Top 100 DBMS Interview Questions and Answers

DBMS stands for Database Management System and RDBMS stands for Relational Database Management System.

• DBMS is a software system that allows users to define, create, maintain and control access to databases.

• RDBMS is a type of DBMS that stores data in the form of tables with rows and columns.

• RDBMS uses SQL (Structured Query Language) to manipulate data.

• Examples of popular RDBMS include MySQL, Oracle, and Microsoft SQL Server.

Joins in DBMS are used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the ma...read more

DBMS stands for Database Management System. SQL is a programming language used to manage and manipulate data in DBMS.

• DBMS is a software system that allows users to create, manage, and manipulate databases.

• SQL (Structured Query Language) is a programming language used to communicate with DBMS and perform operations on data.

• DBMS and SQL are used in various industries such as finance, healthcare, and e-commerce.

• Examples of popular DBMS include Oracle, MySQL, and Microsoft SQL Se...read more

Explanation of normalization in DBMS with an example.

• Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• It involves dividing larger tables into smaller ones and establishing relationships between them.

• For example, a customer table can be normalized by creating a separate table for addresses and linking them through a foreign key.

• Normalization helps in efficient data storage, retrieval, and maintenance.

• There are differ...read more

DBMS stands for Database Management System. Joins are used to combine rows from two or more tables based on a related column between them.

• DBMS is a software that manages databases, allowing users to interact with the data stored in them.

• Joins are used in SQL queries to combine data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

Normalization is a process of organizing data in a database to reduce redundancy and dependency.

• Normalization is used to eliminate data redundancy and improve data integrity.

• There are different types of normalization such as 1NF, 2NF, 3NF, BCNF, and 4NF.

• 1NF ensures that each column in a table contains atomic values.

• 2NF eliminates partial dependencies by creating separate tables for related data.

• 3NF eliminates transitive dependencies by creating separate tables for non-key att...read more

DBMS stands for Database Management System and RDBMS stands for Relational Database Management System.

• DBMS is a software system that manages databases and provides an interface between the database and the user.

• RDBMS is a type of DBMS that stores data in the form of tables with relations between them.

• RDBMS uses SQL (Structured Query Language) to manipulate data.

• Examples of RDBMS include MySQL, Oracle, and Microsoft SQL Server.

Joins in DBMS are used to combine rows from two or more tables based on a related column between them.

• Joins help retrieve data from multiple tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization helps in minimizing data redundancy by breaking down large tables into smaller ones.

• It ensures data integrity by reducing the chances of anomalies like insertion, update, and deletion anomalies.

• There are different normal forms like 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules to follow.

• For example, in 1NF, each column should contain atomic valu...read more

RDBMS is a type of DBMS that stores data in a structured format with relationships between tables.

• RDBMS enforces ACID properties for database transactions.

• RDBMS uses SQL for querying and managing data.

• DBMS is a general term for any system that manages databases, while RDBMS is a specific type.

• DBMS may not support relationships between tables like RDBMS does.

DBMS is a software system that manages databases, while RDBMS is a type of DBMS that manages relational databases.

• DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System.

• DBMS can manage any type of database, while RDBMS manages only relational databases.

• DBMS does not enforce any specific data model, while RDBMS enforces the relational data model.

• Examples of DBMS include MongoDB and Cassandra, while examples of RDBMS include MyS...read more

DBMS is a software system that manages databases, while RDBMS is a type of DBMS that stores data in a structured format using tables.

• DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System.

• RDBMS stores data in a structured format using tables with rows and columns, while DBMS may or may not use a structured format.

• RDBMS enforces ACID properties (Atomicity, Consistency, Isolation, Durability) for database transactions, ensuring ...read more

DBMS is a software that manages databases, while RDBMS is a type of DBMS that uses a relational model.

• DBMS stands for Database Management System

• It is a software that allows users to create, manipulate, and manage databases

• RDBMS is a type of DBMS that organizes data into tables with rows and columns

• It enforces the relational model and supports SQL for querying and managing data

• Examples of DBMS: MySQL, Oracle, SQL Server

• Examples of RDBMS: PostgreSQL, SQLite, MySQL

DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System.

• DBMS is a software system that allows users to define, create, maintain and control access to the database.

• RDBMS is a type of DBMS that stores data in a structured format using tables with rows and columns.

• RDBMS uses SQL (Structured Query Language) for querying and managing the database.

• Examples of RDBMS include MySQL, Oracle, SQL Server, and PostgreSQL.

RDBMS is a type of DBMS that stores data in a structured format with relationships between tables.

• RDBMS enforces referential integrity through foreign keys.

• RDBMS supports ACID properties for transactions.

• Examples of RDBMS include Oracle, MySQL, SQL Server.

DBMS is a software that manages databases, while RDBMS is a type of DBMS that follows the relational model.

• DBMS stands for Database Management System, which is a software that manages databases.

• RDBMS stands for Relational Database Management System, which is a type of DBMS that follows the relational model.

• DBMS can handle any type of data, while RDBMS organizes data into tables with predefined relationships.

• DBMS allows for more flexibility in data storage and retrieval, while...read more

RDBMS is a type of DBMS that stores data in a structured format using tables with relationships between them.

• RDBMS enforces referential integrity through foreign keys, while DBMS does not.

• RDBMS supports ACID properties (Atomicity, Consistency, Isolation, Durability) for transactions, while DBMS may not.

• Examples of RDBMS include MySQL, Oracle, SQL Server. Examples of DBMS include Microsoft Access, SQLite.

DBMS is a software system that manages databases, while RDBMS is a type of DBMS that stores data in a structured format using tables.

• DBMS stands for Database Management System, which is a software system that manages databases.

• RDBMS stands for Relational Database Management System, which is a type of DBMS that stores data in a structured format using tables with relationships between them.

• RDBMS uses Structured Query Language (SQL) to manage and manipulate data, while DBMS may...read more

DBMS manages data in files while RDBMS manages data in tables with relations.

• DBMS stands for Database Management System while RDBMS stands for Relational Database Management System.

• DBMS manages data in files while RDBMS manages data in tables with relations.

• DBMS does not support client-server architecture while RDBMS supports client-server architecture.

• DBMS does not enforce any constraints while RDBMS enforces constraints like primary key, foreign key, etc.

• Examples of DBMS ar...read more

DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System. RDBMS is a type of DBMS.

• DBMS is a software system that allows users to define, create, maintain and control access to the database.

• RDBMS is a type of DBMS that stores data in a structured format using tables with rows and columns.

• RDBMS enforces a set of rules called ACID properties to ensure data integrity, while DBMS may not necessarily enforce these rules.

• Examples of DB...read more

DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System.

• DBMS: manages data in a structured format, supports multiple users, and ensures data integrity. Example: MySQL, Oracle Database

• RDBMS: a type of DBMS that stores data in tables with rows and columns, enforces relationships between tables, and supports SQL. Example: PostgreSQL, SQL Server

Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.

• Start with two initial numbers, usually 0 and 1.

• Add the two previous numbers to get the next number in the sequence.

• Repeat this process to generate the Fibonacci series.

DBMS is a software system to manage databases while RDBMS is a type of DBMS that manages data in a relational database.

• DBMS stands for Database Management System while RDBMS stands for Relational Database Management System.

• DBMS can manage any type of database while RDBMS manages data in a tabular form with relations between tables.

• DBMS does not enforce any specific data model while RDBMS enforces the relational data model.

• Examples of DBMS include MongoDB and Cassandra while e...read more

RDBMS is a type of DBMS that stores data in a structured format using tables with relationships, while DBMS is a general term for any system that manages databases.

• RDBMS enforces referential integrity and allows for complex queries using SQL

• DBMS does not necessarily enforce relationships between tables

• Examples of RDBMS include MySQL, Oracle, SQL Server

• Examples of DBMS include MongoDB, Redis

DBMS is a software system that manages databases, while RDBMS is a type of DBMS that stores data in a structured format using tables.

• DBMS stands for Database Management System, which is a software system that manages databases.

• RDBMS stands for Relational Database Management System, which is a type of DBMS that stores data in a structured format using tables with relationships between them.

• RDBMS uses SQL for querying and managing data, while DBMS may or may not support SQL.

• Exa...read more