UI Technical Lead

UI Technical Lead Interview Questions and Answers

Updated 12 Sep 2024

Q1. Click counter in react

Ans.

Implement a click counter in React

  • Create a state variable to store the count

  • Increment the count when a button is clicked

  • Display the count in the UI

Q2. Event emitter using javascript

Ans.

Event emitter in JavaScript allows objects to subscribe and listen for events.

  • Event emitter is a design pattern where an object (the emitter) maintains a list of listeners and notifies them of events.

  • Listeners can subscribe to specific events and execute a callback function when the event is emitted.

  • Example: const emitter = new EventEmitter(); emitter.on('event', () => { console.log('Event emitted!'); }); emitter.emit('event');

  • EventEmitter is a built-in module in Node.js that...read more

Q3. Define concepts of OOPS

Ans.

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

  • OOPS focuses on creating objects that contain data and methods to manipulate that data.

  • Encapsulation is the concept of bundling data and methods that operate on the data within a single unit, called an object.

  • Inheritance allows one class to inherit properties and behavior from another class.

  • Polymorphism allows objects to be treated as instances of their parent clas...read more

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