Answer: Sequential access

Explanation:

Sequential access

Answer: Nonvolatile memory

Explanation:

ROM is an example of nonvolatile memory.

Answer: does not require constant power

Explanation:

A. Secondary storage does not require constant power to retain the stored data, unlike primary storage (e.g. RAM) which requires power to maintain data in memory. Therefore, option (a) is correct.

Answer: file compression

Explanation:

Decreasing the amount of space required to store data and programs is accomplished by file compression. File compression is a technique used to reduce the size of a file by encoding or "compressing" its contents in a more efficient manner. This is often achieved by removing redundancies in the data or by using advanced compression algorithms that can more effectively represent the data using fewer bits. This results in a smaller file size, which can be beneficial when storing or transferring files, especially over limited bandwidth networks. Pressing, disk caching, RAID, and crashing are not techniques used to decrease the amount of space required to store data and programs. Pressing refers to the process of pressing a CD or DVD, disk caching is a method used to improve performance by storing frequently accessed data in memory, RAID is a data storage technology used to improve reliability and performance, and crashing refers to the failure of a computer program or system.

Answer: disk drive

Explanation:

The device that reads the information contained on a disk and transfers it to the computer's memory is the "disk drive". Therefore, the answer is (d) disk drive.

Answer: digital data

Explanation:

Information on a computer is stored as digital data. Digital data is a representation of information using binary digits (bits), which can only have two values: 0 or 1.

Answer: magnetic

Explanation:

Magnetic storage devices use magnetic fields to store and retrieve data. Examples of magnetic storage devices include hard disk drives (HDD), floppy disks, and magnetic tape. Magnetic storage devices are commonly used for storing large amounts of data in computers and other digital devices because they offer high capacity, reliability, and cost-effectiveness. Optical and flash storage devices are also popular, but magnetic storage devices remain the most commonly used type of storage device.

Answer: optical disc

Explanation:

A DVD is an example of a (b) optical disc. An optical disc is a type of storage medium that uses a laser to read and write data. DVDs (Digital Versatile Discs) are a type of optical disc that can store large amounts of data, including movies, music, software, and other files. DVDs are commonly used for distributing commercial movies and other media, as well as for backing up data and storing large files. Other examples of optical discs include CD-ROMs, Blu-ray discs, and HD-DVDs.

Answer: erasing and reconstructing the contents of ROM

Explanation:

EPROM (Erasable Programmable Read-Only Memory) can be used for erasing and reconstructing the contents of ROM (Read-Only Memory). It is a type of memory chip that can be erased and reprogrammed using ultraviolet light.

Answer: Main memory

Explanation:

Programs and data are kept in the main memory (also known as primary memory or RAM) while the processor is using them.