Parangat Technologies Software Developer Interview Questions and Answers for Experienced

Q1. How to design a video streaming platform
Ans. 
Designing a video streaming platform involves considering scalability, user experience, content delivery, and security.
• Consider scalability by using a distributed architecture to handle large numbers of concurrent users.

• Focus on user experience with intuitive interfaces, personalized recommendations, and seamless playback.

• Implement content delivery networks (CDNs) to ensure fast and reliable streaming across different ...read more
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Q2. What is Single Page application
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Single Page Application is a web application that loads a single HTML page and dynamically updates the page as the user interacts with it.
• Loads a single HTML page initially

• Updates content dynamically without reloading the entire page

• Uses AJAX, JavaScript, and frameworks like Angular, React, or Vue.js

• Provides a seamless user experience similar to a desktop application
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Q3. What is Ajax calls?
Ans. 
Ajax calls are asynchronous HTTP requests made by the browser to the server without reloading the entire page.
• Ajax stands for Asynchronous JavaScript and XML

• Used to update parts of a web page without reloading the entire page

• Improves user experience by making the website more dynamic

• Commonly used in web applications to fetch data from a server

• Examples: fetching new emails in Gmail without refreshing the page, updating
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Q4. What are Content Delivery Networks?
Ans. 
Content Delivery Networks (CDNs) are distributed servers that help deliver web content efficiently to users based on their geographic location.
• CDNs cache content closer to users for faster delivery

• They help reduce latency and improve website performance

• Popular CDNs include Akamai, Cloudflare, and Amazon CloudFront
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Q1. In trend java questions
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Q1. Advance java questions, questions related to microservice and java 8
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Q1. Basic JS questions
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Q2. String Concat through function
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Advanced JS, PHP related questions

Q1. What is jdk, string related questions, basic java oops questions?
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Q1. What is Virtual DOM, Explain ?
Ans. 
Virtual DOM is a concept in web development where a lightweight copy of the actual DOM is created and manipulated for efficient rendering.
• Virtual DOM is an abstraction of the real DOM.

• It is used in frameworks like React to improve performance.

• Changes made to the virtual DOM are compared with the actual DOM, and only the necessary updates are applied.

• This approach reduces the number of direct manipulations on the actual...read more
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Q2. What is Higher Order Component ?
Ans. 
Higher Order Component is a function that takes a component and returns a new component with additional functionality.
• Higher Order Components (HOCs) are a pattern in React for reusing component logic.

• They are functions that accept a component and return a new component with enhanced capabilities.

• HOCs can be used for cross-cutting concerns like authentication, logging, or data fetching.

• They enable code reuse, compositio...read more
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Q3. Life Cycle Methods in React
Ans. 
Life Cycle Methods in React
• React components have several life cycle methods that are called at different stages of a component's life

• These methods allow developers to perform actions like initializing state, fetching data, and updating the UI

• Some commonly used life cycle methods are componentDidMount, componentDidUpdate, and componentWillUnmount
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Some maths related questions

Q1. Related to testing
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4 Coding Questions Were Given.
Check Palindrome String
Longest Increasing Subsequence
Group Anagrams
Add Two Numbers(Linked List)

Questions were picked from leetcode but the restriction of not using any inbuild function made them difficult to solve in the given time frame.

Q1. Basic Java Technical Questions
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Q2. Throws Vs Throw
Ans. 
Throws is used for checked exceptions in Java, while throw is used to explicitly throw an exception.
• Throws is used in method signature to declare that the method may throw a checked exception.

• Throw is used to actually throw an exception in the code.

• Example: public void method() throws IOException { //code }

• Example: throw new IOException();
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Q3. Method Overriding Basics and Output-Based Questions
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Q4. Springboot annotations
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Q5. Inheritance and Concept of Abstract Classes and Interfaces
Ans. 
Inheritance allows a class to inherit properties and behaviors from another class. Abstract classes cannot be instantiated and can have abstract methods. Interfaces define a contract for classes to implement.
• Inheritance allows a class to inherit properties and behaviors from another class

• Abstract classes cannot be instantiated and can have abstract methods

• Interfaces define a contract for classes to implement
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Had to brief about myself, my technical skills and projects. Few Technical questions regarding the tech stack and casual discussion.