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