Oracle Interview Questions and Answers in 2025 (100+ Q&A)

Ques:- What are indexes ? What are the advantages ? (Phone Screen)

Asked In :- Genxlead,

Right Answer:
Indexes are database objects that improve the speed of data retrieval operations on a table. The advantages of using indexes include faster query performance, efficient data access, and improved sorting and filtering capabilities.

Database Analyst/ Programmer Oracle

Ques:- What are the error tables in OM

Asked In :- KTS Infotech, scientific games, vera solutions, balbix,

Right Answer:
The error tables in Oracle Order Management (OM) are typically:

1. **OE_ORDER_ERRORS** - for order-related errors.
2. **OE_LINE_ERRORS** - for line-level errors in orders.
3. **OE_PRICE_ERRORS** - for pricing-related errors.
4. **OE_SHIP_ERRORS** - for shipping-related errors.

These tables store information about issues encountered during order processing.

Database Analyst/ Programmer Oracle

Ques:- What is WITH CHECK OPTION

Asked In :- arup laboratories,

Right Answer:
The `WITH CHECK OPTION` is a clause used in a view definition in Oracle that ensures any data modifications (INSERT or UPDATE) made through the view must satisfy the conditions defined in the view's SELECT statement. If the modification violates these conditions, the operation will be rejected.

Database Analyst/ Programmer Oracle

Ques:- In a Standard form a DFF is disable?How we can Enable it?

Asked In :- aecom, trilogy,

Right Answer:
To enable a Disabled Functionality (DFF) in a standard form, you need to modify the DFF context values or the associated segment's properties in the application setup. This can typically be done through the "Descriptive Flexfields" configuration in the Oracle application setup, where you can set the DFF to be enabled based on specific conditions or user roles.

Database Analyst/ Programmer Oracle

Ques:- What are the differences you find when working with oracle91 and sql server 2005?

Asked In :-

Right Answer:
1. **Database Structure**: Oracle uses a multi-version concurrency control (MVCC) model, while SQL Server uses locking mechanisms for concurrency.

2. **Data Types**: Oracle has data types like VARCHAR2 and NUMBER, whereas SQL Server uses VARCHAR and INT.

3. **PL/SQL vs T-SQL**: Oracle uses PL/SQL for procedural programming, while SQL Server uses T-SQL.

4. **Transaction Control**: Oracle automatically commits transactions unless explicitly told not to, while SQL Server requires explicit transaction control.

5. **Indexing**: Oracle supports bitmap indexes, while SQL Server primarily uses B-tree indexes.

6. **Partitioning**: Oracle offers more advanced partitioning options compared to SQL Server 2005.

7. **Backup and Recovery**: Oracle uses RMAN for backup and recovery, while SQL Server uses SQL Server Management Studio (SSMS) and native backup features.

8. **Licensing**: Oracle typically has a more complex licensing model

Database Analyst/ Programmer Oracle

Ques:- Mention the interface tables for item open interface andopen transaction interface and also their respectiveproduction tables.

Asked In :-

Right Answer:
For the Item Open Interface, the interface table is `ITEM_INTERFACE` and the production table is `MTL_SYSTEM_ITEMS_B`.

For the Open Transaction Interface, the interface table is `TRANSACTION_INTERFACE` and the production table is `MTL_MATERIAL_TRANSACTIONS`.

Database Analyst/ Programmer Oracle

Ques:- Which is the table for storing organization information?

Asked In :- Verticurl Marketing, Suvarna Technosoft, cabot technology solutions inc,

Right Answer:
The table for storing organization information in Oracle is the `ORG_ORGANIZATION_DEFINITIONS` table.

Oracle Project Leader/ Project Manager

Ques:- How can reply if interviewer say thats why you choose B.Tech after passing the exam of Bsc.

Asked In :-

Right Answer:
I chose B.Tech after completing my B.Sc. because I wanted to deepen my technical knowledge and skills in engineering, which aligns with my career goals in the technology field.

Database Analyst/ Programmer Oracle

Ques:- ORA-01508: cannot create database; error in file 'string' atline string

Asked In :- Sycamore Software, pubmatic, stefanini philippines,

Right Answer:
The ORA-01508 error indicates that there is an issue with the specified file, often related to the initialization parameter for the database. Check the file path, ensure the file exists, and verify that you have the necessary permissions to access it.

Database Analyst/ Programmer Oracle

Ques:- I have 2 Databases. How can create a table in particulardatabase? How can i know the list of tables presented eachdatabase?( in oracle 10g)

Asked In :-

Right Answer:
To create a table in a specific database in Oracle 10g, you need to connect to that database using a tool like SQL*Plus or SQL Developer, and then execute the `CREATE TABLE` statement. For example:

```sql
CREATE TABLE your_table_name (
column1 datatype,
column2 datatype,
...
);
```

To list the tables in each database, you can query the `USER_TABLES`, `ALL_TABLES`, or `DBA_TABLES` views. For example:

```sql
SELECT table_name FROM user_tables; -- Lists tables in the current user's schema
```

Make sure you are connected to the correct database when executing these commands.

Database Analyst/ Programmer Oracle

Ques:- What are important reports in HRMS,GL,AP,AR in oracle apps?

Asked In :-

Right Answer:
Important reports in Oracle Apps for HRMS, GL, AP, and AR include:

**HRMS:**
1. Employee List Report
2. Payroll Register Report
3. Absence Management Report
4. HRMS Audit Report

**GL (General Ledger):**
1. Trial Balance Report
2. General Ledger Account Balances Report
3. Financial Statement Report
4. Journal Entry Report

**AP (Accounts Payable):**
1. Accounts Payable Aging Report
2. Invoice Register Report
3. Payment Register Report
4. Supplier Payment History Report

**AR (Accounts Receivable):**
1. Accounts Receivable Aging Report
2. Customer Balance Report
3. Invoice Aging Report
4. Receipt Register Report

Database Analyst/ Programmer Oracle

Ques:- Can Constraints cannot be exported through EXPORT command ?

Asked In :- Siam Computing, Cinif Technologies, mobikasa,

Right Answer:
Yes, constraints cannot be exported through the EXPORT command in Oracle.

Database Analyst/ Programmer Oracle

Ques:- What is the difference between oracle 81,91,11i

Asked In :- Solunus, tricentis,

Right Answer:
Oracle 8i, 9i, and 11i refer to different versions of Oracle's database and applications:

- **Oracle 8i**: Introduced support for Internet applications and multimedia data types.
- **Oracle 9i**: Added features like Real Application Clusters (RAC), enhanced performance, and improved XML support.
- **Oracle 11i**: Primarily refers to the Oracle E-Business Suite, which includes various business applications and was designed for enterprise resource planning (ERP).

Each version brought enhancements in performance, scalability, and features tailored for different business needs.

Database Analyst/ Programmer Oracle

Ques:- How many null values can be inserted in a coulmn whihc is unique constraint

Asked In :- juniper square, powermax,

Right Answer:
A unique constraint allows for one null value in a column.

Database Analyst/ Programmer Oracle

Ques:- How to register a form and stored procedure in oracle apps

Asked In :- Sanmina Corporation, itc infotech,

Right Answer:
To register a form and stored procedure in Oracle Apps, follow these steps:

1. **Register the Form:**
- Use the `FORM` registration in the Oracle Applications Developer responsibility.
- Navigate to `Application > Form > Register`.
- Enter the form details, including the form name, application, and other required fields.
- Save the registration.

2. **Register the Stored Procedure:**
- Use the `PL/SQL` registration in the Oracle Applications Developer responsibility.
- Navigate to `Application > Program > Register`.
- Enter the program details, including the program name, application, and the stored procedure name.
- Save the registration.

3. **Compile the Form and Procedure:**
- Ensure the form is compiled and the stored procedure is valid.

4. **Assign the Form to a Menu:**
- Navigate to `Application > Menu > Define`.
- Add the registered form to the appropriate menu.

5. **Test the Registration

Database Analyst/ Programmer Oracle

Ques:- What are stock locators and how to define them? name thetables where the stock locator information is stored. atleast two.

Asked In :- kinaxis, tiket.com (pt. global tiket network), urjanet,

Right Answer:
Stock locators are identifiers used to specify the exact location of inventory items within a warehouse or storage area. They help in tracking and managing stock efficiently.

To define stock locators, you typically set them up in the inventory management system, specifying details such as the locator name, type, and associated inventory items.

The tables where stock locator information is stored include:
1. `MTL_SYSTEM_ITEMS_B`
2. `MTL_LOCATIONS`

Database Analyst/ Programmer Oracle

Ques:- Which is better Oracle or MS SQL? Why?

Asked In :-

Right Answer:
The choice between Oracle and MS SQL depends on specific use cases and requirements. Oracle is often preferred for large-scale enterprise applications and complex transactions due to its advanced features and scalability. MS SQL is typically favored for its ease of use, integration with Microsoft products, and cost-effectiveness for smaller to medium-sized applications. Ultimately, the "better" option depends on the organization's needs, budget, and existing infrastructure.

Database Analyst/ Programmer Oracle

Ques:- I have procedure p1.and also i declare the same procedure in a package. whice one is efficient package procedure or procedure?

Asked In :- MMF INFOTECH,

Right Answer:
The package procedure is more efficient because it allows for better management of related procedures, reduces redundancy, and can improve performance through shared state and reduced parsing time.

Database Analyst/ Programmer Oracle

Ques:- Can we use toad, winaql in oracle database to access sqlqueries.

Asked In :- NEDA, Relecura, syngenta, global e-softsys,

Right Answer:
Yes, you can use TOAD and WinSQL to access SQL queries in an Oracle database.

Database Analyst/ Programmer Oracle

Ques:- How does accounting occured in Expense Reporting?

Asked In :- zensar technologies,

Right Answer:
Accounting in Expense Reporting occurs by recording expenses incurred by employees in the financial system. Each expense is categorized, validated, and matched against company policies. Once approved, the expenses are posted to the general ledger, affecting the company's financial statements and ensuring accurate tracking of expenditures.

The Oracle section on takluu.com is tailored for professionals and aspirants aiming to excel in Oracle database administration, development, and optimization roles. Oracle remains one of the most widely used enterprise database systems, powering critical applications worldwide.

This category covers comprehensive topics including Oracle Architecture, SQL and PL/SQL programming, database backup and recovery, performance tuning, security management, and Oracle RAC (Real Application Clusters). You’ll also find detailed explanations of core concepts like tablespaces, datafiles, undo management, indexing, and partitioning.

Our content focuses on practical skills essential for roles such as Oracle DBA, PL/SQL Developer, and Database Engineer. We include real interview questions and scenario-based problems designed to test your troubleshooting abilities, SQL proficiency, and understanding of Oracle internals.

Beyond technical topics, we cover best practices for backup strategies, disaster recovery, and security implementation to help you manage Oracle databases efficiently and securely. With mock interview questions, step-by-step guides, and example scripts, this section is a one-stop resource for Oracle exam and job interview preparation.

Whether you’re a fresher or an experienced professional, our structured modules and updated content ensure you stay aligned with current industry standards and Oracle versions.

At Takluu, we focus on turning theoretical knowledge into practical expertise, empowering you to crack your Oracle interview and manage databases confidently from day one.

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