Boolean Logic Diagrams (OCR GCSE Computer Science): Exam Questions

A fast food restaurant offers half-price meals if the customer is a student or has a discount card.
The offer is not valid on Saturdays.

A computer system is used to identify whether the customer can have a half-price meal.

The table identifies the three inputs to the computer system:

The logic system P = (A OR B) AND NOT C is used

Complete the following logic diagram for P = (A OR B) AND NOT C by drawing one logic gate in each box.

A truth table can be produced for this logic circuit.

Describe the purpose of a truth table.

State how many rows (excluding any headings) would be required in a truth table for the logic expression:

P = (A OR B) AND NOT C

Draw the logic diagram for the logic system P = A OR (B AND C)

Complete the truth table for the logic system P = NOT (A OR B)

The logic diagram below (Fig. 2) shows a system made up of two connected logic gates.

Label the names of the two gates on the diagram above

Complete the truth table below to show the output from the logic system in part(a).

Draw the logic diagram represented by

Complete the truth table for P = (A AND B) OR C

Draw a logic circuit for P = NOT A AND (B OR C)

Draw the logic diagram represented by:

P =(A OR NOT B) AND (A OR C)

Write the Boolean expression represented by the logic diagram below:

Complete the truth table for the Boolean expression:

P = (A AND B) AND  NOT C

Given the logic circuit with inputs A, B, and C:

P = (A OR B) AND  NOT C

State the outputs when A = 1, B = 0, and C = 1.