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Perl References - Quiz

Each question is worth one point. Select the best answer for each question.
 
1. A Perl reference is:
Please select the best answer.
  A. Limited to two-dimensional data
  B. the contents of a variable
  C. a scalar variable that points to another object

2. A dereference is:
Please select the best answer.
  A. A reference to an object in Perl.
  B. An object being accessed via a reference.
  C. A scalar variable being accessed via an object.

3. An anonymous object is:
Please select the best answer.
  A. an element of the dereferenced array
  B. an object without a name
  C. a special arrow operator

4. Refer to this code fragment to answer the following questions:
$var1 = "George";
$var2 = $var1;
$var3 = $var2;
$var4 = $$var2;
$var5 = $$var3;
Which variables are references?
Please select the best answer.
  A. $var2 and $var3
  B. $var1
  C. $var5 and $var1


5. What are they references to?
Please select the best answer.
  A. $var1
  B. George
  C. used to aggregate data into smaller dimensions


6. What is the content of $var4?
Please select the best answer.
  A. $var1
  B. "George"
  C. $var2

7. What is the content of $var5?
Please select the best answer.
  A. $var2
  B. $var1
  C. "George"

Your score is 0.0