Electronics quiz
Digital logic basics quiz
Binary, logic gates and truth tables - the building blocks of digital circuits.
19 questions in the app. A few of them, with their answers:
In binary, what decimal value does 1011 represent?
- 9
- 11 ✓
- 13
- 15
Answer 1011 = (1×8) + (0×4) + (1×2) + (1×1) = 8 + 0 + 2 + 1 = 11.
An AND gate output is HIGH only when:
- At least one input is HIGH
- All inputs are HIGH ✓
- All inputs are LOW
- Exactly one input is HIGH
Answer AND requires every input to be HIGH for the output to be HIGH.
An OR gate output is HIGH when:
- All inputs are LOW
- At least one input is HIGH ✓
- Exactly two inputs are HIGH
- Never
Answer OR goes HIGH as soon as any one of its inputs is HIGH.
A NOT gate (inverter) does what to its single input?
- Doubles it
- Leaves it unchanged
- Inverts it - HIGH becomes LOW and vice versa ✓
- Delays it by one clock cycle
Answer A NOT gate simply flips the logic level: HIGH in gives LOW out, and LOW in gives HIGH out.
In a typical 5 V digital logic system, what is considered a "HIGH" level?
- Close to 0 V
- Close to 5 V ✓
- Exactly 2.5 V
- A negative voltage
Answer A HIGH logic level sits near the positive supply rail; LOW sits near 0 V (ground).
