Answer & Solution
Answer: Option A
Solution:
The true boolean is coerced to the number 1, resulting in the sum 6, which is a number.
Q
In JavaScript, what will be the type of a variable x after x = 5 + true;?
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
What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What will typeof NaN return in JavaScript?
A). number
B). NaN
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 will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
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 is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object
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 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