Class 12 Computer Science - Class 12 Boards Computer

Class 12 Computer Science: Python, File Handling, DBMS, SQL, Networking, and Stack

Python Functions and Arguments Understanding Python functions and their arguments is essential for programming and output-based questions. Functions are named blocks of code that perform specific tasks and can accept parameters (arguments) to operate on. -...

What is the main advantage of focusing on Python syntax when learning the basics?

It simplifies many concepts and reduces confusion

Which of the following file modes in Python opens a file for writing and overwrites existing content?

W (Write)

What is the main reason for using file handling in Python?

To store program data permanently in secondary memory

Which file mode in Python opens a file for reading and gives an error if the file does not exist?

r

What is a Stack data structure?

A Stack is a linear data structure that follows the Last In, First Out (LIFO) principle. Elements are added (pushed) and removed (popped) only from one end, called the top.

Explain the LIFO principle in the context of a Stack.

LIFO stands for Last In, First Out. This principle dictates that the last element added to the stack is always the first one to be removed. It operates like a pile of plates, where the newest plate is on top and is the first to be taken off.