IT Essentials Chapter 1 V5.0

A digital camera is considered an input device because it allows users to capture and input images or videos into a computer or other devices. It takes in visual information and transfers it to a digital format for storage or further processing. A biometric authentication device is also an input device as it collects and inputs biometric data, such as fingerprints or facial recognition, to verify a user's identity. Both these devices take in external information and input it into a system or device for various purposes.

An SSD (Solid State Drive) would be the best hard drive upgrade to improve performance while providing more reliability and using less power. SSDs have faster read and write speeds compared to traditional hard drives, which would greatly enhance the gaming experience. Additionally, SSDs have no moving parts, making them more reliable and less prone to mechanical failure. They also consume less power, resulting in longer battery life for gaming laptops or reduced electricity usage for desktop PCs.

Large amounts of fast RAM would allow the processor in a gaming PC to provide optimal gaming performance because RAM is responsible for storing and quickly accessing data that the processor needs to perform tasks. In gaming, a large amount of fast RAM allows for smoother gameplay and faster loading times as it can store more game data and quickly retrieve it when needed. This helps to prevent lag and improve overall performance, making it an essential hardware upgrade for optimal gaming experience.

The chipset is responsible for controlling the communications and interactions between the CPU and other components on the motherboard. It manages the flow of data and instructions between the CPU, memory, storage devices, and other peripherals. The chipset also plays a crucial role in determining the capabilities and compatibility of the motherboard, as it provides support for various features such as USB, SATA, PCI-E, and audio/video interfaces.

When building a workstation that will run multiple virtual machines, the number of CPU cores is important because each virtual machine requires processing power, and having more cores allows for better multitasking and performance. Additionally, the amount of RAM is crucial as each virtual machine needs memory to operate efficiently, and having enough RAM ensures smooth operation and prevents performance bottlenecks.

SRAM (Static Random Access Memory) is primarily used as cache memory. Unlike DRAM (Dynamic Random Access Memory) which requires constant refreshing to retain data, SRAM retains data as long as power is supplied. SRAM is faster and more expensive than DRAM, making it ideal for cache memory which needs to provide quick access to frequently used data. RAM (Random Access Memory) and ROM (Read-Only Memory) are not typically used as cache memory.

The three devices that are considered output devices are headphones, monitor, and printer. Headphones are used to output audio signals, allowing the user to listen to sound. Monitors display visual information and output it to the user. Printers produce hard copies of digital information, such as documents or images, as output for the user.

The correct answer is revolutions per minute. This unit of measurement is used to indicate the speed of a hard drive. It refers to the number of times the hard drive platter rotates in one minute. A higher RPM generally means faster read and write speeds, resulting in improved performance.

A 7-pin connector can be used to connect an eSATA interface to an external SATA drive. This is because eSATA uses a 7-pin connector, which provides a faster and more reliable connection compared to other types of connectors. The 7-pin connector ensures that the necessary data and power signals are properly transmitted between the eSATA interface and the external SATA drive, allowing for efficient data transfer and communication.

The input voltage selection can be changed from 110 volts to 220 volts on a computer system by adjusting the settings on the back of the power supply.

The exhibit is not provided, so it is not possible to determine the exact type of adapter shown. However, based on the given options, the most likely correct answer is "network interface" as it is commonly used to connect a computer to a network.

When choosing a computer case, two factors that must be considered are the size of the motherboard and the power supply, as well as the number of internal drive locations. The size of the motherboard and power supply is important because it determines if they will fit properly within the case. The number of internal drive locations is also crucial as it determines how many storage devices can be installed in the case. The size of the monitor, the number of LED indicators, and the vendor that manufactured the motherboard are not directly related to the selection of a computer case.

The 24-pin connector on a motherboard is used to connect the power supply. The power supply is responsible for providing the necessary electrical power to all the components of the computer. By connecting the power supply to the motherboard via the 24-pin connector, the motherboard can receive the required power to function properly.

DDR-400 is the correct answer because it has a front side bus speed of 200 MHz. DDR-400 is a type of DDR memory module that operates at a clock speed of 200 MHz, which is double the bus speed. This means that it can transfer data at a rate of 400 million transfers per second. The other options, DDR3-667, PC100 SDRAM, and DDR-333, do not have a front side bus speed of 200 MHz.

The correct answer is AGP. AGP (Accelerated Graphics Port) is a type of video card expansion slot that was commonly used in older computer systems. It provided a faster connection between the graphics card and the motherboard, allowing for improved performance in graphics-intensive applications. This slot is depicted in the exhibit.

The Northbridge part of the chipset is responsible for controlling access to the RAM and the video card. It manages the communication between the CPU and these two components, ensuring efficient data transfer and coordination. The Northbridge allows the CPU to access and retrieve data from the RAM, which is essential for the computer's operation. It also controls access to the video card, allowing the CPU to send graphics data and instructions to be displayed on the monitor.

The correct answer is tape drive and hard disk drive. Tape drives and hard disk drives both use a magnetic medium, such as magnetic tape or magnetic disks, to store data. In tape drives, data is stored on a magnetic tape that is wound around a spool, while in hard disk drives, data is stored on magnetic disks or platters that spin at high speeds. Both of these storage devices rely on the magnetic properties of the medium to read and write data.

The cable shown in the graphic is a serial cable. Serial cables are used to transfer data one bit at a time, sequentially, over a single communication line. They are commonly used for connecting devices such as modems, printers, and routers to computers.

Before selecting a power supply, two pieces of information that are needed are the total wattage of all components and the form factor of the case. The total wattage of all components is important to ensure that the power supply can provide enough power for all the components in the system. The form factor of the case is important because it determines the physical size and shape of the power supply, and it needs to be compatible with the case in order to fit properly. The other options, such as the voltage requirements of peripheral devices, the type of CPU, and the installed operating system, are not directly related to the selection of a power supply.