Inside CPU, FDE Cycle and Buses Computer Science Grade 10

A central processing unit (CPU) performs the Fetch-Decode-Execute (FDE) cycle to process instructions.

Which two registers are used in the fetch stage of the cycle?

• A) Memory Address Register (MAR) and Memory Data Register (MDR)

• 
  B) Current Instruction Register (CIR) and Accumulator (ACC)

• 
  C) Program Counter (PC) and Memory Address Register (MAR)

• 
  D) Accumulator (ACC) and Memory Data Register (MDR)

When playing Roblox, every action (jumping, moving, interacting) goes through the Fetch-Decode-Execute (FDE) Cycle.

What happens at the decode stage of the cycle in Roblox?

• A) The CPU fetches the instruction from memory, retrieving the action the player wants to perform.

• B) The CPU interprets the instruction, deciding what needs to be done, such as checking if a jump is valid based on game physics.

• C) The CPU executes the instruction, making the Roblox character actually jump on the screen.

• D) The CPU stores the instruction permanently so the action can be replayed later.

Multiple-Choice Question (MCQ) - Execute Stage in Roblox 🎮

When playing Roblox, every action (jumping, moving, interacting) goes through the Fetch-Decode-Execute (FDE) Cycle.

What happens at the execute stage of the cycle in Roblox?

• A) The CPU fetches the instruction from memory, retrieving the action the player wants to perform.

• B) The CPU interprets the instruction, deciding what needs to be done, such as checking if a jump is valid based on game physics.

• C) The CPU carries out the instruction, making the Roblox character actually jump on the screen.

• D) The CPU stores the instruction permanently so the action can be replayed later.

The CPU uses different types of buses to transfer data and instructions during the Fetch-Decode-Execute (FDE) Cycle).

Which three buses are used in the CPU to transmit data during the FDE cycle?

• A) Address Bus, Control Bus, Data Bus

• 
  B) Instruction Bus, Power Bus, Data Bus

• 
  C) Register Bus, Cache Bus, Control Bus

• 
  D) Memory Bus, Execution Bus, Address Bus

Which of the following is a function of the Control Unit (CU) in the CPU?

• A) Performing arithmetic and logical operations
  

• B) Storing data permanently
  

• C) Controlling the execution of instructions and managing communication between components
  

• D) Increasing the clock speed of the processor

What is the purpose of the Memory Address Register (MAR) in the CPU?

• A) To store the current instruction being executed
  

• B) To hold the address of the next instruction to be fetched from memory
  

• C) To perform calculations and logical operations
  

• D) To transfer data between input and output devices

What is stored in the Memory Data Register (MDR)?

• A) The result of an arithmetic calculation
  

• B) The instruction or data fetched from memory
  

• C) The memory address of the next instruction
  

• D) The clock speed of the processor

The Address Bus is responsible for:

• A) Carrying control signals to different parts of the CPU
  

• B) Transferring actual data between components
  

• C) Carrying memory addresses from the CPU to RAM
  

• D) Storing instructions for future use

What happens to the Program Counter (PC) after an instruction is fetched?

• A) It is reset to 0
  

• B) It moves to the instruction's operand
  

• C) It is incremented to point to the next instruction
  

• D) It stores the current instruction being executed

Why is the Fetch-Decode-Execute Cycle important in a computer system?

• A) It allows the CPU to process instructions step by step
  

• B) It increases the storage capacity of RAM
  

• C) It controls how data is sent to external devices
  

• D) It speeds up the internet connection