Q. What is the primary function of a Programmable Logic Device (PLD)?
A.
To amplify signals
B.
To perform logic operations
C.
To rectify AC to DC
D.
To store data
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Solution
PLDs are used to perform logic operations by allowing users to configure the logic functions.
Correct Answer:
B
— To perform logic operations
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Q. What is the primary function of a rectifier in a circuit?
A.
Convert AC to DC
B.
Amplify signals
C.
Filter noise
D.
Store energy
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Solution
The primary function of a rectifier is to convert alternating current (AC) to direct current (DC).
Correct Answer:
A
— Convert AC to DC
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Q. What is the primary function of a rectifier in semiconductor memory?
A.
To convert AC to DC
B.
To amplify signals
C.
To store charge
D.
To switch signals
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Solution
Rectifiers are used in semiconductor memory to convert alternating current (AC) to direct current (DC), which is necessary for the operation of digital circuits.
Correct Answer:
A
— To convert AC to DC
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Q. What is the primary function of a rectifier?
A.
To convert DC to AC
B.
To convert AC to DC
C.
To amplify signals
D.
To filter noise
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Solution
A rectifier's primary function is to convert alternating current (AC) to direct current (DC).
Correct Answer:
B
— To convert AC to DC
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Q. What is the primary function of a router in a TCP/IP network?
A.
To connect devices within the same network
B.
To forward packets between different networks
C.
To provide wireless connectivity
D.
To manage network traffic
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Solution
A router's primary function is to forward packets between different networks, determining the best path for data.
Correct Answer:
B
— To forward packets between different networks
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Q. What is the primary function of a router in a WAN?
A.
To connect devices within a local network
B.
To filter traffic based on MAC addresses
C.
To route packets between different networks
D.
To provide wireless connectivity
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Solution
A router's primary function in a WAN is to route packets between different networks, enabling communication across the WAN.
Correct Answer:
C
— To route packets between different networks
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Q. What is the primary function of a router?
A.
To connect devices within the same network
B.
To forward data packets between different networks
C.
To provide wireless connectivity
D.
To manage network traffic
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Solution
A router's primary function is to forward data packets between different networks, directing traffic efficiently.
Correct Answer:
B
— To forward data packets between different networks
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Q. What is the primary function of a shift register?
A.
To store data temporarily
B.
To perform arithmetic operations
C.
To convert analog signals to digital
D.
To amplify signals
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Solution
A shift register is primarily used to store data temporarily and shift it in or out serially.
Correct Answer:
A
— To store data temporarily
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Q. What is the primary function of a switch in a WAN?
A.
To connect multiple networks
B.
To filter and forward data packets within a network
C.
To provide internet access
D.
To manage network security
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Solution
In a WAN, a switch primarily connects multiple networks and manages data traffic between them.
Correct Answer:
B
— To filter and forward data packets within a network
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Q. What is the primary function of a switch in an electrical circuit?
A.
To increase voltage
B.
To control the flow of current
C.
To store energy
D.
To convert AC to DC
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Solution
A switch is used to control the flow of current in a circuit by opening or closing the circuit.
Correct Answer:
B
— To control the flow of current
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Q. What is the primary function of a thyristor?
A.
To amplify signals
B.
To rectify AC to DC
C.
To switch electrical power
D.
To regulate voltage
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Solution
Thyristors are primarily used as electronic switches to control power in circuits.
Correct Answer:
C
— To switch electrical power
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Q. What is the primary function of a timer in electronic circuits?
A.
To amplify signals
B.
To measure time intervals
C.
To rectify AC signals
D.
To store data
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Solution
Timers are used in electronic circuits to measure time intervals and generate precise timing signals.
Correct Answer:
B
— To measure time intervals
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Q. What is the primary function of a transistor in an integrated circuit?
A.
To store data
B.
To amplify signals
C.
To provide power
D.
To connect components
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Solution
Transistors are used in integrated circuits primarily to amplify signals, acting as switches or signal modulators.
Correct Answer:
B
— To amplify signals
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Q. What is the primary function of a voltage follower using an op-amp?
A.
To amplify the input voltage
B.
To provide high input impedance and low output impedance
C.
To invert the input signal
D.
To filter high frequencies
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Solution
A voltage follower provides high input impedance and low output impedance, making it ideal for buffering signals.
Correct Answer:
B
— To provide high input impedance and low output impedance
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Q. What is the primary function of a wireless access point?
A.
To route traffic between networks
B.
To connect wired devices to a wireless network
C.
To encrypt data packets
D.
To manage IP addressing
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Solution
A wireless access point connects wired devices to a wireless network, allowing them to communicate with wireless clients.
Correct Answer:
B
— To connect wired devices to a wireless network
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Q. What is the primary function of an analog-to-digital converter (ADC)?
A.
To convert digital signals to analog signals
B.
To amplify analog signals
C.
To convert analog signals to digital signals
D.
To filter analog signals
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Solution
An ADC converts analog signals, which are continuous in nature, into digital signals, which are discrete.
Correct Answer:
C
— To convert analog signals to digital signals
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Q. What is the primary function of an Ex-NOR gate?
A.
To perform addition
B.
To compare two binary values for equality
C.
To invert a signal
D.
To perform logical AND operation
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Solution
The primary function of an Ex-NOR gate is to compare two binary values and output true (1) if they are equal.
Correct Answer:
B
— To compare two binary values for equality
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Q. What is the primary function of an inductor in a circuit?
A.
To store electrical energy in a magnetic field
B.
To convert AC to DC
C.
To amplify signals
D.
To rectify voltage
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Solution
Inductors store electrical energy in a magnetic field when current flows through them.
Correct Answer:
A
— To store electrical energy in a magnetic field
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Q. What is the primary function of an operational amplifier (op-amp) in a circuit?
A.
To amplify voltage
B.
To rectify current
C.
To switch signals
D.
To store energy
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Solution
The primary function of an operational amplifier (op-amp) is to amplify voltage signals.
Correct Answer:
A
— To amplify voltage
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Q. What is the primary function of an XOR gate?
A.
Outputs true if inputs are the same
B.
Outputs true if inputs are different
C.
Inverts the input
D.
Combines inputs
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Solution
An XOR gate outputs true (1) if the inputs are different.
Correct Answer:
B
— Outputs true if inputs are different
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Q. What is the primary function of error control in WANs?
A.
To increase transmission speed
B.
To ensure data integrity during transmission
C.
To manage network congestion
D.
To provide encryption
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Solution
Error control in WANs is primarily focused on ensuring data integrity during transmission by detecting and correcting errors.
Correct Answer:
B
— To ensure data integrity during transmission
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Q. What is the primary function of OLAP in data warehousing?
A.
To perform online transaction processing
B.
To support complex queries and data analysis
C.
To manage data integrity
D.
To facilitate data entry
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Solution
OLAP (Online Analytical Processing) is used in data warehousing to support complex queries and data analysis.
Correct Answer:
B
— To support complex queries and data analysis
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Q. What is the primary function of RAM in a computer system?
A.
To store data permanently
B.
To provide temporary storage for data in use
C.
To manage input and output devices
D.
To execute instructions
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Solution
RAM (Random Access Memory) provides temporary storage for data that is actively being used or processed by the CPU.
Correct Answer:
B
— To provide temporary storage for data in use
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Q. What is the primary function of the CPU in a computer?
A.
To store data permanently
B.
To execute instructions
C.
To manage input and output devices
D.
To provide power to the computer
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Solution
The CPU (Central Processing Unit) is responsible for executing instructions and processing data in a computer.
Correct Answer:
B
— To execute instructions
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Q. What is the primary function of the Transport layer in TCP/IP?
A.
To establish physical connections
B.
To route packets across networks
C.
To provide reliable or unreliable delivery of data
D.
To manage network security
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Solution
The primary function of the Transport layer is to provide reliable or unreliable delivery of data, depending on the protocol used.
Correct Answer:
C
— To provide reliable or unreliable delivery of data
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Q. What is the primary key in a database?
A.
A unique identifier for a record
B.
A foreign key reference
C.
An index for faster searches
D.
A composite of multiple fields
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Solution
A primary key is a unique identifier for a record in a database table, ensuring that no two records have the same key.
Correct Answer:
A
— A unique identifier for a record
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Q. What is the primary key in an entity?
A.
A unique identifier for each record
B.
An attribute that can be null
C.
A foreign key from another entity
D.
An attribute that is not used in relationships
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Solution
The primary key is a unique identifier for each record in an entity.
Correct Answer:
A
— A unique identifier for each record
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Q. What is the primary key in an ER model?
A.
A unique identifier for an entity
B.
A foreign key in another table
C.
An attribute that can be null
D.
A composite of multiple attributes
Show solution
Solution
The primary key is a unique identifier for an entity in an ER model.
Correct Answer:
A
— A unique identifier for an entity
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Q. What is the primary metric used by EIGRP?
A.
Bandwidth
B.
Delay
C.
Load
D.
Reliability
Show solution
Solution
EIGRP primarily uses bandwidth as its metric, but it also considers delay, load, and reliability to calculate the best path.
Correct Answer:
A
— Bandwidth
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Q. What is the primary purpose of a client-server database architecture?
A.
To store data in a single location
B.
To allow multiple clients to access a centralized database
C.
To eliminate the need for a database server
D.
To increase data redundancy
Show solution
Solution
The primary purpose of a client-server database architecture is to allow multiple clients to access a centralized database.
Correct Answer:
B
— To allow multiple clients to access a centralized database
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