Computer Workshop (Python Programming) (CY-306) - Important Questions

Explain the difference between a list and a tuple in Python. Give at least two code examples showing creation, indexing, slicing, and an example scenario where a tuple is preferred over a list.

Write a Python function to reverse a list without using the built-in reverse() method or slicing. Show the function and its output for a sample input list.

Write a Python program to find the maximum and minimum elements in a list of integers without using the built-in max() and min() functions. Demonstrate the program with a sample list.

Using list comprehension, create a list of squares of even numbers between 1 and 20. Also show how to produce the same result using an explicit for-loop.

Write a Python program to sort a list of integers using the bubble sort algorithm. Show the code and the output for a sample unsorted list.

Explain the structure of a Python dictionary. Demonstrate with code how to create a dictionary, access values safely, add a new key-value pair, update an existing key, and delete a key.

Write a Python program that reads a list of words and uses a dictionary to compute and display the frequency of each word. Show the program and its output for a sample list of words.

Given a nested data structure such as a list of dictionaries or a dictionary containing lists, write code to access and modify a deeply nested element. Provide a concrete example and show before-and-after states.

Write Python code to convert a list of two-element tuples into a dictionary. Then show code to convert a dictionary back into a list of (key, value) tuples.

Demonstrate three ways to merge two dictionaries in Python and explain how key conflicts are handled in each method. Provide code examples and a sample result where both dictionaries share some keys.