Microprocessor Which of the following instruction will never affect the zero flag? XRA R DCR R ORA R DCX Rp XRA R DCR R ORA R DCX Rp ANSWER DOWNLOAD EXAMIANS APP
Microprocessor The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are all bits set (i.e. FFH) all bits reset (i.e. 00H) same as the content of A7-A0 irrelevant all bits set (i.e. FFH) all bits reset (i.e. 00H) same as the content of A7-A0 irrelevant ANSWER DOWNLOAD EXAMIANS APP
Microprocessor Which one of the following ICs is used to interface keyboard and display? 8259 8253 8251 8279 8259 8253 8251 8279 ANSWER DOWNLOAD EXAMIANS APP
Microprocessor Which one of the following interrupt/interrupts is/are only level triggering? both ‘a’ and ‘b’ RST 5.5 TRAP RST 6.5 both ‘a’ and ‘b’ RST 5.5 TRAP RST 6.5 ANSWER DOWNLOAD EXAMIANS APP
Microprocessor Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value? CLR A ORA A MOV A, 00H SUB A CLR A ORA A MOV A, 00H SUB A ANSWER DOWNLOAD EXAMIANS APP
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