Basics of Computer

Q1. Briefly explain Database models.
Q2.   a) Differentiate data and information.

b) Define the following terms.

i. Database
ii. Meta data
iii. Data dictionary

Q3.   (a) Define “relationship” and explain various types of relations with examples and diagrams.

(b) What is attribute Explain its types. 

Q4. What is constraint? Explain Not Null, primary key and unique key constraints.
Q5. Explain following terms.

i. Referential integrity
ii. Anomalies and its types
iii. Strong and weak entity
iv. Composite key

Q6.   a) What is ERD? Explain with the help of example.

b) What do you know by degree of relationship? Explain.

Q7.  a) What clause is used to sort table data in descending order? Explain with example.

b) Differentiate “Commit” and “Roll back” statement.

Q8. Write short note on any two of the following.

a) Simple and complex view
b) Role and privilege
c) Round and truncate function