Full-Stack Developer Interview Questions and Answers
Experienced / Expert level questions & answers
Ques 1. Explain the concept of server-side rendering (SSR) in the context of web development.
Server-side rendering involves rendering web pages on the server and sending fully rendered HTML to the client, providing better initial page load performance.
Ques 2. Explain the concept of microservices architecture.
Microservices architecture involves developing a single application as a collection of small, independent services, each with its own database and functionality, communicating via APIs.
Ques 3. Explain the concept of XSS (Cross-Site Scripting) and how to prevent it.
XSS is a security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. Prevention methods include input validation and output encoding.
Ques 4. Explain the concept of continuous integration and continuous deployment (CI/CD) in Full-Stack development.
CI/CD is a set of practices that automate the process of testing and deploying code changes, ensuring a faster and more reliable development workflow.
Ques 5. Explain the concept of design patterns and provide an example relevant to Full-Stack development.
Design patterns are reusable solutions to common problems in software design. An example is the Observer pattern, where an object (subject) maintains a list of its dependents (observers) that are notified of any state changes.
Ques 6. Explain the concept of the SOLID principles in object-oriented design.
SOLID is an acronym representing a set of five principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion) that guide software design for maintainability and scalability.
Ques 7. Explain the concept of idempotence in the context of web development.
An operation is idempotent if repeating it multiple times has the same result as a single execution. In HTTP, safe methods (GET) are idempotent, while unsafe methods (POST) may not be.
Ques 8. What is the role of a reverse engineering tool in Full-Stack development?
Reverse engineering tools help developers understand and analyze existing code or systems, facilitating code maintenance, optimization, and debugging.
Ques 9. Explain the concept of memoization in the context of optimizing function performance.
Memoization is a technique to cache the results of expensive function calls and return the cached result when the same inputs occur again, reducing computation time.
Ques 10. Explain the concept of optimistic and pessimistic concurrency control in database transactions.
Optimistic concurrency control assumes no conflict and allows transactions to proceed, checking for conflicts only at the end. Pessimistic concurrency control locks data to prevent conflicts until the transaction is complete.
Ques 11. Explain the concept of WebAssembly and its role in web development.
WebAssembly (Wasm) is a binary instruction format that enables high-performance execution of code on web browsers. It allows running languages other than JavaScript in the browser for performance-critical tasks.
Ques 12. What is the purpose of the 'Cross-Origin Opener Policy' (COOP) in web security?
COOP is a security feature that controls how documents from different origins can interact. It helps prevent security vulnerabilities by isolating documents from different origins in a browsing context.
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