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Computer Science |
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| 211)What do the content of the program counter specify? | |||
| The address of the instruction being executing | The count of the number of instructions executed so far | ||
| The address of the instruction to be executed next | The address of the instruction executed las | ||
| Answer : | |||
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| 212)Which of the following interrupts has lowest Priority? | |||
| TRAP | RST 6.5 | ||
| RST 7.5 | INTR | ||
| Answer : | |||
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| 213)The interrupt service routine is serviced | |||
| immediately on receopt of request | after the executing the current instruction | ||
| at the end of current machine cycle | none of these | ||
| Answer : | |||
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| 214)What do the content of the stack pointer specify? | |||
| Address of the top of stack | Address of bottom of stack | ||
| Content of the top of stack | content of the bottom of stack | ||
| Answer : | |||
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| 215)Even after a Reset operation which of the following interrupts remain enable? | |||
| RST 7.5 | RST 6.5 | ||
| TRAP | RST 5.5 | ||
| Answer : | |||
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| 216)In order to enable INTR interrupt, which of the following instructions is/are needed? | |||
| EI only | SIM only | ||
| both EI and SIM | none | ||
| Answer : | |||
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| 217)What do the content of Instruction register specify? | |||
| Operand of the instruction being executed | Op-code of the instruction being executed | ||
| Op-code of the instruction to be executed next | Operand of the instruction to be executed next | ||
| Answer : | |||
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| 218)How many lines are there in address bus and data bus of 8085 microprocessor respectively? | |||
| 12, 8 | 8, 8 | ||
| 16, 8 | 8, 16 | ||
| Answer : | |||
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| 219)How many interrupt control lines are there in 8085 microprocessor | |||
| 6 | 8 | ||
| 10 | 16 | ||
| Answer : | |||
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| 220)What is the memory word size of 8085 microprocessor | |||
| 8 bits | 12 bits | ||
| 16 bits | 20 bits | ||
| Answer : | |||
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| 221)What is the size of the accumulator (register A) 8085 microprocessor? | |||
| 6 bits | 8 bits | ||
| 12 bits | 16 bits | ||
| Answer : | |||
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| 222)What is the length of instruction register 8085 microprocessor? | |||
| 8 bits | 16 bits | ||
| 32 bits | 64 bits | ||
| Answer : | |||
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| 223)Waht is the length of program counter (PC) 8085 microprocessor? | |||
| 8 bits | 12 bits | ||
| 16 bits | 32 bits | ||
| Answer : | |||
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| 224)What is the length of SP (satck pointer) of 8085 microprocessor? | |||
| 8 bits | 16 bits | ||
| 12 bits | 32 bits | ||
| Answer : | |||
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| 225)What is the length of status register of 8085 microprocessor? | |||
| 8 bits | 16 bits | ||
| 12 bits | 32 bits | ||
| Answer : | |||
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