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  Unit 3: Database concepts and the Structured Query Language  *Introduction to Database Concepts* - A database is a collection of organized data that can be easily accessed, managed, and updated. - Data is a collection of raw facts and figures, whereas information is the processed data that has meaning and value. *Need for Database Management Systems* - To store and manage large amounts of data efficiently - To provide a structured and organized way of storing data - To ensure data accuracy, completeness, and consistency - To provide a secure and controlled access to data - To support multiple users and applications *Types of Databases* - Relational Databases (RDBMS): uses tables to store data - Hierarchical Databases: uses a tree-like structure to store data - Network Databases: uses a graph-like structure to store data - Object-Oriented Databases: uses objects to store data *Database Management System (DBMS)* - A software system that manages and controls access to a database - Provi

Informatics Practices (2024-25)  CLASS XI Code No. 065 Unit 1: Introduction to Computer System  Introduction to computer and computing:  evolution of computing devices, components of a computer system and their interconnections, Input/output devices. Computer Memory: Units of memory, types of memory – primary and secondary, data deletion, its recovery and related security concerns. Software: purpose and types – system and application software, generic and specific purpose software. Unit 2: Introduction to Python Basics of Python programming, execution modes: - interactive and script mode, the structure of a program, indentation, identifiers, keywords, constants, variables, types of operator, precedence of operators, data types, mutable and immutable data types, statements, expression evaluation. comments, input and output statements, data type conversion, debugging. Control Statements: if-else, if-elif-else, while loop, for loop  Lists: list operations - creating, initializing, travers