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
Showing 10 of 113 questions
91. What is Object Auditing ?
Object auditing is the auditing of accesses to specific schema objects without regard to user.
92. What is Auditing ?
Monitoring of user access to aid in the investigation of database use.
93. What is a snapshot?
Where are my TEMPFILES, I dont see them in V$DATAFILE or DBA_DATA_FILE? (for DBA )
Tempfiles, unlike normal datafiles, are not listed in v$datafile or dba_data_files. Instead query v$tempfile or
dba_temp_files:
SELECT * FROM v$tempfile;
SELECT * FROM dba_temp_files;
94. How do I find used/free space in a TEMPORARY tablespace? (for DBA )
Unlike normal tablespaces, true temporary tablespace information is not listed in DBA_FREE_SPACE. Instead use the V$TEMP_SPACE_HEADER view:SELECT tablespace_name, SUM (bytes used), SUM (bytes free)
FROM V$temp_space_header
GROUP BY tablespace_name;
95. What is a profile ?
Each database user is assigned a Profile that specifies limitations on various system resources available to the user.
96. How will you enforce security using stored procedures?
Dont grant user access directly to tables within the application. Instead grant the ability to access the procedures that access the tables. When procedure executed it will execute the privilege of procedures owner. Users cannot access tables except via the procedure.
97. What is a sequence?
How does one get the view definition of fixed views/tables?
Query v$fixed_view_definition. Example: SELECT * FROM v$fixed_view_definition WHERE view_name=V$SESSION;
98. What are the dictionary tables used to monitor a database spaces ?
DBA_FREE_SPACE
DBA_SEGMENTS
DBA_DATA_FILES.
99. How can we specify the Archived log file name format and destination?
By setting the following values in init.ora file. LOG_ARCHIVE_FORMAT = arch %S/s/T/tarc (%S - Log sequence number and is zero
left paded, %s - Log sequence number not padded. %T - Thread number lef-zero-paded and %t - Thread number not padded). The file name created is arch 0001 are if %S is used. LOG_ARCHIVE_DEST = path.
100. What is user Account in Oracle database?
An user account is not a physical structure in Database but it is having important relationship to the objects in the database and will be having certain privileges.