15 Caching Patterns questions from the Redis bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
Free to start: the 2-minute IT readiness check — six questions and a result.
A.a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
B.the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
C.a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
D.a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
Answer + AI explanation with Pro
2. Which term means: "a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself"?
Junior
A.Write-behind
B.Cache stampede
C.Cache-aside
D.Write-through
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.Cache-aside — a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
B.Cache-aside — using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
C.Cache-aside — a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
D.Cache-aside — the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
Answer + AI explanation with Pro
4. What is Write-through?
Mid
A.a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
B.a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
C.a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
D.the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
Answer + AI explanation with Pro
5. Which term means: "a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent"?
Mid
A.Write-through
B.Thundering herd mitigation
C.Cache stampede
D.Cache-aside
Answer + AI explanation with Pro
6. Which statement is correct?
Mid
A.Write-through — a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
B.Write-through — a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
C.Write-through — a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
D.Write-through — using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
Answer + AI explanation with Pro
7. What is Write-behind?
Mid
A.a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
B.a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
C.using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
D.the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
Answer + AI explanation with Pro
8. Which term means: "a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk"?
Mid
A.Write-through
B.Thundering herd mitigation
C.Cache stampede
D.Write-behind
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
A.Write-behind — using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
B.Write-behind — a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
C.Write-behind — a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
D.Write-behind — the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
Answer + AI explanation with Pro
10. What is Cache stampede?
Senior
A.a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
B.a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
C.a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
D.the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
Answer + AI explanation with Pro
11. Which term means: "the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store"?
Senior
A.Thundering herd mitigation
B.Cache stampede
C.Write-through
D.Cache-aside
Answer + AI explanation with Pro
12. Which statement is correct?
Senior
A.Cache stampede — the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
B.Cache stampede — a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
C.Cache stampede — a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
D.Cache stampede — a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
Answer + AI explanation with Pro
13. What is Thundering herd mitigation?
Senior
A.a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
B.using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
C.a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
D.a strategy where updates hit the cache immediately and are flushed to the database asynchronously, improving latency at durability risk
Answer + AI explanation with Pro
14. Which term means: "using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data"?
Senior
A.Write-through
B.Thundering herd mitigation
C.Cache-aside
D.Cache stampede
Answer + AI explanation with Pro
15. Which statement is correct?
Senior
A.Thundering herd mitigation — a pattern where the application checks the cache first, loads from the database on a miss, and then populates the cache itself
B.Thundering herd mitigation — a strategy where every update is written to both the cache and the backing store synchronously, keeping them consistent
C.Thundering herd mitigation — the surge of many simultaneous requests recomputing the same expired entry, overwhelming the backing store
D.Thundering herd mitigation — using a short lock or single-flight so only one request rebuilds a missing entry while others wait or serve stale data
Answer + AI explanation with Pro
Free to start
Start with a free readiness check
Sign up free for the 2-minute IT readiness check and a scored result. Answers, explanations and the AI tutor on every Caching Patterns question come with Pro.