Explanation:
The hard disk, which was referred to as "hard" in contrast to "floppy" disks, which were used to store data in early personal computers, is what a computer uses to store permanent data. Through the drive heads of the hard disk, a magnetic field is produced. Despite the fact that data storage is thought to be permanent, a failed hard drive could cause data loss. Similarly, deleted data can frequently be recovered, posing a security risk for equipment that has been decommissioned.
Explanation:
Processor, memory, and input/output are the three components that makeup Von Neumann's 1945 model of computer architecture. This three-part model combines both program and data memory. The control unit and the arithmetic/logic unit are both parts of the processor. This model's memory serves as a place to store both data and operational instructions. Compared to the later Harvard model of computer architecture, which consists of four components—a CPU, input/output, program memory, and data memory—this model is less complicated.
Explanation:
A unique identifier that is acceptable in addition to a name is the birthdate. Alphanumeric strings (like those used for ID numbers) and social security numbers are examples of additional unique identifiers. The ability to change a unique identifier should be difficult (although names alone can be changed). Age and other variables that change over time, like hair color, are not reliable indicators of identity. Gender may be fluid in some people, may be faked, and may not be obvious, so it is insufficient as a unique identifier.
Explanation:
A system with fine granularity typically requires more time, resources, and/or effort to complete a task, like retrieving data. This is referred to as increased overhead. According to the metaphor of sand used to describe granularity, a system with coarse granularity has data organized into larger entities (components), whereas a system with fine granularity has the same entities divided. For instance, all identifying data (name, birthdate, and ID number) may be contained in one field with coarse granularity, but with fine granularity, each piece of information is contained in a separate field.
Explanation:
Verdana or Arial are excellent fonts to use when creating a user interface or website. They are both widely used because they are san serif, which makes them simpler to read on a computer screen than serif fonts like Times New Roman. Fonts that resemble typewriter text are frequently more difficult to read on screens, and handwriting-like fonts should be avoided because they are both more difficult to read and seem less professional.
Explanation:
OSHA's ergonomic standards stipulate that the seating must be cushioned with a rounded front rather than a sharp line to prevent pressure on the back of the legs when a user is using a computer to input or retrieve data. The user's trunk must be perpendicular to the back support or slightly leaned backward; it must not be leaning forward as this could strain the back. The feet must be flat on the floor, and the forearms, wrists, and hands must all be parallel to the keyboard.
Explanation:
A modem's function is to enable internet connectivity. A modem can be an external device or integrated into a computer. The most common methods of connectivity are a cable or phone (DSL). To facilitate simple data transmission, the modem simultaneously encrypts and decrypts digital information. The number of bits per second (bps) or bytes per second (B/s) that a modem can transmit determines how they are typically categorized.
