Quiz - ICT Systems

The purpose of the central processing unit (CPU) in a system is to carry out instructions of a computer program. The CPU is responsible for executing the instructions provided by the computer program, performing calculations, and managing the overall operation of the system. It is often referred to as the "brain" of the computer as it performs the majority of the processing tasks necessary for the system to function properly. Without the CPU, a computer would not be able to execute programs or perform any computational tasks.

The given options are all components of a computer system. Among them, the motherboard is the main circuit board that connects and allows communication between various hardware components such as the CPU, memory, storage devices, and peripherals. It provides the necessary electrical connections and interfaces for these components to work together effectively. Therefore, the correct answer is Motherboard.

The statement "RAM stands for Random Access Memory" is true. RAM is a type of computer memory that allows data to be read or written in almost the same amount of time regardless of the physical location of data inside the memory. It is a volatile memory, meaning that it loses its data when the power is turned off. Random Access Memory is a crucial component in computers as it provides fast and temporary storage for data that is actively being used by the computer's processor.

Binary code is a system of representing information using only two digits: 0 and 1. These digits are used to represent the two possible states of a binary digit, also known as a bit. In binary code, 0 represents the absence of a signal or a low voltage, while 1 represents the presence of a signal or a high voltage. Therefore, the correct answer is 0 and 1.

USB stands for Universal Serial Bus. It is a common interface that allows different devices to be connected to a computer. The USB technology enables the transfer of data and power between devices, making it a widely used and versatile standard in the computer industry.

A microphone is primarily an input device that converts sound waves into electrical signals. It captures audio and sends it to a recording or amplifying device. While some microphones may have built-in speakers for monitoring purposes, their main function is to receive sound, making them predominantly an input device. Therefore, the statement that a microphone is both an input and output device is incorrect.

ROM (short for Read Only Memory) is a type of computer memory that permanently stores data and instructions. It is called "read-only" because the data stored in ROM cannot be modified or erased by normal computer operations. Unlike other types of memory, ROM retains its contents even when the computer is turned off. This makes it ideal for storing essential system instructions and firmware that are necessary for the computer to boot up and function properly.

The purpose of the BIOS (Basic Input/Output System) in a computer system is to load the operating system (OS). The BIOS is responsible for initializing hardware components, performing system checks, and loading the OS into the computer's memory. It is the first software that runs when the computer is powered on, and it acts as a bridge between the hardware and the OS. By loading the OS, the BIOS allows the computer to start up and enables the user to interact with the system.

LCD stands for Liquid Crystal Display. This technology is commonly used in electronic devices such as televisions, computer monitors, and smartphones. The term "liquid crystal" refers to the unique properties of the material used in the display, which can change its optical properties when an electric current is applied. The liquid crystals are sandwiched between two layers of polarized glass, and when the electric current is applied, they align to allow or block light, creating the images and colors that we see on the screen.

This question is asking for the icon that represents "USB". USB stands for Universal Serial Bus, which is a common interface used for connecting devices to a computer. The USB icon typically features a trident-shaped symbol with a vertical line intersecting it, representing the connection between devices.

The statement is false because a newer user interface, such as that included in Windows 8, is typically more resource intensive than an older, less optimized command line interface such as MS-DOS. This is because newer user interfaces often have more features and graphical elements that require more processing power and memory to run smoothly.

The two features of a GUI (Graphical User Interface) are Windows and Icons. Windows refer to the individual graphical elements that display information or provide functionality within an application. Icons, on the other hand, are small graphical representations that represent files, folders, or actions and are used to navigate and interact with the GUI. Both Windows and Icons are essential components of a GUI as they facilitate user interaction and provide a visual representation of the system's functionalities.

The maximum size a JPEG can be is 65535 X 65535. This is because JPEG uses 16-bit unsigned integers to represent the dimensions of an image, and the maximum value for a 16-bit unsigned integer is 65535. Therefore, the largest possible dimensions for a JPEG image are 65535 pixels in width and 65535 pixels in height.