DIRECT MEMORY ACCESS MCQs – CHAPTER 5 DAE 10 min Score: 0 Attempted: 0/10 Subscribe 1. Following two signals are used in DMA operation. (A) HOLD & HLDA (B) INTR & INTA (C) WAIT & READY (D) HOLD & INTAShow All Answers 2. Following is a DMA controller IC (A) 8086 (B) 8051 (C) 8237 (D) 8255Show All Answers 3. In a DMA read operation the data is transferred (A) from I/O to memory (B) from memory to memory (C) from memory to I/O (D) from I/O to I/OShow All Answers 4. In a DMA write operation the data is transferred (A) from I/O to memory (B) from memory to I/O (C) from memory to memory (D) from I/O to I/OShow All Answers 5. Which method bypasses the microprocessor for data transfer? (A) Handshaking (B) Interrupt (C) DMA (D) PollingShow All Answers 6. DMA stands for (A) Direct Memory Access (B) Data Memory Allocation (C) Direct Memory Allocation (D) Data Memory AccessShow All Answers 7. Which microprocessor pin is used to acknowledge a DMA operation? (A) READY (B) HOLD (C) HLDA (D) WAITShow All Answers 8. Number of channels available in 8237 DMA controller (A) 2 (B) 3 (C) 4 (D) 5Show All Answers 9. The pin of microprocessor is used to request DMA process. (A) HOLD (B) RD (C) ALE (D) WRShow All Answers 10. The bus that is immediately available to the microprocessor is called (A) Local bus (B) Remote bus (C) Shared bus (D) All of theseShow All Answers
