Microprocessors - ECE Questions and Answers

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If CS = A₁₅ A₁₄ A₁₃ is used as chip select logic of a 4 K RAM in 8085 system, its memory range is

3000 H - 3 FFF H

7000 H - 7 FFFH

5000 H - 5 FFF H and 6000 H - 6 FFF H

6000 H - 6 FFF H and 7000 H - 7 FFF H

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Consider the following part of a C program float a, b
b = (a > 4 ? 2 : 9);

Assuming that a has values of 3 and 6, the values stored respectively will be

2 and 9

2.0 and 9.0

2.0 and 2.0

9.0 and 2.0

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Consider the following operation in a computer

Multiplication of scalar
Iversion of matrix
Printing a line of 120 characters on a printer

Which of the above is a subroutine?

1 and 2 only

1 and 3 only

1, 2 and 3

2 only

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The addressing mode depicted in the given figure is

direct

implicit

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IC 7485 cannot be cascaded.

True

False

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An I/O processor controls the flow of information between

cache memory and I/O devices

main memory and I/O devices

two I/O devices

cache and main memory

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MS Access is a DBMS software.

True

False

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When .9432 E - 4 is subtracted from .5452 E - 3 in normalized floating point mode

none of the numbers is changed

.9432 E - 4 is changed to .09432 E - 3 and .5452 E - 3 is not changed

.5452 E - 3 is changed to 5.452 E - 4 but .9432 E - 4 is not changed

both Ihe numbers are changed and their exponents are, made equal to -5

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DS directive in 8085

forces the assembler to reserve one byte of memory

forces the assembler to reserve a specified number of bytes in the memory

forces the assembler to reserve a specified number of consecutive bytes in the memory

none of the above