Q111. Explain ROC-AUC and when it can be misleading.
ROC-AUC is the probability that a randomly chosen positive example is ranked above a randomly chosen negative one. It summarizes performance across all thresholds, and 0....
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Q112. How would you design a recommendation system end to end?
Start with the objective and data: implicit signals such as views, clicks and purchases, plus explicit ratings and item or user features. A common two-stage design: - Can...
Q113. What is the currying function?
**Currying** is the process of transforming a function with **multiple arguments** into a sequence of **nested functions**, each accepting **only one argument** at a time...
Q114. What is React Fiber?
**React Fiber** is the **new reconciliation engine** in React, introduced in React 16. It’s a complete rewrite of React’s core algorithm(old stack-based algorithm) for re...
Q115. What is the main goal of React Fiber?
The goal of _React Fiber_ is to increase its suitability for areas like animation, layout, and gestures. Its headline feature is **incremental rendering**: the ability to...
Q116. What is mixins in TypeScript?
In TypeScript, mixins allow you to extend a class by combining the properties and methods from other classes. They provide a way to reuse code across multiple classes wit...
Q117. What is declaration merging in TypeScript?
Declaration merging in TypeScript lets you combine multiple declarations with the same name into a single declaration. It allows you to add or extend properties, methods,...
Q118. What are decorators in TypeScript?
Decorators in TypeScript allows us to add metadata or behavior to classes, methods, properties, or parameters at design time. They are declared using the @ symbol followe...
Q119. How do you configure Webpack in Next.js?
By adding a custom webpack configuration in next.config.js. ```js module.exports = { webpack: ( config, { buildId, dev, isServer, defaultLoaders, webpack } ) => { // Note...
Q120. How do you configure a custom Babel setup in Next.js?
By default, Next.js uses the high-performance Rust-based **SWC compiler**, which is up to 17x faster than Babel. However, if your project relies on legacy custom Babel pl...