Lesson 3: Looking Inside The Computer

Replacing notebook or hand-held device parts typically requires specialized knowledge and skills. It is not recommended for individuals without proper training to attempt to replace parts themselves, as it can lead to further damage or malfunction. Therefore, it is generally advised to have professionals handle the task of replacing parts in these devices.

A handheld computer refers to any portable device that can be held in the palm of the hand. This term is used to describe devices such as smartphones, tablets, and personal digital assistants (PDAs). These devices are designed to be compact and lightweight, allowing users to easily carry them around and use them on the go. They typically have touchscreens or small keyboards for input, and offer various functionalities such as internet browsing, email, and productivity applications. The term "handheld computer" is used to distinguish these devices from larger, stationary computers like laptops and desktops.

The correct answer is Central Processing Unit (CPU). The CPU is often referred to as the "brain" of the computer because it is responsible for executing instructions and performing calculations. It is the main component that carries out the majority of the computer's processing tasks, including controlling and coordinating the operations of other hardware components. The CPU consists of an arithmetic logic unit (ALU) and a control unit, which work together to process data and instructions. It is an essential part of the computer system and plays a crucial role in determining the overall performance and functionality of the computer.

The motherboard is the main circuit board of a computer that provides communication pathways between various components and connected devices. It acts as a central hub, allowing data and instructions to be exchanged between the CPU, memory, storage devices, and other peripherals. Without a motherboard, the components would not be able to communicate with each other, rendering the computer inoperable. Therefore, the statement "Motherboard provides communication pathways to components and connected devices" is true.

The given correct answer is "Music Player" because it specifically mentions that it stores, organizes, and plays audio files only. This implies that it is designed specifically for playing music and not for other media formats like videos or e-books. Therefore, options like Video Player, E-Reader, and PDA can be eliminated as they are not solely dedicated to playing audio files.

A computer that is designed to be small and light and works with a rechargeable battery is called a notebook. Notebooks are portable and convenient for users who need to work on the go. They typically have a smaller form factor compared to desktop computers and are powered by a rechargeable battery, allowing for mobility without the need for a constant power source.

Memory capacity and storage space are measured in bits and bytes. Bits are the smallest unit of information in computing and can represent either a 0 or a 1. Bytes, on the other hand, are a group of 8 bits and are used to represent larger units of data. By measuring memory capacity and storage space in bits and bytes, we can accurately quantify the amount of information that can be stored or processed by a computer system.

A computer that sits on, beside, or under a desk is called a desktop. This type of computer is typically larger and more powerful than a laptop or tablet, and is designed to be used in a stationary location. It is commonly used for tasks such as office work, gaming, and multimedia production. The term "desktop" refers to its physical placement, as it is meant to be used on a desk rather than being portable like a laptop or tablet.

A media player is a device or software that allows users to view movies, videos, or books. It is designed specifically for playing various types of media files, providing a user-friendly interface and playback controls. With a media player, users can easily access and enjoy their favorite movies, videos, or books without any hassle. It supports different file formats and often offers additional features such as playlist creation, audio visualization, and subtitle support.

A mobile computing device that is larger than a mobile or PDA is called a Tablet PC. This device combines the portability and touch-screen features of a mobile or PDA with a larger screen size, making it ideal for tasks that require more screen real estate, such as reading documents, browsing the internet, or watching videos. Tablet PCs often have more advanced hardware and operating systems compared to mobiles or PDAs, allowing them to perform more complex tasks and run a wider range of applications.

A computer that primarily provides files or services to other systems on a network is called a server. Servers are designed to handle multiple requests from clients and are often used in businesses or organizations to store and manage data, host websites, or run applications. They are typically more powerful and have more storage capacity than regular desktop computers or notebooks. PDAs (Personal Digital Assistants) are handheld devices used for personal organization and communication, while desktops and notebooks are general-purpose computers used by individuals for various tasks.

The given statement is false. Servers are generally more expensive than desktop systems. Servers are designed to handle heavy workloads, have more processing power, larger storage capacity, and are built with higher quality components to ensure reliability and performance. On the other hand, desktop systems are designed for individual use and have lower specifications and components, making them less expensive.

Notebook or laptop computers offer the advantage of portability. Unlike desktop computers, laptops can be easily carried and used anywhere, making them convenient for users who are constantly on the move or need to work in different locations. This portability allows users to have access to their files, software, and internet connection wherever they go, making it easier to work or stay connected while traveling or away from a fixed workspace.

RAM (Random Access Memory) is considered as a volatile memory. Volatile memory refers to a type of memory that requires constant power to retain data. RAM is volatile because it loses all stored data once the power supply is disconnected or turned off. This is in contrast to non-volatile memory like ROM (Read-Only Memory) or hard disk, which can retain data even without power. CPU (Central Processing Unit) is not a memory but rather the brain of a computer that performs calculations and executes instructions.

An e-reader is a specialized hand-held device designed specifically for downloading and viewing electronic copies of published works. It allows users to access and read digital books, magazines, newspapers, and other written content. Unlike a server, music player, or media player, an e-reader is specifically tailored to provide a comfortable reading experience with features such as adjustable font sizes, backlighting, and long battery life. Therefore, an e-reader is the correct answer in this case.

A byte is a group of eight bits. In computer systems, information is stored and manipulated in binary format, where each bit represents a 0 or 1. A byte provides the basic unit of storage and processing, typically representing a single character or a small amount of data. By grouping eight bits together, the byte allows for a wider range of values to be represented, from 0 to 255. Therefore, the correct answer is "eight".

The statement is false because a video player is not called an MP3 player or digital audio player. A video player is specifically designed for playing video files, while an MP3 player or digital audio player is designed for playing audio files. These are different devices with different functionalities, so it would be incorrect to refer to a video player as an MP3 player or digital audio player.

A byte is not a single binary digit, but rather a unit of digital information that consists of 8 bits. Each bit in a byte can be either a 0 or a 1, representing a binary value. Therefore, the statement that a byte is a single binary digit is incorrect.

Hz stands for hertz, which is a unit of frequency or cycles per second. It is commonly used to measure the speed of a CPU (Central Processing Unit) in a computer. A higher frequency or more cycles per second indicates a faster CPU speed. Therefore, Hz is the correct answer for this question.

A netbook is a smaller and less expensive version of a notebook computer. It is designed to be lightweight and portable, making it ideal for basic tasks such as web browsing, email, and document editing. Netbooks typically have smaller screens and less powerful hardware compared to notebooks, but they offer a more affordable option for users who prioritize mobility and cost-effectiveness.

RAM stands for Random Access Memory. It is the main memory of a computer and acts as an electronic memory pool. RAM is responsible for temporarily storing and providing quick access to the "working copies" of programs and data that the computer needs to perform tasks. Unlike the hard disk or ROM, RAM is volatile memory, meaning its contents are lost when the computer is turned off. Therefore, RAM plays a crucial role in the overall performance and speed of a computer.

RAM (Random Access Memory) is a type of computer memory that stores data and instructions that are currently being used by the computer. It does not process information or instructions at different speeds measured in hertz (Hz). The processing speed of a computer is determined by the CPU (Central Processing Unit), not the RAM. Therefore, the statement is false.

ROM, or Read-Only Memory, is a type of computer memory that stores data that cannot be modified or erased. It is responsible for several functions, including starting the computer, checking system memory, and loading the operating system. However, ROM is not responsible for processing data. Processing data is typically done by the computer's central processing unit (CPU), which retrieves data from other types of memory, such as random-access memory (RAM), and performs calculations or operations on it. Therefore, the correct answer is "Processing data."

The correct answer is Hz. Hz stands for Hertz, which is the unit of measurement for frequency. In the context of a microprocessor, Hz refers to the clock speed or the number of cycles per second that the processor can execute. A higher clock speed typically indicates a faster processor, allowing it to perform more calculations or instructions per second. Therefore, Hz is the appropriate unit of measurement for a microprocessor's measurement unit.

A netbook is a type of computer that is specifically designed for wireless communications and accessing the internet. It is typically smaller and lighter than a traditional laptop, making it ideal for portable use. However, netbooks usually have limited storage capacity, making them less suitable for storing large data files. Therefore, netbooks are primarily intended for individuals who prioritize wireless connectivity and internet access over data storage capabilities.