Computer Fundamentals - Section 2 | Multiple Questions and Answers

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Computer Fundamentals - Section 2 Multiple Questions and Answers.

16.	The port that is used for the generation of handshake lines in mode 1 or mode 2 is

	A.	port A
	B.	port B
	C.	port C Lower
	D.	port C Upper

17.	If A1=0, A0=1 then the input read cycle is performed from

	A.	port A to data bus
	B.	port B to data bus
	C.	port C to data bus
	D.	CWR to data bus

18.	The function, „data bus tristated‟ is performed when

	A.	CS(active low) =1
	B.	CS(active low) =0
	C.	CS(active low) =0, RD(active low) =1, WR(active low) =1CS(active low) =1 OR CS(active low) =0, RD(active low) =1, WR(active low) =1
	D.	CS(active low) =1 OR CS(active low) =0, RD(active low) =1, WR(active low) =1

19.	The pin that clears the control word register of 8255 when enabled is

	A.	CLEAR
	B.	SET
	C.	RESET
	D.	CLK

20.	The device that enables the microprocessor to read data from the external devices is

	A.	printer
	B.	joystick
	C.	display
	D.	reader

Read More :

» Computer Fundamentals - Section 1

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» Computer Fundamentals - Section 3

» Computer Fundamentals - Section 4

» Computer Fundamentals - Section 5

» Computer Fundamentals - Section 6

» Computer Fundamentals - Section 7

» Computer Fundamentals - Section 8

» Computer Fundamentals - Section 9

» Computer Fundamentals - Section 10

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