Q2271. Why is Redux Toolkit recommended over Redux?
**Redux Toolkit (RTK)** is the official, opinionated way to write Redux logic today. It's built on top of plain Redux and re-exports its APIs, but wraps them with utiliti...
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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 (2,728 available).
Q2272. Why Python (CPython and others) uses the GIL?
In CPython, the global interpreter lock, or GIL, is a mutex that prevents multiple native threads from executing Python bytecodes at once. This lock is necessary mainly b...
Q2273. Can I avoid using postMessages completely?
You cannot avoid using postMessages completely(or 100%). Even though your application doesn’t use postMessage considering the risks, a lot of third party scripts use post...
Q2274. What is the difference between client state and server state?
**Client state** is data that lives entirely in the browser and is owned by the UI — it doesn't need to be synchronized with a backend. **Server state** is data that actu...
Q2275. How are arguments passed by value or by reference in Python?
Pass by value: Copy of the actual object is passed. Changing the value of the copy of the object will not change the value of the original object. Pass by reference: Refe...
Q2276. Is postMessages synchronous?
The postMessages are synchronous in IE8 browser but they are asynchronous in IE9 and all other modern browsers (i.e, IE9+, Firefox, Chrome, Safari).Due to this asynchrono...
Q2277. How do you prevent unnecessary Redux re-renders?
By default, `useSelector` re-renders a component whenever the **selected value's reference** changes between renders (it uses strict `===` comparison). Most unnecessary r...
Q2278. What is a boolean in Python?
Boolean is one of the built-in data types in Python, it mainly contains two values, and they are true and false. Python bool() is the method used to convert a value to a ...
Q2279. What paradigm is Javascript?
JavaScript is a multi-paradigm language, supporting imperative/procedural programming, Object-Oriented Programming and functional programming. JavaScript supports Object-...
Q2280. What is `createSelector`?
`createSelector` (from **Reselect**, which Redux Toolkit re-exports) creates **memoized selectors**. It takes one or more "input selectors" and a "result function", and o...