What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
What will typeof NaN return in JavaScript?
A). number
B). NaN
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 result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
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 is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined
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 is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object