Boolean logic

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An automated garden irrigation system turns on the sprinkler ( $S$ ) if the soil is dry ( $D$ ) or the temperature is high ( $H$ ), and it is not currently raining ( $R$ ).

The table identifies the three inputs:

Input	Description
D	Soil is dry
H	Temperature is high
R	It is currently raining

The logic system is represented by the expression:

\text{ OR } H) \text{ AND NOT } R

Complete the logic diagram below by identifying which logic gate (AND, OR, or NOT) belongs in each of the dashed boxes labeled Box 1, Box 2, and Box 3.

A logic diagram with three inputs on the left: D, H, and R. Inputs D and H connect to the inputs of a dashed rectangular box labeled Box 1. Input R connects to a dashed rectangular box labeled Box 2. The output of Box 1 and the output of Box 2 are connected to the inputs of a third dashed rectangular box labeled Box 3. The output of Box 3 is labeled S.

Specify the gate for each box:

Box 1
Box 2
Box 3

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Boolean logic Questions

Practise OCR GCSE Computer Science Boolean logic with exam-style questions for GCSE Computer Science. 27 questions, matched to the OCR GCSE Computer Science (J277) specification and written in Component 01 and Component 02 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.