IT Essentials: Chapters 1 To 10

Power fluctuations can lead to variations in the voltage and current supplied to a computer system. These fluctuations can introduce unwanted electrical disturbances known as noise. Noise can disrupt the normal functioning of the system and interfere with the signals being processed. This can result in errors, data corruption, and malfunctions in the computer system. Therefore, the presence of noise in the power supply can have detrimental effects on the overall performance and reliability of the system.

An antivirus program is designed to protect against various types of malicious software such as viruses, malware, spyware, mason-ware, and grayware. It scans files and programs on a computer to detect and remove any malicious code or potentially harmful threats. By regularly updating virus definitions and providing real-time protection, antivirus software helps to safeguard the system and prevent infections that can compromise data security and privacy.

Standoffs are small metal or plastic spacers that are used to elevate and separate the motherboard from the bottom of the case. By installing the motherboard on top of standoffs, it prevents the motherboard from making direct contact with the case, which could cause electrical shorts or damage to the components. The standoffs ensure that there is enough space between the motherboard and the case, allowing for proper airflow and preventing any potential grounding issues.

Open sauce is not a specific type of operating system. Linux and Ubuntu, on the other hand, are both examples of open-source operating systems. Linux is a widely used open-source operating system kernel, while Ubuntu is a popular open-source Linux distribution. Therefore, the correct answer is Linux, Ubuntu.

The correct answer is WAN. The internet is a Wide Area Network (WAN) that connects computers and devices across the globe, allowing them to communicate and share information. The options "anonymous" and "we are legion" do not accurately describe the type of network the internet is.

Adware is a type of malicious program that displays advertisements on a user's computer. These ads typically promote products or services at low prices with next day delivery. While adware may not always steal bank account information, it can still be intrusive and annoying. It is important to be cautious and use antivirus software to protect against adware and other malicious programs.

NTFS (New Technology File System) is the recommended file system for current Microsoft Windows for large file support and enhanced security. NTFS supports files larger than 4GB, provides better data protection through features like file and folder permissions, encryption, and disk quotas. It also has built-in fault tolerance capabilities and supports journaling, which helps in recovering from system crashes. NTFS is the default file system for Windows and offers improved performance and reliability compared to other file systems like FAT and FAT32.

ESD stands for Electrostatic Discharge. It refers to the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown. ESD can cause permanent damage to electrical components if proper tools and safety procedures are not followed. This is because the discharge can create a high voltage that exceeds the tolerance of the components, leading to their failure or degradation. Therefore, ESD is the correct answer as it highlights the potential danger and need for precautions when working with electrical components.

The correct answer is Molex. Molex is the type of power connector that should be used to connect to an optical drive. Molex connectors are commonly used in computer hardware and provide a secure and reliable connection for power supply. They have multiple pins and are designed to deliver power to various devices, including optical drives.

EPROM stands for Erasable Programmable Read-Only Memory. It is a type of ROM that can be erased and reprogrammed multiple times using ultraviolet (UV) light. EPROMs have a transparent quartz window on top that allows the UV light to penetrate and erase the memory contents. This makes EPROMs ideal for applications where the stored data needs to be changed or updated periodically. Unlike other types of ROMs, EPROMs require physical exposure to UV light for erasing, making them non-volatile and retaining the stored data even when power is turned off.

The two most important skills for a successful computer technician to possess are communication and computer repair. Communication is crucial for effectively understanding and addressing the needs of clients, as well as collaborating with colleagues. Computer repair skills are essential for diagnosing and fixing technical issues, ensuring the smooth functioning of computer systems.

The correct answer is "Format". Format is a disk management tool that allows you to prepare a hard drive for storing information. It erases all existing data on the drive and sets up a file system, making the drive ready for use. Other options mentioned, such as Fdisk, Disk Cleanup, Defrag, and Scandisk, are not specifically designed for preparing a hard drive but rather for partitioning, cleaning up unnecessary files, optimizing performance, and checking for errors respectively.