Q. What happens to the bits in a shift register when a shift operation is performed?
-
A.
They are deleted
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B.
They are copied
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C.
They are shifted to the next position
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D.
They are reversed
Solution
During a shift operation, the bits in a shift register are shifted to the next position, either left or right.
Correct Answer:
C
— They are shifted to the next position
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Q. What happens to the data in a shift register when it is reset?
-
A.
Data is preserved
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B.
Data is shifted out
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C.
Data is cleared
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D.
Data is inverted
Solution
When a shift register is reset, the data is cleared.
Correct Answer:
C
— Data is cleared
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Q. What happens when the trigger pin of a 555 timer is pulled low in monostable mode?
-
A.
The output goes high
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B.
The output goes low
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C.
The timer resets
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D.
Nothing happens
Solution
Pulling the trigger pin low causes the output to go high for the duration set by the timing components.
Correct Answer:
A
— The output goes high
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Q. What is a characteristic of a serial-in, serial-out (SISO) shift register?
-
A.
Data is input and output in parallel
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B.
Data is input serially and output serially
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C.
Data is input in parallel and output serially
-
D.
Data is stored permanently
Solution
A SISO shift register allows data to be input serially and output serially.
Correct Answer:
B
— Data is input serially and output serially
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Q. What is a common application of MSI circuits?
-
A.
Microprocessors
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B.
Basic resistors
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C.
Capacitors
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D.
Inductors
Solution
MSI circuits are commonly used in microprocessors, where multiple logic functions are required.
Correct Answer:
A
— Microprocessors
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Q. What is a decade counter?
-
A.
A counter that counts from 0 to 9
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B.
A counter that counts from 0 to 15
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C.
A counter that counts in binary
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D.
A counter that counts in hexadecimal
Solution
A decade counter counts from 0 to 9, which is a total of 10 states.
Correct Answer:
A
— A counter that counts from 0 to 9
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Q. What is a disadvantage of TTL logic families?
-
A.
High power consumption
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B.
Low noise immunity
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C.
High cost
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D.
Low speed
Solution
TTL logic families generally have higher power consumption compared to CMOS, making them less suitable for low-power applications.
Correct Answer:
A
— High power consumption
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Q. What is a disadvantage of using CMOS logic?
-
A.
High power consumption
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B.
Slow switching speed
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C.
Susceptibility to noise
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D.
Complex fabrication process
Solution
CMOS technology can be complex to fabricate due to the need for both n-type and p-type transistors.
Correct Answer:
D
— Complex fabrication process
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Q. What is a finite state machine (FSM) in digital design?
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A.
A type of memory
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B.
A model of computation representing states and transitions
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C.
A method for data storage
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D.
A programming language
Solution
A finite state machine (FSM) is a model of computation that represents states and transitions based on input conditions.
Correct Answer:
B
— A model of computation representing states and transitions
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Q. What is a Programmable Logic Device (PLD)?
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A.
A device that can be programmed to perform specific logic functions
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B.
A fixed-function logic device
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C.
A type of microcontroller
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D.
A memory storage device
Solution
A PLD is a device that can be programmed to perform specific logic functions, allowing for custom logic designs.
Correct Answer:
A
— A device that can be programmed to perform specific logic functions
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Q. What is a testbench in HDL design?
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A.
A tool for synthesizing hardware
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B.
A simulation environment for testing designs
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C.
A method for debugging code
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D.
A type of HDL syntax
Solution
A testbench is a simulation environment used to test and verify the functionality of HDL designs.
Correct Answer:
B
— A simulation environment for testing designs
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Q. What is aliasing in digital signal processing?
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A.
Loss of data during transmission
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B.
Distortion caused by insufficient sampling rate
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C.
Error in quantization
-
D.
Interference from other signals
Solution
Aliasing occurs when a signal is sampled at a rate lower than twice its highest frequency, causing different signals to become indistinguishable.
Correct Answer:
B
— Distortion caused by insufficient sampling rate
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Q. What is pipelining in microprocessor design?
-
A.
A method to increase memory capacity
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B.
A technique to execute multiple instructions simultaneously
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C.
A way to reduce power consumption
-
D.
A process for cooling the CPU
Solution
Pipelining is a technique used in microprocessor design to execute multiple instructions simultaneously by overlapping the execution stages.
Correct Answer:
B
— A technique to execute multiple instructions simultaneously
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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
Solution
Pipelining is a technique used in microprocessors to improve instruction throughput by overlapping the execution of multiple instructions.
Correct Answer:
B
— A technique to improve instruction throughput
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Q. What is quantization in the context of digital signal processing?
-
A.
The process of sampling a signal
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B.
The process of converting a continuous signal into a discrete signal
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C.
The process of rounding off values to a finite set of levels
-
D.
The process of filtering a signal
Solution
Quantization is the process of mapping a continuous range of values into a finite range of discrete values.
Correct Answer:
C
— The process of rounding off values to a finite set of levels
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Q. What is the base of the hexadecimal number system?
Solution
The base of the hexadecimal number system is 16.
Correct Answer:
D
— 16
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Q. What is the binary equivalent of the decimal number 10?
-
A.
1010
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B.
1001
-
C.
1100
-
D.
1110
Solution
The binary equivalent of the decimal number 10 is 1010.
Correct Answer:
A
— 1010
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Q. What is the binary representation of the decimal number 10?
-
A.
1010
-
B.
1001
-
C.
1100
-
D.
1110
Solution
The binary representation of 10 is 1010.
Correct Answer:
A
— 1010
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Q. What is the binary representation of the decimal number 13?
-
A.
1101
-
B.
1011
-
C.
1110
-
D.
1001
Solution
The decimal number 13 is represented as 1101 in binary.
Correct Answer:
A
— 1101
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Q. What is the characteristic table of a JK Flip-Flop when both J and K inputs are high?
-
A.
No change
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B.
Set
-
C.
Reset
-
D.
Toggle
Solution
When both J and K inputs are high, the JK Flip-Flop toggles its output state.
Correct Answer:
D
— Toggle
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Q. What is the decimal equivalent of the binary number 11101?
Solution
The binary number 11101 is equivalent to 29 in decimal.
Correct Answer:
A
— 29
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Q. What is the decimal equivalent of the binary number 1111?
Solution
1111 in binary equals 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0 = 15.
Correct Answer:
A
— 15
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Q. What is the decimal equivalent of the binary number 111?
Solution
The binary number 111 is equal to 7 in decimal.
Correct Answer:
C
— 7
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Q. What is the decimal equivalent of the hexadecimal number A3?
-
A.
163
-
B.
160
-
C.
165
-
D.
168
Solution
A3 in hexadecimal is equal to 163 in decimal.
Correct Answer:
A
— 163
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Q. What is the decimal equivalent of the octal number 17?
Solution
17 in octal equals 1*8^1 + 7*8^0 = 15.
Correct Answer:
A
— 15
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Q. What is the difference between a momentary switch and a latching switch?
-
A.
Momentary switches stay on until released, latching switches do not
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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
Solution
A latching switch remains in its last position until manually changed, while a momentary switch only stays on while pressed.
Correct Answer:
B
— Latching switches stay on until released, momentary switches do not
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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
Solution
The duty cycle in astable mode depends on the resistor and capacitor values used in the circuit.
Correct Answer:
D
— Depends on resistor values
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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
Solution
A 'shift left' operation on a binary number effectively multiplies the number by 2.
Correct Answer:
A
— It multiplies the number by 2
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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
Solution
A left shift operation on a binary number effectively multiplies the number by 2.
Correct Answer:
A
— It multiplies the number by 2
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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
Solution
Increasing the resistance in the timing circuit of an astable 555 timer decreases the frequency of the output waveform.
Correct Answer:
B
— Decreases the frequency
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