PayPay Corporation Front end Engineer Interview Questions and Answers

Standard quantitative questions accompanied by logical reasoning and related topics.

Q1. Asked about my projects.
Add your answer
Q2. What are the basic Object-Oriented Programming (OOP) concepts, including polymorphism and inheritance?
Ans. 
OOP concepts include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hides complex implementation details and only shows the necessa
Answered by AI
Add your answer
Q3. Can you explain React, how it functions, and the related concepts?
Ans. 
React is a JavaScript library for building user interfaces.
• React allows developers to create reusable UI components.

• It uses a virtual DOM for efficient rendering.

• React uses a declarative approach to define how the UI should look based on the application state.

• It supports server-side rendering for improved performance.

• React can be used with other libraries like Redux for state management.
Answered by AI
Add your answer
Q4. About my final year project and how would you improve it?
Add your answer

Q1. Can you introduce yourself and provide some information about your family?
Ans. 
I am a software engineer with a passion for coding and problem-solving. I come from a close-knit family with supportive parents and siblings.
• Software engineer with coding and problem-solving skills

• Close-knit family with supportive parents and siblings
Answered by AI
Add your answer
Q2. What are your strengths and weaknesses, and how are you addressing your weaknesses?
Ans. 
My strengths include problem-solving and teamwork, while my weaknesses are time management and public speaking. I am addressing my weaknesses by taking time management courses and practicing public speaking.
• Strengths: problem-solving, teamwork

• Weaknesses: time management, public speaking

• Addressing weaknesses: taking time management courses, practicing public speaking
Answered by AI
Add your answer

Q1. Can you tell me about yourself?
Ans. 
I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies

• Passionate about software engineering
Answered by AI
Add your answer
Q2. Can you explain one of the projects you completed during the academic year?
Ans. 
Developed a web-based student management system for tracking attendance and grades.
• Used HTML, CSS, and JavaScript for front-end development.

• Implemented backend functionality using PHP and MySQL database.

• Incorporated user authentication and authorization features for secure access.

• Tested the system thoroughly to ensure functionality and user-friendliness.
Answered by AI
Add your answer
Q3. What were some of the fundamental concepts of Artificial Intelligence that the interviewer inquired about during your interview as a Computer Science and Engineering - Artificial Intelligence and Machine L...read more
Add your answer
Q4. What were your Achievements in the graduation years
Ans. 
Graduated with honors, completed multiple internships, and won coding competitions
• Graduated with honors in Computer Science

• Completed internships at XYZ Company and ABC Corporation

• Won first place in coding competition at university hackathon
Answered by AI
Add your answer

Q1. Css flexbox and grid
Add your answer
Q2. Pagination on scroll
Ans. 
Implementing pagination on scroll allows for loading more content as the user reaches the bottom of the page.
• Use a scroll event listener to detect when the user has reached the bottom of the page

• Make an API call to fetch more data when the bottom is reached

• Append the new data to the existing content on the page
Answered by AI
Add your answer
Q3. Immediately invoked fn and anonymous fn
Ans. 
Immediately invoked function expressions (IIFE) are functions that are executed immediately after they are created.
• IIFE is defined and invoked at the same time using parentheses at the end of the function declaration.

• Anonymous functions do not have a name and can be used as IIFE by wrapping them in parentheses.

• IIFE is commonly used to create a private scope for variables and functions.
Answered by AI
Add your answer
Q4. What are closures
Ans. 
Closures are functions that have access to variables from their outer scope even after the outer function has finished executing.
• Closures allow functions to access variables from their parent function even after the parent function has returned

• They help in creating private variables and functions in JavaScript

• Closures are commonly used in event handlers and callbacks
Answered by AI
Add your answer
Q5. What is promise? explain
Ans. 
A promise is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() method to handle success and failure callbacks.

• Example: Fetch API returns a promise when making an HTTP request.
Answered by AI
Add your answer
Q6. What is lazy loading -explain
Ans. 
Lazy loading is a technique used in web development to defer loading non-essential resources until they are needed.
• Lazy loading helps improve page load times by only loading resources when they are required.

• It is commonly used for images, videos, and other media files on a webpage.

• Lazy loading can be implemented using JavaScript libraries like Intersection Observer or by using native browser features like loading='lazy
Answered by AI
Add your answer
Q7. Media query and css selectors
Add your answer

It was good I gave my best

Difficult it much to learn

Q1. Code explaining recursions
Add your answer
Q2. Functions how does they work
Add your answer
Q3. Projects and their explanation howdidtgey work
Add your answer

Q1. SQL operationg systems
Add your answer
Q2. Tools and their usages
Add your answer

A wide range of questions were asked including concepts like logical reasoning, CN, DBMS, SQL, OS, Data structures followed by very basic coding questions.

Q1. Introduce yourself with your academic details
Add your answer
Q2. Elaborate your projects
Add your answer
Q3. What is SDLC and elaborate it?
Ans. 
SDLC stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software.
• SDLC is a systematic process for building software applications.

• It consists of several phases such as planning, analysis, design, implementation, testing, and maintenance.

• Each phase has its own set of activities and deliverables.

• Examples of SDLC models include Waterfa...read more
Answered by AI
Add your answer
Q4. Some scenario and logic based questions along with technical were asked
Add your answer

Q1. What do you know about LTIMindtree?
Ans. 
LTIMindtree is a global technology consulting and services company specializing in digital transformation and IT services.
• LTIMindtree was formed through the merger of LTI (Larsen & Toubro Infotech) and Mindtree in 2019.

• It offers services in areas such as cloud computing, data analytics, cybersecurity, and artificial intelligence.

• LTIMindtree serves clients in various industries including banking, healthcare, retail, and...read more
Answered by AI
Add your answer
Q2. Why should we take you?
Add your answer
Q3. Where do you see yourself in next 5-10 years?
Add your answer

Q1. Can you tell me about yourself?
Add your answer
Q2. What was your role and contributions in your projects?
Add your answer
Q3. Are you willing to relocate?
Add your answer

Aptitude round
English exam
Maths tricky questions exam
Coding 1 easy 1 tuff

Q1. Difference between css and css3
Add your answer
Q2. Tell disadvantages of your projects
Add your answer

Q1. Are you okay for night shift
Add your answer
Q2. Are you okay with reallocation
Add your answer