DBMS - Definition Video Lecture | Crash Course for GATE CSE - Computer Science Engineering (CSE)
FAQs on DBMS - Definition Video Lecture - Crash Course for GATE CSE - Computer Science Engineering (CSE)
| 1. What is a DBMS and why is it important in computer science? |  |
Ans.A Database Management System (DBMS) is software that enables users to create, manage, and manipulate databases. It is important in computer science because it provides a systematic way to store, retrieve, and manipulate data efficiently, ensuring data integrity, security, and multi-user access.
| 2. What are the different types of DBMS? | |
Ans.The different types of DBMS include Hierarchical DBMS, Network DBMS, Relational DBMS, Object-oriented DBMS, and NoSQL DBMS. Each type has its own structure and is used for different applications, depending on the complexity and type of data being managed.
| 3. What are the key components of a DBMS? | |
Ans.The key components of a DBMS include the Database Engine, which handles data storage and retrieval; the Database Schema, which defines the structure of the database; the Query Processor, which interprets and executes database queries; and the User Interface, which allows users to interact with the database.
| 4. What is the difference between SQL and NoSQL databases? | |
Ans.SQL databases are structured and use a predefined schema with tables and relations, supporting complex queries through SQL (Structured Query Language). NoSQL databases, on the other hand, are more flexible, can handle unstructured data, and are designed to scale horizontally, making them suitable for big data applications.
| 5. How do transactions work in a DBMS? | |
Ans.Transactions in a DBMS are sequences of operations performed as a single logical unit of work. They follow the ACID properties (Atomicity, Consistency, Isolation, Durability) to ensure reliability. This means that transactions are completed fully or not at all, the database remains consistent before and after the transaction, operations are isolated from one another, and once a transaction is committed, it is permanent.
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