Answer: A CD-RW can be written to, but a CDROM can only be read from

Explanation:

The main difference between a CD-ROM and a CD-RW is that a CD-ROM can only be read from, while a CD-RW can be written to and erased multiple times. Therefore, the answer is (c) A CD-RW can be written to, but a CD-ROM can only be read from.

Answer: Data in ROM is nonvolatile, that is, it remains there even without electrical power

Explanation:

The correct answer is (b) Data in ROM is nonvolatile, that is, it remains there even without electrical power, which makes it useful. ROM (Read-Only Memory) is a type of non-volatile memory that is used to store firmware and other permanent data in a computer system. The data stored in ROM is not erased when the computer is turned off or restarted, which means it remains there even without electrical power. This characteristic of ROM makes it useful for storing critical system data that needs to be accessed quickly at startup, such as the BIOS (Basic Input/Output System) firmware that controls the initial boot process of a computer. Unlike RAM (Random Access Memory), which is a volatile memory that loses its data when the computer is turned off or restarted, ROM is not affected by power loss or disruptions. The other options listed are not true for ROM: ROM information cannot be easily updated, ROM does not provide large amounts of inexpensive data storage, and ROM chips are not easily swapped between different brands of computers.

Answer: computer hardware

Explanation:

A computer's ROM (Read-Only Memory) is computer hardware. It is a type of non-volatile memory that stores firmware and other software instructions that are required for booting up the computer and running basic input/output system (BIOS) routines.

Answer: Indexes

Explanation:

Indexes increase the accuracy of a search by fine-tuning the keywords in the search.

Answer: CD-RW disks

Explanation:

The correct answer is (b) CD-RW disks. CD-RW stands for CD-ReWritable, and as the name suggests, it is a type of CD that can be written, erased, and rewritten multiple times. In contrast, CD-R disks (CD-Recordable) can only be written to once. Zip disks and Opti-Disks are types of storage media that are not rewritable.

Answer: non-volatile storage

Explanation:

Storage that retains its data after the power is turned off is referred to as non-volatile storage. Non-volatile storage is a type of computer memory or storage device that can retain data even when power is turned off or lost, unlike volatile storage, which requires a continuous supply of power to maintain its data. Examples of non-volatile storage include hard disk drives, solid-state drives, flash memory, and ROM (Read-Only Memory). Volatile storage, on the other hand, refers to temporary memory that requires power to retain its contents, such as RAM (Random Access Memory). Sequential storage and direct storage are not specific types of storage, but rather refer to different methods of accessing or storing data. Mobile storage refers to storage devices that are designed to be easily transported or used with mobile devices, such as USB drives or SD cards.

Answer: Hard disk

Explanation:

(d) Hard disk is the most common storage device for personal computers. Hard disks are internal storage devices that store large amounts of data permanently and are used to store the operating system, software programs, and user files. Floppy disks, Zip disks, and USB thumb drives/pen drives are external storage devices that are not as commonly used as hard disks due to their limited storage capacity and slower data transfer rates. However, USB thumb drives/pen drives have become increasingly popular due to their portability and convenience.

Answer: byte

Explanation:

The correct answer is (d) byte, which is a group of 8 bits of data. Bytes are commonly used as the basic unit of measurement for computer memory and storage capacity, and are often used to represent a single character of text or a small unit of data. For example, the letter "A" is represented by a single byte of data in many computer systems.

Answer: memory

Explanation:

The contents of (d) memory are lost when the computer turns off. Memory, also known as RAM (Random Access Memory), is a type of volatile memory that is used to temporarily store data and instructions that the computer needs to access quickly. The contents of RAM are lost when the computer is turned off or restarted. This is why it is important to save your work to a secondary storage device, such as a hard disk drive or USB drive, before turning off the computer, in order to ensure that your data is not lost.

Answer: binary

Explanation:

Binary is a number system that uses only two digits, 0 and 1, to represent all numbers and characters. Computers use the binary number system because it is easy to represent the binary digits as on and off states of electronic switches, which is how computers process and store data. Other number systems, such as decimal, octal, and hexadecimal, are used for specific purposes in computing, but binary is the primary number system used by computers.