Page-16
Computer Science
226)What is the length of the temporary register of 8085 microprocessor?
	32 bits		16 bits
	12 bits		8 bits
Answer :
227)What is the length of data buffer register of 8085 microprocessor?
	8 bits		16 bits
	32 bits		12 bits
Answer :
228)How many flags are there in 8085 microprocessor?
	4		5
	6		8
Answer :
229)How many interrupts are there in 8085 microprocessor?
	5		8
	6		10
Answer :
230)What is the memory addressing capability of of 8085 microprocessor?
	16 KB		32 KB
	64 KB		256 KB
Answer :
231)How many I/O ports can be accessed by direct method in 8085 microprocessor
	8		128
	256		64
Answer :
232)How many I/O ports can be accessed by memory mapped method in of 8085 microprocessor?
	8K		32K
	256K		64K
Answer :
233)What is the addressing mode used in instruction MOVE M, C ?
	Direct		Indirect
	Induced		Immediate
Answer :
234)How many and what are the machine cycles needed foe execution of PUSH B?
	2, 1 Fetch and 1 Memory write		3, 1 Fetch and 2 Memory write
	3, 1 Fetch , 1 Memory read and 1 Memory write		3, 1 Fetch and 2 Memory read
Answer :
235)How many and what are the machine cycles needed for execution of MOV D, C?
	1, Fetch		2, 1 Fetch and 1 Memory read
	2, 1 Fetch and 1 Memory write		none of these
Answer :
236)Which of the following register pairs can be directly stored in memory?
	AB		BC
	HL		DE
Answer :
237)What addressing mode is used in the instruction LDA 0345H ?
	Direct		Indirect
	Induced		Immediate
Answer :
238)How many and what are the machine cycles needed for execution of XTHL ?
	1, Fetch		3, 1 Fetch, 1 Memory read and 1 Memory write
	4, 1 Fetch, 2 Memory read and 1 Memory write		5, 1 Fetch, 2 Memory read and 2 Memory write
Answer :
239)What addressing mode is used in the instruction LXI B 0345H?
	Direct		Indirect
	Induced		Immediate.
Answer :
240)How many modes of operation are there in 8255 APPI?
	1		2
	3		4
Answer :

This is page:16