083. OCR A Level (H446) SLR13 – 1.4 Bitwise manipulation and masks

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About this video

OCR Specification Reference
A Level 1.4.1i

In this video we look at a technique called bitwise manipulation and masks. In particular we focus on shifts and combining these with AND, OR and XOR.

Key question:

- What other operations can an arithmetic logic unit (ALU) carry out?

00:00 Bitwise manipulation and masks
00:08 Intro
00:13 Logical binary left shift
01:59 Logical binary right shift
03:17 Logical shifts vs arithmetic shifts
04:32 A note from the exam clarification document
04:46 Bitwise masks
05:18 How bitwise ANDing can extract a subset of bits
06:52 How bitwise ORing sets a subset of bits
08:23 How bitwise XORing sets a subset of bits
10:15 Where are masks and bitwise operations used in computing?
11:59 Key question
12:10 Outro

Last updated: 13.07.26

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• SLR 13 – Data types