Which circuit is bistable?

1. A An AND gate
2. B An OR gate
3. C A flip-flop
4. D A bipolar amplifier

What is the function of a decade counter?

1. A It produces one output pulse for every 10 input pulses
2. B It decodes a decimal number for display on a seven-segment LED display
3. C It produces 10 output pulses for every input pulse
4. D It decodes a binary number for display on a seven-segment LED display

Which of the following can divide the frequency of a pulse train by 2?

1. A An XOR gate
2. B A flip-flop
3. C An OR gate
4. D A multiplexer

How many flip-flops are required to divide a signal frequency by 16?

1. A 4
2. B 6
3. C 8
4. D 16

Which of the following circuits continuously alternates between two states without an external clock signal?

1. A Monostable multivibrator
2. B J-K flip-flop
3. C T flip-flop
4. D Astable multivibrator

What is a characteristic of a monostable multivibrator?

1. A It switches temporarily to an alternate state for a set time
2. B It produces a continuous square wave
3. C It stores one bit of data
4. D It maintains a constant output voltage, regardless of variations in the input voltage

What logical operation does a NAND gate perform?

1. A It produces a 0 at its output only if all inputs are 0
2. B It produces a 1 at its output only if all inputs are 1
3. C It produces a 0 at its output if some but not all inputs are 1
4. D It produces a 0 at its output only if all inputs are 1

What logical operation does an OR gate perform?

1. A It produces a 1 at its output if any input is 1
2. B It produces a 0 at its output if all inputs are 1
3. C It produces a 0 at its output if some but not all inputs are 1
4. D It produces a 1 at its output if all inputs are 0

What logical operation is performed by a two-input exclusive NOR gate?

1. A It produces a 0 at its output only if all inputs are 0
2. B It produces a 1 at its output only if all inputs are 1
3. C It produces a 0 at its output if one and only one of its inputs is 1
4. D It produces a 1 at its output if one and only one input is 1

What is a truth table?

1. A A list of inputs and corresponding outputs for an op-amp
2. B A list of inputs and corresponding outputs for a digital device
3. C A diagram showing logic states when the digital gate output is true
4. D A table of logic symbols that indicate the logic states of an op-amp

What does "positive logic" mean in reference to logic devices?

1. A The logic devices have high noise immunity
2. B High voltage represents a 1, low voltage a 0
3. C The logic circuit is in the "true" condition
4. D 1s and 0s are defined as different positive voltage levels