Oracle technical interview questions and answers are crucial for candidates preparing for database-related roles such as Database Developer, SQL Programmer, DBA, or Data Analyst. Oracle is widely used in enterprise applications, so interviewers frequently test a candidate’s concepts in SQL, PL/SQL, joins, indexing, triggers, views, transaction management, and performance tuning. Companies like TCS, Wipro, Infosys, Capgemini, and Cognizant often include Oracle questions in both technical interviews and written tests. This guide covers the most frequently asked Oracle interview questions with clear explanations, practical examples, and beginner-friendly definitions. Whether you are preparing for a campus placement or an experienced-level interview, mastering these Oracle concepts will help you answer confidently. You can also download Oracle interview PDFs and practice company-wise mock tests to enhance your preparation.
Database professionals can deepen their Oracle expertise by studying PL/SQL programming and understanding DBMS concepts thoroughly
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11. What is implicit cursor and how is it used by Oracle ?
An implicit cursor is a cursor which is internally created by Oracle.It is created by Oracle for each individual SQL
12. What is schema?
A schema is collection of database objects of a user.
13. What are the types of Notation in Oracle ?
Position, Named, Mixed and Restrictions.
14. What are Schema Objects?
Schema objects are the logical structures that directly refer to the databases data. Schema objects include tables, views, sequences, synonyms, indexes, clusters, database triggers, procedures, functions packages and database links.
15. Can objects of the same schema reside in different tablespaces?
Yes.
16. Can a tablespace hold objects from different schemes?
Yes.
17. What is Oracle table?
A table is the basic unit of data storage in an Oracle database. The tables of a database hold all of the user accessible data. Table data is stored in rows and columns.
18. What is an Oracle view?
A view is a virtual table. Every view has a query attached to it. (The query is a SELECT statement that identifies the columns and rows of the table(s) the view uses.)
19. What is Partial Backup ?
A Partial Backup is any operating system backup short of a full backup, taken while the database is open or shut down.
20. What is Mirrored on-line Redo Log ?
A mirrored on-line redo log consists of copies of on-line redo log files physically located on separate disks, changes made to one member of the group are made to all members.