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DBI 202 Board Exam |Questions with 100% Correct Answers
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DBI 202 Board Exam |Questions with 100% Correct Answers
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DBI 202 Board Exam |Questions with100% Correct Answers
A class in UML is similar to___
[A]A Relationship in E/R model
[B]An attribute in E/R model
[C]An entity set in E/R model
[D]None of the others - ✔ ✔ C
Given relations Movies(title, year, length, genre. studioName. producer#). MovieExec(name.
address. cert#). and Studio(name. address. presC#). Suppose we have the materialized
view that
finds the name -
ofthe producer of a given movie as follows:
CREATE MATERIALIZED VIEW MovieProd AS
SELECT title, year, name
FROM Movies. MovieExec
WHERE producer# - cert#
Which of the following modification will affect the MovieProd materialized view?
,[A]Insert a new tuple into Studio
[B]Delete a tuple from Studio
[C]Insert a new tuple into Movies or delete a tuple from
Movies [D]None of the others - ✔ ✔ C
In relational data model, an attribute is a
column [A]True
[B]False - ✔ ✔ a
A data model is a notation for describing data or information. And the description generally
consist of:
[A]2 parts
[B]3 parts
[C]4 parts
[D]5 parts - ✔ ✔ B
DBMS stands for what?
[A]Database Managing Systems
[B]Database Management System
[C]Database Manage System
[D]Database Managable System - ✔ ✔ B
Look at this line:
MOVIES (Id, Name, Description)
What the above represent?
[A]A relation
[B]A schema
,[C]A schema instance
[D]A relation instance - ✔ ✔ B
Look at the following data for table R:
ABC
112
112
113
Choose all correct answers
[A]R is not a relation
[B]R is a relation
[C]R has no key
[D] - ✔ ✔ B,D
Choose all correct statements:
[A] Relation instance is current set of rows for a relation
schema [B]Relation instance is current list of rows for a relation
schema [C]Column headers = attributes.
[D] Relational Data Model is a model that match the way we think about our data - ✔ ✔ A,D
Choose 3 important data models that we will study in database course
[A]Flat File System
[B]Network Data Model
[C]Hierachical Data Model
[D]Relational Data Model
[E]Object - Relational Data Model
[F]Object Oriented Data Model - ✔ ✔ b,c,d
, In relational data model, a tuple is a record or a
row [A]True
[B]False - ✔ ✔ A
When the Relational Data Model first proposed?
[A]1940
[B]1950
[C]1960
[D]1970 - ✔ ✔ D
What is the oldest data model?
[A]Network Data Model
[B]Flat File Data Model
[C]Relational Data Model
[D]Hierachical Data Model - ✔ ✔ A
How many data models mentioned in our database course?
[A]3
[B]4
[C]5
[D]6 - ✔ ✔ D
XML files are semi-structured data
[A]True
[B]False - ✔ ✔ A
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