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February 13, 2015

NABARD Officers Grade A & Grade B Online Exam Call Letters out


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Friends, the National Bank for Agriculture and Rural Development (NABARD) has released the Preliminary Online Exam Call Letters for the recruitment of Grade A and Grade B Officers 2015. You can download your call letters from the official website of NABARD or from below link by entering your Registration Number and Date of Birth / Password. All the Best :)

Thanks to Kapil Pandey and Balaji Selvaraj for the update 

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  1. IT Notes Part- 3

    Physical level : how the data is stored physically and where it is stored in database.
    Logical level : what data are stored in the database, and what relationships exist among those data
    View level : part of the entire database


    20-FTP data (File Transfer Protocol)
    21-FTP Control(File Transfer Protocol)
    22-SSH (Secure Shell)
    25 -SMTP(Simple Mail Transfer Protocol)
    53-DNS (Domain Name Service)
    68-DHCP (Dynamic Host Configuration Protocol)
    80-HTTP (HyperText Transfer Protocol)
    110-POP3 (Post Office Protocol, version 3)
    115-SFTP (Secure File Transfer Protocol)
    119-NNTP (Network New Transfer Protocol)
    123-NTP (Network Time Protocol)
    137-NBNS (NetBios naming service)
    138-NetBiosDatagram Service
    139-NetBIOS Session service
    143-IMAP (Internet Message Access Protocol)
    161-SNMP (Simple Network Management Protocol)
    194-IRC (Internet Relay Chat)
    220-IMAP3 (Internet Message Access Protocol 3)
    443-SSL (Secure Socket Layer)
    445-SMB (NetBIOS over TCP) Server message block
    993-SIMAP (Secure Internet Message Access Protocol)
    3389-RDP(RemoteDesktop Protocol)

    TRACKS-A ring on a disk where data can be written( concentric circles)
    SECTOR-Each track is divided into sections called sectors. A sector is the smallest physical storage unit on the disk. The data size of a sector is always a power of two
    CYLINDER-consists of the set of tracks that are at the same head position on the disk
    SEEK TIME- the amount of time required for the read/write heads to the cylinder containing desired sector.
    ACCESS TIME-(seek time+latency)
    total time it takes the computer to read data from a storage device such as computer memory....
    ROTATIONAL DELAY/LATENCY-is the time to move the required sector to the disk head


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