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Computer Organization Instruction Sets

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Questions and Answers

What is a limitation of zero-address instructions?

They are limited in their functionality (correct)
They allow for much flexibility in addressing modes
They require more memory space
They are faster to execute

What is a disadvantage of one-address instructions?

They are faster to execute
They are slower to execute (correct)
They allow for much flexibility in addressing modes
They require less memory space

What is a disadvantage of two-address instructions?

They require more memory space and can be slower to execute (correct)
They are faster to execute
They allow for much flexibility in addressing modes
They require less memory space

What is a disadvantage of three-address instructions?

They require even more memory space and can be slower to execute (D) Signup and view all the answers

What does the SUB instruction do in the 8085 microprocessor?

Subtracts the content of the accumulator from itself (A) Signup and view all the answers

What is the purpose of the HLT instruction?

To halt the execution of the program (D) Signup and view all the answers

What is the assumption made about each instruction in the given set?

Each instruction will use the result of the previous instruction (B) Signup and view all the answers

What is the effect of the SUB instruction on the accumulator?

It clears the content of the accumulator (A) Signup and view all the answers

What is the relationship between the instructions in the given set?

Each instruction uses the result of the previous instruction (B) Signup and view all the answers

What is the purpose of the DCR instruction?

To decrement the content of a register (A) Signup and view all the answers