Perl Online Quiz

Q 1 - Which of the following interpolates variables and special characters in Perl?

A - Single Quotes based String

B - Double Quotes based String

C - Both of the above.

D - None of the above.

Q 2 - Which of the following is correct about Array in Perl?

A - An array is a variable that stores an ordered list of scalar values.

B - Array variables are preceded by an "at" (@) sign.

C - To refer to a single element of an array, you will use the dollar sign ($) with the variable name followed by the index of the element in square brackets.

D - All of the above.

Q 3 - Which of the following is correct about Hashes?

A - A hash is a set of key/value pairs.

B - Hash variables are preceded by a percent (%) sign.

C - To refer to a single element of a hash, you will use the hash variable name preceded by a "$" sign and followed by the "key" associated with the value in curly brackets.

D - All of the above.

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

A - keys

B - values

C - Both of the above.

D - None of the above.

Q 5 - Which of the following operator divides left hand operand by right hand operand and returns remainder?

A - *

B - /

C - %

D - **

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

A - ==

B - !=

C - <=>

D - >

Q 7 - Which of the following operator concatenates two strings?

A - .

B - x

C - ..

D - ++

Q 8 - Which of the following function returns the universal Greenwich Mean Time, or GMT (or UTC)?

A - localtime

B - gmtime

C - time

D - strftime

Q 9 - Which of the following is true about state variables?

A - state variables maintain their state and they do not get reinitialized upon multiple calls of the subroutines.

B - These variables are defined using the state operator and available starting from Perl 5.9.4.

C - Both of the above.

D - None of the above.

Q 10 - Which of the following code create a reference for a variable?

A - $ref = \$foo;

B - $ref = \@ARGV;

C - $ref = \%ENV;

D - $ref = \&PrintHash;