dbi202 Exam Study Guide with Complete
Solutions
DBMS is a collection of .............. that enables user to create and maintain a database. -
Answer-Program
In a relational schema, each tuple is divided into fields called - Answer-Domains
In an ER model, ................ is described in the da...
Which one of the following statements is false? - Answer✔✔-Data elements in the database can
be modified by changing the data dictionary.
Which of the following are the properties of entities? - Answer✔✔-Attributes
Which database level is closest to the users? - Answer✔✔-External
Which are the two ways in which entities can participate in a relationship? - Answer✔✔-Total
and partial
........ data type can store unstructured data - Answer✔✔-RAW
1. State true or false. i) Select operator is not a unary operator. ii) Project operator chooses
subset of attributes or columns of a relation. - Answer✔✔-i-False, ii-True
2. ............... database is used as template for all databases created. - Answer✔✔-Model
3. One aspect that has to be dealt with by the integrity subsystem is to ensure that only valid
values can be assigned to each data items. This is referred to as - Answer✔✔-Domain Integrity
4. ....................... operator is basically a join followed by a project on the attributes of first
relation. - Answer✔✔-Semi-Join
5. Which of the following is not a binary operator in relational algebra? - Answer✔✔-Project
6. Centralizing the integrity checking directly under the DBMS .............. Duplication and ensures
the consistency and validity of the database. - Answer✔✔-Reduces
7. Which of the following is/are the DDL statements? - Answer✔✔-All of the above
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