Tag: perl

Questions Related to perl

In Perl, a/n ________ is a special character or a sequence that will define the number of times the previous character or sequence appears.

perl

  1. character class

  2. metacharacter

  3. assertion

  4. quantifier

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Correct Option: D

In Perl, the following will result in which of the following, if the prize is currently "5 dollars" print 'You won $prize';
perl

  1. You won $5.00

  2. You won 5 dollars

  3. You won $prize

  4. You won $5

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Correct Option: C

In Perl, the words function and subroutines are used interchangeably.

perl

  1. True

  2. False

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Correct Option: A

AI Explanation

To answer this question, you need to understand the difference between a function and a subroutine in Perl.

Option A) True - This option is correct. In Perl, the terms "function" and "subroutine" are often used interchangeably. Both refer to a block of code that performs a specific task and can be called or invoked from other parts of the program.

Option B) False - This option is incorrect. As explained above, in Perl, the terms "function" and "subroutine" are used interchangeably.

The correct answer is A) True.

In Perl, which of the following are file handles?

perl

  1. stdquit

  2. stdend

  3. stdin

  4. stdout

  5. C&D

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Correct Option: E

In Perl, which switch is used for printing out warnings about typographical errors in your script?
perl

  1. -P

  2. -W

  3. -p

  4. -w

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Correct Option: D

In Perl, "stat" returns a thirteen element array with which of the following values?

perl

  1. Perl version ID

  2. Web server ID

  3. Last access

  4. Inode number

  5. C&E

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Correct Option: E

AI Explanation

To answer this question, we need to understand the functionality of the "stat" function in Perl. The "stat" function in Perl is used to retrieve information about a file or a filehandle. It returns a thirteen-element array that contains various attributes of the file.

Let's go through each option to understand which values are returned by the "stat" function:

Option A) Perl version ID - This option is incorrect. The "stat" function does not return the Perl version ID. It provides information about the file, not the Perl version.

Option B) Web server ID - This option is incorrect. The "stat" function does not return the Web server ID. It provides information about the file, not the web server.

Option C) Last access - This option is correct. The "stat" function returns the last access time of the file as one of the elements in the array.

Option D) Inode number - This option is correct. The "stat" function returns the inode number of the file as one of the elements in the array.

So, options C and D are correct. Therefore, the correct answer is E) C&E, as both options C and D are returned by the "stat" function in Perl.

CGI is a programming language.
perl

  1. True

  2. False

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Correct Option: B

In Perl, scalar variables always begin with a ________ sign.

perl

  1. #

  2. @

  3. %

  4. $

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Correct Option: D

AI Explanation

To answer this question, you need to understand the naming convention for scalar variables in Perl.

Option A) # - This option is incorrect because the # sign is used to indicate comments in Perl, not for naming variables.

Option B) @ - This option is incorrect because the @ sign is used to denote arrays in Perl, not for scalar variables.

Option C) % - This option is incorrect because the % sign is used to denote hashes in Perl, not for scalar variables.

Option D) $ - This option is correct because scalar variables in Perl always begin with the $ sign. Scalar variables hold single values, such as numbers or strings.

The correct answer is D. This option is correct because scalar variables in Perl are always denoted by the $ sign.

PERL is
perl

  1. Procedural

  2. OOPs

  3. Both

  4. None

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Correct Option: C

Pick the odd one out

perl

  1. ord

  2. sort

  3. reverse

  4. foreach

Show answer
Correct Option: D

AI Explanation

To answer this question, we need to identify the option that does not fit with the others.

Option A) ord - The ord function is used to return the ASCII value of a character. It is a valid function.

Option B) sort - The sort function is used to sort an array or a list in ascending order. It is a valid function.

Option C) reverse - The reverse function is used to reverse the order of elements in an array or a list. It is a valid function.

Option D) foreach - The foreach loop is used to iterate over elements in an array or a list. It is different from the other options, which are functions or methods. It is the odd one out in this context.

Therefore, the correct answer is D) foreach.