JS Quiz Full

What is the correct way to declare a variable in JavaScript?

• Using the 'function' keyword followed by the variable name

• Using the 'if' keyword followed by the variable name

• Using the 'let', 'const', or 'var' keyword followed by the variable name

• Using the 'print' keyword followed by the variable name

How do you write a single line comment in JavaScript?

• #

• /*

• //

• ${}

map() will always return an array

• True

• False

• neither True nor False

• Both True and False

Choose the option which is not an array method

• push()

• splice()

• pop()

• None of the above

How do you add a new element (5) to an existing array in JavaScript?

• array.insert(5)

• array.append(5)

• array.add(5)

• array.push(5)

let arr = [1,2,3,4]
Find the number of elements in arr

• arr.length()

• arr.length

• length = arr

• length(arr)

How do you access a property of an object in JavaScript?

• By using dot notation or bracket notation

• By using arrow notation

• By using semicolon notation

• By using comma notation

Another name of Function scope is

• Block scope

• Local scope

• Object scope

• None of the above

What is passed as the argument to the filter() method?

• callback function

• number

• Higher order function

• All the above

_____ is used to give alias name in destructuring

• =

• :

• {}

• None of the above