THE PRACTICE STUDIO
Go slowly. Ask why. Make it yours.
PRACTICE / Logic gates and truth tables
Read a circuit one gate at a time
An ideal two-input NAND gate receives A and B. Its output feeds a NOT gate.
For how many of the four binary input pairs is the final output 1?
Organize the givens & assumptions
- Inputs A and B each take 0 or 1
- Gate order: NAND, then NOT
- Count each of the four input pairs once
Stable ideal binary inputs and outputs. Count 00, 01, 10 and 11 once each; ignore propagation delays.
- A
- B
- C
- D
Try it on paper first. Free sample problems in every collection include the complete reasoning: find one in this collection →