uploading dictionary assignment

Author: enrituraj

Dictionary/Assignment/Questions.md

@@ -0,0 +1,139 @@
+
+### **Access, Change, Add, and Remove Items**
+
+1. **Employee Database**: You have an employee database stored in a dictionary where employee IDs are the keys and their names are the values. Write a Python program to:
+   - Access and print the name of an employee by their ID.
+   - Update the name of an employee by their ID.
+   - Add a new employee to the dictionary.
+   - Remove an employee from the dictionary after they leave the company.
+
+2. **Shopping Cart**: You are building a shopping cart system where items and their prices are stored in a dictionary. Write a program to:
+   - Access and print the price of a specific item.
+   - Add a new item to the shopping cart with its price.
+   - Update the price of an existing item.
+   - Remove an item from the shopping cart once the user removes it.
+
+3. **Online Courses**: You manage a dictionary where course names are the keys and the number of enrolled students is the value. Write a Python program to:
+   - Access the number of students enrolled in a specific course.
+   - Add a new course and its student count.
+   - Update the number of students for a specific course.
+   - Remove a course that has been discontinued.
+
+4. **Bookstore Inventory**: You are maintaining a bookstore inventory where each book title is a key, and its quantity in stock is the value. Write a Python program to:
+   - Access the quantity of a specific book.
+   - Add a new book to the inventory.
+   - Update the stock quantity for an existing book.
+   - Remove a book once it is out of stock.
+
+5. **Voting System**: You are managing a voting system where candidates’ names are the keys, and the number of votes they’ve received is the value. Write a Python program to:
+   - Access the current votes for a specific candidate.
+   - Add a new candidate to the voting system.
+   - Update the votes for a candidate when they receive more.
+   - Remove a candidate from the system if they drop out of the race.
+
+---
+
+### **Looping Over Dictionaries**
+
+6. **Student Marks**: You have a dictionary where student names are the keys, and their marks are the values. Write a Python program to loop through the dictionary and:
+   - Print each student's name and their marks.
+   - Calculate and print the average marks of all students.
+
+7. **City Temperatures**: You are tracking the temperatures of various cities using a dictionary where the city name is the key and the temperature is the value. Write a Python program to:
+   - Print each city’s name and its temperature.
+   - Loop through the dictionary to find the city with the highest temperature.
+
+8. **Company Salaries**: You have a dictionary that stores employee names as keys and their salaries as values. Write a Python program to:
+   - Print each employee’s name and salary.
+   - Calculate the total payroll (sum of all salaries).
+   - Find and print the employee with the highest salary.
+
+9. **Library Books**: A library tracks the number of times each book has been borrowed in a dictionary. Write a Python program to:
+   - Print each book title and the number of times it has been borrowed.
+   - Loop through the dictionary to find the book that has been borrowed the most.
+
+10. **E-Commerce Sales**: You are maintaining a dictionary where product names are keys, and the number of units sold is the value. Write a Python program to:
+    - Print each product and its sales count.
+    - Calculate and print the total number of units sold for all products.
+
+---
+
+### **Copying Dictionaries**
+
+11. **School Subjects**: You have a dictionary where subjects are the keys, and the number of students enrolled in each subject is the value. Write a program to:
+    - Create a copy of the dictionary.
+    - Make changes to the original dictionary (e.g., add students to a subject).
+    - Demonstrate that changes in the original do not affect the copied version.
+
+12. **Car Inventory**: A car dealership has an inventory stored in a dictionary where car models are the keys, and the number of available units is the value. Write a program to:
+    - Create a copy of the inventory.
+    - Add new models to the original inventory.
+    - Print both the original and copied inventories to show that they are independent.
+
+13. **Financial Data**: You maintain a dictionary of monthly expenses where months are the keys, and the amount spent is the value. Write a program to:
+    - Copy the dictionary.
+    - Modify the original dictionary (e.g., add new expenses for the current month).
+    - Verify that the copied dictionary remains unchanged.
+
+14. **Movie Ratings**: You have a dictionary where movie names are the keys, and user ratings are the values. Write a Python program to:
+    - Create a copy of the dictionary.
+    - Modify the original dictionary by adding new movies or updating ratings.
+    - Show how the copied dictionary is not affected by changes to the original.
+
+15. **Restaurant Menu**: You manage a restaurant menu in a dictionary where dish names are keys, and their prices are the values. Write a program to:
+    - Copy the menu.
+    - Change prices in the original menu.
+    - Show how the copy remains unaffected by price updates in the original.
+
+---
+
+### **Nested Dictionaries**
+
+16. **University Courses**: You are managing a university system where departments are keys, and their values are dictionaries containing courses as keys and student enrollments as values. Write a Python program to:
+    - Access the number of students enrolled in a specific course within a specific department.
+    - Add a new course to a department.
+    - Update the enrollment number for an existing course.
+
+17. **Company Hierarchy**: Create a nested dictionary where department names are keys, and the values are dictionaries where employee names are keys, and their roles are values. Write a Python program to:
+    - Access the role of a specific employee in a specific department.
+    - Add a new employee to a department.
+    - Update the role of an employee.
+
+18. **Family Tree**: Create a nested dictionary to represent a family tree where each family member’s name is the key, and the value is another dictionary containing information such as age, relation, and occupation. Write a program to:
+    - Access and print the occupation of a specific family member.
+    - Update the occupation or age of a family member.
+    - Add a new member to the family tree.
+
+19. **Classroom Management**: Create a nested dictionary where each class is the key, and the value is another dictionary with student names as keys and their grades as values. Write a Python program to:
+    - Access a student's grade in a specific class.
+    - Add a new student and their grade to a class.
+    - Update the grade of an existing student.
+
+20. **Online Orders**: Create a nested dictionary to represent customer orders where customer names are the keys, and the values are dictionaries containing products as keys and the quantities ordered as values. Write a Python program to:
+    - Access the quantity of a specific product ordered by a specific customer.
+    - Add a new product to an existing customer's order.
+    - Update the quantity of a product in an order.
+
+Here are **5 questions** related to **dictionary methods** with real-world examples or scenarios to complete the list:
+
+### **Dictionary Methods**
+
+21. **Currency Converter**: You are building a currency converter where the keys are currency codes (e.g., "USD", "EUR"), and the values are exchange rates to the local currency. Write a Python program to:
+   - Use the `get()` method to retrieve the exchange rate for a given currency. If the currency is not found, return a default message like "Currency not available."
+   
+22. **Employee Records**: You maintain a dictionary of employee IDs as keys and employee names as values. Write a Python program to:
+   - Use the `pop()` method to remove an employee from the dictionary by their ID and print the updated dictionary. If the employee ID is not found, handle it gracefully.
+   
+23. **Student Grades**: You are managing student grades where student names are the keys, and their grades are the values. Write a Python program to:
+   - Use the `items()` method to print each student's name along with their grade.
+   - Use the `keys()` and `values()` methods to print all student names and their respective grades separately.
+
+24. **Grocery Prices**: You have a dictionary that stores grocery items as keys and their prices as values. Write a Python program to:
+   - Use the `update()` method to modify the price of an item, and add a new item if it doesn't already exist.
+   - Use the `setdefault()` method to add an item to the dictionary only if it doesn't exist, and print the updated dictionary.
+
+25. **Website Traffic Data**: You are tracking website visits where the keys are URLs and the values are the number of visits. Write a Python program to:
+   - Use the `popitem()` method to remove and return the last added (URL, visits) pair from the dictionary.
+   - Use the `clear()` method to reset the visit count by clearing the entire dictionary and print the empty dictionary.
+
+---