Q. In a full adder, how many inputs does it have?
Solution
A full adder has three inputs: two significant bits and one carry-in bit.
Correct Answer:
C
— 3
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Q. In a half adder, what does the sum output represent?
-
A.
Carry out
-
B.
Logical AND
-
C.
Logical OR
-
D.
XOR of inputs
Solution
The sum output of a half adder represents the XOR of the two input bits.
Correct Answer:
D
— XOR of inputs
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Q. In a monostable 555 timer circuit, what happens when the trigger pin is activated?
-
A.
The output goes high for a short duration
-
B.
The output remains low
-
C.
The output oscillates
-
D.
The timer resets
Solution
When the trigger pin is activated, the output of a monostable 555 timer goes high for a short duration.
Correct Answer:
A
— The output goes high for a short duration
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Q. In a monostable 555 timer, what determines the duration of the output pulse?
-
A.
The supply voltage
-
B.
The value of the timing resistor and capacitor
-
C.
The trigger signal duration
-
D.
The output load
Solution
The duration of the output pulse in a monostable 555 timer is determined by the values of the timing resistor and capacitor.
Correct Answer:
B
— The value of the timing resistor and capacitor
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Q. In a multiplexer, what is the role of the select lines?
-
A.
To determine the output based on input values
-
B.
To store data
-
C.
To provide power
-
D.
To control timing
Solution
Select lines in a multiplexer determine which input line is connected to the output.
Correct Answer:
A
— To determine the output based on input values
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Q. In a ring counter, how many states does it have if it has 4 flip-flops?
Solution
A ring counter with 4 flip-flops has 4 unique states.
Correct Answer:
A
— 4
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Q. In a serial-in parallel-out shift register, how is data entered?
-
A.
All at once
-
B.
One bit at a time
-
C.
In groups of four
-
D.
In reverse order
Solution
Data is entered one bit at a time in a serial-in parallel-out shift register.
Correct Answer:
B
— One bit at a time
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Q. In a shift register, what does the term 'clock pulse' refer to?
-
A.
The speed of data transfer
-
B.
The timing signal that controls shifting
-
C.
The amount of data stored
-
D.
The type of shift register
Solution
A clock pulse is a timing signal that controls when the data is shifted in a shift register.
Correct Answer:
B
— The timing signal that controls shifting
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Q. In a T Flip-Flop, what does the T input control?
-
A.
The output state
-
B.
The clock frequency
-
C.
The reset condition
-
D.
The data input
Solution
The T input in a T Flip-Flop controls whether the output state toggles or remains the same on each clock pulse.
Correct Answer:
A
— The output state
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Q. In a truth table, how many rows are there for a circuit with 3 inputs?
Solution
A circuit with 3 inputs has 2^3 = 8 rows in its truth table.
Correct Answer:
C
— 8
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Q. In a truth table, how many rows does a 3-input logic gate have?
Solution
A 3-input logic gate has 2^3 = 8 rows in its truth table.
Correct Answer:
C
— 8
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Q. In an astable multivibrator, what determines the frequency of oscillation?
-
A.
The resistor values only
-
B.
The capacitor value only
-
C.
Both resistor and capacitor values
-
D.
The power supply voltage
Solution
The frequency of oscillation in an astable multivibrator is determined by both the resistor and capacitor values.
Correct Answer:
C
— Both resistor and capacitor values
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Q. In an integrated circuit, what does the term 'die' refer to?
-
A.
The entire circuit board
-
B.
The individual chip of silicon
-
C.
The packaging of the IC
-
D.
The power supply
Solution
A 'die' refers to the individual piece of silicon that contains the integrated circuit.
Correct Answer:
B
— The individual chip of silicon
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Q. In an MSI circuit, what is the typical number of gates integrated?
-
A.
1-10
-
B.
10-100
-
C.
100-1000
-
D.
1000-10000
Solution
MSI circuits typically integrate between 10 to 100 gates on a single chip.
Correct Answer:
B
— 10-100
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Q. In an SR Flip-Flop, what condition is considered invalid?
-
A.
S=0, R=0
-
B.
S=1, R=0
-
C.
S=0, R=1
-
D.
S=1, R=1
Solution
The condition S=1 and R=1 is invalid for an SR Flip-Flop as it leads to an indeterminate state.
Correct Answer:
D
— S=1, R=1
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Q. In an SR flip-flop, what condition leads to an invalid state?
-
A.
S=0, R=0
-
B.
S=1, R=0
-
C.
S=0, R=1
-
D.
S=1, R=1
Solution
The condition S=1 and R=1 leads to an invalid state in an SR flip-flop, as it creates an ambiguous output.
Correct Answer:
D
— S=1, R=1
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Q. In astable mode, how many output states does a 555 timer have?
Solution
In astable mode, the 555 timer continuously oscillates between two output states: high and low.
Correct Answer:
B
— 2
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Q. In digital circuits, what does the term 'logic level' refer to?
-
A.
Voltage levels
-
B.
Frequency levels
-
C.
Temperature levels
-
D.
Current levels
Solution
Logic level refers to the voltage levels that represent binary values (0 and 1) in digital circuits.
Correct Answer:
A
— Voltage levels
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Q. In digital circuits, what does the term 'two's complement' refer to?
-
A.
A method for binary addition
-
B.
A method for binary subtraction
-
C.
A way to represent negative numbers
-
D.
A type of logic gate
Solution
Two's complement is a method used to represent negative numbers in binary.
Correct Answer:
C
— A way to represent negative numbers
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Q. In digital design, what does FPGA stand for?
-
A.
Field Programmable Gate Array
-
B.
Fast Programmable Gate Array
-
C.
Field Programmable General Array
-
D.
Fixed Programmable Gate Array
Solution
FPGA stands for Field Programmable Gate Array, which can be configured by the user after manufacturing.
Correct Answer:
A
— Field Programmable Gate Array
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Q. In digital signal processing, what is aliasing?
-
A.
Loss of data during transmission
-
B.
Distortion that occurs when a signal is undersampled
-
C.
The process of converting digital to analog
-
D.
A method of noise reduction
Solution
Aliasing occurs when a signal is undersampled, causing different signals to become indistinguishable from one another in the sampled data.
Correct Answer:
B
— Distortion that occurs when a signal is undersampled
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Q. In HDL, what does the term 'sensitivity list' refer to?
-
A.
A list of variables to be optimized
-
B.
A list of signals that trigger an event
-
C.
A list of modules in a design
-
D.
A list of test cases
Solution
The sensitivity list refers to a list of signals that trigger an event in a process block, determining when the process should execute.
Correct Answer:
B
— A list of signals that trigger an event
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Q. In interfacing, what does PWM stand for?
-
A.
Pulse Width Modulation
-
B.
Pulse Wave Measurement
-
C.
Phase Width Modulation
-
D.
Pulse Wave Modulation
Solution
PWM stands for Pulse Width Modulation, a technique used to control the power delivered to electrical devices.
Correct Answer:
A
— Pulse Width Modulation
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Q. In MSI circuits, what does the term 'fan-out' refer to?
-
A.
Number of inputs
-
B.
Number of outputs a gate can drive
-
C.
Power consumption
-
D.
Size of the circuit
Solution
Fan-out refers to the number of inputs that a single output can drive in a circuit.
Correct Answer:
B
— Number of outputs a gate can drive
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Q. In the context of DSP, what does FFT stand for?
-
A.
Fast Fourier Transform
-
B.
Frequency Filter Technique
-
C.
Fast Filter Transform
-
D.
Fourier Frequency Transform
Solution
FFT stands for Fast Fourier Transform, which is an efficient algorithm to compute the Discrete Fourier Transform (DFT).
Correct Answer:
A
— Fast Fourier Transform
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Q. In the context of DSP, what does the term 'windowing' refer to?
-
A.
The process of filtering a signal
-
B.
The technique of segmenting a signal for analysis
-
C.
The conversion of a signal from analog to digital
-
D.
The adjustment of signal amplitude
Solution
Windowing refers to the technique of segmenting a signal into smaller parts for analysis, often used in FFT applications.
Correct Answer:
B
— The technique of segmenting a signal for analysis
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Q. In Verilog, which keyword is used to define a module?
-
A.
define
-
B.
module
-
C.
entity
-
D.
architecture
Solution
In Verilog, the keyword 'module' is used to define a module, which is a fundamental building block of the design.
Correct Answer:
B
— module
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Q. In Verilog, which operator is used for bitwise AND?
Solution
The '&' operator is used for bitwise AND operations in Verilog.
Correct Answer:
B
— &
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Q. In VHDL, which keyword is used to define a new entity?
-
A.
component
-
B.
entity
-
C.
architecture
-
D.
signal
Solution
The keyword 'entity' is used in VHDL to define a new entity, which represents a hardware component.
Correct Answer:
B
— entity
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Q. In which logic family is the output state determined by the input states without any delay?
-
A.
TTL
-
B.
CMOS
-
C.
Static Logic
-
D.
Dynamic Logic
Solution
Static Logic families provide output states that are determined by input states without any delay.
Correct Answer:
C
— Static Logic
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