Perl Online Quiz



Following quiz provides Multiple Choice Questions (MCQs) related to Perl. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - Which of the following data types are preceded by a dollar sign ($) in Perl?

A - Scalar

B - Array

C - Hashes

D - All of the above.

Answer : A

Explanation

Scalars are preceded by a dollar sign ($).

Q 3 - Which of the following method remove the elements of @ARRAY designated by OFFSET and LENGTH, and replaces them with LIST, if specified?

A - splice @ARRAY, OFFSET [ , LENGTH [ , LIST ] ]

B - split @ARRAY, OFFSET [ , LENGTH [ , LIST ] ]

C - join @ARRAY, OFFSET [ , LENGTH [ , LIST ] ]

D - sort @ARRAY, OFFSET [ , LENGTH [ , LIST ] ]

Answer : A

Explanation

splice @ARRAY, OFFSET [ , LENGTH [ , LIST ] ] - This function will remove the elements of @ARRAY designated by OFFSET and LENGTH, and replaces them with LIST, if specified. Finally, it returns the elements removed from the array.

Answer : A

Explanation

You can get the size − that is, the number of elements from a hash by using the scalar context on either keys or values.

Q 5 - Which of the following statement repeats a statement or group of statements until a given condition becomes true. It tests the condition before executing the loop body?

A - while

B - until

C - for

D - None of the above.

Answer : B

Explanation

until loop − Repeats a statement or group of statements until a given condition becomes true. It tests the condition before executing the loop body.

Q 6 - Which of the following operator checks if the value of two operands are equal or not, and returns -1, 0, or 1?

A - ==

B - !=

C - <=>

D - >

Answer : C

Explanation

<=> − Checks if the value of two operands are equal or not, and returns -1, 0, or 1 depending on whether the left argument is numerically less than, equal to, or greater than the right argument.

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

A - q{ }

B - qq{ }

C - qx{ }

D - enclose{}

Answer : B

Explanation

qq{ } − Encloses a string with-in double quotes.

Q 8 - Which of the following function formats date and time?

A - localtime

B - gmtime

C - time

D - strftime

Answer : D

Explanation

strftime − formats date and time.

Q 9 - Which of the following function opens a file in writing mode without truncating the file?

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

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

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

D - None of the above.

Answer : C

Explanation

open(DATA, "+<file.txt"); − opens a file in writing mode without truncating the file.

perl_questions_answers.htm
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