JS Recap

[Beginner] Which keyword creates a mutable block-scoped variable in JavaScript?

• var
• const
• let
• static

[Beginner] Which operator checks value AND type equality?

• ==
• ===
• !=
• =

[Beginner] What does typeof null return?

• object
• null
• undefined
• number

[Beginner] Which array method adds an element to the end of an array?

• shift()
• push()
• unshift()
• pop()

[Beginner] What characters are used to create a template literal?

• 'quotes'
• quotes
• backticks (`)
• angle brackets

[Beginner] Which built-in object provides random() and floor() methods?

• Date
• Math
• Number
• Object

[Beginner] Which DOM method returns the first element matching a selector?

• querySelector()
• querySelectorAll()
• getElementById()
• getElementsByClassName()

[Beginner] Which method converts a JSON string to a JavaScript object?

• JSON.parse()
• JSON.stringify()
• JSON.toObject()
• Object.fromJSON()

[Beginner] What will console.log(2 + '2') output?

• 4
• NaN
• 22
• 2 + 2

[Intermediate] What is hoisting in JavaScript?

• Moving loops to the top
• Moving functions and variables to the top
• Delaying code execution
• Removing unused variables