| 1 | What is Redis replication, and how does it help improve availability and read scalability? Redis › Redis Replication | Redis | Redis Replication | Beginner |
| 2 | How do you check the current replication status and role of a specific Redis instance, whether it is acting as a primary or a replica? Redis › Redis Replication | Redis | Redis Replication | Intermediate |
| 3 | How do you configure a Redis instance to become a replica of another Redis instance? Redis › Redis Replication | Redis | Redis Replication | Beginner |
| 4 | What is replication lag, and what factors can cause a replica to fall noticeably behind its primary server? Redis › Redis Replication | Redis | Redis Replication | Intermediate |
| 5 | How would you design a read scaling strategy using multiple Redis replicas for an application with a very read heavy workload? Redis › Redis Replication | Redis | Redis Replication | Advanced |
| 6 | What happens to a Redis Cluster's replicas during a failover event, and how does the cluster decide which replica gets promoted? Redis › Redis Replication | Redis | Redis Replication | Advanced |
| 7 | What is the difference between full resynchronization and partial resynchronization when a replica reconnects to its primary after a temporary disconnection? Redis › Redis Replication | Redis | Redis Replication | Intermediate |
| 8 | How do you enable TLS encryption for internal replication and cluster bus traffic between Redis nodes, not just for client connections? Redis › TLS & Encryption in Redis | Redis | TLS & Encryption in Redis | Advanced |
| 9 | What is Redis Sentinel, and what role does it play in providing high availability for a non clustered Redis setup? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Beginner |
| 10 | Why does Redis Sentinel recommend running at least three Sentinel instances rather than just one? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Beginner |
| 11 | How would you set up a disaster recovery plan for Redis that accounts for an entire data center or region becoming unavailable? Redis › Redis Backup & Disaster Recovery | Redis | Redis Backup & Disaster Recovery | Intermediate |
| 12 | How does an application discover the current primary Redis instance when using Sentinel, especially after a failover has occurred? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Intermediate |
| 13 | How does replication work in ElastiCache for Redis to provide high availability? AWS › Amazon ElastiCache (Redis & Memcached) | AWS | Amazon ElastiCache (Redis & Memcached) | Intermediate |
| 14 | How would you deploy Redis Sentinel across multiple data centers or availability zones to maximize resilience against a localized failure? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Advanced |
| 15 | What is the difference between using Redis Sentinel and using Redis Cluster for achieving high availability, and how would you decide between them? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Advanced |
| 16 | What is the quorum setting in a Sentinel configuration, and how does it affect the decision to trigger a failover? Redis › Redis Sentinel & High Availability | Redis | Redis Sentinel & High Availability | Intermediate |
| 17 | What is sharding in a Redis Cluster, and why is it necessary for very large datasets? Redis › Cluster Sharding & Hash Slots | Redis | Cluster Sharding & Hash Slots | Beginner |
| 18 | What is the difference between a master node and a replica node within a Redis Cluster? Redis › Clustering | Redis | Clustering | Beginner |