Question:
When the following is used, the CPU is bypassed for certain data transfers?
When the following is used, the CPU is bypassed for certain data transfers?
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DMA improves data transfer speed by allowing direct memory-peripheral communication.
Updated On: Jun 25, 2026
- Polled I/O
- DMA
- TRAP
- Software Interrupts
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The Correct Option is B
Solution and Explanation
Concept:
DMA stands for Direct Memory Access.
It allows peripheral devices to communicate directly with memory without continuous CPU intervention.
Step 1: Understand DMA operation.
In DMA transfer, \[ \text{Peripheral} \longleftrightarrow \text{Memory} \] communication occurs directly.
Step 2: Role of CPU.
The CPU initializes the transfer and then temporarily relinquishes control of the bus. Thus the CPU is bypassed during actual data transfer.
Step 3: Select the correct option.
\[ \boxed{\text{DMA}} \]
Step 1: Understand DMA operation.
In DMA transfer, \[ \text{Peripheral} \longleftrightarrow \text{Memory} \] communication occurs directly.
Step 2: Role of CPU.
The CPU initializes the transfer and then temporarily relinquishes control of the bus. Thus the CPU is bypassed during actual data transfer.
Step 3: Select the correct option.
\[ \boxed{\text{DMA}} \]
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