Best Perl Test - 80+ MCQs: Perl test: Evaluate Your Perl Programming Skills with Perl Questions and Answers

1. What is the purpose of the 'map' function in Perl?

Applies a transformation to each element of a list

Creates a new array

Calculates the square root of each element

Sorts elements in ascending order

2. What is the purpose of the 'last' statement in Perl?

To exit a loop

To skip to the next iteration of a loop

To jump to a specific line of code

To print a message

3. Explain the concept of Perl's 'tie::IxHash' module.

To tie variables to an ordered hash.

To manage XML data structures.

To create custom indexes for arrays.

To handle autovivification in Perl.

4. Explain the concept of Perl's 'taint mode' and its significance.

Taint mode is a security feature that prevents execution of untrusted code.

Taint mode is used for validating HTML documents.

Taint mode is a type of lexical scoping in Perl.

Taint mode is a module for handling file input/output operations.

5. Explain the purpose of the 'IPC::Run' module in Perl.

To handle inter-process communication.

To run scripts in parallel.

To manage file input/output operations.

To handle XML parsing in Perl.

6. In Perl, what is autovivification?

A process of automatic variable initialization.

A feature that automatically converts strings to numbers.

A technique to dynamically create nested data structures.

A type of variable scoping.

7. In Perl, how do you round a floating-point number to the nearest integer?

round()

ceil()

floor()

int()

8. What is the purpose of the 'my' keyword in Perl?

To declare a variable

To print output

To perform mathematical operations

To define a function

9. What does CGI stand for in Perl programming?

Common Gateway Interface

Computer Graphics Interface

Code Generation Instruction

Conditional Global Invocation

10. In Perl, how do you check if a file exists?

-e operator

-f operator

-d operator

-exists() function

11. In Perl, what is the purpose of the 'qw()' function?

Converts a string to lowercase

Defines a subroutine

Creates a list of quoted words

Calculates square root

12. Which function is used to pause execution in Perl?

sleep()

pause()

wait()

halt()

13. Which function is used to sort an array in Perl?

array_sort()

sort()

order()

arrange()

14. What is the purpose of the 'rand' function in Perl?

Generates a random number

Calculates the square root of a number

Rounds a floating-point number

Finds the remainder of division

15. What is the purpose of the 'unlink' function in Perl?

Deletes a file

Unlinks elements in an array

Removes an element from a hash

Deletes a database

16. In Perl, how do you open and read a file?

fread()

file_open()

open() and read()

open() and <>

17. Which Perl function is used for reading input from the standard input?

input()

readline()

scanf()

gets()

18. What is the purpose of the 'autobox' module in Perl?

To automate the process of box packing.

To handle autovivification in Perl.

To provide object-oriented syntax for built-in Perl types.

To optimize regular expressions.

19. In Perl, how do you declare an array?

@myArray

#myArray

$myArray

&myArray

20. Which operator is used for string concatenation in Perl?

21. Explain the purpose of the 'tie' and 'tied' functions in Perl.

To bind a variable to an object and retrieve its methods

To concatenate two strings

To create a linked list

To declare a variable as tied

22. How do you comment a single line in Perl?

# SingleLineComment

// SingleLineComment

-- SingleLineComment

/* SingleLineComment */

23. What is the purpose of the 'Class::Struct' module in Perl?

To define and manipulate classes and objects.

To manage file structures in Perl.

To handle XML data structures.

To generate random class structures.

24. Which operator is used for conditional execution in Perl?

? :

if else

switch case

&& ||

25. Which function is used for pattern matching in Perl?

search()

match()

regex()

26. What is the purpose of the 'use strict;' pragma in Perl?

Enforces strict type-checking

Allows lax variable naming

Enhances code performance

Disables error reporting

27. What is the purpose of the 'sprintf' function in Perl?

Formats strings

Searches for a pattern in a string

Calculates square root

Sorts elements in ascending order

28. What is the significance of the 'autodie' pragma in Perl?

To automatically die when an error occurs.

To handle autovivification in Perl.

To create custom exceptions.

To optimize regular expressions.

29. What is the 'namespace::autoclean' module used for in Perl?

To manage namespaces in Perl.

To clean up the namespace of a module.

To create automatic namespaces.

To handle XML namespace declarations.

30. Explain the use of the 'pack' and 'unpack' functions in Perl.

To compress and decompress files.

To manipulate bit strings and convert binary data.

To format strings with specified patterns.

To encrypt and decrypt data.

Perl MCQ Test 3