Top 30 Perl Interview Questions 2020

Coding Tag offers you the PERL interview questions with detailed explanations of every section covering PERL language basics that are required before facing a PERL developer interview.

1) PERL stands for?

Practical Extraction and Report Language

2) Who Developed the PERL language?

Larry Wall

3) What is PERL?

Perl is the most prominent interpreted open source programming language containing a wide range of libraries, programmer, and resources used for various tasks related to web development, system administration, network programming, GUI development, report language, practical extraction and other bulk text processing tasks.

PERL is trendier nowadays due to its rapid development cycle and text manipulation capabilities.

4) List some features of PERL?

PERL contain effective inbuilt regular expressions for Data Transformation and Filtration

Support web data encryption including e-commerce transactions

Support DBI package for easy web-database integration

Support Unicode, procedural and object oriented language

SWIG and XS can be used for Perl interfaces with external C++/C libraries

Perl is the request-response type of language

Single script can be used in multiple devices

Platform independent

It is simple to learn Perl language

5) What is the main reason for choosing PERL language as a scripting language?

Following are the reasons for selecting PERL languages as a scripting language:

Perl single line of code is equivalent to multiple line codes in another language.

Single script can be used in multiple devices

You don't need to implement our own logic as in Python or C

It contains huge built-in parsing interpreter, pattern matching, and regular expressions.

6) Differentiate Between USE and REQUIRE?

USE	REQUIRE
Act at compile time (Perl compilation phase)	Act at runtime
File extension is not required	File extension is not required
Used for only modules	Used for modules and libraries

7) How can you empty an array?

There are three methods to empty an array that is as follows:

By setting length placing its length to any negative number.

By assigning a null list().

Set an array to undef to clear it.

8) Is the length of Perl code is same as in C++ and Java code?

Perl code is less as a comparison to Java and C++ language since Perl code is one-fifth the size of the C++ code, we need less to maintain, write and debug.

9) Is Binary extension can be load dynamically?

Yes, the Binary extension can be loaded dynamically if your systems support it.

10) Between the list and the terms, which has the highest precedence?

Terms have the highest precedence in comparison with list operators. Terms are variables, expressions in parenthesis, quotes etc.