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

The control unit (CU) of a computer's central processing unit (CPU) directs the flow of data within the computer. It manages the operations of the processor by controlling the sequence of instructions and the movement of data within the system. The Arithmetic Logic Unit (ALU), not the CU, is responsible for the performance of all arithmetic and logical operations.

Computers are great for watching movies, playing games, and doing math, but they can't cook food. They help us with lots of tasks, but cooking isn't one of them.

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 used to talk and give verbal commands.

Computers are used to send radar signals to ships.

Computers are used by doctors to write prescriptions, they are used with ultrasound scanners to help in diagnosing diseases and are also used to track location with the help of GPS.

Computers help scientists in launching rockets by controlling and monitoring the systems. They are also used for playing games, which makes option D the correct answer because it includes both activities.

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.