03.04 Data Structures Overview - Quiz

Check your understanding

1. What is a data structure?

   • A way of writing Python code more efficiently
   • A method for organizing and storing data so it can be accessed and modified efficiently { data-correct }
   • A type of algorithm for sorting data
   • A programming language feature for creating variables

2. In Python, which data structure is used to represent single-dimensional arrays?

   • Tuples
   • Sets
   • Lists { data-correct }
   • Dictionaries

3. How do you access the first element in a Python list called grades?

   • grades[1]
   • grades[0] { data-correct }
   • grades.first()
   • grades[-1]

4. What would be the result of grades[1][2] if grades = [[85, 92, 78], [91, 87, 94]]?

   • 85
   • 92
   • 94 { data-correct }
   • 87

5. Which data structure is best for grouping related information like a student’s name, age, and grade?

   • List
   • Dictionary (Record) { data-correct }
   • Stack
   • CSV file

6. In a stack data structure, which principle does it follow?

   • First In, First Out (FIFO)
   • Last In, First Out (LIFO) { data-correct }
   • Random Access
   • Alphabetical Order

7. Which Python operation is used to add an element to the top of a stack (implemented as a list)?

   • insert()
   • add()
   • append() { data-correct }
   • push()

8. What is the main advantage of using a hash table (Python dictionary) for a phone book?

   • It automatically sorts names alphabetically
   • It provides instant lookup by name { data-correct }
   • It uses less memory than other data structures
   • It can store more phone numbers

9. Which data structure would be most appropriate for representing a family tree?

   • List
   • Stack
   • Tree { data-correct }
   • CSV file

10. In CSV files, what does CSV stand for?

    • Computer Separated Values
    • Comma Separated Values { data-correct }
    • Character Separated Variables
    • Column Separated Variables

11. If you need to implement an “undo” function in a text editor, which data structure would be most appropriate?

    • List with random access
    • Dictionary
    • Stack { data-correct }
    • Tree

12. Which of the following is the best use case for a 2D list (multidimensional array)?

    • Storing a single student’s grades
    • Representing a game board or seating chart { data-correct }
    • Implementing a phone book lookup
    • Creating an undo function