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
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
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 typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
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 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 the following code: let z = '123'; z = Number(z); console.log(typeof z);?
A). string
B). number
C). undefined
D). boolean
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
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 type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined