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Computer Science

196)What is the number of non-zero states for a 16 bit binary D/A convertor?
65536 10000
9999 36535
Answer :

197)Which byte of an instruction is loaded into IR register ?
First Last
Both None
Answer :

198)Which of the following is/are vectored interrupt(s)?
RST 5.5 RST 6.5
RST 7.5 All of these
Answer :

199)In order to eneble TRAP interrupt which of the following instructions are needed?
EI only SIM only
EI and SIM both None
Answer :

200)What is the number of non-zero state for a 16 bit BCD D/A converter?
65536 9999
10000 65535
Answer :

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 :

202)Which of the following is unmaskable interrupt?
RST 5.5 RST 6.5
RST 7.5 TRAP
Answer :


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 :

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 :

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 :

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 :

207)When TRAP interrupt is triggered program controll is transferred to location
0020 H 0024 H
0028 H 002C H
Answer :

208)Which of the followings has the highest priority?
RST 5.5 RST 6.5
RST 7.5 TRAP
Answer :

209)The RST 5.5 service routine starts from location
0010 H 0024 H
0028 H 002C H
Answer :

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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