Olympiad Test Level 2: Fundamentals of Computer - 2 - Class 3 MCQ

• Memory Unit (MU): It stores information temporarily or permanently as per our need. (So, the correct match is (A) - (2).)
• Control Unit (CU): It works like a traffic policeman and manages all operations in the computer. (So, the correct match is (B) - (4).)
• Arithmetic and Logic Unit (ALU): It performs all arithmetic calculations (like adding, subtracting) and logical operations (like comparing). (So, the correct match is (C) - (1).)
• Central Processing Unit (CPU): It is the brain of the computer and controls all parts of the computer system. (So, the correct match is (D) - (3).)

Therefore, the correct answer is C: (A) - (2), (B) - (4), (C) - (1), (D) - (3).

Identifying the Jumbled Words:

• ATEBLT - TABLET
• PTALPO - LAPTOP

Category of the Words:

The words "TABLET" and "LAPTOP" belong to the category of hand-held computers. These devices are portable and designed for easy use while being held or placed on a surface. They combine the functionalities of desktop computers with the convenience of mobility.

The results of calculations like 60, 6, and 2 are typically stored in the Memory Unit of the computer.

• The Memory Unit temporarily stores data and results of operations.
• It holds outcomes from arithmetic calculations performed by the CPU.

Therefore, the correct answer is C: Memory Unit.

• Smartwatch (Option A): A smartwatch is controlled by a small integrated chip, often referred to as a microprocessor or SoC (System on Chip), which manages all its operations, from running apps to tracking health metrics.
• Laptop (Option B): A laptop is powered by a microprocessor (CPU) and other integrated chips on its motherboard. These chips handle processing, memory, and I/O functionalities.
• Desktop Computer (Option C): Like a laptop, a desktop computer's functionality is also governed by a CPU and other chips (e.g., GPU, memory controller) placed on the motherboard.

Since all the listed devices (smartwatch, laptop, and desktop computer) rely on small chips for their functionality, the correct answer is D: All of these.

A plotter is an output device used to produce high-quality graphics, drawings, and images on paper. It works similarly to a printer but is capable of producing larger and more precise designs. It outputs data from the computer to physical form on paper.

So, the correct answer is (a) Output.

A light pen is a pointing device that is used to interact with a computer screen. It is similar to a stylus or a digital pen and is used to draw or select items directly on the screen. When the light pen touches the screen, it senses the light emitted from the display and sends this input to the computer.

Thus, the correct answer is (d) Pointing device.

Smartphones are versatile and can perform many tasks that were once done on desktop PCs, such as:

• A: Surfing the internet - Smartphones allow browsing the web.
• B: Playing games - Many games can be played on smartphones.
• D: Downloading music - Music can be downloaded on smartphones.

However, smartphones cannot read a CD directly, as they do not have CD drives like desktop PCs or laptops. Thus, C: Reading a CD is the task that cannot be performed on a smartphone.

A joystick is a gaming device that is primarily used to control video games. It allows users to interact with games by moving it in different directions to control characters or objects within the game.

Thus, the correct answer is (c) To play games.

Peripherals are devices that are connected to the main computer to enhance its functionality. These devices are not essential for the basic functioning of the computer but add extra features. Examples include:

• Printer: Used for printing documents.
• Scanner: Used to scan images or documents.
• Flash drives: Used to store and transfer data.

Thus, the correct term for these devices is Peripherals.

The object in the image is a web cam, which is used for capturing video or images and is commonly used for video conferencing, live streaming, or taking photos. It is typically mounted on top of a computer monitor.

Thus, the correct answer is (b) Web cam.