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Computer Science |
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| 196)What is the number of non-zero states for a 16 bit binary D/A convertor? | |||
| 65536 | 10000 | ||
| 9999 | 36535 | ||
| Answer : | |||
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| 197)Which byte of an instruction is loaded into IR register ? | |||
| First | Last | ||
| Both | None | ||
| Answer : | |||
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| 198)Which of the following is/are vectored interrupt(s)? | |||
| RST 5.5 | RST 6.5 | ||
| RST 7.5 | All of these | ||
| Answer : | |||
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| 199)In order to eneble TRAP interrupt which of the following instructions are needed? | |||
| EI only | SIM only | ||
| EI and SIM both | None | ||
| Answer : | |||
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| 200)What is the number of non-zero state for a 16 bit BCD D/A converter? | |||
| 65536 | 9999 | ||
| 10000 | 65535 | ||
| Answer : | |||
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| 201)What is the direction of data bus? | |||
| Unidirectional into the microprocessor | Unidirectional out of microprocessor | ||
| Bidirectional | Mixed directional i.e sometimes into the microprocessor, sometimes out of the microprocessor | ||
| Answer : | |||
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| 202)Which of the following is unmaskable interrupt? | |||
| RST 5.5 | RST 6.5 | ||
| RST 7.5 | TRAP | ||
| Answer : | |||
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| 203)A RIM instruction is used to | |||
| Disable the interrupt 7.5, 6.5, 5.5 | Read in the serial input data | ||
| Read in status of pending interrupts, if any | both (b) and (c) | ||
| Answer : | |||
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| 204)What is the direction of address bus? | |||
| Unidirectional into the microprocessor | Unidirectional out of the microprocessor | ||
| Bidirectional | Mixed directional i.e sometimes into the microprocessor, sometimes out of the microprocessor | ||
| Answer : | |||
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| 205)What is the direction of control bus? | |||
| Unidirectional into the microprocessor | Unidirectional out of the microprocessor | ||
| Bidirectional | Mixed directional i.e some lines are into the microprocessor and some lines are out of microprocessor | ||
| Answer : | |||
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| 206)If instruction RST 5.5 is written in a program the program will jump to location | |||
| 0020 H | 0024 H | ||
| 0028 H | 002C H | ||
| Answer : | |||
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| 207)When TRAP interrupt is triggered program controll is transferred to location | |||
| 0020 H | 0024 H | ||
| 0028 H | 002C H | ||
| Answer : | |||
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| 208)Which of the followings has the highest priority? | |||
| RST 5.5 | RST 6.5 | ||
| RST 7.5 | TRAP | ||
| Answer : | |||
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| 209)The RST 5.5 service routine starts from location | |||
| 0010 H | 0024 H | ||
| 0028 H | 002C H | ||
| Answer : | |||
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| 210)Which of the following interrupts does not required an active low signal INTA ? | |||
| TRAP | INTR | ||
| RST 7.5 | RST 6.5 | ||
| Answer : | |||
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