Q. In a PLD, what does the term 'logic array' refer to?
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A.
A collection of resistors
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B.
A matrix of programmable connections
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C.
A type of diode configuration
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D.
A series of capacitors
Solution
The logic array in a PLD is a matrix of programmable connections that can be configured to implement various logic functions.
Correct Answer:
B
— A matrix of programmable connections
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Q. In a PLD, what is the role of the logic array?
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A.
To store data
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B.
To perform arithmetic operations
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C.
To implement logic functions
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D.
To amplify signals
Solution
The logic array in a PLD is responsible for implementing the desired logic functions based on the user's configuration.
Correct Answer:
C
— To implement logic functions
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Q. What does the term 'programmable' in PLD refer to?
-
A.
The ability to amplify signals
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B.
The ability to change the circuit configuration
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C.
The ability to rectify signals
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D.
The ability to store energy
Solution
The term 'programmable' indicates that the device can be configured by the user to perform specific logic functions.
Correct Answer:
B
— The ability to change the circuit configuration
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Q. What is the main advantage of using a PLD over traditional logic circuits?
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A.
Lower cost
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B.
Higher power consumption
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C.
Increased design time
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D.
Flexibility in design
Solution
PLDs offer flexibility in design, allowing for quick changes and adaptations compared to traditional fixed logic circuits.
Correct Answer:
D
— Flexibility in design
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Q. What is the main advantage of using PLDs over fixed logic devices?
-
A.
Lower cost
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B.
Higher speed
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C.
Flexibility in design
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D.
Simplicity of use
Solution
PLDs offer flexibility in design, allowing users to modify the logic functions as needed.
Correct Answer:
C
— Flexibility in design
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Q. What is the primary function of a Programmable Logic Device (PLD)?
-
A.
To amplify signals
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B.
To perform logic operations
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C.
To rectify AC to DC
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D.
To store data
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 use of a CPLD in digital circuits?
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A.
To amplify signals
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B.
To perform simple logic functions
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C.
To implement complex algorithms
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D.
To store large amounts of data
Solution
CPLDs are primarily used to perform simple logic functions in digital circuits.
Correct Answer:
B
— To perform simple logic functions
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Q. What is the primary use of a diode in a PLD?
-
A.
To amplify signals
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B.
To provide logic functions
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C.
To isolate different sections
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D.
To rectify power supply
Solution
Diodes in PLDs are used to provide logic functions by controlling the flow of signals.
Correct Answer:
B
— To provide logic functions
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Q. What is the role of a fuse in a programmable logic device?
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A.
To amplify signals
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B.
To store data
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C.
To create permanent connections
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D.
To rectify AC signals
Solution
Fuses in PLDs are used to create permanent connections in the logic array after programming.
Correct Answer:
C
— To create permanent connections
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Q. What is the significance of 'logic density' in PLDs?
-
A.
It refers to the power consumption
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B.
It indicates the number of logic gates per unit area
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C.
It measures the speed of operation
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D.
It defines the programming time
Solution
Logic density refers to the number of logic gates that can be integrated into a given area of the PLD, impacting its complexity and capability.
Correct Answer:
B
— It indicates the number of logic gates per unit area
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Q. What type of logic function can be implemented using a PLD?
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A.
Only AND functions
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B.
Only OR functions
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C.
Any combinational logic function
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D.
Only sequential logic functions
Solution
PLDs can implement any combinational logic function, making them versatile for various applications.
Correct Answer:
C
— Any combinational logic function
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Q. Which component is commonly used to implement logic gates in a PLD?
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A.
Resistor
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B.
Capacitor
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C.
Transistor
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D.
Inductor
Solution
Transistors are used to implement logic gates in PLDs, allowing for the creation of complex logic functions.
Correct Answer:
C
— Transistor
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Q. Which of the following describes the architecture of a typical FPGA?
-
A.
Fixed logic gates only
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B.
Configurable logic blocks and interconnects
-
C.
Analog components only
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D.
Discrete components only
Solution
FPGAs consist of configurable logic blocks and interconnects that allow for flexible circuit design.
Correct Answer:
B
— Configurable logic blocks and interconnects
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Q. Which of the following is a type of Programmable Logic Device?
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A.
BJT
-
B.
FET
-
C.
FPGA
-
D.
Diode
Solution
FPGA (Field Programmable Gate Array) is a type of PLD that can be programmed to perform various logic functions.
Correct Answer:
C
— FPGA
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Q. Which of the following is NOT a characteristic of PLDs?
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A.
Reprogrammable
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B.
High integration density
-
C.
Fixed functionality
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D.
Customizable logic
Solution
Fixed functionality is not a characteristic of PLDs; they are designed to be reprogrammable and customizable.
Correct Answer:
C
— Fixed functionality
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Q. Which of the following PLDs is known for its ability to handle complex logic functions?
-
A.
PAL
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B.
PLA
-
C.
FPGA
-
D.
CPLD
Solution
FPGAs are known for their ability to handle complex logic functions due to their large number of configurable logic blocks.
Correct Answer:
C
— FPGA
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Q. Which type of PLD allows for the most flexibility in programming?
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A.
PAL
-
B.
PLA
-
C.
FPGA
-
D.
CPLD
Solution
FPGAs (Field Programmable Gate Arrays) offer the highest flexibility in programming compared to other types of PLDs.
Correct Answer:
C
— FPGA
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