I/O Mapping (Memory-Mapped I/O, Isolated I/O) MCQs

40 Score: 0 Attempted: 0/40

1. : What is the primary characteristic of Memory-Mapped I/O?
(A) Devices are accessed using the same address space as memory
(B) Devices are accessed through separate I/O instructions
(C) It requires additional hardware for I/O operations
(D) It uses interrupt-driven I/O exclusively

2. : How does Isolated I/O differ from Memory-Mapped I/O?
(A) Isolated I/O uses separate address spaces for I/O devices and memory, while Memory-Mapped I/O uses the same address space
(B) Isolated I/O requires the use of memory-mapped addresses
(C) Isolated I/O is more efficient than Memory-Mapped I/O
(D) Isolated I/O handles I/O operations without requiring I/O instructions

3. : What is a key advantage of using Memory-Mapped I/O?
(A) It simplifies programming by allowing I/O devices to be accessed using standard memory instructions
(B) It increases the number of required I/O instructions
(C) It separates memory access from I/O access
(D) It requires additional hardware support

4. : Which instruction type is used in Isolated I/O to communicate with devices?
(A) Special I/O instructions
(B) Standard memory instructions
(C) Arithmetic instructions
(D) Control instructions

5. : In Memory-Mapped I/O, how are I/O devices treated by the CPU?
(A) As if they are memory locations
(B) As separate entities requiring distinct I/O instructions
(C) Through dedicated I/O ports
(D) Using dedicated interrupts

6. : What is the main disadvantage of Isolated I/O compared to Memory-Mapped I/O?
(A) It requires separate instructions for I/O operations, increasing complexity
(B) It simplifies the addressing of devices
(C) It reduces the number of required instructions
(D) It uses the same address space as memory

7. : Which type of I/O mapping allows the use of standard memory read and write instructions for device access?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

8. : What is one key feature of Isolated I/O?
(A) It uses a different set of instructions for I/O operations compared to memory operations
(B) It allows devices to be accessed through standard memory instructions
(C) It shares the address space with memory
(D) It reduces the complexity of I/O operations

9. : In which I/O mapping method are I/O devices and memory addresses completely separated?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Interrupt-driven I/O

10. : How does Memory-Mapped I/O impact the complexity of device programming?
(A) It reduces complexity by using standard memory access instructions for device communication
(B) It increases complexity by requiring special I/O instructions
(C) It requires more hardware for device communication
(D) It involves frequent interrupts for I/O operations

11. : Which method allows the CPU to use the same address space for both memory and I/O devices?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

12. : What is the main advantage of Isolated I/O?
(A) It allows for more controlled and separate management of I/O and memory operations
(B) It simplifies the use of standard memory instructions
(C) It reduces the number of required I/O instructions
(D) It merges memory and I/O address spaces

13. : In which I/O mapping technique are special I/O instructions used to access I/O devices?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Interrupt-driven I/O

14. : What does Memory-Mapped I/O use for device communication?
(A) The same address space as system memory
(B) A separate set of I/O ports
(C) Special I/O instructions
(D) Dedicated hardware for I/O operations

15. : Which I/O mapping method allows for simpler device programming by using memory access instructions?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

16. : How does Isolated I/O handle the interaction between CPU and I/O devices?
(A) By using distinct I/O instructions and address spaces
(B) By integrating I/O devices within the memory address space
(C) By using standard memory access instructions
(D) By managing all interactions through interrupts

17. : Which I/O mapping technique is typically used when devices are treated like memory locations?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

18. : What is a key benefit of Isolated I/O in terms of system design?
(A) It allows for separate, controlled handling of I/O and memory operations
(B) It simplifies the use of standard memory instructions
(C) It integrates I/O devices directly into memory address space
(D) It reduces the number of I/O instructions required

19. : In which I/O mapping approach are I/O devices accessed through a unified memory address space?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Interrupt-driven I/O

20. : Which method allows for the use of dedicated I/O instructions for device communication?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

21. : What is one disadvantage of using Memory-Mapped I/O?
(A) It can lead to address space conflicts if not managed properly
(B) It requires additional I/O instructions
(C) It increases the number of I/O interrupts
(D) It necessitates separate handling of memory and I/O operations

22. : How does Isolated I/O manage the addresses of I/O devices?
(A) By assigning a separate address space distinct from memory
(B) By integrating I/O devices into the memory address space
(C) By using the same address space as memory
(D) By requiring constant polling of I/O devices

23. : What type of instructions are used for Memory-Mapped I/O operations?
(A) Standard memory access instructions
(B) Special I/O instructions
(C) Arithmetic instructions
(D) Control instructions

24. : Which I/O mapping method requires that memory and I/O operations be handled separately?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Interrupt-driven I/O

25. : What is a primary benefit of using Memory-Mapped I/O in a system?
(A) It allows I/O devices to be accessed as if they were memory locations, simplifying programming
(B) It requires separate handling for I/O operations
(C) It increases the number of I/O instructions required
(D) It mandates the use of special I/O instructions

26. : Which method provides a clear separation between I/O and memory addresses?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

27. : How does Isolated I/O impact programming complexity?
(A) It increases complexity by requiring distinct I/O instructions and address spaces
(B) It reduces complexity by using standard memory instructions
(C) It simplifies the integration of I/O devices within the memory address space
(D) It eliminates the need for I/O instructions

28. : What is the key advantage of using Isolated I/O for device communication?
(A) It provides controlled access by using separate address spaces and instructions for I/O devices
(B) It simplifies the use of memory instructions for device access
(C) It integrates I/O devices into the memory address space
(D) It requires fewer I/O instructions

29. : Which I/O mapping technique allows devices to be accessed using the same instructions as memory operations?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

30. : What is the primary disadvantage of Memory-Mapped I/O?
(A) It can cause address space conflicts if not managed properly
(B) It simplifies programming by using standard memory instructions
(C) It reduces the number of required I/O instructions
(D) It requires additional hardware for implementation

31. : How does Isolated I/O handle I/O operations in comparison to Memory-Mapped I/O?
(A) By using a separate set of instructions and address spaces for I/O operations
(B) By integrating I/O operations within the memory address space
(C) By using the same instructions for both memory and I/O operations
(D) By reducing the number of I/O instructions required

32. : What does Memory-Mapped I/O use to access I/O devices?
(A) The same memory address space used for system memory
(B) A distinct set of I/O instructions and address space
(C) Separate hardware controllers
(D) Special interrupt routines

33. : Which method involves using special instructions to perform I/O operations?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

34. : What is one of the primary uses of Memory-Mapped I/O?
(A) To simplify device access by treating I/O devices as memory locations
(B) To separate memory and I/O operations distinctly
(C) To use dedicated hardware for I/O operations
(D) To require constant polling of I/O devices

35. : In which method are I/O devices and memory operations completely separated?
(A) Isolated I/O
(B) Memory-Mapped I/O
(C) Direct Memory Access (DMA)
(D) Interrupt-driven I/O

36. : How does Memory-Mapped I/O simplify system design?
(A) By using standard memory access instructions for both memory and I/O devices
(B) By requiring separate address spaces and instructions for memory and I/O
(C) By increasing the complexity of I/O management
(D) By requiring more frequent interrupts

37. : What does Isolated I/O provide in terms of address space management?
(A) A dedicated address space for I/O devices separate from memory
(B) Integration of I/O devices into the memory address space
(C) Simplified access using memory instructions
(D) Reduced number of I/O instructions

38. : What is a key characteristic of Memory-Mapped I/O regarding device access?
(A) Devices are accessed using memory addresses rather than special I/O instructions
(B) Devices require special I/O instructions and address spaces
(C) It uses direct memory access for all I/O operations
(D) It simplifies interrupt handling

39. : Which I/O mapping technique simplifies programming by integrating device access with memory operations?
(A) Memory-Mapped I/O
(B) Isolated I/O
(C) Direct Memory Access (DMA)
(D) Programmed I/O

40. : What is the primary function of Isolated I/O in an I/O system?
(A) To provide separate instructions and address spaces for I/O operations
(B) To use the same address space for memory and I/O operations
(C) To handle device communication using memory instructions
(D) To reduce the complexity of I/O operations

I/O Mapping (Memory-Mapped I/O, Isolated I/O) MCQs
By: Prof. Dr. Fazal Rehman | Last updated: June 23, 2025

Read More Computer Architecture MCQs

Related Posts: