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Questions and Answers
What is the main purpose of the ALU in a processor?
What is the main purpose of the ALU in a processor?
- To decode instructions
- To store data
- To perform arithmetic calculations and logical operations (correct)
- To organise the sequence of program instructions
What is the role of the control unit in a processor?
What is the role of the control unit in a processor?
- To decode instructions
- To store data
- To perform arithmetic calculations and logical operations
- To organise the sequence of program instructions (correct)
Which of the following is NOT part of the processor's job?
Which of the following is NOT part of the processor's job?
- Executing instructions
- Decoding instructions
- Storing data (correct)
- Performing calculations
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Study Notes
- The processor or Central Processing Unit (CPU) is the internal hardware component of the computer that is responsible for executing the instructions of programs.
- The processor is made up of several important components, each of which has a specific role.
- The ALU is responsible for performing arithmetic calculations and logical operations, such as addition, subtraction, multiplication, division, and bitwise operations.
- The control unit (or program control unit) is in charge of organising the sequence in which program instructions are executed, followed by decoding the instructions.
- Decoding an instruction means that the opcode and operand of an instruction are analysed to determine what needs to be done to execute the instruction, i.e. specify the type of instruction and the address mode used, fetch any required data, and co-ordinate the sequence of micro-operations.
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