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12th Standard Computer Applications Introduction to Database Management System English Medium Free Online Test One Mark Questions 2020 - 2021

12th Standard

    Reg.No. :
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Computer Applications

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. Which language is used to request information from a Database?

    (a)

    Relational

    (b)

    Structural

    (c)

    Query

    (d)

    Compiler

  2. An entity set that does not have enough attributes to form primary key is known as

    (a)

    Strong entity set

    (b)

    Weak entity set

    (c)

    Identity set

    (d)

    Owner set

  3. Communication is established with MySQL using

    (a)

    SQL

    (b)

    Network calls

    (c)

    Java

    (d)

    API’s

  4. The structure representing the organizational view of entire database is known as __________ in MySQL database.

    (a)

    Schema

    (b)

    Schema

    (c)

    Instance

    (d)

    Table

  5. Which of the following is a not a database? 

    (a)

    Oracle

    (b)

    PostgreSQL

    (c)

    SQLite

    (d)

    None of these

  6. Which of the following is a commercial relational models in  use

    (a)

    Oracle

    (b)

    DB2

    (c)

    PostgreSQL

    (d)

    Both a and b

  7. A key With more than one attribute to identify rows uniquely in a table is called ___________

    (a)

    Candidate Key

    (b)

    Super Key

    (c)

    Foreign Key

    (d)

    Composite Key

  8. _________ are the values for the entity

    (a)

    Data

    (b)

    Entity

    (c)

    Instance

    (d)

    Relationship

  9. ___________ can be subdivided into simple attributes without change in the meaning of that attribute

    (a)

    Key Attribute

    (b)

    Simple Attributes

    (c)

    Composite Attributes

    (d)

    Single Valued Attribute

  10. The ________ cannot be separated it will be haVing a single value for their entity.

    (a)

    Key Attribute

    (b)

    Simple Attributes

    (c)

    Composite Attributes

    (d)

    Single Valued Attribute

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TN 12th Standard Computer Applications free Online practice tests

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