Bus 230 Exam 2 Chapt 6

The case of the system unit is made of metal or plastic and protects the internal electronic components from damage.

On a personal computer, the various functions performed by the processor extend over many separate chips and often multiple circuit boards.

Custom-built computers often do not include recovery media to restore the computer in the event it fails.

A vendor of a custom-built computer will always offer the same service packages and warranty support as the vendor of a mass-produced computer.

Multi-core processor speed performance increases are especially noticeable when users are running multiple programs simultaneously.

A dual-core processor doubles the processing speed of a single-core processor.

Each processor core on a multi-core processor generally runs at a faster speed than a single-core processor.

Data needed by programs and applications enter memory from either an input device or a storage device.

Registers are part of the memory.

In the machine cycle, decoding is the process of obtaining a program instruction or data item from memory.

In the machine cycle, fetching refers to the process of translating instructions into signals the computer can execute.

In the machine cycle executing is the process of carrying out commands

In the machine cycle, executing is the process of carrying out commands.

Together, the four basic operations on a processor (fetching, decoding, executing, and storing) comprise a pipeline cycle.

Processors all use the same type of registers.

The speed of the system clock is one of the factors that influences a computer's performance.

The speed of the system clock has a significant effect on peripheral devices such as a printer or disk drive.

Liquid cooling technology uses a continuous flow of fluid(s) in a process that transfers the heated fluid away from the processor to a radiator-type grill, which cools the liquid, and then returns the cooled fluid to the processor.

A heat sink is a small ceramic or metal component with fins on its surface that absorbs and disperses heat produced by electrical components such as a processor.

Platform as a Service is also known as a virtual desktop.

A byte is uninformative because it provides only enough different combinations of 0s and 1s to represent 8 individual characters.

In the binary system, the digit 1 represents the electronic state of off (absence of an electronic charge).

A petabyte is equal to approximately 1 billion bytes.

When the computer's power is turned off, volatile memory does not lose its contents.

Saving is the process of copying items from a storage device such as a hard disk to RAM.

Dynamic RAM (DRAM) chips are faster and more reliable than any version of SDRAM chips.

L1 cache is built directly into a processor chip and usually has a very small capacity.

Two types of cache are memory cache and disk cache.

L2 cache is slightly faster than L1 cache but has a much smaller capacity.

When the processor needs an instruction or data, it searches memory in this order: L1 cache, then L2 cache, then L3 cache (if it exists), then RAM — with a greater delay in processing for each level it must search.

ROM is nonvolatile.

Most computers use flash memory to hold their startup instructions because it allows the computer easily to update its contents.

A microsecond is one-trillionth of a second.

The access time (speed) of memory has no effect on how fast a computer processes data.

Manufacturers and other retailers usually list a computer's memory in terms of its access time.

Having Plug and Play support means you can plug in a compatible device, turn on the computer, and then immediately begin using the device.

Buses transfer bits from input devices to memory, from memory to the processor, from the processor to memory, and from memory to output or storage devices.

The data bus transfers information about where the data should reside in memory, and the address bus transfers actual data.

The larger the number of bits handled by the bus, the slower the computer transfers data.

A DC adapter converts the DC power from the wall outlet into the AC power that the peripheral requires.

Computers with a smaller word size can process more data in the same amount of time than computers with a larger word size.

Built into the typical power supply is a fan that keeps the power supply cool.

Many batteries on computers and mobile devices can be charged only a certain number of times before they fail completely.

The batteries in mobile computers and devices typically are rechargeable lithium-ion batteries.

A can of compressed air can and should be used to free a keyboard from any dirt and debris that might interfere with the operation of the keys.

A blocked vent can prohibit heat from escaping, which ultimately can cause the computer or mobile device to overheat.

You should read reviews for programs and apps before you download and/or install them to make sure the program or app will meet your needs.

If you are using a desktop or laptop, you should defragment the computer's hard disk if you notice a decline in the computer's performance.

Programs and app that you no longer need may consume a significant amount of space on your computer or mobile device.

Inserting dirty media can physically damage a computer or mobile device's internal components.