Perl MCQs (Chapterwise Multiple Choice Questions)

In relation to Perl taint mode and @INC, which of the following command line options is used for adjusting @INC from outside the program?

-I

-wU

-E

-a

Answer & Explanation

Correct Answer: -I

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Which of the following are Classes and Objects in Perl?

Blessd

Dbmclose

Dbmopen

Tieded

Answer & Explanation

Correct Answer: Dbmopen

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The overload module provides the following public functions?

overload::StrVal(arg)

overload::Overloaded(arg)

overload::Method(obj, op)

All of the above

Answer & Explanation

Correct Answer: All of the above

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Which function returns true if the named key exists in a Hash?

check

exists

Both of the above

None of the above

Answer & Explanation

Correct Answer: exists

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How would you output the list of keys in a hash?

key %hash

scalar %hash

count %hash

keys %hash

Answer & Explanation

Correct Answer: keys %hash

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You may force yourself to declare your variables by:

using &$variables;

including the 'use strict' pragma in your program

including the 'use autouse' module in your program

using &variables;

Answer & Explanation

Correct Answer: including the 'use strict' pragma in your program

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In relation to identifier parsing in Perl, which of the following options is invalid?

$'exp

$exp'nap'

$exp'nap

All of the above are valid.

Answer & Explanation

Correct Answer: $exp'nap'

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What does die() do?

It does not throw any exceptions

Exits the process

Sets error code as 0

Set the error code based on $! or $? if the exception is uncaught

Answer & Explanation

Correct Answer: Set the error code based on $! or $? if the exception is uncaught

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You can create a reference to an existing variable or subroutine by prefixing it with a:

$

\

\\

$$

Answer & Explanation

Correct Answer: \

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What does +>> signify in file handling?

append

write/append

read/append

read/write/append

Answer & Explanation

Correct Answer: read/append

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Perl MCQ

Perl Quick Quiz

In relation to Perl taint mode and @INC, which of the following command line options is used for adjusting @INC from outside the program?

Which of the following are Classes and Objects in Perl?

The overload module provides the following public functions?

Which function returns true if the named key exists in a Hash?

How would you output the list of keys in a hash?

You may force yourself to declare your variables by:

In relation to identifier parsing in Perl, which of the following options is invalid?

What does die() do?

You can create a reference to an existing variable or subroutine by prefixing it with a:

What does +>> signify in file handling?