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Microprocessor

Microprocessor
CALL instruction is a ______ instruction.

 3 bytes
 2 bytes
 4 bytes
 1 bytes

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Microprocessor
PSW stands for

 flag byte
 accumulator contents
 none
 accumulator and flag register contents

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Microprocessor
While STC instruction executes,

 only carry and zero flags will be affected.
 all flags will be affected.
 only carry flag will be affected.
 no flags will be affected.

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Microprocessor
Total numbers of output pins in 8085 microprocessor are

 27
 13
 40
 30

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Microprocessor
‘Burst refresh’ in DRAM is also called

None of these
Distributed refresh
Concentrated refresh
Hidden refresh

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Microprocessor
After RESET 8255 will be in

 unchanged condition
 mode 0; all ports are output
 mode 0; all ports are input
 mode 2

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