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Perl Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Perl. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Which of the following correctly describes Array data types in Perl?
A - These are simple variables. They are preceded by a dollar sign ($).
B - These are ordered lists of scalars that you access with a numeric index which starts with 0.
C - These are unordered sets of key/value pairs that you access using the keys as subscripts.
Answer : B
Explanation
Arrays are ordered lists of scalars that you access with a numeric index which starts with 0. They are preceded by an "at" sign (@).
Q 2 - In which of the following variable context, assignment to an array or a hash evaluates the right-hand side in a list context?
Answer : B
Explanation
List − Assignment to an array or a hash evaluates the right-hand side in a list context.
Q 3 - Which of the following method joins the separate strings of LIST into a single string with fields separated by the value of EXPR, and returns the string?
Answer : C
Explanation
join EXPR, LIST − This function joins the separate strings of LIST into a single string with fields separated by the value of EXPR, and returns the string.
Q 4 - Which of the following function returns true if the named key exists in a Hash?
Answer : B
Explanation
exists − exists function, which returns true if the named key exists, irrespective of what its value might be.
Q 5 - Which of the following statement repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body?
Answer : A
Explanation
while loop − Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
Q 6 - Which of the following operator checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true?
Answer : B
Explanation
>= − Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.
Q 7 - Which of the following operator returns a list of values counting (up by ones) from the left value to the right value?
Answer : C
Explanation
.. − The range operator .. returns a list of values counting (up by ones) from the left value to the right value.
Q 8 - Which of the following function returns the current local time on the machine that runs the script?
Answer : A
Explanation
localtime − returns the current local time on the machine that runs the script.
Q 9 - Which of the following operator is used when the current value of a variable must be visible to called subroutines?
Answer : B
Explanation
The local is used when the current value of a variable must be visible to called subroutines.
Q 10 - Which of the following code create a reference for a subroutine?
Answer : D
Explanation
You can create a reference for any subroutine by prefixing it with a backslash as follows - $ref = \&PrintHash;