer: 1

If any sed command does not specify any address then the command is applied to

1. each input line
2. none of the input line
3. last input line
4. none of the mentioned

✅ Correct Answer: 1

If no file is specified in sed command then

1. sed command will not work
2. sed reads from standard input
3. sed reads the data already present in buffer
4. it is necessary to provide the filename

✅ Correct Answer: 2

Which sed command deletes the specified address range

1. [address range]/s
2. [address range]/p
3. [address range]/d
4. [address range]/y

✅ Correct Answer: 3

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’?

1. sed ‘s/cat/mouce/g’ old.txt > new.txt
2. sed ‘s/cat/mouse’ old.txt new.txt
3. sed ‘/s/cat/mouse/g’ old.txt new.txt
4. sed ‘/s/cat/mouse’ old.txt > new.txt

✅ Correct Answer: 1

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

1. sed ‘/d’ old.txt
2. sed ‘/^/d’ old.txt
3. sed ‘/^$/d’ old.txt
4. sed ‘/^*/d’ old.txt

✅ Correct Answer: 3

The command “sed -n ‘/sanfoundry/p’ old.txt” will

1. print the lines containing the word ‘sanfoundry’ in file old.txt
2. delete the lines containing the word ‘sanfoundry’ in file old.txt
3. will generate an error message
4. none of the mentioned

✅ Correct Answer: 1

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

1. -n
2. -e
3. -f
4. -i

✅ Correct Answer: 1

Which one of the following is not true?

1. nawk is the new version of awk
2. gawk is the GNU version of awk
3. linux users have the gawk
4. nawk does not provide the additional capabilities in comparison of awk

✅ Correct Answer: 4

An awk program can be run by

1. including the program in the command that runs awk
2. putting it into a file and run with a command
3. running an executable awk script
4. all of the mentioned

✅ Correct Answer: 4

Which one of the following is not true?

1. in typical awk program, all input is read either from standard input or specified files
2. awk language divides its input into records and fields
3. running an executable awk script
4. the number of fields need to be a constant

✅ Correct Answer: 4

What is the meaning of $ sign in awk programming?

1. the word following is the name of variable
2. we are refering to a field or column in the current line
3. $ sign is used for comment
4. none of the mentioned

✅ Correct Answer: 2

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

1. is equivalent to “print $0”
2. prints the entire current record
3. is equivalent to “print $0” & prints the entire current record
4. none of the mentioned

✅ Correct Answer: 3

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

1. redirection
2. redistribution
3. reinsertion
4. none of the mentioned

✅ Correct Answer: 1

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

1. print the first line of file san.txt
2. print the first field of every line in san.txt
3. generate syntax error
4. none of the mentioned

✅ Correct Answer: 2

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

1. A
2. 65
3. syntax error
4. none of the mentioned

✅ Correct Answer: 1

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

1. c prints a number as an ASCII character
2. d prints a decimal integer
3. h prints an unsigned hexadecimal integer
4. o prints an unsigned octal integer

✅ Correct Answer: 3

What is expression in awk programming?

1. expression evaluates a value to print, test or pass to a function
2. expression assigns a new value to a variable or field
3. expression evaluates a value to print, test or pass to a function & also assigns a new value to a variable or field
4. none of the mentioned

✅ Correct Answer: 3

Which one of the following is not true?

1. there are 3 types of constant expressions: numeric, string and regular
2. arithmetic operators are used to evaluate expressions
3. assignment expression is an expression that stores a value into a variable
4. comparison expressions does not compare strings for relationship

✅ Correct Answer: 4

All numeric values are represented within awk in

1. double precision floating point
2. integer
3. exponential notation
4. fixed point

✅ Correct Answer: 1

Concatenation is performed by

1. writing expressions next to one another, with no operator
2. conditional operator
3. relational operator
4. matching operator

✅ Correct Answer: 1

The comparison expression x ~ y will true if

1. x is not equal to y
2. the string x does not match the regular expression denoted by y
3. the string x matches the regular expression denoted by y
4. none of the mentioned

✅ Correct Answer: 3

The break statement

1. jumps out of the innermost for loop
2. jumps out of the innermost while loop
3. jumps out of the innermost do-while loop
4. all of the mentioned

✅ Correct Answer: 4

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

1. continue
2. break
3. next
4. none of the mentioned

✅ Correct Answer: 1

The next statement

1. immediately stops processing the current record
2. go to the next record
3. immediately stops processing the current record & go to the next record
4. none of the mentioned

✅ Correct Answer: 3

If the argument is supplied to the exit statement,

1. its value is used as the exit status code for the awk process
2. syntax error will generate
3. exit returns status 0
4. exit returns status 1

✅ Correct Answer: 1

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

1. next
2. nextfile
3. exit
4. exitfile

✅ Correct Answer: 2

The command awk {if (“9″>”10”) print sanfoundry else print linux}

1. will print sanfoundry
2. will print linux
3. will generate syntax error
4. none of the mentioned

✅ Correct Answer: 3

Which one of the following statement is not true?

1. awk’s built-in functions can be categorised into three categories: numeric, string and I/O
2. built-in functions are always available to call
3. extra arguments to built-in function causes syntax error
4. we can also define the function in awk program

✅ Correct Answer: 3

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

1. rand() generates the random number but srand() does not generate the random number
2. rand() generates the same random number always whenever the program runs but srand() generates the different
3. srand() requires the seed() function but rand() does not require to produce the same result
4. none of the mentioned

✅ Correct Answer: 2

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

1. atan2(a/b)
2. atan(a/b)
3. atan_2(a/b)
4. none of the mentioned

✅ Correct Answer: 1

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

1. split()
2. divide()
3. index()
4. sub()

✅ Correct Answer: 1

The built-in function tolower()

1. converts all lowercase characters into uppercase characters
2. returns the string with all lowercase characters
3. changes the nonalphabetic characters
4. none of the mentioned

✅ Correct Answer: 2

In awk, the built-in variable FS is

1. input field seperator
2. output field seperator
3. record seperator
4. subscript seperator

✅ Correct Answer: 1

What is FNR?

1. FNR is the current record number in the current file
2. FNR is the number of fields in the current input record
3. FNR is an array contains the value of environment
4. None of the mentioned

✅ Correct Answer: 1

RSTART is set by invoking the

1. match function
2. index function
3. asort function
4. split function

✅ Correct Answer: 1

Which one of the following is used by awk to control the conversion of numbers to string?

1. RS
2. OFMT
3. SUBSEP
4. RSTART

✅ Correct Answer: 2