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
What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
In JavaScript, what will be the type of a variable x after x = 5 + true;?
A). number
B). string
C). boolean
D). undefined
What does it mean that JavaScript is dynamically typed?
A). Variables do not have types
B). Variables can change type
C). Variables must be declared with a type
D). Variables cannot change type
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
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A). function
B). object
C). undefined
D). method
Which type conversion happens automatically in the expression 3 + '5'?
A). Number to String
B). String to Number
C). Boolean to String
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Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
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