Perl Online Quiz

Answer : D

Explanation

All of the above data types are supported in Perl.

Q 2 - In which of the following variable context, assignment to an array or a hash evaluates the right-hand side in a list context?

Answer : B

Explanation

List − Assignment to an array or a hash evaluates the right-hand side in a list context.

Q 3 - Which of the following method pops off and returns the last value of the array?

A - push @ARRAY, LIST

B - pop @ARRAY

C - shift @ARRAY

D - unshift @ARRAY, LIST

Answer : B

Explanation

pop @ARRAY - Pops off and returns the last value of the array.

Q 4 - Which of the following function returns all values of a Hash?

A - keys

B - values

C - Both of the above.

D - None of the above.

Answer : B

Explanation

values − You can get a list of all of the values from a hash by using keys function.

Q 5 - Which of the following statement substitutes a call to the named subroutine for the currently running subroutine?

A - goto LABEL

B - goto EXPR

C - goto &NAME

D - None of the above.

Answer : C

Explanation

goto &NAME − It substitutes a call to the named subroutine for the currently running subroutine.

Q 6 - Which of the following operator checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true?

Answer : C

Explanation

<= − Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.

Q 7 - Which of the following operator encloses a string with-in invert quotes?

Answer : C

Explanation

qx{ } − Encloses a string with-in invert quotes.

Q 8 - Parameters of a function can be acessed inside the function using the special array @_?

A - true

B - false

Answer : A

Explanation

Parameters can be acessed inside the function using the special array @_. Thus the first argument to the function is in $_[0], the second is in $_[1], and so on.

Q 9 - Which of the following function opens a file in writing mode after truncating the file?

A - open(DATA, "<file.txt");

B - open(DATA, ">file.txt");

C - open(DATA, "+<file.txt");

D - None of the above.

Answer : B

Explanation

open(DATA, ">file.txt"); − opens a file in writing mode after truncating the file.

Q 10 - Which of the following function returns current position of a pointer in a file?

A - rename

B - tell

C - seek

D - None of the above.

Answer : B

Explanation

You can use tell function to know the current position of a file.

perl_questions_answers.htm