Digital Electronics

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Q. What is the output of a NAND gate if both inputs are true?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of a NAND gate when both inputs are low?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of a NOR gate if one input is 1?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of a NOR gate when both inputs are true?
  • A. True
  • B. False
  • C. Undefined
  • D. High impedance
Q. What is the output of a NOT gate if the input is 0?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of a NOT gate when the input is 1?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. What is the output of a NOT gate when the input is false?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of a shift register after shifting a binary '1011' left by 1 position?
  • A. 0110
  • B. 1100
  • C. 1011
  • D. 10110
Q. What is the output of an AND gate if both inputs are 1?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of an AND gate if both inputs are true?
  • A. True
  • B. False
  • C. Undefined
  • D. None of the above
Q. What is the output of an AND gate when both inputs are high?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of an Ex-NOR gate when both inputs are 1?
  • A. 1
  • B. 0
  • C. Undefined
  • D. Both 0 and 1
Q. What is the output of an Ex-NOR gate when both inputs are the same?
  • A. 0
  • B. 1
  • C. Depends on the circuit
  • D. Undefined
Q. What is the output of an Ex-OR gate for inputs A=1 and B=1?
  • A. 1
  • B. 0
  • C. Undefined
  • D. Both 0 and 1
Q. What is the output of an Ex-OR gate when both inputs are the same?
  • A. 1
  • B. 0
  • C. Undefined
  • D. Both 0 and 1
Q. What is the output of an OR gate if both inputs are 0?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of an OR gate if both inputs are false?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of an XOR gate when both inputs are high?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of the expression A XOR A?
  • A. 0
  • B. 1
  • C. A
  • D. Undefined
Q. What is the output state of a D Flip-Flop when the D input is 0 at the clock edge?
  • A. 1
  • B. 0
  • C. Toggle
  • D. Indeterminate
Q. What is the output state of a D flip-flop when the D input is low at the clock edge?
  • A. High
  • B. Low
  • C. Toggle
  • D. Undefined
Q. What is the primary advantage of CMOS logic over TTL logic?
  • A. Higher speed
  • B. Lower power consumption
  • C. Greater noise immunity
  • D. Simpler design
Q. What is the primary advantage of CMOS logic over TTL?
  • A. Higher speed
  • B. Lower power consumption
  • C. Greater noise immunity
  • D. Simpler design
Q. What is the primary advantage of using a PLD?
  • A. Lower cost than fixed-function devices
  • B. Higher performance than microcontrollers
  • C. Flexibility to change logic functions after manufacturing
  • D. Easier to design than ASICs
Q. What is the primary advantage of using a synchronous counter?
  • A. Simplicity in design
  • B. Faster operation
  • C. Lower power consumption
  • D. Easier to implement
Q. What is the primary advantage of using MSI circuits?
  • A. Lower power consumption
  • B. Increased complexity
  • C. Reduced size and cost
  • D. Higher speed
Q. What is the primary characteristic of TTL logic families?
  • A. High speed and low power consumption
  • B. Low speed and high power consumption
  • C. High speed and moderate power consumption
  • D. Low speed and low power consumption
Q. What is the primary difference between a CPLD and an FPGA?
  • A. CPLDs are more complex than FPGAs
  • B. FPGAs have more logic resources than CPLDs
  • C. CPLDs are slower than FPGAs
  • D. FPGAs are less flexible than CPLDs
Q. What is the primary disadvantage of bipolar junction transistors (BJTs) compared to MOSFETs in integrated circuits?
  • A. Higher power consumption
  • B. Lower switching speed
  • C. More complex fabrication
  • D. Larger size
Q. What is the primary function of a 555 timer in monostable mode?
  • A. Generate a continuous square wave
  • B. Generate a single pulse of a specific duration
  • C. Act as a voltage comparator
  • D. Control the brightness of an LED
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