JavaScript Interview Questions and Answers

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How to detect if a function is called as constructor in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you check an object is a promise or not Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is a Proper Tail Call in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you make an object iterable in javascript ?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is deno in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you prevent promises swallowing errors in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is an async function in javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the difference between function and class declarations in javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is an observable in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the easiest way to resize an array in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is a Short circuit condition in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the difference between Function constructor and function declaration in javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What are the common use cases of observables in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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Is Node.js completely single threaded in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you detect primitive or non primitive value type in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the difference between shim and polyfill in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is a microTask queue in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is an event table in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is heap in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What are the differences between promises and observables in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you use javascript libraries in typescript file in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the purpose of queueMicrotask in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What is the easiest multi condition checking in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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How do you flattening multi dimensional arrays in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What are different event loops in Javascript?

asked Oct 22, 2023 in JavaScript by DavidAnderson

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What is microtask in Javascript?

asked Oct 22, 2023 in JavaScript by DavidAnderson

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What are tasks in event loop in Javascript?

asked Oct 22, 2023 in JavaScript by DavidAnderson

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How do you implement zero timeout in modern browsers?

asked Oct 22, 2023 in JavaScript by DavidAnderson

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What is minimum timeout throttling in Javascript?

asked Oct 22, 2023 in JavaScript by DavidAnderson

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