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12th Standard Computer Applications Introduction to Database Management System English Medium Free Online Test 1 Mark Questions with Answer Key 2020

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. The ___________ diagram gives a logical structure of the database graphically?

    (a)

    Entity-Relationship

    (b)

    Entity

    (c)

    Architectural Representation

    (d)

    Database

  2. __________ represents a “tuple” in a relational database?

    (a)

    Table

    (b)

    Row

    (c)

    Column

    (d)

    Object

  3. Which is the MySQL instance responsible for data processing?

    (a)

    MySQL Client

    (b)

    MySQL Server

    (c)

    SQL

    (d)

    Server Daemon Program

  4. DBMS provides to ___________ data

    (a)

    create

    (b)

    retrieve

    (c)

    update

    (d)

    all of the above

  5. ___________ is defined as the system's ability to recover all committed transactions during the failure of storage or the system

    (a)

    Durability

    (b)

    Consistency

    (c)

    Concurrency

    (d)

    All of the above

  6. A _________ is a "copy" of a primary key

    (a)

    Candidate Key

    (b)

    Super Key

    (c)

    Foreign Key

    (d)

    Composite Key

  7. An _________ can be anything a real-world object

    (a)

    Data

    (b)

    Entity

    (c)

    Instance

    (d)

    Relationship

  8. _____________ describes a unique characteristic of an entity

    (a)

    Key Attribute

    (b)

    Simple Attributes

    (c)

    Composite Attributes

    (d)

    Single Valued Attribute

  9. A __________ contains only one value for the attribute and they don't have multiple numbers of values.

    (a)

    Key Attribute

    (b)

    Simple Attributes

    (c)

    Composite Attributes

    (d)

    Single Valued Attribute

  10. A _____ has more than one value for that particular attribute

    (a)

    Multi valued 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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