E7A01:

Which circuit is bistable?

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

E7A02:

What is the function of a decade counter?

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

E7A03:

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

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

E7A04:

How many flip-flops are required to divide a signal frequency by 4?

1. 1
2. 2
3. 4
4. 8

E7A05:

Which of the following is a circuit that continuously alternates between two states without an external clock?

1. Monostable multivibrator
2. J-K flip-flop
3. T flip-flop
4. Astable multivibrator

E7A06:

What is a characteristic of a monostable multivibrator?

1. It switches momentarily to the opposite binary state and then returns to its original state after a set time
2. It produces a continuous square wave oscillating between 1 and 0
3. It stores one bit of data in either a 0 or 1 state
4. It maintains a constant output voltage, regardless of variations in the input voltage

E7A07:

What logical operation does a NAND gate perform?

1. It produces logic 0 at its output only when all inputs are logic 0
2. It produces logic 1 at its output only when all inputs are logic 1
3. It produces logic 0 at its output if some but not all inputs are logic 1
4. It produces logic 0 at its output only when all inputs are logic 1

E7A08:

What logical operation does an OR gate perform?

1. It produces logic 1 at its output if any or all inputs are logic 1
2. It produces logic 0 at its output if all inputs are logic 1
3. It only produces logic 0 at its output when all inputs are logic 1
4. It produces logic 1 at its output if all inputs are logic 0

E7A09:

What logical operation is performed by an exclusive NOR gate?

1. It produces logic 0 at its output only if all inputs are logic 0
2. It produces logic 1 at its output only if all inputs are logic 1
3. It produces logic 0 at its output if only one input is logic 1
4. It produces logic 1 at its output if only one input is logic 1

E7A10:

What is a truth table?

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

E7A11:

What type of logic defines "1" as a high voltage?

1. Reverse Logic
2. Assertive Logic
3. Negative logic
4. Positive Logic