| 1. | 8085 microprocessor has how many pins ? | |
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30
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36
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40
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20
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Report Question| 2. | Which one of the following is not a vectored interrupt ? | |
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TRAP
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INTR
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RST 7.5
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TRAP
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| 3. | HLT opcode means ? | |
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load data to accumulator
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store result in memory
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load accumulator with contents of register
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end of program
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| 4. | A field programmable ROM is called ? | |
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MROM
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PROM
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FROM
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FPROM
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| 5. | The program counter in a 8085 micro-processor is a 16-bit register, because ? | |
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It counts 16-bits at a time
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There are 16 address lines
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It facilitates the user storing 16-bit data temporarily
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It has to fetch two 8-bit data at a time
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| 6. | A microprocessor is ALU ? | |
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and control unit on a single chip
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and memory on a single chip
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register unit and I/O device on a single chip
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register unit and control unit on a single chip
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| 7. | Processor status word of 8085 microprocessor has five flags ? | |
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S, Z, AC, P, CY
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S, OV, AC, P, CY
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S, Z, OV, P, CY
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S, Z, AC, P, OV
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| 8. | The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following ? | |
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Clock cycle
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Memory cycle
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Machine cycle
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Instruction cycle
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| 9. | In an intel 8085A, which is the first machine cycle of an instruction ? | |
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An op-code fetch cycle
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A memory read cycle
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A memory write cycle
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An I/O read cycle
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| 10. | An 8-bit microprocessor signifies that ? | |
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8-bit address bus
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8-bit controller
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8-interrupt lines
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8-bit data bus
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