Answer & Solution
Answer: Option B
Solution:
The variable y is reassigned to a boolean value true, changing its type to boolean.
Q
Given the code: let y = 10; y = true;, what is the type of y after execution?
Related Questions on Average
How can you check if a variable is an array in JavaScript?
A). typeof variable === 'array'
B). Array.isArray(variable)
C). variable instanceof array
D). variable.constructor === array
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 will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
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 will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
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 is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object
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