Que: 1. Which of the following is an 8-bit register?
|
| a. PSW(Program Status Word) |
| b. TCON(Timer Control Register) |
| c. Accumulator |
| d. all of the mentioned |
(d). all of the mentioned
Que: 2. Which of the following is not an instruction of 8051?
|
| a. arithmetic instructions |
| b. boolean instructions |
| c. logical instructions |
| d. none of the above |
Que: 3. The operations performed by data transfer instructions are on
|
| a. bit data |
| b. byte data |
| c. 16-bit data |
| d. all of the mentioned |
(d). all of the mentioned
Que: 4. Which of the following is true while executing data transfer instructions?
|
| a. program counter is not accessible |
| b. restricted bit-transfer operations are allowed |
| c. both operands can be direct/indirect register operands |
| d. all of the mentioned |
(c). both operands can be direct/indirect register operands
Que: 5. The logical instruction that affect the carry flag during its execution is
|
| a. XRL A; |
| b. ANL A; |
| c. ORL A; |
| d. RLC A; |
Que: 6. The instruction that is used to complement or invert the bit of a bit addressable SFR is
|
| a. CLR C |
| b. CPL C |
| c. CPL Bit |
| d. ANL Bit |
Que: 7. The instructions that change the sequence of execution are
|
| a. conditional instructions |
| b. logical instructions |
| c. control transfer instructions |
| d. data transfer instructions |
(c). control transfer instructions
Que: 8. The control transfer instructions are divided into
|
| a. explicit and implicit control transfer instructions |
| b. conditional and unconditional control transfer instructions |
| c. auto control and self control transfer instructions |
| d. all of the mentioned |
(b). conditional and unconditional control transfer instructions
Que: 9. The conditional control transfer instructions check a bit condition which includes any bit of
|
| a. bit addressable RAM |
| b. bit addressable SFRs |
| c. content of accumulator |
| d. all of the mentioned |
(d). all of the mentioned
Que: 10. All conditional jumps are
|
| a. absolute jumps |
| b. long jumps |
| c. short jumps |
| d. none of the above |