E7A01:

Which is a bi-stable circuit?

  1. An "AND" gate
  2. An "OR" gate
  3. A flip-flop
  4. A clock

E7A02:

What is the function of a decade counter digital IC?

  1. It produces one output pulse for every ten input pulses
  2. It decodes a decimal number for display on a seven segment LED display
  3. It produces ten output pulses for every input pulse
  4. It adds two decimal numbers together

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 any single input is logic "1"
  4. It produces logic "1" at its output if any single 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

E7A12:

What type of logic defines "0" as a high voltage?

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