Q171. What is the purpose of queueMicrotask?
The `queueMicrotask` function is used to schedule a microtask, which is a function that will be executed asynchronously in the microtask queue. The purpose of `queueMicro...
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Q172. What is a microTask queue?
Microtask Queue is the new queue where all the tasks initiated by promise objects get processed before the callback queue. The microtasks queue are processed before the n...
Q173. What is a Proper Tail Call?
First, we should know about tail call before talking about "Proper Tail Call". A tail call is a subroutine or function call performed as the final action of a calling fun...
Q174. What are the possible reasons for memory leaks?
Memory leaks can lead to poor performance, slow loading times and even crashes in web applications. Some of the common causes of memory leaks are listed below, 1. The exe...
Q175. What are the optimization techniques of V8 engine?
V8 engine uses the below optimization techniques. 1. **Inline expansion:** It is a compiler optimization by replacing the function calls with the corresponding function b...
Q176. What are generator functions and how do they work?
Generator functions are special functions that can pause execution and resume later, allowing them to produce a sequence of values over time instead of computing them all...
Q177. What is tail call optimization and does JavaScript support it?
Tail call optimization (TCO) is a technique where a function call in tail position (the last operation before returning) reuses the current stack frame instead of creatin...
Q178. What are the differences between SharedArrayBuffer and ArrayBuffer?
SharedArrayBuffer and ArrayBuffer are both fixed-length binary data buffers, but SharedArrayBuffer allows sharing memory between multiple workers/threads. **ArrayBuffer (...
Q179. How do you prevent prototype pollution attacks in JavaScript?
Prototype pollution is a security vulnerability where attackers inject properties into Object.prototype, affecting all objects in the application. **Vulnerable code:** ``...
Q180. What is the Atomics API and when should it be used?
The Atomics API provides atomic operations on SharedArrayBuffer, ensuring thread-safe access to shared memory in multi-threaded JavaScript (workers). **Basic atomic opera...