Olympiad Test Level 1: Fundamentals of Computer - 1 - Class 3 MCQ

The control unit (CU) of a computer's central processing unit (CPU) plays a crucial role in managing data. It is responsible for:

• Directing the flow of data within the computer.
• Controlling the sequence of instructions executed by the processor.
• Overseeing the movement of data within the system.

It is important to note that the Arithmetic Logic Unit (ALU), not the CU, handles all arithmetic and logical operations.

Computers are useful devices that can perform various tasks, including:

• Watching movies - You can enjoy films and videos.
• Solving sums - They assist with calculations and math problems.
• Playing games - You can engage in various games for entertainment.

However, it is important to note that:

• You cannot cook food with a computer.

While computers support many activities, cooking is not one of their capabilities.

The full form of CD is Compact disc. It is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982. The format was originally developed to store and play only sound recordings (CD-DA) but was later adapted for storage of data (CD-ROM).

Computers understand instructions as electronic signals, not mechanical ones. They use these electronic signals to process information and follow commands.

The mouse cable is usually connected to the computer, not the monitor. Monitors don't have ports to plug in a mouse; they only display what the computer tells them to show.

A microphone is a device that allows you to talk and give verbal commands to a computer.

• Microphones convert sound waves into electrical signals.
• They are essential for voice recognition systems.
• Used in various applications, including:
• Voice assistants
• Video conferencing
• Recording audio

Using a microphone enables hands-free interaction with your computer.

Computers play a vital role in sending radar signals to ships.

This functionality is crucial for navigation and communication at sea.

• They help in tracking the position of vessels.
• Radar systems enhance safety by detecting obstacles.
• Computers process data to provide real-time information.

Overall, computers significantly improve maritime operations.

Computers are used in hospitals for various essential tasks:

• Doctors use computers to write prescriptions.
• They assist with ultrasound scanners for diagnosing diseases.
• GPS technology helps in tracking emergency locations.

Overall, computers play a crucial role in enhancing hospital operations and patient care.

Computers help scientists by doing important work like controlling and monitoring rockets when they are launched. This makes it possible for rockets to go to space safely.

This statement is incorrect because banks issue both debit cards and credit cards, not just debit cards. The other statements correctly describe typical banking activities involving computers.