In a multi-stage Docker build, how can cache mounts be effectively used to speed up dependency installation?

hard📝 Workflow Q9 of 15

Docker - Image Optimization

ADeclare cache mounts only in the final stage to reuse dependencies

BUse cache mounts in the build stage where dependencies are installed, then copy artifacts to later stages

CUse volumes instead of cache mounts for sharing dependencies between stages

DAvoid cache mounts and rely solely on Docker layer caching between stages

Step-by-Step Solution

Solution:

Step 1: Understand multi-stage builds
Multi-stage builds separate build steps into stages to optimize image size and caching.
Step 2: Use cache mounts in build stages
Cache mounts should be used in the stage where dependencies are installed to speed up repeated installs.
Step 3: Copy artifacts forward
After installing dependencies with cache mounts, copy the results to subsequent stages.
Final Answer:
Use cache mounts in the build stage where dependencies are installed, then copy artifacts to later stages -> Option B
Quick Check:
Cache mounts optimize build stages, not final stages [OK]

Quick Trick: Apply cache mounts in build stages, then copy outputs [OK]

Common Mistakes:

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