Q. In ER modeling, what does a diamond shape represent?
-
A.
Entity
-
B.
Attribute
-
C.
Relationship
-
D.
Weak entity
Solution
In ER modeling, a diamond shape represents a relationship between entities.
Correct Answer:
C
— Relationship
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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 JDBC, which method is used to execute a SQL statement?
-
A.
executeQuery()
-
B.
runQuery()
-
C.
executeSQL()
-
D.
executeStatement()
Solution
In JDBC, the method used to execute a SQL statement is 'executeQuery()'.
Correct Answer:
A
— executeQuery()
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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 object-oriented data modeling, what is an 'object'?
-
A.
A collection of data and methods
-
B.
A single data entry in a database
-
C.
A type of database schema
-
D.
A relationship between entities
Solution
In object-oriented data modeling, an object is a collection of data and methods that operate on that data.
Correct Answer:
A
— A collection of data and methods
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Q. In Object-Oriented Databases, what does 'inheritance' allow?
-
A.
Creating new classes based on existing ones
-
B.
Storing data in a flat structure
-
C.
Using only primitive data types
-
D.
Eliminating the need for relationships
Solution
Inheritance allows for creating new classes based on existing ones, promoting code reuse and organization.
Correct Answer:
A
— Creating new classes based on existing ones
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Q. In OSPF, what is the purpose of the Area ID?
-
A.
To identify the router
-
B.
To segment the network
-
C.
To define the metric
-
D.
To establish neighbor relationships
Solution
The Area ID in OSPF is used to segment the network into areas, which helps in reducing routing table size and improving efficiency.
Correct Answer:
B
— To segment the network
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Q. In semiconductor physics, what happens to the current in a parallel diode configuration when the temperature increases?
-
A.
Current decreases
-
B.
Current remains constant
-
C.
Current increases
-
D.
Current becomes zero
Solution
In a parallel diode configuration, as the temperature increases, the current typically increases due to reduced barrier potential.
Correct Answer:
C
— Current increases
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Q. In semiconductor physics, what happens to the resistance of a diode when it is forward-biased?
-
A.
Resistance increases
-
B.
Resistance decreases
-
C.
Resistance remains constant
-
D.
Resistance becomes infinite
Solution
When a diode is forward-biased, its resistance decreases, allowing current to flow easily.
Correct Answer:
B
— Resistance decreases
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Q. In semiconductor physics, what happens to the resistance of a diode when it is forward-biased in a series circuit?
-
A.
Resistance increases
-
B.
Resistance decreases
-
C.
Resistance remains constant
-
D.
Resistance becomes infinite
Solution
When a diode is forward-biased, its resistance decreases, allowing current to flow easily through the series circuit.
Correct Answer:
B
— Resistance decreases
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Q. In semiconductor physics, what is a p-n junction?
-
A.
A type of transistor
-
B.
A boundary between p-type and n-type materials
-
C.
A method of signal modulation
-
D.
A type of capacitor
Solution
A p-n junction is the interface between p-type and n-type semiconductor materials, crucial for diode operation.
Correct Answer:
B
— A boundary between p-type and n-type materials
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Q. In semiconductor physics, what is the purpose of doping?
-
A.
To increase the thermal conductivity
-
B.
To create p-type or n-type materials
-
C.
To enhance the mechanical strength
-
D.
To reduce the energy band gap
Solution
Doping introduces impurities into a semiconductor to create p-type or n-type materials, enhancing conductivity.
Correct Answer:
B
— To create p-type or n-type materials
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Q. In semiconductor physics, what is the term for the energy gap between the valence band and the conduction band?
-
A.
Fermi level
-
B.
Band gap
-
C.
Conductivity
-
D.
Doping level
Solution
The band gap is the energy difference between the valence band and the conduction band in semiconductors.
Correct Answer:
B
— Band gap
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Q. In small-signal analysis, what is the purpose of the small-signal model?
-
A.
To analyze large signal behavior
-
B.
To simplify circuit analysis for small variations
-
C.
To determine thermal characteristics
-
D.
To calculate power dissipation
Solution
The small-signal model is used to simplify circuit analysis for small variations around a bias point.
Correct Answer:
B
— To simplify circuit analysis for small variations
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Q. In small-signal analysis, what is the small-signal model of a BJT primarily used for?
-
A.
To analyze large signal behavior
-
B.
To simplify circuit analysis
-
C.
To determine thermal characteristics
-
D.
To measure frequency response
Solution
The small-signal model of a BJT simplifies circuit analysis by allowing linear approximations of the transistor's behavior.
Correct Answer:
B
— To simplify circuit analysis
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Q. In small-signal analysis, what is the small-signal model used for?
-
A.
To analyze large signal behavior
-
B.
To simplify the analysis of nonlinear devices
-
C.
To predict the behavior of linear circuits under small perturbations
-
D.
To measure power consumption
Solution
The small-signal model is used to predict the behavior of linear circuits when small perturbations are applied.
Correct Answer:
C
— To predict the behavior of linear circuits under small perturbations
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Q. In small-signal models, how is a capacitor 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 open circuits at DC steady state.
Correct Answer:
A
— As an open circuit
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Q. In small-signal models, what does the small-signal parameter 'gm' represent for BJTs?
-
A.
Transconductance
-
B.
Input resistance
-
C.
Output resistance
-
D.
Current gain
Solution
'gm' represents transconductance, which is the ratio of the change in output current to the change in input voltage.
Correct Answer:
A
— Transconductance
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Q. In small-signal models, what does the term 'RL circuit' refer to?
-
A.
A circuit with resistors and capacitors
-
B.
A circuit with resistors and inductors
-
C.
A circuit with diodes and transistors
-
D.
A circuit with only resistors
Solution
An RL circuit consists of resistors (R) and inductors (L), which are analyzed in small-signal models for their response to small input signals.
Correct Answer:
B
— A circuit with resistors and inductors
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Q. In small-signal models, what does the term 'small-signal' refer to?
-
A.
High-frequency signals
-
B.
Low-frequency signals
-
C.
Small variations around a bias point
-
D.
Signals with low power
Solution
Small-signal refers to small variations around a bias point in a circuit.
Correct Answer:
C
— Small variations around a bias point
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Q. In SQL Server 2000, which command is used to create a new database?
-
A.
CREATE DATABASE
-
B.
NEW DATABASE
-
C.
ADD DATABASE
-
D.
MAKE DATABASE
Solution
The command to create a new database in SQL Server 2000 is 'CREATE DATABASE'.
Correct Answer:
A
— CREATE DATABASE
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Q. In SQL, which clause is used to filter records after grouping?
-
A.
WHERE
-
B.
HAVING
-
C.
GROUP BY
-
D.
ORDER BY
Solution
The HAVING clause is used to filter records after grouping in SQL.
Correct Answer:
B
— HAVING
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Q. In SQL, which command is used to create a new table?
-
A.
INSERT
-
B.
UPDATE
-
C.
CREATE
-
D.
ALTER
Solution
The SQL command 'CREATE' is used to create a new table in the database.
Correct Answer:
C
— CREATE
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Q. In SQL, which command is used to modify existing records in a table?
-
A.
UPDATE
-
B.
MODIFY
-
C.
CHANGE
-
D.
ALTER
Solution
The SQL command used to modify existing records in a table is 'UPDATE'.
Correct Answer:
A
— UPDATE
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Q. In STP, what is the purpose of the port states?
-
A.
To define the speed of the port
-
B.
To determine the role of the port in the topology
-
C.
To manage IP address assignments
-
D.
To encrypt data on the port
Solution
Port states in STP (Blocking, Listening, Learning, Forwarding) determine the role of the port in the network topology.
Correct Answer:
B
— To determine the role of the port in the topology
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Q. In STP, what is the significance of the Bridge ID?
-
A.
It uniquely identifies a switch in the network
-
B.
It determines the speed of the connection
-
C.
It manages VLAN assignments
-
D.
It encrypts the data packets
Solution
The Bridge ID uniquely identifies a switch in the network and is used in the STP calculations.
Correct Answer:
A
— It uniquely identifies a switch in the network
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Q. In STP, which device is elected as the root bridge?
-
A.
The device with the highest MAC address
-
B.
The device with the lowest MAC address
-
C.
The device with the highest bandwidth
-
D.
The device with the lowest bridge ID
Solution
The root bridge is elected based on the lowest bridge ID, which is a combination of bridge priority and MAC address.
Correct Answer:
D
— The device with the lowest bridge ID
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Q. In subnetting, what does the term 'supernetting' refer to?
-
A.
Combining multiple subnets into a larger network
-
B.
Dividing a network into smaller subnets
-
C.
Changing the subnet mask
-
D.
None of the above
Solution
Supernetting refers to the practice of combining multiple smaller subnets into a larger network to reduce the size of routing tables.
Correct Answer:
A
— Combining multiple subnets into a larger network
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Q. In TCP/IP, which layer corresponds to the OSI Network Layer?
-
A.
Application Layer
-
B.
Transport Layer
-
C.
Internet Layer
-
D.
Link Layer
Solution
In the TCP/IP model, the Internet Layer corresponds to the OSI Network Layer, handling routing and addressing.
Correct Answer:
C
— Internet Layer
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