programming languages Online Quiz - 219

Description: programming languages Online Quiz - 219
Number of Questions: 20
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Tags: programming languages
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If $string contains abcdabcd , what will the following call return? index ($string, “cd”, 3);

  1. 6

  2. 4

  3. -1

  4. 2

Correct Option: A

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

  1. shift

  2. start

  3. right$

  4. left$

Correct Option: A

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

  1. Invoke the Perl debugger

  2. Disable the Perl debugger

  3. Disable breakpoints

  4. Display a stack trace

Correct Option: A

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

  1. -s

  2. -l

  3. -S

  4. -k

Correct Option: A

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

  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

Correct Option: C
  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.

Correct Option: B

What is the default sort order in Perl?

  1. alphabetic

  2. numeric

  3. ASCII

  4. none of the above

Correct Option: C

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

  1. printf

  2. format

  3. align

  4. show

Correct Option: A

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

  1. &mom

  2. $mom

  3. mom$

  4. %mom%

Correct Option: A

Which operator can be used to create private variables within a subroutine?

  1. native

  2. limited

  3. my

  4. regional

Correct Option: C

Within a loop, which operator jumps to the end of the loop but does not exit the loop?

  1. next

  2. last

  3. redo

  4. leave

Correct Option: A

To convert a timestamp into a format more readable by a user, which function should you use?

  1. bitwise

  2. localtime

  3. translate

  4. transform

Correct Option: B

What value do variables have before they are first assigned?

  1. undef

  2. null

  3. 0

  4. nil

Correct Option: A

Which of the following commands should be used to open a filehandle named KAREN to an existing file named sw?

  1. open KAREN ">sw";

  2. open KAREN, ">sw";

  3. open "sw" KAREN;

  4. open ">sw", KAREN;

Correct Option: B

Which command should be used to close the filehandle KAREN?

  1. close KAREN "sw";

  2. KAREN close;

  3. close KAREN;

  4. close &KAREN

Correct Option: C
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