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Microprocessor

Microprocessor
CALL instruction is a ______ instruction.

 2 bytes
 1 bytes
 4 bytes
 3 bytes

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Microprocessor
Which of the following instruction will never affect the zero flag?

 DCR R
 DCX Rp
 ORA R
 XRA R

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Microprocessor
The control flags in 8086 are:

All of these
 the interrupt flag(IF).
 the direction flag(DF).
 the Trap flag(TF).

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Microprocessor
Pick up the programmable interrupt controller from the following

 8279
 8259
 8257
 8275

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Microprocessor
Temporary registers in 8085 are

 H and L.
 B and C.
 W and Z.
 D and E.

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

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