Q681. What is the purpose of EvalError object?
The EvalError object indicates an error regarding the global `eval()` function. Even though this exception is not thrown by JavaScript anymore, the EvalError object remai...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (1,100 available).
Active:
Tag: javascript ×
Q682. How do you handle race conditions in Redux?
A race condition happens when multiple async requests are in flight and they **resolve out of order** — e.g., a user types quickly in a search box, an older request for "...
Q683. What are the list of cases error thrown from non-strict mode to strict mode?
When you apply 'use strict'; syntax, some of the below cases will throw a SyntaxError before executing the script 1. When you use Octal syntax ```javascript var n = 022; ...
Q684. How do you persist Redux state?
**`redux-persist`** is the standard library for persisting and rehydrating a Redux store across page reloads/app restarts. It wraps your root reducer so selected slices a...
Q685. Do all objects have prototypes?
No. All objects have prototypes except two exceptions: * **Object.prototype** itself — This is the base object in the prototype chain, and **its prototype is** `null`. * ...
Q686. How do you debug a Redux performance problem?
A practical, step-by-step approach: 1. **Confirm it's actually Redux**: use the React DevTools **Profiler** to see which components re-render and how often, before assumi...
Q687. What is the difference between a parameter and an argument?
Parameter is the variable name of a function definition whereas an argument represents the value given to a function when it is invoked. Let's explain this with a simple ...
Q688. What should be stored in Redux vs derived with selectors?
A common mistake is storing **computed/derived values** in Redux state itself, which then has to be kept in sync manually every time the source data changes. The rule of ...
Q689. What is the purpose of some method in arrays?
The some() method is used to test whether at least one element in the array passes the test implemented by the provided function. The method returns a boolean value. Let'...
Q690. Would you put all API data into Redux?
**No** — not by default. Server data (see [client state vs server state](#what-is-the-difference-between-client-state-and-server-state)) has different needs than plain cl...