Answer & Solution
Answer: Option A
Solution:
JavaScript converts the number 3 to the string '3' and concatenates it with '5', resulting in '35'.
Q
Which type conversion happens automatically in the expression 3 + '5'?
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
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
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 be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
What is the type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined
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
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 the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}