Ruby MCQ On Operators
This section focuses on "Operators" in Ruby. These Multiple Choice Questions (mcq) should be practiced to improve the Ruby skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.
1. Which of the following is not type of operator in ruby?
A. Arithmetic Operators
B. Comparison Operators
C. Similar operator
D. Parallel Assignment
View Answer
Ans : C
Explanation: Similar operator is not type of operator in ruby.
2. eql? Operator is used for?
A. Used to test equality within a when clause of a case statement.
B. if the receiver and argument have both the same type and equal values.
C. if the receiver and argument have the same object id.
D. All of the above
View Answer
Ans : B
Explanation: eql? Return True if the receiver and argument have both the same type and equal values.
3. Which of the following is not a type of Bitwise Operators?
A. <<
B. ^
C. ~
D. None of the above
View Answer
Ans : D
Explanation: All the above operator comes under Bitwise Operator.
4. In range operator ... is used for ?
A. Creates a range from start point to end point inclusive.
B. Creates a range from start point to end point exclusive.
C. Creates a range from start point inclusive to end point exclusive.
D. Creates a range from start point exclusive to end point inclusive.
View Answer
Ans : B
Explanation: ... used for Creates a range from start point to end point exclusive.
5. Among the following which operator has highest Precedence?
A. ::
B. .
C. []
D. **
View Answer
Ans : A
Explanation: :: has highest Precedence in ruby.
6. What will be the output of the given code?
boolean_var = 15 < 16 && 15 < 15
puts boolean_var
A. TRUE
B. FALSE
C. Type Error
D. Syntax Error
View Answer
Ans : B
Explanation: 15<16 is true but 15<15 is false hence the overall expression will evaluate to false.
7. What will be the output of the given code?
num=4>>2
puts num
A. -2
B. 0
C. 2
D. 1
View Answer
Ans : D
Explanation: left operands value is moved right by the number of bits specified by the right operand.So the answer is 1.
8. What will be the output of the given code?
boolean_var = 3**2 != 2**3 || true
puts boolean_var
A. TRUE
B. FALSE
C. 1
D. 0
View Answer
Ans : A
Explanation: 2**3=8 and 3**2=9 both the values are not equal is true and true or true will evaluate to true hence the overall expression will evaluate to true.
9. What will be the output of the given code?
boolean_var = !(100 / 10 === 10)
puts boolean_var
A. TRUE
B. FALSE
C. Type Error
D. Syntax Error
View Answer
Ans : B
Explanation: 100/10=10 which is true but the ! before 100/10==10 will evaluate to false hence the overall expression will evaluate to false.
10. What will the following expression evaluate to?
true || false
A. TRUE
B. FALSE
C. Syntax Error
D. None of the above
View Answer
Ans : A
Explanation: Boolean operator || evaluates to false only when both the values are false.
Discussion