Interview Prep

set_Timeout() Problem

What will the following program output? To know the reason behind this behaviour, you need to have a little knowledge about the JavaScript Execution Model (Event Loop). Code function guessOutput() { // declaration using `var` for (var i = 0; i < 10; i++) { // Web...

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Why are keys important for lists in React?

Keys provide a unique identifier to each item in the list. React uses keys to differentiate between elements and track their state. Keys are important for lists in React as they provide: Efficient Updates Unique Identification Stable Element Identity Performance...

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