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Microprocessor

Microprocessor
The five flags in 8085 are designated as

Z, C, S, P, AC
Z, CY, S, D, AC
Z, CY, S, P and AC
D, Z, S, P, AC

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 1, 3, 2 and 4
 2, 4, 1 and 3
 2, 1, 4 and 3
 1, 2, 3 and 4

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Microprocessor
Identify the communication interfacing device from the following

 8155
 8251
 8257
 8255

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Microprocessor
Consider the following registers: 1. Accumulator and flag register 2. B and C register 3. D and E register 4. H and L register Which of these 8-bit registers of 8085 microprocessor can be paired together to make a 16-bit register?

 1, 3 and 4
 1, 2 and 3
 2, 3 and 4
 1, 2 and 4

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Microprocessor
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

Arithmetic, assignment, relational
Relational, assignment, arithmetic
Assignment, relational, arithmetic
Arithmetic, relational, assignment

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Microprocessor
In order to complement the lower nibble of accumulator one can use

 XRI 0FH
 CMA
 ORI 0FH
 ANI 0FH

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