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JavaScript & TypeScript Quiz Questions
A sample of the 10 questions below — instant scoring and an explanation for every answer. No sign-in required to play.
Question 1
What keyword declares a block-scoped variable in JavaScript?
Alet
Bvar
Cfunction
Dglobal
Question 2
What does a Promise represent in JavaScript?
AA synchronous function
BThe eventual completion (or failure) of an asynchronous operation
CA CSS style
DA type of loop
Question 3
What does the `===` operator check in JavaScript?
ABoth value and type
BType only
CNeither
DValue only
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