Perl Scripting Interview Questions And Answers for experienced professionals from Coding Compiler. These Perl Scripting interview questions were asked in various interviews conducted by top multinational companies across the globe. We hope that these interview questions on Perl Scripting will help you in cracking your job interview. All the best and happy learning.
- Perl Scripting Interview Questions
- Perl Scripting Interview Questions And Answers
- Advanced Perl Scripting Interview Questions and Answers
- Frequently Asked Perl Scripting Interview Questions
Perl Scripting Interview Questions
- Define Perl Scripting?
- Why To Use Perl Scripting?
- Compare Perl with C
- What are the advantages of programming in Perl?
- What factors do you take into consideration to decide if Perl is a suitable programming language for a situation?
- Explain the different types of data Perl can handle.
- Why Do You Create An Application For Real-Time System In Which Processing Speed Is Vital?
- Is Perl Compiler or Interpreter?
- Which operator in Perl is used for the concatenation of two strings?
- What is CPAN in Perl?
Perl Scripting Interview Questions And Answers
Q. Define Perl Scripting?
Answer :
In the IT market, Perl scripting is considered as a robust scripting language which is used in various fields. Perl is good at obtaining Regular expressions and in all the fields of application it is unique. Perl is a scripting language which is based on interpreter but not on the languages based on compiler. In all the applications, optimization is used.
Q. Why To Use Perl Scripting?
Answer :
Perl scripting is mainly used in functional concepts as well as regular expressions, you can also design own policies to obtain generalized pattern using regular expression. Perl is compatible or supports more than 76 operating systems and 3000 modules and it is known as Comprehensive Perl Archive Network modules.
Q. Compare Perl with C
Answer
| S.No | Perl | C |
| 1 | There are several development tools in Perl as compare to C | Development tools are less and are not very advanced |
| 2 | It executes in a slower manner than C in a few situations | C has speed almost equal to that of Perl |
| 3 | Code can be hidden in Perl | The same is not possible in case of C |
| 4 | Executable can be created without depending on the additional tools | Additional tools is the prime requirement |
Q. What are the advantages of programming in Perl?
Perl is easier to understand due to its simple syntax
-is easier to use due to its flexibility
-supports OOP
-is easily readable
Q. What factors do you take into consideration to decide if Perl is a suitable programming language for a situation?
If the application to be developed is web based, Perl provides a lot of flexibility in programming such applications and is most popularly used.
As PERL is free, we can save on the cost of acquiring license for the programming language.
Q. Explain the different types of data Perl can handle.
Scalars: store single values and are preceded by $ sign
– Arrays: store a list of scalar values and are preceded by @ sign
– Hashes: store associative arrays which use a key value as index instead of numerical indexes. Use % as prefix.
Q. Why Do You Create An Application For Real Time System In Which Processing Speed Is Vital?
Answer :
Perl is used in the following cases:
• To process large text
• When data manipulation is done by application
• If you require fast developments expand to become libraries
• To load database operations
Q. Is Perl Compiler or Interpreter?
Ans:
Perl is said to be both compiler and interpreter. It reads the source code, converts the program into bytecode before execution and then runs it. Hence, Perl is sometimes called an interpreter/compiler.
Advanced Perl Scripting Interview Questions and Answers
Q. Which operator in Perl is used for the concatenation of two strings?
Ans:
The operator used for the concatenation of strings is (.) operator.
Q. What is CPAN in Perl?
Ans:
CPAN stands for Comprehensive Perl Archive Network. It is a repository which contains thousands of Perl modules.
Q. When does circular reference occur?
Ans:
When the two references also contain references to each other, then the case of circular reference occurs.
Q. What happens in dereferencing?
Ans:
Value to the location from the reference point is returned.
Q. What are the two different types of data perl handles?
ANswer:Perl handles two types of data they are
(i) Scalar Variables and
(ii) Lists
Scalar variables hold a single data item whereas lists hold multiple data items.
Q. What are scalar variables?
Answer:
Scalar variables are what many programming languages refer to as simple variables. They hold a single data item, a number, a string, or a perl reference. Scalars are called scalars to differentiate them from constructs that can hold more than one item, like arrays.
Q. Explain about lists?
Answer:
A list is a construct that associates data elements together and you can specify a list by enclosing those elements in parenthesis and separating them with commas. They could themselves be arrays, hashes or even other lists. Lists do not have a specific list data type.
Q. Explain about Typeglobs?
Answer:
Type globs are another integral type in perl. A typeglob`s prefix derefrencer is *, which is also the wild card character because you can use typeglobs to create an alias for all types associated with a particular name. All kinds of manipulations are possible with typeglobs.
Q. What are the advantages of Perl language?
Ans:
Perl advantages:
- Its syntax is simple, which makes it easy to understand.
- It supports OOP concepts.
- Perl programs run easily on the system.
- It is more flexible to use.
- It supports all platforms and is much more portable.
- It has a rich set of Perl modules and free software.
- It is much more efficient to work on text and string manipulation as it is a scripting language.
- Perl combines features of many other languages which make it easy to understand.
Frequently Asked Perl Scripting Interview Questions
Q. What are the advantages of Perl language?
Answer:
Perl disadvantages
- A Perl program containing CPAN modules will not run on another system which doesn’t have CPAN modules installed.
- It is an interpretative language, so it is slower in comparison with other languages.
- It has untidy and unreadable codes.
- It starts creating problems when the code is larger than 200 lines.
- It is not portable.
Q. What is Perl push array function?
Ans: The Perl push array function appends a new element at the end of an array.
Q. What is Perl pop array function?
Ans:
The Perl pop array function removes the last element of an array.
Q. How to Debug Perl Programs
Start perl manually with the perl command and use the -d switch, followed by your script and any arguments you wish to pass to your script:
“perl -d myscript.pl arg1 arg2”
Q. What is a subroutine?
Answer:
A subroutine is like a function called upon to execute a task.
subroutine is a reusable piece of code.
Q. what does this mean ‘$^0’? tell briefly
Answer:
$^ – Holds the name of the default heading format for the default file handle. Normally, it is equal to the file handle’s name with _TOP appended to it.
Q. Adding and Removing Elements in Array
Answer:Use the following functions to add/remove and elements:
push(): adds an element to the end of an array.
unshift(): adds an element to the beginning of an array.
pop(): removes the last element of an array.
shift() : removes the first element of an array.
Q. How to get the hash size?
Answer: %ages = (‘Martin’ => 28, ‘Sharon’ => 35, ‘Rikke’ => 29);
print “Hash size: “,scalar keys %ages,”\n”;
Q. What does the word subroutine stand for?
Answer:
It is a block of code used in the above-mentioned programming language which is implemented together in order to task any task. It can be executed at any point in time in any program. To mention some of its advantages, it helps to execute modular programming making it simpler to understand. It also helps to eliminate duplication of any program reusing the same code in the programming language.
Q. What Is A Transactions?
Answer :
A transaction is a logical unit of work in which, all the steps must be performed or none.
Q. Is The Log File Is A Part Of File Group?
Answer :
No, Log file is a never part of file group.
Q. What is Perl one-liner?
Answer: There are two ways a Perl script can be run:
–from a command line, called one-liner, that means you type and execute immediately on the command line. You’ll need the -e option to start like “C:\ %gt perl -e “print \” Hello\”;”. One-liner doesn’t mean one Perl statement. One-liner may contain many statements in one line.
–from a script file, called Perl program.
Related Interview Questions
- SAP HANA Interview Questions
- Core Java Interview Questions
- JSF Interview Questions
- JSP Interview Questions
- JPA Interview Questions
- Spring Framework Interview Questions
- Spring Boot Interview Questions
- Core Java Multiple Choice Questions
- 60 Java MCQ Questions And Answers
- Aricent Java Interview Questions
- Accenture Java Interview Questions
- Advanced Java Interview Questions For 5 8 10 Years Experienced
- Core Java Interview Questions For Experienced
- GIT Interview Questions And Answers
- Network Security Interview Questions
- CheckPoint Interview Questions
- Page Object Model Interview Questions
- Apache Pig Interview Questions
- Python Interview Questions And Answers
- Peoplesoft Integration Broker Interview Questions
- PeopleSoft Application Engine Interview Questions