Computer Systems - Lesson 7 - Fetch-Decode-Execute Cycle

What is the basic operation of a computer called?

• Memory-access cycle

• Fetch-decode-execute cycle

• Input-output cycle

• Processing cycle

Answer explanation

The basic operation of a computer is called the Fetch-decode-execute cycle, where it retrieves instructions from memory, decodes them, and executes them.

Where does the CPU fetch the instructions from?

• Cache memory

• Secondary storage

• Main memory

• Registers

Answer explanation

The CPU fetches instructions from the main memory. Main memory holds the data and instructions that the CPU needs to process.

What does the CPU do after decoding the binary code?

• Wait for user input

• Execute the instruction

• Store the instruction in memory

• Fetch the next instruction

Answer explanation

After decoding the binary code, the CPU executes the instruction. It does not wait for user input, store the instruction in memory, or fetch the next instruction.

How many times does the fetch-execute cycle happen in modern computers per second?

• Thousands

• Hundreds

• Millions

• Billions

Answer explanation

The fetch-execute cycle happens millions of times per second in modern computers, making the correct answer 'Millions'.

What is the purpose of the CPU in the fetch-decode-execute cycle?

• Display images on the screen

• Interact with peripherals

• Understand and execute instructions

• Manage power consumption

Answer explanation

The purpose of the CPU in the fetch-decode-execute cycle is to understand and execute instructions, not to display images, interact with peripherals, or manage power consumption.

What is the purpose of the ALU in a computer?

• Perform arithmetic and logic operations

• Display graphical user interface

• Manage file storage

• Control network connections

Answer explanation

The purpose of the ALU in a computer is to perform arithmetic and logic operations, making it the correct choice.

Which component of a computer is responsible for temporarily storing data?

• Hard drive

• RAM

• Monitor

• Keyboard

Answer explanation

RAM is responsible for temporarily storing data in a computer, making it the correct choice among the options provided.

What is the function of the control unit in a CPU?

• Perform calculations

• Manage memory allocation

• Control the flow of data within the CPU

• Handle input/output operations

Answer explanation

The control unit in a CPU is responsible for controlling the flow of data within the CPU, coordinating the execution of instructions, and managing the data transfer between the CPU and other components.