Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

CLR A

ORA A

MOV A, 00H

SUB A

CLR A

ORA A

MOV A, 00H

SUB A

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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 4

2, 3 and 4

1, 2 and 3

1, 3 and 4

1, 2 and 4

2, 3 and 4

1, 2 and 3

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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

Assignment, relational, arithmetic

Relational, assignment, arithmetic

Arithmetic, assignment, relational

Arithmetic, relational, assignment

Assignment, relational, arithmetic

Relational, assignment, arithmetic

Arithmetic, assignment, relational

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Microprocessor
Cycle stealing mode of DMA operation involves

While the microprocessor is executing a program an interface circuit takes over control of address, data, control buses when not in use by microprocessor

The DMA control waiting for the microprocessor to finish execution of the program and then takes over the buses

Data transfer takes place between the I/O device and memory during every alternate clock cycle

DMA controller taking over the address, data and control buses while a block of data is transferred between memory and I/O device

While the microprocessor is executing a program an interface circuit takes over control of address, data, control buses when not in use by microprocessor

The DMA control waiting for the microprocessor to finish execution of the program and then takes over the buses

Data transfer takes place between the I/O device and memory during every alternate clock cycle

DMA controller taking over the address, data and control buses while a block of data is transferred between memory and I/O device

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Microprocessor
In one’s complement 8 bit representation 11111111 represents

+0

-0

1

-1

+0

-0

1

-1

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Microprocessor
A mask programmed ROM is

programmed at the time of fabrication

erasable and programmable

programmed by the user

erasable electrically

programmed at the time of fabrication

erasable and programmable

programmed by the user

erasable electrically

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Microprocessor

Microprocessor Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

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?

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

Microprocessor Cycle stealing mode of DMA operation involves

Microprocessor In one’s complement 8 bit representation 11111111 represents

Microprocessor A mask programmed ROM is

Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

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?

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

Microprocessor
Cycle stealing mode of DMA operation involves

Microprocessor
In one’s complement 8 bit representation 11111111 represents

Microprocessor
A mask programmed ROM is