Tag: programming languages

Questions Related to programming languages

If $string contains abcdefgh , what will the following call return?
technology programming languages

  1. substr($string, -2, 2);

  2. abc

  3. efgh

  4. gh

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Correct Option: C

If $string contains abcdabcd , what will the following call return? index ($string, “cd”, 3);

technology programming languages

  1. 6

  2. 4

  3. -1

  4. 2

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Correct Option: A

Which operator can be used to access the first item in an array?
technology programming languages

  1. shift

  2. start

  3. right$

  4. left$

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Correct Option: A

Assume that $var has the value hello . What is the value of the following sting?qq(It’s time to say $var);
technology programming languages

  1. It’s time to say $var

  2. It’s time to say hello

  3. Both

  4. None

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Correct Option: B

Which modifier can be used when matching in Perl to match any character?

technology programming languages

  1. S

  2. V

  3. I

  4. C

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Correct Option: A

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

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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