Competitive Exams: Computers MCQs (Practice_Test 21 of 21)

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  1. The model which provides a concrete expression of these concepts by means of two fundamental ideas. Logical records and links, is called a
    1. relationship model
    2. network model
    3. hicrachical model
    4. none of the above
  2. The network model has been established by
    1. CODASYL committee
    2. IBM
    3. ECA
    4. none of the above
  3. A link may be defined as the representation of an
    1. objects
    2. programs
    3. association
    4. none of the above
  4. DML is intended provide operations which ope-rate upon data stored in the
    1. file
    2. record
    3. database
    4. none of the above
  5. In the hierarchical model a hierarchical schema is defined by a tree whose nodes are
    1. database
    2. logical record types
    3. links
    4. none of the above
  6. The set of all values in the relations represents the contents of the
    1. database
    2. record file
    3. table
    4. none of the above
  7. In hierarchical data model, the database is represented by
    1. a directed graph
    2. tree structures
    3. relation
    4. none of the above
  8. A Database Management System (DBMS) is a software system capable of supporting and managing any number of independent
    1. results
    2. relations
    3. Both
    4. none of the above
  9. Support for data independence is arguably the most important feature of a
    1. system
    2. database system
    3. relation
    4. none of the above
  10. Distinct levels of data independence arc
    1. two
    2. three
    3. four
    4. none of the above
  11. Database software may be divided into
    1. four distinct categories
    2. three distinct categories
    3. two distinct categories
    4. none of the above
  12. Any large software project may be divided into several
    1. project phases
    2. sub projects
    3. hardware
    4. none of the above
  13. Data modeling occupies an important position in the
    1. database file
    2. database life cycle
    3. relation
    4. none of the above
  14. The term “software engineering” implies the application of scientific knowledge and discipline to the construction of
    1. database record
    2. computer hardware system
    3. computer software system
    4. none of the above
  15. Program correctness has been a strong motivation for much of the work in software engineering
    1. high-level language programming
    2. programming language design
    3. Pascal
    4. none of the above