Banking Computers Science NABARD Assistant Manager Online Exam 15-05-2016

  • question_answer
    Descending order of data hierarchy in data management in computing is

    A)  Database-records-files bytes-files-bit

    B)  Database-file-record-ftelds -byte-bit

    C)  Database-record-fields-file- bytes-bit

    D)  Database-fields-file-record- bit-bytes

    E)  Database-file-record-fields-bit-bytes

    Correct Answer: B

    Solution :

    [b] Data is organized in a data storage hierarchy of increasingly complex levels: bits, bytes, fields, records, files, and databases. Data are logically organized into
    Bits (characters) : a bit is the smallest unit of data representation (0 or 1);
    Byte : a unit of digital information that most commonly consists of 8 bits;
    Field : a field consists of a grouping of characters;
    Record : record consists of fields, with each field describing an attribute of the entity;
    File : a group of related records;
    Database : an integrated collection of logically related records or files


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