Central Processing Unit (CPU) Quiz
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Questions and Answers

What does the Control Unit in a computer system do?

  • Determines which register is selected by the bus during each register transfer (correct)
  • Stores binary information in groups of bits
  • Carries data between the processor and memory unit
  • Holds intermediate arithmetic and logic results

Which register in a computer system holds the intermediate arithmetic and logic results?

  • PC
  • AC (correct)
  • MDR
  • CIR

What type of memory is used for temporary storage in a computer system?

  • ROM
  • Cache Memory
  • RAM (correct)
  • Secondary Memory

What are buses in a computer system primarily used for?

<p>Transferring information between registers (B)</p> Signup and view all the answers

Which register in a computer system contains the current instruction during processing?

<p>CIR (D)</p> Signup and view all the answers

What is the role of the Address Bus in a computer system?

<p>Carries the address of data between the processor and memory (D)</p> Signup and view all the answers

What is the main function of the Control Unit in a computer system?

<p>Control the operations of components like ALU, memory, and input/output devices (B)</p> Signup and view all the answers

Which component of the CPU contains the address of the instructions to be fetched?

<p>Control Unit (CU) (D)</p> Signup and view all the answers

What type of operations does the Arithmetic and Logic Unit (ALU) perform?

<p>Arithmetic and logic operations (D)</p> Signup and view all the answers

Which register in the CPU holds the memory location of the data that needs to be accessed?

<p>Memory Address Register (MAR) (C)</p> Signup and view all the answers

What does the Instruction Register in the CPU store?

<p>Instructions fetched from memory for execution (D)</p> Signup and view all the answers

Which component in the CPU allows for arithmetic and logic operations to be carried out?

<p>Arithmetic and Logic Unit (ALU) (B)</p> Signup and view all the answers

Which device is used to move the cursor position on a computer screen?

<p>Joystick (C)</p> Signup and view all the answers

What type of device is a keyboard in a computer system?

<p>Input device (B)</p> Signup and view all the answers

Which pointing device cannot be used to enter text into a computer?

<p>Mouse (D)</p> Signup and view all the answers

What feature distinguishes a scanner from other input devices?

<p>Works like a photocopy machine (C)</p> Signup and view all the answers

Which device has sets of keys for letters, numbers, characters, and functions?

<p>Keyboard (A)</p> Signup and view all the answers

What is the primary function of an input device in computing?

<p>Entering data into the computer (A)</p> Signup and view all the answers

Flashcards

What does the Control Unit do?

The Control Unit is responsible for selecting which register is used during data transfers. Think of it as a traffic controller, directing data between different storage places in the computer.

What does the Arithmetic and Logic Unit (ALU) do?

The Arithmetic and Logic Unit (ALU) performs calculations and logical operations. Think of it as the brain of the computer.

Temporary Storage

Temporary storage is known as RAM, or Random Access Memory. Data stored in RAM is easily accessed and updated.

What are buses used for?

Buses are like 'highways' for data, transferring information between different computer system components, often used for storage.

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What does the Instruction Register (IR) store?

The Instruction Register (IR) stores the current instruction that the CPU is working on. Think of it as the CPU's 'to-do' list.

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What does the Address Bus carry?

The Address Bus carries the memory location of data being accessed. Think of it as the street address for data.

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What is the role of the Control Unit?

The Control Unit (CU) acts as the 'director' in a computer, controlling all the operations of the ALU, memory, and input/output devices. Think of it as the heart of the computer!

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What is stored in the Control Unit (CU)?

The Control Unit (CU) contains the address of the instructions that need to be fetched. Think of it as the 'GPS' for the CPU.

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What does the Memory Address Register (MAR) hold?

The Memory Address Register (MAR) keeps track of the location of data stored in memory, like a postal address.

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What does the Instruction Register (IR) store?

The Instruction Register (IR) stores the instructions that are fetched from memory, like the instructions in a recipe.

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What does the Arithmetic and Logic Unit (ALU) do?

The Arithmetic and Logic Unit (ALU) allows the CPU to perform calculations and logical operations. Think of it as the CPU's workhorse, doing the heavy lifting.

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What is a joystick?

A joystick is used to control the cursor - a small object that moves on the computer screen.

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What is a keyboard?

A keyboard is a primary input device, used to type in text and numbers.

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Why can't a joystick type?

Unlike a mouse, a joystick isn't used to enter text. It's meant for controlling movement.

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Describe a scanner as an input device

A scanner is a specialized input device that creates digital copies of images or documents in a way similar to a photocopy machine.

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What keys are standard on a keyboard?

A keyboard is a collection of keys designed for letters, numbers, characters, and special functions.

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What is the role of an input device?

Input devices play a critical role in computing by allowing users to enter data into the computer.

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Study Notes

Control Unit and Registers

  • The Control Unit retrieves and decodes instructions, generates control signals, and manages data transfer between registers and memory.
  • The Arithmetic and Logic Unit (ALU) performs arithmetic and logical operations, such as addition, subtraction, AND, and OR.
  • The Accumulator register holds intermediate arithmetic and logic results.
  • The Program Counter (PC) register contains the address of the instructions to be fetched.
  • The Instruction Register (IR) stores the current instruction being processed.

Memory and Bus

  • Random Access Memory (RAM) is used for temporary storage.
  • Buses are primarily used for data transfer between components, such as instructions, data, and addresses.

Address Bus

  • The Address Bus is used to transmit the memory address of the data to be accessed.

CPU Components

  • The Arithmetic and Logic Unit (ALU) performs arithmetic and logical operations.
  • The Program Counter (PC) contains the address of the instructions to be fetched.

Input Devices

  • A keyboard is a type of input device that has sets of keys for letters, numbers, characters, and functions.
  • A mouse is a pointing device used to move the cursor position on a computer screen.
  • A scanner is an input device that can read text and images, distinguishing it from other input devices.
  • The primary function of an input device is to allow users to interact with the computer and enter data.

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Description

Test your knowledge on the Central Processing Unit (CPU) and its role in executing programs using the fetch-decode-execute cycle. Explore the functions and components of the CPU that are essential for data processing operations.

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