18 Caching Patterns questions from the Caching 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 pattern where the application checks the store first and loads from the database on a miss, then populates the store
B.a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
C.a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
D.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
Answer + AI explanation with Pro
2. Which term means: "a pattern where the application checks the store first and loads from the database on a miss, then populates the store"?
Junior
A.Refresh-ahead
B.Write-through
C.Read-through
D.Cache-aside
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.Cache-aside — a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
B.Cache-aside — populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
C.Cache-aside — a pattern where the application checks the store first and loads from the database on a miss, then populates the store
D.Cache-aside — a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
Answer + AI explanation with Pro
4. What is Read-through?
Junior
A.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
B.a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
C.a pattern where the application checks the store first and loads from the database on a miss, then populates the store
D.a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
Answer + AI explanation with Pro
5. Which term means: "a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache"?
Junior
A.Refresh-ahead
B.Lazy loading
C.Write-through
D.Read-through
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.Read-through — populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
B.Read-through — a pattern where the application checks the store first and loads from the database on a miss, then populates the store
C.Read-through — a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
D.Read-through — a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
Answer + AI explanation with Pro
7. What is Write-through?
Mid
A.a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
B.populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
C.a pattern where the application checks the store first and loads from the database on a miss, then populates the store
D.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
Answer + AI explanation with Pro
8. Which term means: "a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency"?
Mid
A.Cache-aside
B.Refresh-ahead
C.Write-through
D.Read-through
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
A.Write-through — a pattern where the application checks the store first and loads from the database on a miss, then populates the store
B.Write-through — a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
C.Write-through — a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
D.Write-through — a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
Answer + AI explanation with Pro
10. What is Write-behind?
Mid
A.a pattern where the application checks the store first and loads from the database on a miss, then populates the store
B.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
C.a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
D.a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
Answer + AI explanation with Pro
11. Which term means: "a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss"?
Mid
A.Write-behind
B.Cache-aside
C.Refresh-ahead
D.Write-through
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Write-behind — a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
B.Write-behind — a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
C.Write-behind — populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
D.Write-behind — a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
Answer + AI explanation with Pro
13. What is Refresh-ahead?
Senior
A.a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
B.a pattern where the application checks the store first and loads from the database on a miss, then populates the store
C.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
D.a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
Answer + AI explanation with Pro
14. Which term means: "a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users"?
Senior
A.Cache-aside
B.Write-through
C.Read-through
D.Refresh-ahead
Answer + AI explanation with Pro
15. Which statement is correct?
Senior
A.Refresh-ahead — a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
B.Refresh-ahead — a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
C.Refresh-ahead — a pattern where the application checks the store first and loads from the database on a miss, then populates the store
D.Refresh-ahead — a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
Answer + AI explanation with Pro
16. What is Lazy loading?
Junior
A.a pattern that synchronously updates the store and the database together on every write, keeping both consistent at the cost of write latency
B.populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
C.a pattern where the application checks the store first and loads from the database on a miss, then populates the store
D.a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
Answer + AI explanation with Pro
17. Which term means: "populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory"?
Junior
A.Lazy loading
B.Refresh-ahead
C.Read-through
D.Write-through
Answer + AI explanation with Pro
18. Which statement is correct?
Junior
A.Lazy loading — a pattern that updates the fast store immediately and persists to the database asynchronously later, improving write throughput but risking data loss
B.Lazy loading — populating a fast store only when data is first requested rather than ahead of time, so only accessed items consume memory
C.Lazy loading — a pattern where the cache itself loads missing data from the backing store, so the application only ever talks to the cache
D.Lazy loading — a pattern that proactively reloads soon-to-expire entries before they are requested, hiding refresh latency from users
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.