Database Programming Important Questions

Database Programming Important Questions for Exam Preparations

Unit 1: Introduction to RDBMS

1. Explain the Oracle database architecture in detail.
2. Explain the different DDL commands used in Oracle.
3. Explain different joins (Inner join, Outer join, Cross join) with examples.
4. What is a subquery? Explain it with an example.
5. Write queries to:
   1. Create two tables (parent and child) with referential integrity
   2. Demonstrate Inner Join, Outer Join (Left, Right, Full), and Cross Join
6. Differentiate between SQL and PL/SQL.
7. Explain SQL*Plus commands with examples (DESCRIBE, LIST, APPEND, CLEAR BUFFER).

Unit 2: PL/SQL

8. Explain the PL/SQL block structure with an example.
9. Explain PL/SQL architecture.
10. Explain the conditional control statements used in PL/SQL.
11. What is a repetitive control statement? Explain different looping statements with examples.
12. Define variables and constants in PL/SQL. Explain how a variable differs from a constant.

Unit 3: PL/SQL Exception

13. What is an exception? Explain exception scope in PL/SQL.
14. Explain how user-defined exceptions can be raised with an example.
15. Explain Advanced Exception concepts: RAISE_APPLICATION_ERROR, EXCEPTION_INIT.

Unit 4: Database Cursors

16. What is a cursor? Explain different types of cursors used in a database.
17. Why is a cursor required? Explain the different steps of an explicit cursor in PL/SQL.
18. Explain the differences between implicit and explicit cursors.
19. Write a program to display the name and salary of an employee using a cursor, explaining the different control steps.
20. Write a short note on parameterized cursors.

Unit 5: Database Triggers

21. What is a trigger? Explain the differences between statement-level and row-level triggers with examples.
22. What is a row-level trigger? Explain BEFORE row triggers and AFTER row triggers with examples.
23. Explain the use of triggers with proper examples.
24. Write a short note on INSTEAD OF triggers.
25. Why do we need triggers in a database?

Unit 6: Records and Procedures

26. What is a record in PL/SQL? Explain different types of records used in PL/SQL.
27. What are records and nested records in PL/SQL? Explain the benefits of using records.
28. Define a stored procedure. Explain different parameter modes used in stored procedures.
29. Differentiate between a stored procedure and a stored function with examples.
30. How can a parameterized stored procedure be used? Explain with an example.
31. Write a stored procedure to count/display the number of records in a table.

Unit 7: Functions and Packages

32. How can functions be created and invoked in a database? Explain with examples.
33. What is a function in PL/SQL? Explain how it differs from a procedure.
34. What are packages? What does a PL/SQL package consist of?
35. Explain the components of a package with an example.
36. Write a short note on packages.
37. Explain package instantiation and initialization.

Note:This list is for reference purposes only to help you prepare smartly and cover all critical areas of Database Programming. Always review your class notes, teacher guidelines, and syllabus coverage.

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