Q. What does 'in-system programming' mean in the context of PLDs?
A.
Programming the device while it is installed in the circuit
B.
Programming the device before installation
C.
Updating the software of the device
D.
Testing the device functionality
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Solution
In-system programming refers to programming the PLD while it is installed in the circuit, allowing for easier updates.
Correct Answer:
A
— Programming the device while it is installed in the circuit
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Q. What does PLD stand for in digital electronics?
A.
Programmable Logic Device
B.
Programmable Logic Design
C.
Programmable Logic Diagram
D.
Programmable Logic Development
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Solution
PLD stands for Programmable Logic Device, which is used to implement combinational and sequential logic circuits.
Correct Answer:
A
— Programmable Logic Device
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Q. What does the term 'programming' refer to in the context of PLDs?
A.
Writing software for the device
B.
Configuring the logic functions of the device
C.
Updating the firmware
D.
Designing the physical layout
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Solution
In PLDs, 'programming' refers to configuring the logic functions of the device to perform specific tasks.
Correct Answer:
B
— Configuring the logic functions of the device
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Q. What does the term 'reconfigurable' mean in the context of PLDs?
A.
The ability to change the physical layout
B.
The ability to change the logic functions after manufacturing
C.
The ability to increase power consumption
D.
The ability to reduce size
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Solution
In the context of PLDs, 'reconfigurable' means the ability to change the logic functions after manufacturing, allowing for flexibility in design.
Correct Answer:
B
— The ability to change the logic functions after manufacturing
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Q. What is a Programmable Logic Device (PLD)?
A.
A device that can be programmed to perform specific logic functions
B.
A fixed-function logic device
C.
A type of microcontroller
D.
A memory storage device
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Solution
A PLD is a device that can be programmed to perform specific logic functions, allowing for custom logic designs.
Correct Answer:
A
— A device that can be programmed to perform specific logic functions
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Q. What is the main difference between CPLD and FPGA?
A.
CPLDs are more complex than FPGAs
B.
FPGAs have more logic resources than CPLDs
C.
CPLDs are used for high-speed applications
D.
FPGAs are less expensive than CPLDs
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Solution
The main difference is that FPGAs typically have more logic resources and are better suited for complex designs compared to CPLDs.
Correct Answer:
B
— FPGAs have more logic resources than CPLDs
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Q. What is the main function of a fuse in a programmable logic device?
A.
To store data
B.
To connect logic gates
C.
To provide power
D.
To reset the device
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Solution
In a programmable logic device, a fuse is used to connect logic gates, allowing the device to be configured for specific logic functions.
Correct Answer:
B
— To connect logic gates
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Q. What is the primary advantage of using a PLD?
A.
Lower cost than fixed-function devices
B.
Higher performance than microcontrollers
C.
Flexibility to change logic functions after manufacturing
D.
Easier to design than ASICs
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Solution
The primary advantage of using a PLD is the flexibility to change logic functions after manufacturing, allowing for rapid prototyping.
Correct Answer:
C
— Flexibility to change logic functions after manufacturing
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Q. What is the primary difference between a CPLD and an FPGA?
A.
CPLDs are more complex than FPGAs
B.
FPGAs have more logic resources than CPLDs
C.
CPLDs are slower than FPGAs
D.
FPGAs are less flexible than CPLDs
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Solution
The primary difference is that FPGAs typically have more logic resources and are better suited for complex designs compared to CPLDs.
Correct Answer:
B
— FPGAs have more logic resources than CPLDs
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Q. What is the primary use of a PLD in digital circuits?
A.
To store data
B.
To perform arithmetic operations
C.
To implement combinational and sequential logic
D.
To generate clock signals
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Solution
The primary use of a PLD in digital circuits is to implement combinational and sequential logic, allowing for custom logic designs.
Correct Answer:
C
— To implement combinational and sequential logic
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Q. What is the purpose of a logic synthesis tool in PLD design?
A.
To convert high-level code into a gate-level representation
B.
To simulate the behavior of the PLD
C.
To program the PLD directly
D.
To test the PLD after programming
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Solution
A logic synthesis tool converts high-level code (like VHDL or Verilog) into a gate-level representation that can be implemented on a PLD.
Correct Answer:
A
— To convert high-level code into a gate-level representation
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Q. What programming language is commonly used to design logic for PLDs?
A.
C
B.
VHDL
C.
Python
D.
Java
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Solution
VHDL (VHSIC Hardware Description Language) is commonly used to design logic for PLDs.
Correct Answer:
B
— VHDL
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Q. What programming language is commonly used to design PLD configurations?
A.
C++
B.
VHDL
C.
Python
D.
Java
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Solution
VHDL (VHSIC Hardware Description Language) is commonly used to design PLD configurations, allowing for hardware description and simulation.
Correct Answer:
B
— VHDL
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Q. Which of the following best describes a GAL?
A.
A type of FPGA
B.
A type of CPLD
C.
A programmable logic device with a fixed architecture
D.
A microcontroller
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Solution
A GAL (Generic Array Logic) is a programmable logic device with a fixed architecture, allowing for specific logic functions to be programmed.
Correct Answer:
C
— A programmable logic device with a fixed architecture
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Q. Which of the following describes a GAL?
A.
Generic Array Logic
B.
General Array Logic
C.
Graphical Array Logic
D.
Global Array Logic
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Solution
GAL stands for Generic Array Logic, which is a type of programmable logic device that allows for the implementation of combinational logic.
Correct Answer:
A
— Generic Array Logic
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Q. Which of the following is a common type of PLD?
A.
FPGA
B.
Microprocessor
C.
ROM
D.
RAM
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Solution
FPGA (Field-Programmable Gate Array) is a common type of PLD that can be configured by the user.
Correct Answer:
A
— FPGA
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Q. Which of the following is a disadvantage of using PLDs?
A.
High flexibility
B.
Higher cost compared to fixed-function devices
C.
Ease of use
D.
Rapid prototyping
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Solution
A disadvantage of using PLDs is that they can be higher in cost compared to fixed-function devices.
Correct Answer:
B
— Higher cost compared to fixed-function devices
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Q. Which of the following is a type of PLD?
A.
FPGA
B.
Microcontroller
C.
ASIC
D.
Transistor
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Solution
FPGA (Field-Programmable Gate Array) is a type of PLD that can be programmed to perform various logic functions.
Correct Answer:
A
— FPGA
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Q. Which of the following is NOT a characteristic of a PLD?
A.
Programmability
B.
High power consumption
C.
Flexibility
D.
Reusability
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Solution
High power consumption is not a characteristic of PLDs; they are designed to be efficient and flexible.
Correct Answer:
B
— High power consumption
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Q. Which of the following is NOT a type of PLD?
A.
CPLD
B.
FPGA
C.
ASIC
D.
GAL
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Solution
ASIC (Application-Specific Integrated Circuit) is not a type of PLD; it is a fixed-function device.
Correct Answer:
C
— ASIC
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Q. Which programming method is commonly used for FPGAs?
A.
VHDL
B.
C++
C.
Python
D.
Java
Show solution
Solution
VHDL (VHSIC Hardware Description Language) is commonly used for programming FPGAs, allowing designers to describe the behavior and structure of electronic systems.
Correct Answer:
A
— VHDL
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