[Solved] Given this Dockerfile:FROM ubuntu RUN apt-get update RUN apt-get install -y curl RUN echo 'Done'What is the effect on the image size when built with docker build --squash compared to a normal build? | Docker

Docker - Image Optimization

Given this Dockerfile:

FROM ubuntu
RUN apt-get update
RUN apt-get install -y curl
RUN echo 'Done'

What is the effect on the image size when built with docker build --squash compared to a normal build?

AThe image size will be smaller because layers are combined

BThe image size will be larger due to extra metadata

CThe image size remains the same

DThe build will fail due to unsupported command

Step-by-Step Solution

Solution:

Step 1: Understand layer creation in Dockerfile
Each RUN command creates a new layer increasing image size.
Step 2: Effect of --squash on layers
Squashing merges these layers into one, reducing overall image size.
Final Answer:
The image size will be smaller because layers are combined -> Option A
Quick Check:
Squash reduces image size by merging layers [OK]

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

Common Mistakes:

Master "Image Optimization" in Docker

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