Digital Electronics

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Q. What happens to the bits in a shift register when a shift operation is performed?
  • A. They are deleted
  • B. They are copied
  • C. They are shifted to the next position
  • D. They are reversed
Q. What happens to the data in a shift register when it is reset?
  • A. Data is preserved
  • B. Data is shifted out
  • C. Data is cleared
  • D. Data is inverted
Q. What happens when the trigger pin of a 555 timer is pulled low in monostable mode?
  • A. The output goes high
  • B. The output goes low
  • C. The timer resets
  • D. Nothing happens
Q. What is a characteristic of a serial-in, serial-out (SISO) shift register?
  • A. Data is input and output in parallel
  • B. Data is input serially and output serially
  • C. Data is input in parallel and output serially
  • D. Data is stored permanently
Q. What is a common application of MSI circuits?
  • A. Microprocessors
  • B. Basic resistors
  • C. Capacitors
  • D. Inductors
Q. What is a decade counter?
  • A. A counter that counts from 0 to 9
  • B. A counter that counts from 0 to 15
  • C. A counter that counts in binary
  • D. A counter that counts in hexadecimal
Q. What is a disadvantage of TTL logic families?
  • A. High power consumption
  • B. Low noise immunity
  • C. High cost
  • D. Low speed
Q. What is a disadvantage of using CMOS logic?
  • A. High power consumption
  • B. Slow switching speed
  • C. Susceptibility to noise
  • D. Complex fabrication process
Q. What is a finite state machine (FSM) in digital design?
  • A. A type of memory
  • B. A model of computation representing states and transitions
  • C. A method for data storage
  • D. A programming language
Q. What is a Programmable Logic Device (PLD)?
  • A. A device that can be programmed to perform specific logic functions
  • B. A fixed-function logic device
  • C. A type of microcontroller
  • D. A memory storage device
Q. What is a testbench in HDL design?
  • A. A tool for synthesizing hardware
  • B. A simulation environment for testing designs
  • C. A method for debugging code
  • D. A type of HDL syntax
Q. What is aliasing in digital signal processing?
  • A. Loss of data during transmission
  • B. Distortion caused by insufficient sampling rate
  • C. Error in quantization
  • D. Interference from other signals
Q. What is pipelining in microprocessor design?
  • A. A method to increase memory capacity
  • B. A technique to execute multiple instructions simultaneously
  • C. A way to reduce power consumption
  • D. A process for cooling the CPU
Q. What is pipelining in microprocessors?
  • A. A method to increase memory capacity
  • B. A technique to improve instruction throughput
  • C. A way to reduce power consumption
  • D. A process for data encryption
Q. What is quantization in the context of digital signal processing?
  • A. The process of sampling a signal
  • B. The process of converting a continuous signal into a discrete signal
  • C. The process of rounding off values to a finite set of levels
  • D. The process of filtering a signal
Q. What is the base of the hexadecimal number system?
  • A. 2
  • B. 8
  • C. 10
  • D. 16
Q. What is the binary equivalent of the decimal number 10?
  • A. 1010
  • B. 1001
  • C. 1100
  • D. 1110
Q. What is the binary representation of the decimal number 10?
  • A. 1010
  • B. 1001
  • C. 1100
  • D. 1110
Q. What is the binary representation of the decimal number 13?
  • A. 1101
  • B. 1011
  • C. 1110
  • D. 1001
Q. What is the characteristic table of a JK Flip-Flop when both J and K inputs are high?
  • A. No change
  • B. Set
  • C. Reset
  • D. Toggle
Q. What is the decimal equivalent of the binary number 11101?
  • A. 29
  • B. 30
  • C. 31
  • D. 28
Q. What is the decimal equivalent of the binary number 1111?
  • A. 15
  • B. 14
  • C. 13
  • D. 16
Q. What is the decimal equivalent of the binary number 111?
  • A. 5
  • B. 6
  • C. 7
  • D. 8
Q. What is the decimal equivalent of the hexadecimal number A3?
  • A. 163
  • B. 160
  • C. 165
  • D. 168
Q. What is the decimal equivalent of the octal number 17?
  • A. 15
  • B. 14
  • C. 13
  • D. 16
Q. What is the difference between a momentary switch and a latching switch?
  • A. Momentary switches stay on until released, latching switches do not
  • B. Latching switches stay on until released, momentary switches do not
  • C. Both are the same
  • D. Momentary switches are used for high power, latching switches are not
Q. What is the duty cycle of a 555 timer configured in astable mode?
  • A. 50%
  • B. 33%
  • C. 25%
  • D. Depends on resistor values
Q. What is the effect of a 'shift left' operation on a binary number?
  • A. It multiplies the number by 2
  • B. It divides the number by 2
  • C. It adds a zero to the end
  • D. It reverses the number
Q. What is the effect of a left shift operation on a binary number?
  • A. It multiplies the number by 2
  • B. It divides the number by 2
  • C. It adds 1 to the number
  • D. It subtracts 1 from the number
Q. What is the effect of increasing the resistance in the timing circuit of an astable 555 timer?
  • A. Increases the frequency
  • B. Decreases the frequency
  • C. No effect on frequency
  • D. Increases the duty cycle
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