DATA ANALYSIS ALTSCHOOL CIRCLE 7 QUIZ 30/8/2025

Which of the following creates a dictionary in Python?

• dict = (1, 2, 3)
  

• dict = [1: "one", 2: "two"]
  

• dict = {1: "one", 2: "two"}
  

• dict = 1 => "one", 2 => "two"

How do you access the value of key "name" in student = {"name": "John", "age": 20}?

• student[0]
  

• student.get("name")

• student["John"]

• student("name")

Which statement correctly adds a new key-value pair to a dictionary?

• d.append("city", "Lagos")
  

• d.insert("city", "Lagos")
  

• d["city"] = "Lagos"
  

• add(d, "city", "Lagos")

What will len({"a":1, "b":2, "c":3}) return?

• 6

• 3

• 2

• 1

What happens if you use a mutable type (like list) as a dictionary key?

• Works fine
  

• B. Returns True
  

• Causes an error

• Stores as string automatically

How do you access "Maths" in student = {"name":"John","grades":{"Maths":90,"English":80}}?

• student["Maths"]
  

• student["grades"]["Maths"]
  

• student.get("Maths")
  

• student["John"]["Maths"]

Which of the following represents a nested dictionary?

• {1:2, 3:4}
  

• {"a":{"x":1,"y":2}}
  

• {"a":1, "b":2}
  

• [{"a":1},{"b":2}]

What is the output of:

info = {"student": {"name": "Ali", "age": 21}}

print(info["student"]["age"])

• "student"
  

• "age"
  

• 21
  

• Error

Which method is best to safely access a nested key without error?

• dict.pop()
  

• dict.update()
  

• dict.get()
  

• dict.remove()

A dictionary inside another dictionary is called:

• Sublist
  

• Nested dictionary
  

• Dictionary comprehension
  

• Tuple dictionary