
Databases
Quiz
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Computers
•
University
•
Practice Problem
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Medium
hoài anh
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. What is a primary function of a Database Management System (DBMS)?
a) To design hardware components
b) To define, create, and maintain a database
c) To manage network protocols
d) To compile programming languages
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. In a flat-file system, how is data redundancy typically compared to a DBMS?
a) Lower than in a DBMS
b) Higher than in a DBMS
c) About the same as in a DBMS
d) Completely eliminated
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Which of the following best describes the three levels of database architecture defined by ANSI/SPARC?
a) Physical, Logical, Technical
b) Base, View, Subschema
c) Internal, Conceptual, External
d) User, Admin, System
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Which database model organizes data in a parent-child structure similar to an inverted tree?
a) Relational model
b) Network model
c) Hierarchical model
d) Document modeL
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. How does the relational model organize data?
a) In files with pointers
b) In circular arrays
c) In two-dimensional tables
d) In object hierarchies
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. What is each row in a relational table called?
a) Field
b) Attribute
c) Record
d) Tuple
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. Which SQL operation is used to combine rows from two or more tables based on related columns?
a) Select
b) Join
c) Union
d) Insert
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