1.1.1b - The Fetch-Decode-Execute Cycle

What are the three main functions of a computer?

• Print, scan, copy

• Connect, disconnect, update

• Display, store, delete

• Input, process, output

What is the function of the memory in a computer?

• Stores the program

• Processes the data

• Delivers the output

• Receives the input

What is the role of the central processing unit (CPU) in a computer?

• Processes the data

• Stores the program

• Receives the input

• Delivers the output

What are the three stages of the fetch to code execute cycle?

• Fetch, decode, execute

• Input, process, output

• Read, write, delete

• Connect, disconnect, update

What is the function of the program counter in the fetch stage?

• Increments the program counter

• Sends the address to main memory

• Copies the address to the memory address register

• Checks the address of the next instruction

What is the purpose of the control unit in the fetch stage?

• Increments the program counter

• Sends a read signal to main memory

• Sends the address to main memory

• Copies the address to the memory address register

What does the op code represent in an instruction?

• The actual data

• The address of the next instruction

• What it is that needs to be done

• Where the data is to be found

What does the operand contain in an instruction?

• Where the data is to be found

• The address of the next instruction

• The actual data

• What it is we need to do

What does the branch always code do in the program?

• Copies the address to the memory address register

• Replaces the value held in the program counter

• Increments the program counter

• Sends a read signal to main memory

What is the function of the accumulator in the CPU?

• Delivers the output

• Stores the program

• Processes the data

• Stores the intermediate results from the ALU