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AP Computer Science Principles

Unit 1
Unit 1: Data
Introduction to DataData RepresentationData TypesData Structures
Unit 3 • Chapter 4

Endianness

Video Summary

Endianness is the order in which bytes of data are stored in computer memory. There are two main endianness formats: big-endian and little-endian. In big-endian, the most significant byte (MSB) is stored at the lowest memory address, while in little-endian, the least significant byte (LSB) is stored at the lowest memory address. The endianness of a computer system is typically determined by its CPU architecture. Endianness can cause problems when data is transferred between systems with different endianness formats.

Knowledge Check

What is endianness?

What is the difference between big-endian and little-endian?

Which is more common, big-endian or little-endian?