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

Database Architect/ Designer DB Administration

Ques:- Broadcast and replicate does the similar work , what?s thediff then

Asked In :- Football Radar,

Right Answer:
Broadcast sends data to all nodes in a network, while replication creates copies of data on multiple nodes for redundancy and availability. The key difference is that broadcasting is for immediate distribution, whereas replication is for maintaining consistent data across systems.

Database Analyst/ Programmer DB Administration

Ques:- What is OLAP grid? Where it is used?

Asked In :- Trigent Software, iOPEX, Mystifly,

Right Answer:
OLAP grid is a data visualization tool used in Online Analytical Processing (OLAP) systems to display multidimensional data in a tabular format. It allows users to analyze data from different perspectives, making it useful for business intelligence, reporting, and decision-making processes.

Database Analyst/ Programmer DB Administration

Ques:- How can we know the time taken for particular report execution?

Asked In :-

Right Answer:
You can know the time taken for a particular report execution by using the database's built-in logging or profiling features, such as SQL Server's `SET STATISTICS TIME ON`, Oracle's `DBMS_MONITOR`, or by measuring the execution time in your application code before and after the report query runs.

Database Architect/ Designer DB Administration

Ques:- Can we create report using more than one database?

Asked In :- semaconnect,

Right Answer:
Yes, we can create a report using more than one database by using techniques such as database links, federated queries, or data integration tools to combine data from multiple sources.

Database Analyst/ Programmer DB Administration

Ques:- How do u reduce warnings

Asked In :- infoblox, mfs africa,

Right Answer:
To reduce warnings in a database, you can:

1. Ensure data types match when inserting or updating records.
2. Use proper indexing to optimize queries and avoid performance warnings.
3. Regularly check and clean up deprecated or unused database objects.
4. Validate data before insertion to prevent constraint violations.
5. Review and optimize SQL queries for efficiency.
6. Set appropriate configurations for the database to minimize warning generation.

Database Architect/ Designer DB Administration

Ques:- Why do you use stored procedures and what is their main functionality in a RDBMS?

Asked In :- availity, encora inc., turnberry solutions, techolution, ecr,

Right Answer:
Stored procedures are used to encapsulate complex SQL queries and business logic in a reusable way. Their main functionalities in a RDBMS include improving performance by reducing network traffic, enhancing security by controlling access to data, ensuring consistency through centralized logic, and simplifying maintenance by allowing changes in one place without affecting application code.

Database Architect/ Designer DB Administration

Ques:- What is data consititency

Asked In :- Invensis Technologies,

Right Answer:
Data consistency refers to the accuracy and reliability of data across a database. It ensures that data remains correct and valid according to defined rules and constraints, especially during transactions, so that all users see the same data at any given time.

Database Architect/ Designer DB Administration

Ques:- What is diff b/w Abstraction and Encapsulation?

Asked In :- cook medical,

Right Answer:
Abstraction is the concept of hiding complex implementation details and showing only the essential features of an object, while encapsulation is the technique of bundling the data (attributes) and methods (functions) that operate on the data into a single unit or class, restricting access to some of the object's components.

Database Architect/ Designer DB Administration

Ques:- How do we connect to the database?

Asked In :- inStem (India), whova,

Right Answer:
To connect to a database, you typically use a connection string that includes the database type, server address, database name, user credentials, and any necessary parameters. In programming, you can use libraries or frameworks specific to the language (like JDBC for Java, psycopg2 for Python, or ADO.NET for C#) to establish the connection using this string.

Database Analyst/ Programmer DB Administration

Ques:- What is subreport? In one report maximum how many subreportwe can insert?

Asked In :- OIP, tsb bank,

Right Answer:
A subreport is a report embedded within another report, allowing for detailed data presentation related to the main report. The maximum number of subreports that can be inserted in a report varies by reporting tool, but commonly it can be up to 10 or more, depending on the specific software used.

Database Architect/ Designer DB Administration

Ques:- How does database implement concurrency and consistency in both distributed and local settings.

Asked In :- MagicPin, Discovery, Inc,

Right Answer:
Databases implement concurrency and consistency through mechanisms like locking, transactions, and isolation levels. In local settings, they use locks (e.g., row-level or table-level) to prevent conflicts during simultaneous access. In distributed settings, they may use distributed locking protocols and consensus algorithms (like Paxos or Raft) to ensure all nodes agree on the state of the data. Additionally, ACID properties (Atomicity, Consistency, Isolation, Durability) are enforced to maintain data integrity across both environments.

Database Analyst/ Programmer DB Administration

Ques:- In one subreport how many subreport we can insert?

Asked In :- Promatics Technologies Pvt Ltd,

Right Answer:
You can insert multiple subreports within a single subreport, but the exact number may depend on the reporting tool being used.

Database Architect/ Designer DB Administration

Ques:- What is the significance of ?mp run? command ?

Asked In :- Mechlin Technologies,

Right Answer:
The `?mp run` command is used in IBM Db2 to execute a multi-partition (MP) query, allowing the database to run queries across multiple partitions in a parallel manner, which can improve performance and efficiency in data processing.

Database Architect/ Designer DB Administration

Ques:- Can we use stored procedure for creating the report?

Asked In :- kensium solutions,

Right Answer:
Yes, stored procedures can be used to create reports by retrieving and formatting data from the database.

Database Architect/ Designer DB Administration

Ques:- Are there any limitations in crystal reports?

Asked In :- suyati technologies,

Right Answer:
Yes, Crystal Reports has limitations such as a maximum report size, performance issues with large datasets, limited support for complex data types, and challenges in handling real-time data. Additionally, it may have restrictions on exporting formats and can be less flexible with certain database connections.

Database Analyst/ Programmer DB Administration

Ques:- How can one find a cycle in the linked list? IF found how to recognize the cycle and delete that cycle?

Asked In :- THDC,

Right Answer:
To find a cycle in a linked list, use Floyd's Tortoise and Hare algorithm. Use two pointers: one moves one step at a time (tortoise) and the other moves two steps at a time (hare). If they meet, a cycle exists.

To recognize the cycle, keep track of the meeting point. To delete the cycle, reset one pointer to the head and move both pointers one step at a time until they meet again; the meeting point will be the start of the cycle. To remove the cycle, find the node just before the start of the cycle and set its next pointer to null.

Database Architect/ Designer DB Administration

Ques:- How do we format field?

Asked In :- taskus philippines,

Right Answer:
To format a field in a database, you typically use the appropriate data type for the field (e.g., VARCHAR, INT, DATE) and apply constraints or functions to ensure the data is stored in the desired format. For example, you can use the `FORMAT()` function in SQL to display numeric values in a specific format or use `TO_CHAR()` for date formatting. Additionally, you can set default values and apply validation rules to enforce the format.

Database Analyst/ Programmer DB Administration

Ques:- How many types of subreport are there?

Asked In :- Grid Logic Software, Skillnet,

Right Answer:
There are two types of subreports: linked subreports and unlinked subreports.

Database Analyst/ Programmer DB Administration

Ques:- Can we stop the database null values?How?

Asked In :-

Right Answer:
Yes, we can stop database null values by defining columns with the "NOT NULL" constraint when creating or altering a table.

Database Analyst/ Programmer DB Administration

Ques:- What is the section expert? Why we use it?

Asked In :- Breakthru Beverage, mso,

Right Answer:
The Section Expert is a feature in Crystal Reports that allows users to customize the properties of report sections, such as visibility, formatting, and suppression. It is used to control how different sections of the report are displayed based on specific conditions or criteria.

The Database Administration (DBA) category on takluu.com is designed for professionals who manage the backbone of an organization’s data infrastructure. DBAs are responsible for the installation, configuration, monitoring, and maintenance of database systems like Oracle, MySQL, SQL Server, PostgreSQL, and more. Their role ensures that databases operate smoothly, securely, and efficiently.

This section covers a broad range of essential DBA topics including backup and recovery strategies, database security, performance tuning, replication, clustering, and disaster recovery planning. You will also learn about SQL query optimization, indexing techniques, user management, and capacity planning. These skills help prevent data loss, minimize downtime, and maintain system integrity under high workloads.

Interviewers often test candidates on real-world scenarios such as troubleshooting slow queries, handling deadlocks, setting up replication, and configuring failover systems. In addition to technical skills, DBAs need to understand compliance requirements and ensure that data privacy standards are met.

Our curated interview questions focus on practical knowledge, enabling you to confidently answer questions related to database architecture, scripting, automation, and monitoring tools. Whether you’re preparing for roles like Junior DBA, Senior DBA, Database Engineer, or Data Architect, this category equips you with the necessary insights and hands-on expertise.

By mastering the concepts and best practices shared in this section, you will be able to ensure reliable database performance, safeguard critical business data, and contribute effectively to your organization’s IT success.

Start your journey with Takluu and become a skilled Database Administrator ready to tackle complex data challenges.

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