Tell me about yourself.

Answer: Start with a brief introduction of your professional background, highlighting relevant experience and achievements. Emphasise your passion for technology and mention any significant projects you've worked on. Finally, discuss how your skills align with the position you're interviewing for, showcasing your enthusiasm for the opportunity.

What are the key differences between object-oriented programming and functional programming?

Answer: Highlight the fundamental principles of each paradigm. Explain that object-oriented programming focuses on the use of classes, objects, and inheritance to structure code, while functional programming revolves around composing functions and immutable data. Emphasise that both paradigms have their strengths and are suited for different types of problems.

Describe the concept of Big O notation and its significance in algorithm analysis.

Answer: Explain that Big O notation is used to describe the efficiency and scalability of an algorithm. It represents the worst-case runtime complexity in terms of input size. Discuss how Big O notation helps assess the performance of algorithms and enables developers to make informed decisions when choosing between different approaches.

How does HTTP work? Explain the request-response cycle.

Answer: Describe the basics of the Hypertext Transfer Protocol (HTTP), focusing on the client-server interaction. Discuss how the client sends a request to a server, including the request method (e.g., GET, POST), the URL, and any additional headers or parameters. Explain how the server processes the request and sends back a response with an appropriate status code and content.

What is the difference between SQL and NoSQL databases?

Answer: Highlight that SQL databases are based on a structured schema and use structured query language for data manipulation. Mention that NoSQL databases, on the other hand, are schema-less and provide flexible data models. Discuss the trade-offs between consistency and scalability, and when to consider using each type of database.

How does virtual memory work?

Answer: Explain that virtual memory allows the operating system to allocate more memory to processes than physically available. Describe the concept of virtual addresses and how they are mapped to physical memory. Discuss the benefits, such as memory isolation and efficient memory management, that virtual memory provides.

What is the difference between Git and SVN?

Answer: Highlight that both Git and SVN are version control systems but with different underlying architectures. Explain that Git is a distributed version control system, which means that every user has a complete copy of the repository. SVN, on the other hand, is centralised, with a single repository that users connect to. Discuss the advantages of distributed version control and the flexibility it offers.

By familiarising yourself with these commonly asked tech interview questions and preparing thoughtful answers, you'll be well-equipped to tackle any technical interview with confidence. Remember to tailor your responses to your own experiences and showcase your problem-solving abilities. With diligent preparation and practice, you'll increase your chances of success and land your dream tech job. Good luck!

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