Q
What will let x = '10'; let y = x - 5; console.log(y); output in JavaScript?

Answer & Solution

Answer: Option B
Solution:
JavaScript implicitly converts the string '10' to a number in arithmetic operations, resulting in 5.
Related Questions on Average

Which data type represents positive infinity in JavaScript?

A). Infinity

B). Number

C). NaN

D). Null

What will be the result of typeof 'hello' in JavaScript?

A). String

B). Number

C). Undefined

D). Function

What is the data type of the value true in JavaScript?

A). Number

B). String

C). Boolean

D). Undefined

Which of the following is not a valid data type in JavaScript?

A). Array

B). Symbol

C). Map

D). Tuple

What is the data type of the value 'null' (with quotes) in JavaScript?

A). String

B). Number

C). Null

D). Undefined

What will the following code snippet output: let a = 10; a += '5'; console.log(a); in JavaScript?

A). '105'

B). 105

C). 15

D). '15'

Which data type represents an intentional absence of any value in JavaScript?

A). Null

B). Undefined

C). String

D). Number

Which operator checks if an object is an instance of a specific object type in JavaScript?

A). instanceof

B). typeof

C). isInstanceof

D). isTypeOf

What is the result of 0 / 0 in JavaScript?

A). Infinity

B). 0

C). NaN

D). 1

Which data type represents a block of reusable code in JavaScript?

A). String

B). Object

C). Function

D). Number