Wipro UI Developer Interview Questions and Answers

Q1. JAVAscript related,es6 api calls
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Q2. UI related css html questitions
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Javscript oop related coding

Q1. What's your father do..
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My father is a software engineer who works for a tech company.
• Father is a software engineer

• Works for a tech company
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Q2. Tell me family details
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This is coding + mcq question

Q1. What is react class based conponent?
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Q2. What is mixins?
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Q3. What are react lifecycles?
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Excellent and test related which we worked technology only

Q1. What is different between react and angular?
Ans. 
React is a JavaScript library for building user interfaces, while Angular is a full-fledged framework for web development.
• React is a library, while Angular is a framework.

• React uses a virtual DOM for better performance, while Angular uses a regular DOM.

• React is more flexible and allows developers to choose their own tools and libraries, while Angular has a more opinionated structure.

• React is mainly focused on the view ...read more
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Q2. What is props drilling and higher order component in react. ?
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Props drilling is passing props through multiple levels of components. Higher order component is a function that takes a component and returns a new component.
• Props drilling involves passing props from a parent component to a deeply nested child component, which can lead to prop pollution and make the code harder to maintain.

• Higher order component is a pattern where a function takes a component and returns a new compon...read more
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Q1. Previous projects domain
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Q2. What is role of previous company and some questions related to previous projects
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Q1. WHat is event loop?
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Event loop is a mechanism in JavaScript that allows for asynchronous operations to be executed in a non-blocking way.
• Event loop is responsible for handling asynchronous operations in JavaScript.

• It allows for non-blocking execution of code by continuously checking the call stack and the task queue.

• When the call stack is empty, the event loop moves tasks from the task queue to the call stack for execution.

• Example: setTim...read more
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Q2. What is DOM ?
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DOM stands for Document Object Model, a programming interface for web documents.
• DOM is a tree-like structure that represents the elements of a web page.

• It allows developers to manipulate the content, structure, and style of a web page using scripting languages like JavaScript.

• DOM provides methods and properties to interact with HTML elements, such as selecting, adding, removing, or modifying them.

• Example: document.getE...read more
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Q1. React virtual dom, how it works
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React virtual DOM is a lightweight copy of the actual DOM, which allows React to efficiently update and render components.
• React creates a virtual DOM tree that mirrors the actual DOM.

• When changes occur, React compares the virtual DOM with the previous version to identify the minimal updates needed.

• React then updates the virtual DOM and efficiently applies the changes to the actual DOM.

• This process helps in optimizing p...read more
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Q2. Explain redux, and flow
Ans. 
Redux is a predictable state container for JavaScript apps. Flow is a static type checker for JavaScript.
• Redux is a state management library for JavaScript applications.

• It helps in managing the state of an application in a predictable way.

• It follows a unidirectional data flow pattern.

• Flow is a static type checker for JavaScript that helps in catching errors before runtime.

• It helps in improving the quality of code and r
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Q1. Explain unit testing
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Unit testing is a software testing technique where individual units or components of a software application are tested in isolation from the rest of the application.
• Unit testing is done to ensure that each unit of the software application is working as expected.

• It helps in identifying and fixing bugs early in the development cycle.

• Unit tests are automated and can be run frequently to ensure that changes made to the cod...read more
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Q2. Explain routing in react
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Routing in React is the process of navigating between different components or pages based on the URL.
• React Router is a popular library for handling routing in React

• It allows for declarative routing with components and URLs

• Routes can be defined with parameters and nested routes

• Navigation can be done with Link and NavLink components

• Programmatic navigation can be done with the useHistory hook
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