Practice MCQs

Explanation: Python is a high-level, interpreted programming language known for its readable syntax. It is widely used in data science, AI, web development and automation.

Explanation: SQL (Structured Query Language) is the standard language for managing relational databases. It is used to create, read, update and delete (CRUD) data in databases like MySQL, PostgreSQL and Oracle.

Explanation: A variable is a named storage location in memory that holds a value which can change during program execution. Variables have a name, data type and value.

Explanation: OOP (Object-Oriented Programming) is a paradigm based on "objects" containing data and methods. Key concepts: encapsulation, inheritance, polymorphism and abstraction. Examples: Java, C++, Python.

Explanation: An algorithm is a finite, well-defined sequence of steps or instructions designed to solve a specific problem or perform a computation. All programs are implementations of algorithms.

Explanation: LAN (Local Area Network) is a network that connects computers in a limited area such as a home, office or building. WAN (Wide Area Network) covers a larger geographic area.

Explanation: HTTP (HyperText Transfer Protocol) is the foundation of the World Wide Web, used for transmitting web pages. HTTPS is the secure version using SSL/TLS encryption.

Explanation: A router forwards data packets between computer networks, directing internet traffic. It connects your home network (LAN) to the internet (WAN) and assigns local IP addresses.

Explanation: DNS (Domain Name System) is like the phone book of the internet — it translates human-readable domain names (google.com) into IP addresses (142.250.x.x).

Explanation: IP stands for Internet Protocol — a set of rules governing the format of data sent over the internet. Each device has an IP address for identification and routing.