Tag: programming languages

Questions Related to programming languages

Which of the following operators work most like substitution?

technology programming languages

  1. /f

  2. /g

  3. s///

  4. m//

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Correct Option: C

Running your Perl scripts with a d switch will perform which task?
technology programming languages

  1. Invoke the Perl debugger

  2. Disable the Perl debugger

  3. Disable breakpoints

  4. Display a stack trace

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Correct Option: A

Which file test can be done to see if a file is a socket?

technology programming languages

  1. -s

  2. -l

  3. -S

  4. -k

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Correct Option: A

How can you include code from another file in your program?
technology programming languages

  1. With the #include preprocessor command

  2. Adding the file’s directory to @INC and then passing the filename to require.

  3. Both A & B

  4. None of the above

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Correct Option: C

What will the following statement return?
technology programming languages

  1. grep(! /^ !/, @array);

  2. Every non empty list element

  3. Every list element that does not start with an exclamation mark.

  4. Every list element.

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Correct Option: B

What is the default sort order in Perl?
technology programming languages

  1. alphabetic

  2. numeric

  3. ASCII

  4. none of the above

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Correct Option: C

Rather than using print, what is often used in Perl when formatting is important?
technology programming languages

  1. printf

  2. format

  3. align

  4. show

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Correct Option: A

If $string contains abcdefghijiklmdef , what will the following call return? rindex($string , "def", 11 );
technology programming languages

  1. 14

  2. 3

  3. 4

  4. 15

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Correct Option: B

Consider the following program code: %hash = (small => 8oz, medium => 16oz, large => 32oz); @keys = sort(keys(%hash)); for ($i = 0; $i < 3; $i++) { print($hash{$keys[$i]}\n); } What is the result of executing this program code?
technology programming languages

  1. The code will fail at line 1 because a hash cannot contain both numeric and string data.

  2. The code will execute without error but will output nothing.

  3. The code will output the following: 32oz 16oz 8oz

  4. The code will output the following: large medium small

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Correct Option: C

Which of the following will call a subroutine named "mom"?
technology programming languages

  1. &mom

  2. $mom

  3. mom$

  4. %mom%

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Correct Option: A