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Direct Memory Access (DMA) in Computer Systems

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Direct Memory Access (DMA) in Computer Systems

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Questions and Answers

What is the primary function of Direct Memory Access (DMA) in computer systems?

Improve the speed of the central processing unit (CPU)

Increase the involvement of the CPU in data transfers

Reduce the workload on the CPU during data transfer operations (correct)

Eliminate the need for peripherals in data transfers

How does DMA differ from traditional I/O operations involving the CPU?

Traditional I/O involves more memory allocation

DMA limits the types of peripherals that can be used

Traditional I/O requires constant CPU supervision

DMA uses a separate controller for data transfers (correct)

In a Multiprocessor system, what advantage does having multiple processors offer?

Decreases the overall system performance

Limits the number of tasks that can be executed simultaneously

Reduces the need for DMA controllers

Allows for parallel processing and faster task execution (correct)

What distinguishes Clustered Systems from Multiprocessor Systems?

Clustered systems appear as a single system despite being independent computers (A) Signup and view all the answers

How does a single-processor system handle process execution in comparison to a multiprocessor system?

Executes one process at a time and selects from a ready queue (C) Signup and view all the answers

What is the primary benefit of clusters designed for high availability?

Continuous operation in case of node failures (B) Signup and view all the answers

In a clustered system, how does scalability contribute to its efficiency?

By providing additional processing power and capacity (B) Signup and view all the answers

What is the key difference between multiprogramming and multitasking?

Multiprogramming involves running programs sequentially, while multitasking runs them simultaneously (A) Signup and view all the answers

What happens when the mode bit is set to 1 in a system?

The system is executing user applications (B) Signup and view all the answers

How does context switching in process management contribute to efficient resource utilization?

By enabling each process to take turns using the CPU (B) Signup and view all the answers