@leonov

Explain the concept of Big O notation

What is Big O notation? How is it used to analyze the efficiency of algorithms? Provide examples.

• Algorithms
• Amazon
• Junior

What is a GraphQL schema?

Describe the role of a schema in GraphQL and how it defines the data structure.

What are the differences between SQL and NoSQL databases?

Compare and contrast SQL and NoSQL databases. When would you choose one over the other?

• Databases
• Google
• Senior

Explain the concept of eventual consistency

What is eventual consistency in distributed systems? Discuss its implications and use cases.

• Distributed Systems
• Microsoft
• Staff

What is CORS and how do you handle it?

Explain Cross-Origin Resource Sharing (CORS). How do you configure a server to allow CORS requests?

• Web Security
• Amazon
• Staff

Difference between Class and Functional Components in React

Discuss the differences between class components and functional components in React. When would you use one over the other?

• React
• Netflix
• Senior

Explain the concept of idempotency

What does it mean for an operation to be idempotent? Provide examples in the context of APIs.

• Meta (Facebook)
• Senior

Explain the concept of ACID properties in databases

What are ACID properties? Describe each property and its importance in transactional databases.

• Netflix
• Middle

What are different types of API authentication?

Describe various API authentication methods like API keys, OAuth, JWT, etc.

Explain the concept of eventual consistency in distributed systems

What is eventual consistency? Discuss its implications and common use cases.