Rajasthan Technical Education Second Year Paper 2016 – Microprocessor

Rajasthan Technical Education Second Year Paper 2016 – Microprocessor

A floating point number is said to be normalized if
(a) the most significant digit of the mantissa is zero
(b) the most significant digit of the exponent is zero
(c) the most significant digit of the mantissa is non-zero
(d) the most significant digit of the exponent is non-zero

Ready pin of a microprocessor is used
(a) to indicate that the micro-processor is ready to receive inputs
(b) to indicate that the micro-processor is ready to give outputs
(c) to introduce wait states
(d) to provide direct memory access

Shadow address will exist in
(a) absolute decoding
(b) linear decoding
(c) partial decoding
(d) None of the above

What is the addressing mode used in instruction MOVC, M ?
(a) Direct
(b) Indirect
(c) Indexed
(d) Immediate

The contents of accumulator before CMA instruction is ASH. Its contents after instruction is executed is
(a) A5 H
(b) 5A H
(c) AA H
(d) 55 H

The flag status that can be set by direct instruction is
(a) CY
(b) Z
(c) P
(d) AC

Microprocessor speed depends on mainly
(a) Clock
(b) Data bus width
(c) Address bus width
(d) Size of register

For the 8085 assembly language program given above, the content of the accumulator after the execution of the program is
3000 MVI A, 45 H
3002 MOV B, A
3003 STC
3004 CMC
3005 RAR
3006 XRA B
(a) OOH
(b) 46 H
(c) 67 H
(d) E7H

Which one of the following statement is true for TRAP ?
(a) It is level triggered
(b) It is negative edge triggered
(c) It is positive edge triggered
(d) It is both positive edge triggered and level triggered

Status of S0 and S1 pins for memory write is
(a) 00
(b) 01
(c) 10
(d) 11

How many of memory cycles are required to execute the following 8085 instructions ?
(i) LDA 3000 H
(ii) LXID, FOFIH would be
(a) 2 for (i) and 2 for (ii)
(b) 4 for (i) and 3 for (ii)
(c) 3 for (i) and 3 for (ii)
(d) 3 for (i) and 4 for (ii)

The microprocessor 8085 has ________basic instructions and ________opcodes.
(a) 80, 246
(b) 70, 346
(c) 80, 346
(d) 70, 246

In a 8085 microprocessor, the instruction CMP B has been executed while the contents of accumulator is less than that of register B. As a result carry flag and zero flag will be respectively
(a) set, reset
(b) reset, set
(c) reset, reset
(d) set, set

Consider the following set of 8085 instructions
MVIA, 82 H
ORA A
JP DSPLY
XRA A
DSPLY:OUT PORT 1
HLT
The output at PORT 1 is
(a) OOH
(b) FFH
(c) 92 H
(d) 11 H

Which causes the microprocessor to immediately terminate its present acitivity ?
(a) RESET signal
(b) Interrupt signal
(c) Both (a) & (b)
(d) None of these