Q. In a 4-bit binary counter, what is the maximum count it can reach?
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Solution
A 4-bit binary counter can represent values from 0 to 15, making the maximum count 15.
Correct Answer:
A
— 15
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Q. In a 4-bit binary number, what is the maximum decimal value it can represent?
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Solution
A 4-bit binary number can represent values from 0 to 15, so the maximum is 15.
Correct Answer:
A
— 15
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Q. In a 4-bit shift register, how many bits can it hold?
A.
2 bits
B.
4 bits
C.
8 bits
D.
16 bits
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Solution
A 4-bit shift register can hold exactly 4 bits of data.
Correct Answer:
B
— 4 bits
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Q. In a 4-to-1 multiplexer, how many select lines are required?
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Solution
A 4-to-1 multiplexer requires 2 select lines to choose one of the four input lines.
Correct Answer:
B
— 2
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Q. In a 555 timer circuit, what does the threshold pin do?
A.
Resets the timer
B.
Sets the output high
C.
Detects when the capacitor voltage exceeds a certain level
D.
Controls the timing interval
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Solution
The threshold pin detects when the capacitor voltage exceeds 2/3 of the supply voltage, which affects the output state.
Correct Answer:
C
— Detects when the capacitor voltage exceeds a certain level
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Q. In a 555 timer configured as a monostable multivibrator, what triggers the output pulse?
A.
A high signal
B.
A low signal
C.
A falling edge
D.
A rising edge
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Solution
A monostable 555 timer is triggered by a falling edge on the trigger pin, which causes the output to go high for a specified duration.
Correct Answer:
D
— A rising edge
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Q. In a 555 timer, what is the purpose of the discharge pin (Pin 7)?
A.
To trigger the timer
B.
To reset the timer
C.
To discharge the timing capacitor
D.
To provide power to the timer
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Solution
The discharge pin (Pin 7) is used to discharge the timing capacitor when the output goes low, allowing the timer to reset for the next cycle.
Correct Answer:
C
— To discharge the timing capacitor
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Q. In a basic inverting op-amp circuit, if Rf is 10kΩ and Rin is 1kΩ, what is the gain?
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Solution
The gain of an inverting op-amp is given by -Rf/Rin, which in this case is -10.
Correct Answer:
A
— -10
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Q. In a basic inverting op-amp configuration, what is the relationship between the input and output voltages?
A.
Vout = Vin
B.
Vout = -Vin
C.
Vout = Vin/2
D.
Vout = Vin + 1
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Solution
In a basic inverting op-amp configuration, the output voltage is the negative of the input voltage (Vout = -Vin).
Correct Answer:
B
— Vout = -Vin
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Q. In a basic summing amplifier configuration, what does the output voltage depend on?
A.
The sum of the input voltages
B.
The product of the input voltages
C.
The difference of the input voltages
D.
The average of the input voltages
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Solution
In a basic summing amplifier configuration, the output voltage depends on the sum of the input voltages.
Correct Answer:
A
— The sum of the input voltages
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Q. In a binary counter, what is the maximum count for a 3-bit counter?
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Solution
A 3-bit counter can represent values from 0 to 7, which is a total of 8 states.
Correct Answer:
A
— 7
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Q. In a binary counter, what is the maximum count for a 4-bit counter?
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Solution
The maximum count for a 4-bit counter is 2^4 - 1 = 15.
Correct Answer:
A
— 15
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Q. In a binary to decimal converter, what is the decimal equivalent of the binary number 1011?
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Solution
The binary number 1011 is equal to 1*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 8 + 0 + 2 + 1 = 11.
Correct Answer:
C
— 11
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Q. In a bipolar junction transistor (BJT), what are the three regions called?
A.
Emitter, Base, Collector
B.
Source, Gate, Drain
C.
Anode, Cathode, Gate
D.
Source, Base, Collector
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Solution
A BJT consists of three regions: Emitter, Base, and Collector, which are essential for its operation in memory applications.
Correct Answer:
A
— Emitter, Base, Collector
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Q. In a bistable multivibrator using a 555 timer, how is the output state changed?
A.
By changing the power supply
B.
By triggering the reset pin
C.
By applying a trigger to the trigger pin
D.
By connecting a capacitor
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Solution
In a bistable multivibrator, the output state is changed by applying a trigger to the trigger pin.
Correct Answer:
C
— By applying a trigger to the trigger pin
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Q. In a BJT, if the base current is increased, what happens to the collector current according to Ohm's Law?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It becomes zero
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Solution
In a BJT, increasing the base current leads to an increase in collector current, following the principle of current amplification.
Correct Answer:
C
— It increases
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Q. In a BJT, what is the region called when it is biased in the active mode?
A.
Cut-off
B.
Saturation
C.
Active
D.
Reverse
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Solution
In the active mode, a BJT operates in the active region where it can amplify signals.
Correct Answer:
C
— Active
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Q. In a BJT, what is the role of the base terminal?
A.
To collect charge carriers
B.
To control the current flow
C.
To provide power
D.
To dissipate heat
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Solution
The base terminal of a BJT controls the current flow between the collector and emitter by allowing a small input current to control a larger output current.
Correct Answer:
B
— To control the current flow
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Q. In a BJT, which terminal is the control terminal?
A.
Emitter
B.
Collector
C.
Base
D.
Gate
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Solution
The base terminal is the control terminal in a BJT, as it controls the current flow between the collector and emitter.
Correct Answer:
C
— Base
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Q. In a capacitor, what does the term 'capacitance' refer to?
A.
The ability to resist current
B.
The ability to store charge per unit voltage
C.
The ability to conduct electricity
D.
The ability to dissipate heat
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Solution
Capacitance is defined as the amount of charge stored per unit voltage across the capacitor.
Correct Answer:
B
— The ability to store charge per unit voltage
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Q. In a circuit with an Ex-OR gate, if both inputs are 0, what is the output?
A.
1
B.
0
C.
Undefined
D.
Both 0 and 1
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Solution
The output of an Ex-OR gate is 0 when both inputs are 0.
Correct Answer:
B
— 0
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Q. In a circuit with an inductor, what is the time constant defined as?
A.
L/R
B.
R/L
C.
L*R
D.
R+L
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Solution
The time constant for an inductor is defined as L/R, where L is inductance and R is resistance.
Correct Answer:
A
— L/R
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Q. In a circuit, if the Ex-OR gate has inputs A=1 and B=1, what will be the output?
A.
1
B.
0
C.
Undefined
D.
Both 0 and 1
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Solution
The Ex-OR gate outputs 0 when both inputs are the same, which is 1 in this case.
Correct Answer:
B
— 0
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Q. In a circuit, if the inputs to an Ex-NOR gate are both 1, what is the output?
A.
0
B.
1
C.
Depends on the circuit
D.
Undefined
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Solution
The output of an Ex-NOR gate is 1 when both inputs are 1.
Correct Answer:
B
— 1
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Q. In a circuit, what is the purpose of a signal?
A.
To provide power
B.
To indicate a state or condition
C.
To store data
D.
To increase resistance
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Solution
A signal is used to indicate a state or condition within a circuit, such as on/off or high/low.
Correct Answer:
B
— To indicate a state or condition
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Q. In a client-server architecture, what is the role of the client?
A.
To manage the database and handle requests
B.
To send requests to the server and display results
C.
To store data locally
D.
To perform data backups
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Solution
In a client-server architecture, the client sends requests to the server and displays results.
Correct Answer:
B
— To send requests to the server and display results
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Q. In a client-server architecture, which layer is responsible for the user interface?
A.
Database layer
B.
Application layer
C.
Network layer
D.
Storage layer
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Solution
In a client-server architecture, the application layer is responsible for the user interface.
Correct Answer:
B
— Application layer
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Q. In a client-server database, what role does the server play?
A.
It processes user requests and manages data storage
B.
It only stores data without processing requests
C.
It acts as a client to other servers
D.
It is responsible for user interface design
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Solution
In a client-server database, the server processes user requests and manages data storage.
Correct Answer:
A
— It processes user requests and manages data storage
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Q. In a client-server database, which component is responsible for processing queries?
A.
Client
B.
Server
C.
Database
D.
Network
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Solution
In a client-server database, the server is responsible for processing queries.
Correct Answer:
B
— Server
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Q. In a combinational circuit, what does the term 'propagation delay' refer to?
A.
Time taken for the output to stabilize
B.
Time taken for the input to change
C.
Time taken for the circuit to power on
D.
Time taken for the circuit to reset
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Solution
Propagation delay is the time taken for the output to stabilize after the input has changed.
Correct Answer:
A
— Time taken for the output to stabilize
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