[Solved] Given this Dockerfile:FROM alpine RUN echo 'Hello' > /file1 RUN echo 'World' > /file2What is the main difference in the image size when built with and without --squash? | Docker

Docker - Image Optimization

Given this Dockerfile:

FROM alpine
RUN echo 'Hello' > /file1
RUN echo 'World' > /file2

What is the main difference in the image size when built with and without --squash?

AThe image with --squash is smaller because layers are combined

BThe image with --squash is larger because it adds extra metadata

CBoth images have the same size because layers do not affect size

DThe image without --squash is smaller because layers are cached

Step-by-Step Solution

Solution:

Step 1: Understand how layers affect image size
Each RUN command creates a new layer, adding to the total image size.
Step 2: Effect of --squash on layers
Using --squash merges layers, removing intermediate data and reducing size.
Final Answer:
The image with --squash is smaller because layers are combined -> Option A
Quick Check:
Squash reduces size by merging layers [OK]

Quick Trick: Squash merges layers, reducing image size [OK]

Common Mistakes:

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