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Mad Street Den Full Stack Developer Interview Questions and Answers
9 Interview questions
Designing the database for Slack
Create tables for users, channels, messages, and teams
Use foreign keys to establish relationships between tables
Include columns for user details, channel details, message content, and timestamps
Consider indexing frequently queried columns for performance optimization
JS hoisting is a mechanism where variable and function declarations are moved to the top of their scope during compilation.
Variable declarations are hoisted but not their initializations.
Function declarations are fully hoisted, including their definitions.
Hoisting can lead to unexpected behavior if not understood properly.
Example: console.log(x); var x = 5; // Output: undefined
Closure is a feature in programming languages that allows a function to access variables from its outer scope even after it has finished executing.
Closure is created when a nested function references variables from its parent function.
It allows for data encapsulation and privacy in JavaScript.
Closures are commonly used in event handlers, callbacks, and asynchronous programming.
They can be used to create private va...
To improve db performance, optimize queries, use indexing, cache data, and scale horizontally.
Optimize queries by using appropriate indexes and avoiding unnecessary joins
Cache frequently accessed data to reduce database load
Scale horizontally by distributing the database across multiple servers
Use database monitoring tools to identify and resolve performance bottlenecks
To improve API latency, optimize database queries, use caching, implement load balancing, and optimize code.
Optimize database queries by using indexes, reducing unnecessary joins, and optimizing query execution plans.
Implement caching to store frequently accessed data in memory, reducing the need for repeated database queries.
Use load balancing to distribute incoming requests across multiple servers, preventing an...
React has several component lifecycles, including mounting, updating, and unmounting.
Mounting: when a component is being created and inserted into the DOM
Updating: when a component is being re-rendered due to changes in props or state
Unmounting: when a component is being removed from the DOM
CSS position properties determine how an element is positioned on a web page.
static: default position, elements flow in document order
relative: positioned relative to its normal position
absolute: positioned relative to its nearest positioned ancestor
fixed: positioned relative to the browser window
sticky: positioned based on scroll position
Ref is used in React to access and manipulate the DOM directly.
Ref provides a way to access and modify DOM elements or React components.
It is commonly used for focusing input fields, triggering animations, or integrating with third-party libraries.
Ref can be created using the useRef() hook or by using the ref attribute in class components.
Example: const inputRef = useRef();
Example: const b...
CDN stands for Content Delivery Network. It is a distributed network of servers that helps deliver web content efficiently.
CDN improves website performance by caching content closer to the user
It reduces latency and improves page load times
CDN helps handle high traffic loads and prevents server overload
It provides global coverage and ensures content availability worldwide
CDN can deliver various types of content li...
Mad Street Den Full Stack Developer Interview Experiences
1 interview found
Selected
I applied via Company Website and was interviewed before Feb 2023. There were 4 interview rounds.
(3 Questions)
- Q1. What is closure
- Ans.
Closure is a feature in programming languages that allows a function to access variables from its outer scope even after it has finished executing.
Closure is created when a nested function references variables from its parent function.
It allows for data encapsulation and privacy in JavaScript.
Closures are commonly used in event handlers, callbacks, and asynchronous programming.
They can be used to create private variabl...
- Q2. How JS handles hoisting
- Ans.
JS hoisting is a mechanism where variable and function declarations are moved to the top of their scope during compilation.
Variable declarations are hoisted but not their initializations.
Function declarations are fully hoisted, including their definitions.
Hoisting can lead to unexpected behavior if not understood properly.
Example: console.log(x); var x = 5; // Output: undefined
- Q3. What are the different CSS position properties
- Ans.
CSS position properties determine how an element is positioned on a web page.
static: default position, elements flow in document order
relative: positioned relative to its normal position
absolute: positioned relative to its nearest positioned ancestor
fixed: positioned relative to the browser window
sticky: positioned based on scroll position
(2 Questions)
- Q1. What are the different component lifecycles in react
- Ans.
React has several component lifecycles, including mounting, updating, and unmounting.
Mounting: when a component is being created and inserted into the DOM
Updating: when a component is being re-rendered due to changes in props or state
Unmounting: when a component is being removed from the DOM
- Q2. What is the use of ref in react
- Ans.
Ref is used in React to access and manipulate the DOM directly.
Ref provides a way to access and modify DOM elements or React components.
It is commonly used for focusing input fields, triggering animations, or integrating with third-party libraries.
Ref can be created using the useRef() hook or by using the ref attribute in class components.
Example: const inputRef = useRef();
Example: const button...
(2 Questions)
- Q1. Design the DB for slack
- Ans.
Designing the database for Slack
Create tables for users, channels, messages, and teams
Use foreign keys to establish relationships between tables
Include columns for user details, channel details, message content, and timestamps
Consider indexing frequently queried columns for performance optimization
- Q2. How will you improve the db performanc
- Ans.
To improve db performance, optimize queries, use indexing, cache data, and scale horizontally.
Optimize queries by using appropriate indexes and avoiding unnecessary joins
Cache frequently accessed data to reduce database load
Scale horizontally by distributing the database across multiple servers
Use database monitoring tools to identify and resolve performance bottlenecks
(3 Questions)
- Q1. Explain the projects that you worked on
- Q2. What is CDN and list its uses
- Ans.
CDN stands for Content Delivery Network. It is a distributed network of servers that helps deliver web content efficiently.
CDN improves website performance by caching content closer to the user
It reduces latency and improves page load times
CDN helps handle high traffic loads and prevents server overload
It provides global coverage and ensures content availability worldwide
CDN can deliver various types of content like im...
- Q3. How will improve the api latency of a system
- Ans.
To improve API latency, optimize database queries, use caching, implement load balancing, and optimize code.
Optimize database queries by using indexes, reducing unnecessary joins, and optimizing query execution plans.
Implement caching to store frequently accessed data in memory, reducing the need for repeated database queries.
Use load balancing to distribute incoming requests across multiple servers, preventing any sin...
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Full Stack Developer Interview Questions & Answers
Myrsa Technology Solutions
Anonymous
posted on 11 Jul 2022
I applied via Campus Placement
(1 Question)
- Q1. They questioned me about backend-to-front-end connections.
(1 Question)
- Q1. We discussed the fundamentals like my experience, resume, my future plans, and then the compensation package.
Interview Preparation Tips
Create a hero section for website
Selected
I appeared for an interview in Nov 2024, where I was asked the following questions.
- Q1. Brief our resume
- Ans.
Experienced software developer with a strong background in full-stack development and a passion for innovative solutions.
Proficient in languages such as JavaScript, Python, and Java, with experience in frameworks like React and Django.
Developed a web application for e-commerce that increased sales by 30% through improved user experience and performance.
Collaborated with cross-functional teams to design and implement RE...
- Q2. Describe expertise
- Ans.
Expertise refers to a high level of knowledge or skill in a particular area, often gained through experience and education.
Deep understanding of programming languages like Python and Java, enabling efficient problem-solving.
Experience in developing scalable web applications, such as an e-commerce platform using React and Node.js.
Proficiency in database management, demonstrated by optimizing SQL queries for a large-scal...
Selected
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. Can you explain your previous projects?
- Ans.
I worked on several projects, including a web app for task management and a mobile app for fitness tracking.
Developed a task management web app using React and Node.js, enabling users to create, update, and delete tasks.
Created a mobile fitness tracking app with Flutter, allowing users to log workouts and track progress over time.
Implemented RESTful APIs for both projects to facilitate data exchange between the fronten...
- Q2. Where do you envision yourself in five years?
- Ans.
In five years, I see myself as a senior software developer, leading projects and mentoring junior developers in a dynamic tech environment.
Leadership Role: I aim to take on a leadership position, guiding a team of developers in delivering high-quality software solutions.
Mentorship: I want to mentor junior developers, sharing my knowledge and helping them grow their skills through code reviews and pair programming.
Conti...
Selected
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. Can you provide a brief overview of your resume?
- Ans.
I am a Java Full Stack Developer with experience in building scalable web applications and a strong foundation in software engineering.
Full Stack Development: Proficient in both front-end and back-end technologies, including Java, Spring Boot, and React.
Database Management: Experienced in working with SQL databases like MySQL and NoSQL databases like MongoDB for data storage and retrieval.
API Development: Developed RES...
- Q2. Can you elaborate on your previous projects?
Software Developer Interview Questions & Answers
Abhinav IT Solutions
Anonymous
posted on 3 Aug 2022
I applied via Recruitment Consulltant and was interviewed before Aug 2021. There were 2 interview rounds.
Hospital management syatem
Check the coding and databases connection and validations
Interview Preparation Tips
(1 Question)
- Q1. Asked about the previous job experience and area of interest like frontend or backend
Coding test was on reactjs and html
(1 Question)
- Q1. Asked about all the react concepts in detail
(1 Question)
- Q1. Javascript basics were asked
Software Developer Interview Questions & Answers
Panorbit Services LLP
Anonymous
posted on 22 Sep 2024
Selected
Desgining of backend services
- Q1. What are some key considerations for designing RESTful APIs and how do you handle error response in Node.js?
- Ans.
Key considerations for RESTful API design include resource identification, statelessness, and error handling strategies.
Use meaningful resource URIs (e.g., /users, /products).
Implement HTTP methods correctly: GET for retrieval, POST for creation, PUT for updates, DELETE for removal.
Ensure statelessness: each request should contain all necessary information.
Use appropriate status codes (e.g., 200 for success, 404 for no...
- Q2. How would you design a scalable backend architecture for a learning management system with millions of users, ensuring performance, reliability and data security?
- Ans.
Designing a scalable backend for a learning management system requires careful planning for performance, reliability, and security.
Use microservices architecture to allow independent scaling of components like user management, course content, and analytics.
Implement load balancers to distribute traffic evenly across servers, ensuring no single point of failure.
Utilize a cloud provider (e.g., AWS, Azure) for auto-scalin...
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