Answer & Solution
Answer: Option B
Solution:
The Array.isArray method is used to check if a variable is an array.
Q
How can you check if a variable is an array in JavaScript?
Related Questions on Average
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?
A). string
B). number
C). undefined
D). boolean
What is the type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined
Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
C). string
D). object
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
What does the isNaN function do?
A). Checks if a value is not a number
B). Converts a value to a number
C). Checks if a value is a number
D). Converts a value to NaN