Answer & Solution
Answer: Option B
Solution:
The variable x changes its type from number to string when reassigned.
Q
What is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
Related Questions on Average
Which type conversion happens automatically in the expression 3 + '5'?
A). Number to String
B). String to Number
C). Boolean to String
D). Number to Boolean
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
Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
C). string
D). object
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
In JavaScript, what will be the type of a variable x after x = 5 + true;?
A). number
B). string
C). boolean
D). undefined
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What does the parseInt function do in JavaScript?
A). Converts a number to a string
B). Converts a string to an integer
C). Converts a boolean to a number
D). Converts an array to a number
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
What is the type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined
What is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined