Senior full stack developer

Interview Questions (171)

Q1Explain the difference between responsive design and adaptive design.
Technical
Q2What do you mean by data attributes?
Technical
Q3What is a web server?
Technical
Q4What is the difference between a static and dynamic website?
Technical
Q5How do you ensure code quality and maintainability in your projects?
Technical
Q6What are the latest full-stack development trends?
Technical
Q7How do you select the tools and technologies for a project?
Technical
Q8Why is RESTful API a popular choice in web development?
Technical
Q9Can you explain the MVC design pattern?
Technical
Q10Explain long polling.
Technical
Q11Which is the popular language used by full-stack developers?
Technical
Q12What is type coercion in JavaScript?
Technical
Q13What are the duties of a full-stack programmer?
Experience
Q14What are the advantages of using Python language?
Technical
Q15What are the advantages of using unit testing?
Technical
Q16How do you ensure data security in your applications?
Technical
Q17What's the difference between unit test and integration test?
Technical
Q18Can you explain the concept of microservices architecture?
Technical
Q19What is the box model in CSS?
Technical
Q20What is lazy loading in angular?
Technical
Q21Which technologies and skills do you need to develop a project from scratch?
Experience
Q22What is the extract function in PHP?
Technical
Q23How do we use the alt attribute on images?
Technical
Q24Distinguish between Hashtable and HashMap.
Technical
Q25What is a Java Applet?
Technical
Q26What is "Scope" in AngularJS?
Technical
Q27What is WebP?
Technical
Q28What is "State" in React?
Technical
Q29What is jQuery, and what are its features?
Technical
Q30What is namespace in C#?
Technical
Q31What is hoisting in JavaScript?
Technical
Q32What is backtracking, and why do we use it?
Technical
Q33What is double brace initialization, and what are its advantages?
Technical
Q34What is the difference between the “SendRedirect” and the “Forward” method in Java?
Technical
Q35What is a JavaScript Promise, and what are its different states?
Technical
Q36What is a Request Dispatcher?
Technical
Q37What are the applications of Python?
Technical
Q38What are the differences between static and volatile variables in Java?
Technical
Q39What is the difference between MVC (Model View Controller) and MVP (Model View Presenter)?
Technical
Q40What do you mean by MEAN Stack?
Technical
Q41What areas of the stack should I focus on when preparing for an interview?
Situational
Q42How do you test full-stack developers during the interview process?
Reverse
Q43What does success look like for a full-stack developer in your company?
Reverse
Q44Can you describe the balance between front-end and back-end work in this role?
Reverse
Q45What kind of portfolio do you expect from a full-stack developer?
Reverse
Q46How important is specialization versus being a generalist in your company?
Reverse
Q47Explain the JavaScript event loop. Then tell me about a time you hit a real problem caused by event loop behavior.
Technical
Q48You’re building a React component that needs to fetch data on mount and re-fetch when a user ID prop changes. Walk me through the implementation and the cleanup.
Technical
Q49Have you worked with React Server Components? Walk me through where they fit and what you can and can’t do in one.
Technical
Q50What’s the difference between useCallback and useMemo? When do you reach for each?
Technical
Q51Design a REST API for a multi-tenant SaaS application. How do you handle tenant isolation at the data layer?
Technical
Q52You have a PostgreSQL table with 50 million rows and a query running in 8 seconds. Walk me through the optimization.
Technical
Q53Walk me through how you’d implement JWT authentication in a Node.js API. Include where tokens are stored and what you’d do differently for a high-security context.
Technical
Q54Design a real-time collaborative editing feature for a document application. Walk through every layer of the stack.
Situational
Q55You’re building a content platform. Posts have images and video. Users expect near-instant page loads. Walk through your architecture.
Situational
Q56You’re adding a feature to a checkout flow that involves three API calls in sequence. How do you test it?
Technical
Q57Walk me through the architecture of the last production application you built or owned. What would you change now that you couldn’t change then?
Experience
Q58Tell me about the worst bug you introduced in production. What did it affect, how did you find it, and what happened next?
Behavioral
Q59What is full-stack development?
Technical
Q60Explain the difference between client-side and server-side programming.
Technical
Q61What is the purpose of HTML, CSS, and JavaScript in web development?
Technical
Q62What is a REST API, and why is it used?
Technical
Q63Explain the difference between GET and POST HTTP methods.
Technical
Q64How do you include CSS in an HTML document?
Technical
Q65What is the purpose of the div and span tags in HTML?
Technical
Q66What are CSS selectors, and can you name a few types?
Technical
Q67How does JavaScript manipulate the DOM?
Technical
Q68What is difference between == and === in JavaScript?
Technical
Q69What is the difference between relational and non-relational databases?
Technical
Q70How would you implement user authentication in a web application?
Technical
Q71What is the purpose of package.json in a Node.js project?
Technical
Q72How would you connect a Node.js application to a database and perform basic CRUD operations?
Technical
Q73What are environment variables, and how are they used?
Technical
Q74Explain the concept of responsive design. How would you implement it?
Technical
Q75What is the difference between CSS Grid and Flexbox?
Technical
Q76What are React hooks, and why are they used?
Technical
Q77How does state management work in React applications?
Technical
Q78Can you explain how you would optimize the performance of a React application?
Technical
Q79What is middleware in the context of Node.js and Express?
Technical
Q80How do you manage asynchronous code in JavaScript?
Technical
Q81Explain how relational databases handle relationships.
Technical
Q82How would you implement pagination in a REST API?
Technical
Q83Describe how you would secure an API using authentication and authorization techniques.
Technical
Q84Explain the purpose of a version control system and Git workflow.
Technical
Q85What are WebSockets, and how do they differ from HTTP requests?
Technical
Q86Describe the concept of MVC architecture.
Technical
Q87What is CORS, and how do you handle it in a web application?
Technical
Q88How do you use Postman for testing APIs?
Technical
Q89How would you deploy a full-stack application to a cloud provider?
Technical
Q90What is the purpose of a build tool like Webpack or Vite?
Technical
Q91How do you debug an issue that occurs in both the frontend and back-end?
Technical
Q92Explain the role of Docker in development and deployment.
Technical
Q93How would you implement real-time updates in a web application?
Technical
Q94What are some strategies for improving the SEO of a React-based application?
Technical
Q95How would you implement server-side rendering in a modern React app?
Technical
Q96What is code splitting, and how does it improve performance?
Technical
Q97Explain how to handle memory leaks in frontend applications.
Technical
Q98How would you implement internationalization in a full-stack app?
Technical
Q99Explain how you would design and implement a microservices architecture.
Technical
Q100What are some strategies to ensure high availability and scalability?
Technical
Q101How do you handle database migrations in production systems?
Technical
Q102What is GraphQL and how does it differ from REST?
Technical
Q103How would you implement caching in a back-end system?
Technical
Q104How do you handle security vulnerabilities such as SQL injection and XSS?
Technical
Q105Explain how CI/CD pipelines work and tools used to implement them.
Technical
Q106How do you approach performance monitoring in a full-stack application?
Technical
Q107What is event-driven architecture, and when would you use it?
Technical
Q108What are common challenges in building full-stack applications?
Technical
Q109What is MERN Stack?
Technical
Q110How MERN Stack Works?
Technical
Q111What is DNS?
Technical
Q112How does DNS work?
Technical
Q113Difference between HTTP and HTTPS?
Technical
Q114Difference between previous version of HTML and HTML 5?
Technical
Q115Difference between HTML and XHTML?
Technical
Q116What do you mean by CORS (Cross-Origin Resource Sharing)?
Technical
Q117Explain event loop in Node.js?
Technical
Q118What is Promise and explain its states?
Technical
Q119Explain the Restful API and write its usage?
Technical
Q120State the difference between GET and POST?
Technical
Q121What is the difference between PUT and PATCH method?
Technical
Q122What is event bubbling and capturing in JavaScript?
Technical
Q123Explain the meaning of multithreading?
Technical
Q124What is Callback Hell?
Technical
Q125State difference between normalization and denormalization?
Technical
Q126What do you mean by Temporal Dead Zone in ES6?
Technical
Q127What is !DOCTYPE?
Technical
Q128What are elements and tags in HTML?
Technical
Q129What are the various heading tags and their importance?
Technical
Q130How to redirect to a particular section of a page using HTML?
Technical
Q131What are attributes?
Technical
Q132Are <b> and <strong> tags same? If not, then why?
Technical
Q133What are <em> and <i> tags?
Technical
Q134What is the difference between block and inline elements?
Technical
Q135Are <div> and <span> tags similar?
Technical
Q136What is the difference between classes and id?
Technical
Q137What are meta tags? How are they important?
Technical
Q138What is CSS?
Technical
Q139Why do we use CSS?
Technical
Q140How is CSS different from CSS 3?
Technical
Q141What is the syntax for CSS?
Technical
Q142In how many ways can we add CSS to our HTML file?
Technical
Q143What does the ‘a’ in rgba mean?
Technical
Q144What are CSS HSL Colors?
Technical
Q145What are the different CSS border properties?
Technical
Q146What are Data Types in JavaScript?
Technical
Q147What is the use of the isNaN function?
Technical
Q148Which is faster in JavaScript and ASP script?
Technical
Q149What is negative infinity?
Technical
Q150Is it possible to break JavaScript Code into several lines?
Technical
Q151Which company developed JavaScript?
Technical
Q152What are undeclared and undefined variables?
Technical
Q153Write a JavaScript code for adding new elements dynamically.
Technical
Q154What are global variables? How are these variables declared, and what are the problems associated with them?
Technical
Q155What do you mean by NULL in JavaScript?
Technical
Q156How to delete property-specific values?
Technical
Q157Tell me about a time when you had to refactor a significant portion of code that was poorly written or structured. What approach did you take and what was the outcome?
Behavioral
Q158Describe a situation where you had to explain a complex technical issue to non-technical stakeholders. How did you approach this communication challenge?
Behavioral
Q159Tell me about a time when you had to learn a new technology or framework quickly to complete a project. How did you approach the learning process?
Behavioral
Q160Describe a situation where you disagreed with another developer or team member about an approach to solving a technical problem. How did you handle the disagreement?
Behavioral
Q161Tell me about a time when you mentored or helped a junior developer improve their skills. What was your approach and what was the outcome?
Behavioral
Q162Describe a project where you had to make technical decisions with incomplete information or changing requirements. How did you handle this situation?
Situational
Q163Tell me about a time when you had to balance technical debt reduction with the delivery of new features. How did you approach this challenge?
Situational
Q164Describe a situation where you had to debug a particularly challenging production issue. What was your approach to identifying and resolving the problem?
Technical
Q165Tell me about a time when you had to lead the architecture or design of a significant new feature or system. What was your approach and what was the outcome?
Technical
Q166Describe a time when you had to work with a team to improve the performance of an application. What was your approach?
Technical
Q167Tell me about a time when you had to manage conflicting priorities in a project. How did you handle it?
Behavioral
Q168Describe a situation where a project you were working on failed or didn't meet expectations. What went wrong and what did you learn from it?
Experience
Q169Tell me about a time when you had to make a significant technical decision that had long-term implications for the codebase or architecture. What was your process?
Technical
Q170Describe a time when you had to give constructive feedback to a peer or team member about their code or technical approach. How did you handle this situation?
Behavioral
Q171Tell me about a time when you had to learn from a significant mistake or technical error you made. What happened and how did you grow from it?
Experience