computer memory and storage poster

    SEBA

    COMPUTER MEMORY AND STORAGE

    CLASS - 9



    A. Write True or False

    1. One Gigabyte is equal to 1024 megabytes. TRUE

    2. RAM is computer’s long-term memory. TRUE

    3. External memory is of two types. TRUE

    4. Floppy drives are used to access magnetic tapes. FALSE

    5. Online storage can be used to backup important information on the web. TRUE

    6. BIT is a measurement of memory in computer. FALSE

    7. Web server is example of network storage device. TRUE

    8. A tertiary storage device is used to store information for review purpose. TRUE

    B. Fill in the blanks:

    1. The memory of a computer is measured in terms of Bytes

    2. The entire RAM is divided into small units called. Memory Unit

    3. External memory is also called Storage

    4. EPROM a is a ROM that can be erased and reprogrammed many times.

    5. BD a can be accessed through special Blu-ray drives.

    6. A USB Flash Drive is also called a Pen drive or Portable storage device

    7. Online data storage is also known as Internet data storage.

    8. External memory can be secondary or tertiary.

    10. The instruction in RAM is also called firmware.

    11. The entire RAM is divided in the form of Memory chips that can be attached to the motherboard of the computer.

    C. Explain in brief:

    1. Buffer: Buffer is a section of computer memory where data is stored before it being used.

    The monitor also has buffer. Whenever the processor executes an instruction that moves it from the buffer to the computer’s memory

    2. Unit of Memory: The unit of a Computer Memory is measured in term of bytes.

    Bytes are typically a sequence of 8 bits put together to create a single Computer Alphabets or Numerical characters.

    Each bit denotes one binary digit 0 or 1.

    Computer memories vary in sizes from Kilobytes (KB) to Petabytes (PB)

    DVD: Stands for "Digital Versatile Disc." A DVD is a type of optical media used for storing digital data. It is the same size as a CD, but has a larger storage capacity. It is the next generation of optical disk storage technology. DVD recorder can write data on to DVDs and CDs as well as read DVD ROMs and CD ROMs.

    Magnetic Tapes or Cassettes: Magnetic taps is a long and narrow strip of plastic Cotted with magnetic material on which data can be recorded using magnetic signal. Devices that record and playback audio and video using magnetic tape are generally called tape recorders and videotape recorders. A device that stores computer data on magnetic tape can be called a tape drive, a tape unit, or a streamer.

    Network storage device: Network storage is a term used to describe a device, or many grouped devices, that a network uses store copies of data across high-speed local area network (LAN) connections. A storage system is essential because it backs up critical files and other data to a central location. Users can then easily access these files.

    D. Answer the following:

    1. Name the two types of memory in computer.

    The two types of memory in computer are Internal and External memory.

    2. What is the different between RAM and ROM?

    The different between RAM and ROM are given below.

     

    RAM

    ROM

    RAM stand for Random Access Memory

    ROM stand for Read only Memory

    RAM data is volatile. Data is present till power supply is present.

    ROM data is permanent. Data remain even after power supply is not present

    RAM is used to store data that CPU need for current instruction processing.

    ROM is used to store data that in needed to bootstrap the computer.

    RAM speed is quite high

    ROM speed is slower than RAM.

    RAM memory is large and high capacity

    ROM is generally small and of low capacity

    .RAM data can read, erased or modified

    ROM data is read only.

    3. Name some common types of RAM.

    Some common types of RAM are:

    i) SRAM: Static RAM

    ii) DRAM: Dynamic RAM

    iii) SDRAM: Synchronous Dynamic RAM

    iv) DDR RAM: Double Data Rate Synchronous Dynamic RAM

    v) GDDR RAM: Graphics Double Data Rate RAM

    4. What do you understand by EEPROM

    EEPROM (electrically erasable programmable read-only memory) is user-modifiable read-only memory that can be erased and reprogrammed repeatedly through the application of higher-than-normal electrical voltage. You required special software and hardware to change the contents of EEPROM.

    5. What is the role of Cache?

    Cache is a high-speed, High-performance memory to which read and write operation can be done faster than RAM. Its role is to make the programs and data available to the CPU very fast. Also, it act as a buffer between the CPU and the primary memory.

    OR

    This is a very special type of high-speed memory. This memory cannot be accessed by the user. The main function of this cache memory is to make the programs and data available to the CPU very fast.

    6. Explain Secondary Storage Devices with few examples.

    Some Secondary storage devices are given below:

    i) Hard Disk: hard disk, also called hard disk drive or hard drive, magnetic storage medium for a computer. A hard disk drive (HDD) is a non-volatile computer storage device containing magnetic disks or platters rotating at high speeds.

    ii) SSD: A solid-state drive (SSD) is a new generation of storage device that uses solid-state memory to store persistent data. SSD supports reading and writing data and maintains stored data in a permanent state even without power.

    iii) USB Flash Drive: A USB flash drive or a pen drive is a portable storage device easily used to transfer audio, video and data files from one computer to another. In order to use a Flash drive or a Pen drive, a computer must have a Universal Serial Bus (USB) interface or ports.

     

    iv) CD: A compact disc is a portable storage medium that can be used to record, store and play back audio, video and other data in digital form. A CD Drive is required to read information from a CD.

     

    v) DVD: Stands for "Digital Versatile Disc." A DVD is a type of optical media used for storing digital data. It is the same size as a CD, but has a larger storage capacity. It is the next generation of optical disk storage technology. DVD recorder can write data on to DVDs and CDs as well as read DVD ROMs and CD ROMs.

    7. What are Network Storage Devices?

    Network storage is a term used to describe a device, or many grouped devices, that a network uses store copies of data across high-speed local area network (LAN) connections. A storage system is essential because it backs up critical files and other data to a central location. Users can then easily access these files.

    Network storage is a great solution, providing a reliable, external data repository that all the users on the network can access and share. Network storage systems free up local storage space and usually support automated backup programs to prevent critical data loss.

    Note: In a network storage system, it's important to note that devices not connected to the network can't access the data. If the network is down, connected users won't be able to reach their files.

    8. Explain Online Storage.

    Online storage also known as Internet data storage, is a virtual storage approach that allows users to use the Internet to store recorded data in a remote network. This data storage method may be either a cloud service component or used with other options not requiring on-site data backup.

    Online storage is a viable option for data backup: it provides both security and convenience to the end user. There are many benefits to online data storage, including cost, data integrity, automation, syncing, and security.

    3. Name some common types of memory in computer.

    Some common types of ROM are:

    i) PROM: Programmable ROM

    ii) EPROM: Erasable Programmable ROM

    iii) EEPROM: Electrically Erasable Programmable ROM

    iv) MROM: Masked ROM


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