HyScaler Full Stack Developer Interview Questions and Answers

Q1. What is difference between responsive and adaptive design ?
Ans. 
Responsive design adapts to different screen sizes, while adaptive design uses predefined layouts for specific screen sizes.
• Responsive design uses fluid grids and media queries to adjust layout based on screen size.

• Adaptive design uses multiple fixed layout sizes designed for specific screen sizes.

• Responsive design provides a more flexible and seamless user experience across various devices.

• Adaptive design may offer be...read more
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Q2. What is difference between Static and Dynamic website
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Static websites display the same content to all users, while dynamic websites can change content based on user interactions.
• Static websites are built using only HTML and CSS, with no server-side processing involved.

• Dynamic websites use server-side scripting languages like PHP, Python, or Ruby to generate content on the fly.

• Static websites are faster to load as they do not require server processing for each request.

• Dyna...read more
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Q3. What is javascript ?
Ans. 
JavaScript is a high-level, interpreted programming language used for creating interactive websites and web applications.
• JavaScript is a client-side scripting language that runs in the browser.

• It is used to add interactivity, animations, and dynamic content to websites.

• JavaScript can also be used on the server-side with Node.js.

• Commonly used for form validation, DOM manipulation, and AJAX requests.

• Example: document.get
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Q4. What is react js ?
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React JS is a JavaScript library for building user interfaces.
• React JS allows developers to create reusable UI components.

• It uses a virtual DOM for better performance by updating only the necessary parts of the actual DOM.

• React JS follows a unidirectional data flow, making it easier to manage state and props.

• It is commonly used in single-page applications and for building interactive web interfaces.
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Q5. What is promise in javascript ?
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Promise in JavaScript 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() to handle success and .catch() to handle errors.

• Example: const myPromise = new Promise((resolve, reject) => { ... });
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Q1. Linked list question to detect cycle
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Q2. Basic questions from JS
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Q1. Some questions related to my projects
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Q2. Some Questions related to my past experience
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Logical reasoning and Aptitude

Functions with Pointers and strings concepts

Q1. Mainly on Pointers and Dynamic Memory Allocation of 2-D Array
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Q2. Structure Padding and Packing
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Basic c# .net questions

Q1. Experience in domains
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Q2. Previous companies
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Q1. SQL basic questions
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Q2. .net and OOP basics
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1 round is coding round in pan paper test atleast 5 coding questions and some multiple questions and 1 DSA questions and 4 coding questions correct and dsa correct than interview

Q1. What are oops concepts in java, explain real time scenario
Ans. 
OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
Ans. 
SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
Ans. 
Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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