Answer & Solution
Answer: Option B
Solution:
In JavaScript, the + operator concatenates strings. Since one operand is a string, the number is converted to a string, resulting in '55'.
Q
What is the result of the expression 5 + '5'?
Related Questions on Average
What does the !! operator do to a value?
A). Negates the value
B). Converts the value to its boolean equivalent
C). Increments the value by 2
D). No effect
Which operator is used for string concatenation in JavaScript?
A). -
B). *
C). +
D). /
Which of the following is not a comparison operator?
A). ==
B). >
C). <=
D). =
What is the output of 10 > 5 && 5 < 2?
A). 1
B). 0
C). 1
D). 0
Which operator checks if two values are not equal and also checks for type?
A). !=
B). !==
C). <
D). >
What does typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What is the result of the expression 3 * '3'?
A). 9
B). 9
C). 33
D). NaN
What does the typeof operator return for an array?
A). object
B). array
C). list
D). collection
What is the result of '5' - 2?
A). 3
B). 3
C). 03-May
D). NaN
What is the value of the expression null == undefined?
A). 1
B). 0
C). null
D). undefined