What is the simplest type of data that Perl can work with?

   1. element
   2. scalar
   3. vector
   4. component

and then (in the answer section):

The simplest type of data that Perl can work with is called a scalar. Answer: C.

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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;

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The command open KAREN, "sw"; should be used to open a filehandle named KAREN
to an existing file named sw. Answer: B.

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Which operator can be used to take the bottom item from an array?

   1. pop
   2. push
   3. pull
   4. plant