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Microprocessor Questions Set 14:

Quiz Mode

How many devices can be connected simultaneously to the microprocessor via the 8257 DMA controller?

Solution:

What does the NOP (No Operation) instruction introduce?

None of the above

An address

A delay

A memory location

Solution:

Which branching instruction opcode leads to the following condition: "There is a Jump on Carry"?

JNC

Solution:

Which of the following flags does not belong to the 8085 microprocessor?

Carry flag

Sign flag

Zero flag

One flag

Solution:

Which component of a CPU tells the computer what steps to perform for each instruction?

Instruction decoder

Program counter

Registers

ALU

Solution:

Which of the following Segment Registers of a BIU (Bus Interface Unit) is used to hold the extra destination data for string operations?

Solution:

In an 8085 microprocessor, the shift registers which store the result of an addition and the
overflow bit are, respectively

B and F

A and F

H and F

A and C

Solution:

What is the purpose of the following code block?

`MOV AH,01H`

`INT 21H`

`MOV INPUT,AL`

Character input with echo

Character input without echo

To read a string

To display a single character

Solution:

After the execution of the following assembly code, what is the value stored in the register A?

     `MOV A,#00H`

     `MOV B,#05H`

`L1: INC A`

     `DEC B`

     `CJNE B,#04H, L1`

     `END`

Solution:

Which of the following options represents the default interrupt priority sequence in 8051?

INT0 < INT1 < Timer 0 < Timer 1 < Serial

Timer 0 < Timer 1 < Serial < INT0 < INT1

Serial < Timer 1 < INT1 < Timer 0 < INT0

Timer 1 < Serial < Timer 0 < INT1 < INT 0

Microprocessor Questions Set 14:

How many devices can be connected simultaneously to the microprocessor via the 8257 DMA controller?

Solution:

What does the NOP (No Operation) instruction introduce?

Solution:

Which branching instruction opcode leads to the following condition: "There is a Jump on Carry"?

Solution:

Which of the following flags does not belong to the 8085 microprocessor?

Solution:

Which component of a CPU tells the computer what steps to perform for each instruction?

Solution:

Which of the following Segment Registers of a BIU (Bus Interface Unit) is used to hold the extra destination data for string operations?

Solution:

In an 8085 microprocessor, the shift registers which store the result of an addition and the
overflow bit are, respectively

Solution:

What is the purpose of the following code block?

`MOV AH,01H`

`INT 21H`

`MOV INPUT,AL`

Solution:

After the execution of the following assembly code, what is the value stored in the register A?

     `MOV A,#00H`

     `MOV B,#05H`

`L1: INC A`

     `DEC B`

     `CJNE B,#04H, L1`

     `END`

Solution:

Which of the following options represents the default interrupt priority sequence in 8051?

Solution:

Related Question Sets:

Related Topics:

Microprocessor Questions Set 14:

How many devices can be connected simultaneously to the microprocessor via the 8257 DMA controller?

Solution:

What does the NOP (No Operation) instruction introduce?

Solution:

Which branching instruction opcode leads to the following condition: "There is a Jump on Carry"?

Solution:

Which of the following flags does not belong to the 8085 microprocessor?

Solution:

Which component of a CPU tells the computer what steps to perform for each instruction?

Solution:

Which of the following Segment Registers of a BIU (Bus Interface Unit) is used to hold the extra destination data for string operations?

Solution:

In an 8085 microprocessor, the shift registers which store the result of an addition and theoverflow bit are, respectively

Solution:

What is the purpose of the following code block? MOV AH,01H INT 21H MOV INPUT,AL

Solution:

After the execution of the following assembly code, what is the value stored in the register A? MOV A,#00H MOV B,#05H L1: INC A DEC B CJNE B,#04H, L1 END

Solution:

Which of the following options represents the default interrupt priority sequence in 8051?

Solution:

Related Question Sets:

Related Topics:

In an 8085 microprocessor, the shift registers which store the result of an addition and the
overflow bit are, respectively

What is the purpose of the following code block?

`MOV AH,01H`

`INT 21H`

`MOV INPUT,AL`

After the execution of the following assembly code, what is the value stored in the register A?

`MOV A,#00H`

`MOV B,#05H`

`L1: INC A`

`DEC B`

`CJNE B,#04H, L1`

`END`