CBSE UGC NET-JRF: Computer Science MCQs (Practice-Test 1 of 6)

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  1. The name of WordStar's directory is

    1. WS5

    2. WS7

    3. WS4

    4. none of the above

  2. If you use WordStar on a dual-floppy system and start WordStar with drive A as the default you will need to change the logged drive to B when

    1. you put the computer on

    2. you start the program

    3. you change the drive

    4. none of the above

  3. WordStar displays an alphabetical listing of as many files on the logged disk or

    1. it has room for

    2. it has directory specification

    3. it has Opening Menu

    4. none of the above

  4. An entity type may contain the declaration of another entity type, and so on, in order to define

    1. Pascal's record file

    2. hierarchical structure

    3. database

    4. none of the above

  5. Important point concerning the hierarchical model is the physical implementation of the

    1. system

    2. software system

    3. evaluated trees

    4. none of the above

  6. The data model proposed by EF Codd in 1970 is called the

    1. Codd Model

    2. relational data model

    3. network model

    4. none of the above

  7. The basic idea is to consider a database as a collection of time varying tables called

    1. relations

    2. network model

    3. Pascal's structure

    4. none of the above

  8. The relational algebra is a set of operators which can be used to define new relations from

    1. the old ones

    2. existing ones

    3. system

    4. none of the above

  9. Relational algebra can be used to express

    1. relations

    2. system

    3. queries and updates

    4. none of the above

  10. SQL is a relational language which has also been implemented in several

    1. DBMSs

    2. ECA

    3. QUEL

    4. none of the above

  11. Relational algebra is one of the basic concepts for defining

    1. high-level language

    2. relational language

    3. machine language

    4. none of the above

  12. SQL is neither a pure algebraic language nor a

    1. machine language

    2. assembly language

    3. predicative language

    4. none of the above

  13. Codd shows that relational algebra is equivalent to first order

    1. differential equation

    2. predicate calculus

    3. differential calculus

    4. none of the above

  14. In SQL the statement Expand Table can be used at any time

    1. old relation

    2. given relation

    3. combination

    4. none of the above

  15. The tutorial is designed to quickly acquaint you with the basic knowledge of

    1. Computer

    2. WordStar

    3. Software programming

    4. none of the above

  16. To start WordStar on a computer with two floppy disk drives, you need to place a copy of your DOS disk in drive A before

    1. you start programming

    2. you format the disk

    3. you turn the computer on

    4. none of the above

  17. Before you can start WordStar, you need to be in the directory that contains all of the

    1. WordStar programs

    2. computer technology

    3. basic working of WordStar

    4. none of the above

  18. The original WordStar was the very first software program

    1. mention program

    2. mention word processor

    3. mention computing

    4. none of the above

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