Computer Exam Si99 Done By Chemical Engineering Committee

Zip disks have a storage capacity of either 100 MB or 250 MB.

Flat, portable pieces of Mylar encased in a hard, plastic cover and used to store data are called diskettes. Diskettes were a popular form of removable storage media in the past, commonly used to store and transfer data between computers. They were made up of a flexible magnetic disk that was protected by a plastic cover. Diskettes were portable and could be easily inserted into disk drives for reading and writing data. However, with the advancement of technology, diskettes have become obsolete and have been replaced by more modern storage devices such as USB drives and cloud storage.

The term "2HD" on a disk label refers to the disk being two-sided and high density. This means that the disk has data storage capacity on both sides and is capable of storing a larger amount of data compared to lower density disks. It does not refer to the storage capacity of the disk or being a hard disk.

Thick, rigid, metal platters that are capable of storing and retrieving information at a high rate of speed are known as hard disks. Hard disks are the primary storage device in most computers and are used to store large amounts of data. They are made up of multiple platters that spin at a high speed, allowing for fast access to the stored information. Unlike soft disks or cartridges, hard disks are not flexible and provide a higher level of durability and reliability.

WinZip and PKZip are well-known special compression programs that scan files for ways to reduce the required storage. These programs use different algorithms to compress files, making them smaller in size and thus reducing the amount of storage space required. They are widely used for compressing and decompressing files, making it easier to store and transfer large amounts of data. Sony and Panasonic Compression, as well as Iomega JAZ and SyQuest SPARQ, are not specifically known for their file compression capabilities.

Access time refers to the duration between a computer's request for data and the completion of the transfer of that data. It includes all the necessary steps involved in retrieving the data, such as seeking the data on the storage device, selecting the data, and transferring it to the computer's memory. Therefore, access time is the correct term to describe this process. Seek time and selection time are specific components of access time, representing the time taken to locate the data on the storage device and the time taken to select the data, respectively.

Flexible disks with an exterior jacket of hard plastic currently have a standard size of 3.5 inches. This size is commonly used for floppy disks, which were widely used for data storage in the past. The 3.5-inch size became popular due to its smaller form factor compared to the larger 5.25-inch disks, making it more convenient and portable. Additionally, the 3.5-inch disks had a higher storage capacity and were more durable, leading to their widespread adoption in various computer systems.

Virtual disk space is not a way of improving hard disk performance because it refers to the creation of a virtual disk within the existing hard disk, which can consume additional resources and slow down the system. On the other hand, disk caching and file compression are techniques that can enhance hard disk performance. Disk caching involves storing frequently accessed data in a cache memory to reduce the time it takes to retrieve information from the disk. File compression reduces the size of files, allowing more data to be stored on the disk and improving overall disk performance.

HiFD disks have a storage capacity of 200 MB. This means that these disks can hold up to 200 megabytes of data.

A typical DVD has a storage capacity of 4.7 GB. This is because DVDs use a different type of storage technology compared to CDs, allowing them to store much more data. The larger storage capacity of DVDs makes them ideal for storing movies, software, and other large files.

A DVD device can store as much as two hours of high quality sound and video. This is because DVDs have a larger storage capacity compared to CD-ROMs and floppy disks, allowing them to hold more data. DVDs are commonly used for storing movies and other multimedia content due to their ability to store large amounts of high quality audio and video data.

The correct answer is "compact disk." This is because compact disks, also known as CDs, are the most widely used optical disks and are standard on most PCs. CDs are a popular medium for storing and playing audio, video, and data files. They are portable, durable, and have a large storage capacity, making them a preferred choice for various applications.

A removable floppy-disk cartridge with 100 MB or 250 MB of capacity is called a Zip disk.

A head crash refers to the situation when the read-write head of a hard disk comes into contact with the surface of the disk platter. This can lead to damage on both the head and the platter, potentially causing data loss or corruption.

The correct answer is "hard disk pack". A hard disk pack refers to several hard disk platters that are aligned one above the other and are frequently found external to the system unit. This term is commonly used to describe a storage device that consists of multiple disk platters enclosed in a protective casing. It is often used in large computer systems or mainframes to provide high-capacity storage.

The standard 3.5-inch disk has a storage capacity of 1.44 MB. This means that it can hold up to 1.44 megabytes of data.

A CD-RW disk can be erased and rewritten, unlike other forms of optical disks that can only be written once. This allows for flexibility and the ability to reuse the disk multiple times. Additionally, the question does not provide any information about the access speed of a CD-RW disk compared to an internal disk, so it cannot be determined whether a CD-RW disk has faster access.

Secondary storage is referred to as nonvolatile because it retains its data even when the power is turned off. This is in contrast to volatile storage, such as RAM, which loses its data when the power is disconnected. Nonvolatile storage, such as hard disk drives or solid-state drives, is commonly used for long-term data storage as it allows for data to be stored and retrieved even after power interruptions or system shutdowns.

Floppy disks have rings or tracks that are divided into wedged-shaped sections known as sectors. Sectors are the smallest addressable units on a floppy disk and are used to store data. Each sector contains a fixed amount of data, typically 512 bytes. The division of the disk into sectors allows for efficient organization and retrieval of data. Therefore, the correct answer is sectors.

A CD-R disk can be written to only once because it is a recordable disk that allows data to be permanently written onto it. Once the data is written, it cannot be erased or rewritten. This is different from a CD-RW disk, which can be erased and rewritten multiple times. Therefore, the correct answer is that a CD-R disk can be written to only once.

CDs typically have a storage capacity of 650 MB on one side. This is a common storage capacity for CDs and is often used for storing audio, video, or data files.

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Disk caching is the process of storing frequently used data from a disk into memory. This helps to improve the performance of the system by reducing the time it takes to access the data. When data is accessed from the disk, it is first stored in the cache memory so that subsequent requests for the same data can be served faster. This technique is commonly used in computer systems to optimize disk read operations and provide faster access to frequently accessed data.

File compression is a method used to reduce the size of data and programs, thereby increasing the amount of space required to store them. This is achieved by using various algorithms and techniques to eliminate redundant or unnecessary information from the files. By compressing files, the amount of storage space needed is reduced, allowing for more data and programs to be stored within the available storage capacity.

A group of external disk units connected to a microcomputer to provide additional storage are called hard disk packs.

The given answer, "internal hard disk," is correct because it accurately describes the situation where metallic platters are sealed inside a container and mounted inside the system unit. An internal hard disk is a permanent storage device that is installed inside a computer system, typically connected to the motherboard. It consists of multiple metallic platters that store data magnetically and is a crucial component for storing and retrieving data on a computer system.

The data on a floppy disk is recorded in rings called tracks. Each track is a concentric circle on the disk surface where the data is stored. The tracks are divided into smaller sections called sectors, which contain the actual data. Therefore, the correct answer is "tracks" as they represent the rings on which the data is recorded.

The DVD-ROM has had the major impact on the video market because it is the most widely used and compatible format. DVD-ROMs can be played on most DVD players and computer DVD drives, making them accessible to a larger audience. Additionally, DVD-ROMs are used for commercial movie releases, which have contributed to their widespread adoption and influence on the video market.

DVD stands for digital versatile disk. This is a type of optical disc storage media that can be used for various purposes, such as storing and playing back digital video data. The term "versatile" refers to its ability to be used for multiple purposes, including data storage, video playback, and audio recording. The correct answer is digital versatile disk.

A hard disk cartridge refers to a removable hard disk that can be taken out from the system unit. This allows for easy transportation and storage of data.

A CD-R stands for CD-recordable because it is a type of compact disc that can be written to once using a CD burner. Once the data is written onto the CD-R, it cannot be erased or rewritten. This distinguishes it from a CD-rewriteable, which can be written to multiple times, and a CD-reader, which is used to read the data on a CD.

Disk caching, RAID, and file compression are three ways to improve the performance of a hard disk. Disk caching involves storing frequently accessed data in a cache memory, which allows for faster retrieval of that data. RAID (Redundant Array of Independent Disks) improves performance by distributing data across multiple disks, increasing read and write speeds. File compression reduces the size of files, allowing for more efficient storage and faster data transfer. By combining these three techniques, the performance of a hard disk can be significantly enhanced.

The data on an optical disk are represented by bumpy areas called pits on the disk surface.

Dataplay is a newer write-once format that is about the size of a quarter and has a capacity of 5090 MB. DVD-R is a different format that is larger in size and typically has a larger capacity. CD-RAM is also a different format that is not as commonly used and does not have the same capacity as Dataplay. Therefore, the correct answer is Dataplay.

The data on an optical disk are represented by flat areas called "lands" on the disk surface.

If the notch on a diskette is closed, it is most likely referring to the SuperDisk. The SuperDisk was a type of diskette that had a sliding metal cover over the notch. When the cover was closed, it protected the diskette from being written on or erased. This feature was unique to the SuperDisk and was not present in other types of diskettes such as ZIP disks or HDF.

The wedge-shaped areas on a diskette are called sectors. Sectors are the smallest unit of storage on a disk and are used to organize and store data. Each sector contains a fixed amount of data and is separated by gaps called inter-sector gaps. The term "tracks" refers to concentric circles on the disk where the sectors are located, while "cartridges" are removable storage devices often used with game consoles or older computer systems.

The correct answer is "digital versatile disk" because it is an emerging disk technology that offers disks about the same size as CDs but with faster access and much greater storage capacity. This technology is commonly known as DVD and is widely used for storing and playing back multimedia content, such as movies and music.

Optical disks are having the greatest impact on storage while only in their infancy. Optical disks, such as CDs, DVDs, and Blu-ray discs, have a much higher storage capacity compared to other types of disks like Zip disks or high-density disks. Optical disks can store large amounts of data, making them ideal for various applications such as storing multimedia files, software, and backups. Additionally, optical disks are portable, durable, and compatible with a wide range of devices, making them a popular choice for data storage.

HiFD (High-Capacity Floppy Disk) has the largest capacity among the given options. While 2HD and SuperDisk are also types of removable floppy disks, HiFD offers a higher storage capacity.