15 real Persistence questions from the Redis bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is RDB snapshot?
Junior
A.the tunable controlling how often buffered writes are flushed to disk, with everysec offering a balance of safety and throughput
B.a durability mode that logs every write command as it happens so the dataset can be reconstructed by replaying the log on restart
C.a point-in-time binary dump of the whole dataset written to disk at intervals, compact and fast to load but able to lose recent writes
D.a background compaction that rebuilds the write log into the smallest set of commands needed to recreate the current state
2. Which term means: "a point-in-time binary dump of the whole dataset written to disk at intervals, compact and fast to load but able to lose recent writes"?
A.RDB snapshot — a background compaction that rebuilds the write log into the smallest set of commands needed to recreate the current state
B.RDB snapshot — a point-in-time binary dump of the whole dataset written to disk at intervals, compact and fast to load but able to lose recent writes
C.RDB snapshot — the tunable controlling how often buffered writes are flushed to disk, with everysec offering a balance of safety and throughput
D.RDB snapshot — a durability mode that logs every write command as it happens so the dataset can be reconstructed by replaying the log on restart
5. Which term means: "a durability mode that logs every write command as it happens so the dataset can be reconstructed by replaying the log on restart"?
8. Which term means: "the tunable controlling how often buffered writes are flushed to disk, with everysec offering a balance of safety and throughput"?
A.fsync policy — a format combining a compact base snapshot with a tail of recent commands, giving fast reloads plus minimal data loss
B.fsync policy — the tunable controlling how often buffered writes are flushed to disk, with everysec offering a balance of safety and throughput
C.fsync policy — a durability mode that logs every write command as it happens so the dataset can be reconstructed by replaying the log on restart
D.fsync policy — a point-in-time binary dump of the whole dataset written to disk at intervals, compact and fast to load but able to lose recent writes
A.Hybrid persistence — a background compaction that rebuilds the write log into the smallest set of commands needed to recreate the current state
B.Hybrid persistence — a point-in-time binary dump of the whole dataset written to disk at intervals, compact and fast to load but able to lose recent writes
C.Hybrid persistence — a format combining a compact base snapshot with a tail of recent commands, giving fast reloads plus minimal data loss
D.Hybrid persistence — a durability mode that logs every write command as it happens so the dataset can be reconstructed by replaying the log on restart
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