beginner · layout

When Do You Have to Care About Endianness?

What is endianness, and in what situations does it actually affect your code?

Practical scenario

A service writes structs directly to a cache file for speed. It works everywhere in testing. A new deployment target reads the file and gets nonsense values.

What it tests

  • Understanding of byte order within a multi-byte value
  • Whether the candidate knows when it is and is not visible
  • Awareness of serialization and protocol boundaries

Lessons behind this question