Data Backup and Storage Quiz
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Questions and Answers

What is the main purpose of data backup?

  • To recover data in case of accidental loss (correct)
  • To increase the amount of storage space available
  • To convert data into a different format
  • To enhance the speed of data processing

    • Which type of storage media is not classified as secondary storage?

  • Magnetic tape
  • Portable external hard disk drive
  • Random Access Memory (RAM) (correct)
  • Internal hard disk drive (HDD)

    • What type of access involves reading data in a linear sequence?

  • Random access
  • Sequential access
  • Direct access
  • Serial access (correct)

    • Which of the following is an optical storage medium?

    <p>Blu-ray discs</p> Signup and view all the answers

    Which storage media is typically used for long-term data retention and is not easily altered?

    <p>CD-R</p> Signup and view all the answers

    What is the size of a single character in terms of bytes?

    <p>1 byte</p> Signup and view all the answers

    What is the equivalent of 1 Terabyte in terms of Gigabytes?

    <p>1024 GB</p> Signup and view all the answers

    Which storage media type is primarily associated with data being held magnetically?

    <p>Magnetic Storage Media</p> Signup and view all the answers

    How many bytes are there in a Kilobyte?

    <p>1024 bytes</p> Signup and view all the answers

    What is the power of 2 for a Gigabyte?

    <p>30</p> Signup and view all the answers

    Which of the following is NOT a type of magnetic storage media?

    <p>Solid State Drive</p> Signup and view all the answers

    What is the relationship of a Yottabyte in larger units?

    <p>1024 Zettabytes</p> Signup and view all the answers

    Which of the following describes an Exabyte?

    <p>1024 PB</p> Signup and view all the answers

    What is the primary purpose of backing up data?

    <p>To create a copy in case of data loss or hardware failure</p> Signup and view all the answers

    Which types of access allows data to be retrieved in a specific sequence?

    <p>Serial Access</p> Signup and view all the answers

    What type of media includes SSDs and flash memory cards?

    <p>Solid state storage media</p> Signup and view all the answers

    Which of the following is NOT a reason to back up data?

    <p>To allow for improved internet speed</p> Signup and view all the answers

    Which of the following is a characteristic of direct access?

    <p>Data can be accessed randomly without following a sequence</p> Signup and view all the answers

    Which type of solid state storage is commonly used in memory sticks?

    <p>EEPROM</p> Signup and view all the answers

    What does 'write' refer to in the context of file access?

    <p>Saving data to storage</p> Signup and view all the answers

    What is an example of a secondary storage device?

    <p>Solid State Drive (SSD)</p> Signup and view all the answers

    Which aspect of magnetic tape makes it less favorable for data access?

    <p>It requires sequential access for data retrieval.</p> Signup and view all the answers

    What is a significant advantage of a floppy disk compared to other storage methods?

    <p>Cost-effectiveness.</p> Signup and view all the answers

    Which of the following statements about the internal hard disk drive (HDD) is true?

    <p>They have large memory capacities.</p> Signup and view all the answers

    What is a key disadvantage of a portable hard disk drive?

    <p>It is easy to misplace.</p> Signup and view all the answers

    Which method is used to read data from optical storage media?

    <p>Reflective reading using a laser.</p> Signup and view all the answers

    What is a primary use of CD-ROMs and DVD-ROMs?

    <p>Storing music files and software.</p> Signup and view all the answers

    What storage characteristic makes magnetic tape a suitable option for backup purposes?

    <p>Very large storage capacities.</p> Signup and view all the answers

    What limitation do floppy disks have compared to modern storage options?

    <p>They have very low storage capacity.</p> Signup and view all the answers

    What happens to data written on a CD-ROM?

    <p>It is permanently etched and cannot be changed.</p> Signup and view all the answers

    Which of the following is a disadvantage of using an internal hard disk drive?

    <p>They lack portability.</p> Signup and view all the answers

    Which feature is common to both floppy disks and magnetic tape?

    <p>Very slow data access speed.</p> Signup and view all the answers

    What technology is primarily used to store data on optical discs?

    <p>Laser etching.</p> Signup and view all the answers

    Which characteristic distinguishes portable hard disk drives from internal hard drives?

    <p>They are designed for transportability.</p> Signup and view all the answers

    What is the primary method of data protection used in floppy disks?

    <p>Retractable metal sleeve.</p> Signup and view all the answers

    What is the maximum storage capacity of a CD-R?

    <p>700 MB</p> Signup and view all the answers

    Which of the following is a disadvantage of DVD-RAM?

    <p>Incompatibility with many systems</p> Signup and view all the answers

    What does the 'R' in CD-R signify?

    <p>Recordable once</p> Signup and view all the answers

    Which format allows data to be rewritten multiple times?

    <p>DVD-RW</p> Signup and view all the answers

    Which of the following uses a blue laser for reading data?

    <p>Blu-Ray</p> Signup and view all the answers

    What is a significant advantage of Blu-ray discs compared to DVDs?

    <p>Faster data transfer rates</p> Signup and view all the answers

    Which type of disk can store data that cannot be accidentally erased?

    <p>CD-R</p> Signup and view all the answers

    What is a major disadvantage of CD-Rs and DVD-Rs?

    <p>Data transfer rate is slower</p> Signup and view all the answers

    What capacity can a standard single-layer Blu-ray disc support?

    <p>25 GB</p> Signup and view all the answers

    Which feature of DVD-RAM allows simultaneous reading and writing?

    <p>Discrete concentric tracks</p> Signup and view all the answers

    What happens if an error occurs during the burning of a CD-R?

    <p>The disc is damaged and wasted</p> Signup and view all the answers

    What is a disadvantage of CD-RW compared to CD-R?

    <p>More expensive media</p> Signup and view all the answers

    Which type of memory can be erased by exposure to strong ultraviolet light?

    <p>EPROM</p> Signup and view all the answers

    In what capacity are CD-RWs primarily used?

    <p>Recording radio and television programs</p> Signup and view all the answers

    Study Notes

    Backing Up Data

    • Backing up refers to copying files or data to a different storage medium as a safeguard against problems with the primary storage device.
    • Reasons to back up data include:
      • Preventing data loss due to hardware failure (fires, floods, etc.) or power outages.
      • Protecting against data damage caused by hackers.
      • Avoiding accidental file deletion or overwriting.
      • Safeguarding against virus attacks.

    Types of Access

    • Two main types of file access:
      • Serial Access: Data is accessed sequentially, starting from the beginning and searching through until the desired information is found. For example, magnetic tapes.
      • Direct Access: Data can be accessed directly without needing to read through preceding data. For example, hard disk drives.

    Storage Capacity Units

    • Storage sizes are typically measured in units like KB, MB, GB, and TB.
    • Storage units represent powers of 2. For example, 1 KB is equal to 2^10 bytes.
    • An example of storage capacity: 1 GB is equivalent to approximately 500,000 pages of text.

    Magnetic Storage Media

    • Magnetic storage media uses magnetic properties to store data.
    • The surface of the media is magnetized to hold bits of data, which can be read by a device.
    • Examples include:
      • Magnetic Tape: An old but reliable storage method that uses a thin strip of magnetically coated plastic. It is typically used for backing up large quantities of data.
      • Floppy Disk: An outdated, portable storage device that holds data on a thin plastic disc. It has a low storage capacity and is slow.
      • Fixed/ Internal Hard Disk Drive (HDD): The primary storage device found in computers. It offers fast data access, large storage capacities, and is typically used to store operating systems, software, and files.
      • Portable/ External Hard Disk Drive: Similar to internal HDDs but are connected externally through a USB port. They are used for backup, data transfer, and portable storage due to their design.

    Optical Storage Media

    • Optical storage media employs light sources to read and write data onto discs.
    • Data is stored as "pits" and "lands" on the surface of the disc, which are interpreted as binary data.
    • The process of writing data onto the disc using a laser is called "burning."

    CD/DVD ROM

    • A read-only memory (ROM) format, meaning data cannot be written or erased.
    • Pre-loaded with data during manufacturing.
    • Used for storing music, software, and movies.
    • Maximum storage capacity:
      • CD-ROM: Up to 800 MB
      • DVD-ROM: 4.7 GB

    CD-R/DVD-R

    • "R" stands for recordable, meaning data can be added to the disc once, and then it becomes read-only.
    • Commonly used for recording music and films.
    • Maximum storage capacity:
      • CD-R: 700 MB
      • DVD-R: 4.7 GB

    CD-RW/DVD-RW

    • "RW" stands for re-writable, allowing data to be written, erased, and rewritten multiple times.
    • Used for recording TV programs, CCTV footage, and backing up computer files.
    • Maximum storage capacity:
      • CD-RW: 700 MB
      • DVD-RW: 4.7 GB

    DVD-RAM

    • Offers faster access compared to other DVD types.
    • Allows simultaneous recording and playback of data.
    • Uses a special phase-changing material for writing and erasing.
    • Maximum storage capacity:
      • 4.7 GB
      • 9.4 GB (Dual side)

    Blu-Ray Discs

    • Employs a blue laser for faster data transfer and access.
    • Offers significantly larger storage capacity compared to standard DVDs.
    • Used in home video consoles, for storing and playing movies, and as a storage medium for PCs and camcorders.
    • Storage capacities:
      • 25 GB
      • 50 GB
      • 100 GB

    Solid State Storage Media/ Flash Storage

    • A type of non-volatile memory that stores data electronically, without moving parts.
    • Offers faster data access and greater durability than magnetic storage.
    • Examples include:
      • Solid State Drive (SSD): A replacement for traditional hard disk drives in computers. Offers significantly faster data access and is more durable.
      • Memory Sticks/ Pen Drives: Small, portable storage devices connected via USB. Used for data transfer and storage.
      • Flash Memory Cards: Compact storage cards used in digital cameras, smartphones, and other devices.

    Flash Memory Types

    • Different types of flash memory:
      • ROM (Read Only Memory): Non-volatile memory that cannot be reprogrammed after manufacturing.
      • PROM (Programmable Read-Only Memory): Can be programmed once.
      • EPROM (Erasable Programmable Read-Only Memory): Can be erased by exposure to ultraviolet light.
      • EEPROM (Electrically Erasable Programmable Read-Only Memory): Can be erased and reprogrammed electronically.

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    Description

    Test your knowledge on data backup strategies, types of access, and storage capacity units. This quiz will cover the importance of backing up data and the differences between serial and direct access methods. Ensure you grasp the concepts of data safety and management in computing.

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