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1.
What is the difference between availability and reliability in the context of a software system?
Answer:
Availability & Reliability Fundamentals
- 2.
How do you define system availability and what are the key components to measure it?
Answer: - 3.
Can you explain the concept of “Five Nines” and how it relates to system availability?
Answer: - 4.
How does redundancy contribute to the reliability of a system?
Answer: - 5.
What is a single point of failure (SPOF), and how can it be mitigated?
Answer: - 6.
Discuss the significance of Mean Time Between Failures (MTBF) in reliability engineering.
Answer: - 7.
What is the role of Mean Time to Repair (MTTR) in maintaining system availability?
Answer: - 8.
Can you differentiate between high availability (HA) and fault tolerance (FT)?
Answer:
Designing for Availability
- 9.
How would you architect a system for high availability?
Answer: - 10.
What design patterns are commonly used to improve system availability?
Answer: - 11.
How can load balancing improve system availability, and what are some of its potential pitfalls?
Answer: - 12.
Explain the role of health checks in maintaining an available system.
Answer: - 13.
What is the purpose of a circuit breaker pattern in a distributed system?
Answer:
Monitoring & Incident Response
- 14.
What are some key indicators you would monitor to ensure system reliability?
Answer: - 15.
How do you implement a monitoring system that accurately reflects system availability?
Answer: - 16.
Discuss the importance of alerting and on-call rotations in maintaining system reliability.
Answer: - 17.
What steps would you take to respond to an incident that reduces system availability?
Answer: - 18.
How can post-mortem analysis improve future system reliability and availability?
Answer:
Scaling & Performance
- 19.
How does system scalability impact availability?
Answer: - 20.
What strategies can be employed to scale a system while maintaining or improving reliability?
Answer: - 21.
Describe how caching can affect system reliability and what are some trade-offs.
Answer: - 22.
Explain the role of rate limiting in preserving system availability.
Answer:
Reliability in Distributed Systems
- 23.
How do eventual consistency and strong consistency differ and what are the reliability implications?
Answer: - 24.
Describe the CAP theorem and its relevance to system availability.
Answer: - 25.
Can you discuss how quorum-based decision making in distributed systems affects reliability?
Answer: - 26.
What is the role of distributed transactions in reliability, and what are the challenges associated with them?
Answer:
Recovery Strategies
- 27.
What is a disaster recovery plan and how does it relate to reliability?
Answer: - 28.
How do backup and restore operations impact system availability?
Answer: - 29.
Discuss the importance and challenges of data replication in a highly available system.
Answer: - 30.
Explain how you would plan for a failover strategy in a multi-region deployment to ensure reliability.
Answer:
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