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 is the result of true + false?
A). 0
B). 1
C). truefalse
D). NaN
Which operator is used for string concatenation in JavaScript?
A). -
B). *
C). +
D). /
Which operator checks if two values are not equal and also checks for type?
A). !=
B). !==
C). <
D). >
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
What is the result of the expression 3 * '3'?
A). 9
B). 9
C). 33
D). NaN
What is the value of the expression null == undefined?
A). 1
B). 0
C). null
D). undefined
What does the + operator do when used with two numbers?
A). Concatenates them as strings
B). Adds them
C). Multiplies them
D). Subtracts them
What does typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which of the following is a logical operator in JavaScript?
A). &&
B). ||
C). !
D). All of the above
What does the typeof operator return for a function?
A). function
B). object
C). undefined
D). method