MARGALLA SCIENCE ACADEMY
CHAPTER 7: DATABASE FUNDAMENTALS
SECTION-A
Q1:- Choose the correct option
1. Which of the following is used to delete an existing record from a database?
a. DDL
b. DML
c. DGL
d. DCL
2. SQL is used for
a. Data definition b. Data manipulation
c. Data control
d. All
3. A database table contains data about a single
a. Attribute
b. Field
c. Record
d. Entity
4. The column of a table correspond to:
a. Table
b. Record
c. Field
d. Cell
5. A table must have
a. Primary key
b. Secondary key c. Composite key d. Sort key
6. How many primary keys can a table have?
a. 1
b. 1 or 2
c. 1 to 5
d. any
7. The logical association among entities is called
a. Relationship b. Attribute
c. Identifier
d. Entity
8. The binary relationship can be
a. One -to-one b. One-to-many
c. Many-to-Many d. Composite
9. Which form of dependencies is removed in 2NF?
a. Functional
b. Transitive
c. Associative
d. Partial
10.In 3NF, a non-key attribute must not depend on a
a. Non-key attribute
b. Key attribute
c. composite key d. Sort key
SECTION-B
Q2:- Give Short answers of following questions
1. Define Schema
2. Write three responsibilities of a database administrator
3. Define field
4. What do you mean by integrity of data
5. What is an attribute domain?
6. What is transitive dependency?
7. Why is necessary to normalize a relational database?
8. How to convert entities into relationship?
9. What is a repeating group?
10.What is relationship? Give an example.