Electronics and Communication Engineering - Digital Electronics
Exercise :: Digital Electronics - Section 20
| 1. |
If we need a low noise device, we should use |
Answer: Option B
Explanation:
|
| 2. |
The principal of locality of reference justifies the use of |
| A. |
interrupts | | B. |
DMA | | C. |
virtual memory | | D. |
cache memory |
Answer: Option D
Explanation:
|
| 3. |
The contents of the commands register are 23 H. Then port C |
| A. |
is an input port | | B. |
is an output port | | C. |
is both input as well as output port | | D. |
none of the above |
Answer: Option A
Explanation:
|
| 4. |
Consider the following digital circuits:
 - Multipliers
- Read only memories
- D-latch
- Circuits as shown
Which of these come under the class of combinational circuit? |
| A. |
1 and 2 | | B. |
3 and 4 | | C. |
1, 2 and 3 | | D. |
1, 2, 3 and 4 |
Answer: Option A
Explanation:
|
| 5. |
Which of the following bus is used to transfer data from main memory to peripheral device? |
| A. |
DMA bus | | B. |
Output bus | | C. |
Input bus | | D. |
Data bus |
Answer: Option A
Explanation:
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