Q. In a series RLC circuit, what happens when the damping ratio is less than 1?
-
A.
The circuit is overdamped
-
B.
The circuit is critically damped
-
C.
The circuit is underdamped
-
D.
The circuit is unstable
Solution
When the damping ratio (ζ) is less than 1 in a series RLC circuit, the circuit is considered underdamped, leading to oscillatory behavior.
Correct Answer:
C
— The circuit is underdamped
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Q. In a series-parallel circuit, how does a BJT operate when used as a switch?
-
A.
In cutoff mode, it conducts current
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B.
In saturation mode, it blocks current
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C.
In saturation mode, it conducts current
-
D.
In active mode, it blocks current
Solution
A BJT operates in saturation mode to allow maximum current flow, effectively acting as a closed switch.
Correct Answer:
C
— In saturation mode, it conducts current
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Q. In a series-parallel circuit, what is the effect of connecting multiple diodes in parallel?
-
A.
Increases total voltage
-
B.
Increases total current capacity
-
C.
Decreases total current capacity
-
D.
Has no effect on current
Solution
Connecting multiple diodes in parallel increases the total current capacity of the circuit.
Correct Answer:
B
— Increases total current capacity
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Q. In a shift register, what does the term 'clock pulse' refer to?
-
A.
The speed of data transfer
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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 small-signal model of a parallel circuit, how are the components represented?
-
A.
As linear elements only
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B.
As nonlinear elements only
-
C.
As a combination of linear and nonlinear elements
-
D.
As ideal voltage sources
Solution
In a small-signal model, components are typically represented as linear elements to simplify analysis around a bias point.
Correct Answer:
A
— As linear elements only
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Q. In a small-signal model of a parallel circuit, the output voltage is:
-
A.
The same as the input voltage
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B.
Dependent on the load
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C.
Always zero
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D.
Equal to the sum of the input voltages
Solution
In a small-signal model, the output voltage is dependent on the load and the configuration of the circuit.
Correct Answer:
B
— Dependent on the load
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Q. In a small-signal model, how is a capacitor typically represented?
-
A.
As an open circuit
-
B.
As a short circuit
-
C.
As a resistor
-
D.
As a dependent source
Solution
In small-signal models, capacitors are often represented as short circuits at high frequencies.
Correct Answer:
B
— As a short circuit
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Q. In a small-signal model, how is the output voltage related to the input voltage in an RL circuit?
-
A.
Output voltage is always greater than input voltage
-
B.
Output voltage is always less than input voltage
-
C.
Output voltage can be greater or less depending on the circuit configuration
-
D.
Output voltage is independent of input voltage
Solution
In a small-signal model, the output voltage can vary based on the circuit configuration and the values of R and L.
Correct Answer:
C
— Output voltage can be greater or less depending on the circuit configuration
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Q. In a small-signal model, what does the output voltage of an op-amp depend on?
-
A.
Input voltage and feedback
-
B.
Only input voltage
-
C.
Only feedback
-
D.
Power supply voltage
Solution
In a small-signal model, the output voltage of an op-amp depends on both the input voltage and the feedback configuration.
Correct Answer:
A
— Input voltage and feedback
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Q. In a small-signal model, what does the transconductance (gm) of a BJT represent?
-
A.
The input resistance
-
B.
The output resistance
-
C.
The change in output current per change in input voltage
-
D.
The change in input current per change in output voltage
Solution
Transconductance (gm) indicates how much the output current changes in response to a change in input voltage.
Correct Answer:
C
— The change in output current per change in input voltage
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Q. In a small-signal model, what does the transconductance (gm) represent?
-
A.
The change in output voltage per change in input current
-
B.
The change in output current per change in input voltage
-
C.
The change in input voltage per change in output current
-
D.
The change in input current per change in output voltage
Solution
Transconductance (gm) represents the change in output current per change in input voltage in a small-signal model.
Correct Answer:
B
— The change in output current per change in input voltage
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Q. In a star schema, what do the fact tables contain?
-
A.
Dimension attributes
-
B.
Aggregated data
-
C.
Transactional data
-
D.
Metadata
Solution
Fact tables in a star schema contain transactional data that can be analyzed, often including measures and foreign keys to dimension tables.
Correct Answer:
C
— Transactional data
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Q. In a star schema, what do the fact tables represent?
-
A.
Dimensions of the data
-
B.
Aggregated data
-
C.
Transactional data
-
D.
Metadata
Solution
Fact tables in a star schema represent transactional data, containing measurable, quantitative data for analysis.
Correct Answer:
C
— Transactional data
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Q. In a star schema, what type of table is the central fact table surrounded by?
-
A.
Dimension tables
-
B.
Normalization tables
-
C.
Transaction tables
-
D.
Index tables
Solution
In a star schema, the central fact table is surrounded by dimension tables that provide context to the data.
Correct Answer:
A
— Dimension tables
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Q. In a star schema, what type of table is the central fact table?
-
A.
Dimension table
-
B.
Lookup table
-
C.
Aggregate table
-
D.
Fact table
Solution
In a star schema, the central table is the fact table, which contains quantitative data for analysis.
Correct Answer:
D
— Fact table
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Q. In a step-up transformer, the number of turns in the primary coil is:
-
A.
Greater than the secondary coil
-
B.
Less than the secondary coil
-
C.
Equal to the secondary coil
-
D.
None of the above
Solution
In a step-up transformer, the primary coil has fewer turns than the secondary coil.
Correct Answer:
B
— Less than the secondary coil
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Q. In a summing amplifier configuration, what is the role of the feedback resistor?
-
A.
To set the gain of the amplifier
-
B.
To provide stability
-
C.
To determine the input impedance
-
D.
To filter noise
Solution
The feedback resistor in a summing amplifier sets the gain of the amplifier for the summed inputs.
Correct Answer:
A
— To set the gain of the amplifier
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Q. In a summing amplifier using an op-amp, what is the output voltage if the inputs are 2V and 3V with equal resistors?
-
A.
5V
-
B.
2.5V
-
C.
1V
-
D.
0V
Solution
In a summing amplifier with equal resistors, the output voltage is the average of the inputs, which is 2.5V.
Correct Answer:
B
— 2.5V
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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 thyristor, what is the role of the gate terminal?
-
A.
To provide a path for current
-
B.
To control the turn-on of the device
-
C.
To dissipate heat
-
D.
To connect to the load
Solution
The gate terminal is used to trigger the thyristor into conduction.
Correct Answer:
B
— To control the turn-on of the device
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Q. In a transformer, the turns ratio determines what?
-
A.
The efficiency of the transformer
-
B.
The frequency of the output signal
-
C.
The voltage transformation ratio
-
D.
The power rating of the transformer
Solution
The turns ratio of a transformer determines the voltage transformation ratio.
Correct Answer:
C
— The voltage transformation ratio
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Q. In a transformer, what role does the inductor play?
-
A.
It converts AC to DC
-
B.
It stores energy
-
C.
It transfers energy between circuits
-
D.
It filters signals
Solution
In a transformer, the inductor transfers energy between circuits through electromagnetic induction.
Correct Answer:
C
— It transfers energy between circuits
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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 ADO.NET, which class is used to represent a connection to a database?
-
A.
SqlConnection
-
B.
SqlCommand
-
C.
SqlDataAdapter
-
D.
SqlDataReader
Solution
SqlConnection class is used to establish a connection to a SQL Server database in ADO.NET.
Correct Answer:
A
— SqlConnection
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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 Entity-Relationship (ER) model, what does a diamond shape represent?
-
A.
Entity
-
B.
Attribute
-
C.
Relationship
-
D.
Weak entity
Solution
In an ER model, a diamond shape represents a relationship between entities.
Correct Answer:
C
— Relationship
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Q. In an Entity-Relationship (ER) model, what does an entity represent?
-
A.
A relationship between two tables
-
B.
A single piece of data
-
C.
A real-world object or concept
-
D.
A database transaction
Solution
In an ER model, an entity represents a real-world object or concept that can have data stored about it.
Correct Answer:
C
— A real-world object or concept
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Q. In an ER diagram, how is a multi-valued attribute represented?
-
A.
As a rectangle
-
B.
As an oval
-
C.
As a double oval
-
D.
As a diamond
Solution
A multi-valued attribute is represented as a double oval in an ER diagram.
Correct Answer:
C
— As a double oval
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Q. In an ER diagram, how is a primary key typically represented?
-
A.
Underlined text
-
B.
Bold text
-
C.
Italicized text
-
D.
In a different color
Solution
A primary key is typically represented by underlined text in an ER diagram.
Correct Answer:
A
— Underlined text
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