Electronic Quiz 5 (8051 Microcontroller)
1. Out of these Micro Controllers are usually used for?| A. | Computer | B. | Mobile Phone |
| C. | Embedded systems | D. | None of these |
2. How many External Hardware Interrupt are there in 8051?
| A. | 5 | B. | 3 |
| C. | 2 | D. | 4 |
3. What is the size of internal RAM memory which is BIT addressable?
| A. | 64 bit | B. | 128 bit |
| C. | 128 byte | D. | 256 byte |
4. Are PSW (Program Status Word) and Flag Register are similar in function?
| A. | Yes | B. | No |
| C. | Depends on application | D. | Depends on the program |
5. Register Bank selection is done by which register?
| A. | Accumulator | B. | PSW |
| C. | Sp | D. | None of these |
6. For which Port of 8051 we need external Pull up resistors?
| A. | Port 3 | B. | Port 1 |
| C. | Port 0 | D. | Port 2 |
7. What is the size of internal RAM memory of 8051?
| A. | 64 bytes | B. | 128 bytes |
| C. | 256 bytes | D. | 512 bytes |
8. What is the maximum size of ROM memory can be accessed by 8051 including Internal ROM?
| A. | 60kB | B. | 62kB |
| C. | 64kB | D. | 68kB |
9. Which register is used in serial data transfer?
| A. | PSW | B. | SBUF |
| C. | SCON | D. | SBUF and SCON |
10. The instruction RET is used for?
| A. | Return from Subroutine | B. | Return from Interrupt |
| C. | Return to top of program | D. | Return to stack memory |
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