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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 Hashes 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 : C
Explanation
Hashes are unordered sets of key/value pairs that you access using the keys as subscripts. They are preceded by a percent sign (%).
Q 2 - Which of the following special variable represents current package name?
Answer : A
Explanation
_PACKAGE_ -represents current package name.
Q 3 - Which of the following method sorts the LIST and returns the sorted array value?
Answer : D
Explanation
sort [ SUBROUTINE ] LIST − This function sorts the LIST and returns the sorted array value. If SUBROUTINE is specified then specified logic inside the SUBTROUTINE is applied while sorting the elements.
Q 4 - How will you delete a key/value pair to a hash?
Answer : B
Explanation
To remove an element from the hash you need to use delete function.
Q 5 - Which of the following statement repeats a statement or group of statements until a given condition becomes true. It tests the condition before executing the loop body?
Answer : B
Explanation
until loop − Repeats a statement or group of statements until a given condition becomes true. It tests the condition before executing the loop body.
Q 6 - Which of the following operator returns true if the left argument is stringwise less than the right argument?
Answer : A
Explanation
lt − Returns true if the left argument is stringwise less than the right argument.
Q 7 - Which of the following operator returns -1, 0, or 1 depending on whether the left argument is stringwise less than, equal to, or greater than the right argument?
Answer : C
Explanation
cmp − Returns -1, 0, or 1 depending on whether the left argument is stringwise less than, equal to, or greater than the right argument.
Answer : B
Explanation
-> − The arrow operator is mostly used in dereferencing a method or variable from an object or a class name.
Q 9 - Which of the following is true about state variables?
B - These variables are defined using the state operator and available starting from Perl 5.9.4.
Answer : C
Explanation
Both of the above options are correct.
Q 10 - Which of the following is true about dereferencing?
A - Dereferencing returns the value from a reference point to the location.
Answer : C
Explanation
Both of the above options are correct.