Microprocessors - ECE Questions and Answers

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8255 A has three 8 bit ports A, B, C for peripheral data transfer. For programming 8255 A, these ports are grouped as

Port A with Port B

Port A with 4 most significant ports of C, port B with 4 least significant ports of C

Port A with Port C

none of the above

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'WRITE' is a

Word processor

Line editor

Text editor

Column editor

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The number of key words in C is

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In which of the following 8085 instructions no condition flags are affected?

INX rp

INR r

SBI data

INR M

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Assertion (A): In register indirect addressing mode of 8085, the address of operand is in the specified register.

Reason (R): An example of register indirect addressing mode is MOV, A, M..

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

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A high level language is less efficient than machine language.

True

False

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In the dimension statement DIMENSION A (50, 50), K (100, 100) the total number of locations reserved will be

2500

100000

125000

250000

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If I = J = K = 13, then in Fortran 1 = 10 - (1 / 10) * 10 + (J / 5) * 4 + K ** (- 2) is equal to

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The first row of the window is called ' Title bar '.

True

False