Cache Layers interview questions

15 real Cache Layers questions from the Caching 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 Browser cache?

Junior
  1. A.an in-process or shared memory tier holding computed results inside the service itself
  2. B.a server sitting in front of origin applications that stores and serves responses on their behalf
  3. C.a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  4. D.the engine-managed memory area that retains recently used data and index pages to avoid disk reads
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3. Which statement is correct?

Junior
  1. A.Browser cache — a server sitting in front of origin applications that stores and serves responses on their behalf
  2. B.Browser cache — a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  3. C.Browser cache — the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  4. D.Browser cache — an in-process or shared memory tier holding computed results inside the service itself
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4. What is CDN?

Junior
  1. A.the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  2. B.a geographically distributed network of edge servers that store copies of content near end users to cut latency
  3. C.a server sitting in front of origin applications that stores and serves responses on their behalf
  4. D.an in-process or shared memory tier holding computed results inside the service itself
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5. Which term means: "a geographically distributed network of edge servers that store copies of content near end users to cut latency"?

Junior
  1. A.Reverse proxy cache
  2. B.CDN
  3. C.Application-level store
  4. D.Database buffer pool
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6. Which statement is correct?

Junior
  1. A.CDN — an in-process or shared memory tier holding computed results inside the service itself
  2. B.CDN — a geographically distributed network of edge servers that store copies of content near end users to cut latency
  3. C.CDN — a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  4. D.CDN — the engine-managed memory area that retains recently used data and index pages to avoid disk reads
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7. What is Reverse proxy cache?

Mid
  1. A.a server sitting in front of origin applications that stores and serves responses on their behalf
  2. B.the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  3. C.a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  4. D.a geographically distributed network of edge servers that store copies of content near end users to cut latency
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9. Which statement is correct?

Mid
  1. A.Reverse proxy cache — the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  2. B.Reverse proxy cache — a geographically distributed network of edge servers that store copies of content near end users to cut latency
  3. C.Reverse proxy cache — an in-process or shared memory tier holding computed results inside the service itself
  4. D.Reverse proxy cache — a server sitting in front of origin applications that stores and serves responses on their behalf
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10. What is Application-level store?

Mid
  1. A.a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  2. B.a geographically distributed network of edge servers that store copies of content near end users to cut latency
  3. C.a server sitting in front of origin applications that stores and serves responses on their behalf
  4. D.an in-process or shared memory tier holding computed results inside the service itself
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12. Which statement is correct?

Mid
  1. A.Application-level store — an in-process or shared memory tier holding computed results inside the service itself
  2. B.Application-level store — a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  3. C.Application-level store — the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  4. D.Application-level store — a server sitting in front of origin applications that stores and serves responses on their behalf
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13. What is Database buffer pool?

Mid
  1. A.a server sitting in front of origin applications that stores and serves responses on their behalf
  2. B.an in-process or shared memory tier holding computed results inside the service itself
  3. C.a geographically distributed network of edge servers that store copies of content near end users to cut latency
  4. D.the engine-managed memory area that retains recently used data and index pages to avoid disk reads
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15. Which statement is correct?

Mid
  1. A.Database buffer pool — an in-process or shared memory tier holding computed results inside the service itself
  2. B.Database buffer pool — a client-side store that keeps fetched assets and responses locally to avoid repeat network requests
  3. C.Database buffer pool — the engine-managed memory area that retains recently used data and index pages to avoid disk reads
  4. D.Database buffer pool — a server sitting in front of origin applications that stores and serves responses on their behalf
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