Python Dictionary Quiz

1. Please the correct way to empty following dictionary

student = { 
  "name": "Emma", 
  "class": 9, 
  "marks": 75 
}

2. Is Below statement True?

Items are accessed by their position in a dictionary and All keys in a dictionary must be of the same type.

3. Select the correct way to print Emma’s age.

student = {1: {'name': 'Emma', 'age': '27', 'sex': 'Female'},
           2: {'name': 'Mike', 'age': '22', 'sex': 'Male'}}

4. What will be the output of the following Python code?

my_dict = {"x": 10}
print(my_dict.get("y", "Key Not Found"))
print(my_dict.get("x", "Key Not Found"))

5. In Python, Dictionaries are immutable

6. Which of the following best describes a Python dictionary?

7. What happens if you try to add a new key-value pair to a dictionary where the key already exists?

8. Which of the following iterables can be directly converted to a dictionary using the dict() constructor?

9. What will be the output of the following Python code?

data = {"x": 10, "y": 20}
data["z"] = data.pop("x")
print(data)

10. Which method is used to get the value associated with a given key, returning None or a specified default if the key is not found?

11. Which method removes a specified key and its associated value from a dictionary, returning the value, and raising a KeyError if the key is not found?

12. Why must dictionary keys be immutable (hashable)?

13. When you use dict1.copy() to create dict2 = dict1.copy(), what kind of copy is created?

14. Dictionary keys must be immutable

15. Select the correct way to access the value of a history subject

sampleDict = { 
   "class":{ 
      "student":{ 
         "name":"Mike",
         "marks":{ 
            "physics":70,
            "history":80
         }
      }
   }
}

16. What does dict.fromkeys(['a', 'b'], 0) return?

17. What will be the output of the following Python code?

d1 = {"a": 1, "b": 2}
d2 = {"b": 3, "c": 4}
d1.update(d2)
print(d1["b"])

18. Select all correct way to remove the key marks from a dictionary

student = { 
  "name": "Emma", 
  "class": 9, 
  "marks": 75 
}

19. What will be the output of the following Python code?

grades = {"Math": 90, "Science": 85, "English": 92}
for subject in grades:
    print(subject)

20. What will be the output of the following Python code?

mapping = dict(zip(['one', 'two'], [1, 2]))
print(mapping)

21. What will be the output of the following Python code?

profile = {"name": "John", "age": 25, "city": "New York"}
keys = list(profile.keys())
keys.sort()
print(keys[0])

22. What will be the output of the following Python code?

my_dict = {"a": 1, "b": 2}
value = my_dict.pop("b")
print(value)
print(my_dict)

23. Which of the following is NOT a valid way to create a Python dictionary?

24. What does the dict.popitem() method do?

25. What is the primary use case for the dict.setdefault(key, default_value) method?