Python Dictionary Methods — Python Technical Interview Questions & Answers

Python Dictionary Methods

Python Dictionary Methods

  • Dict methods read, update, or remove pairs. get(key, default) is the safe read. keys / values / items for loops. update merges another dict. setdefault(key, default) inserts only if the key is new. pop(key) removes and returns the value. popitem() removes one pair. clear() empties the dict.
  • Loop: for k, v in marks.items(): print(k, v). setdefault vs get: get never inserts; setdefault inserts the default when missing. That one-line difference is the viva.
  • Python Dictionary Methods — output: ['name', 'city'], then Pune, then {'name': 'Asha'}.
  { "Asha": 90, "Ravi": 85 }
         │           │
        key        value

Technical Interview Tip: setdefault vs get difference in one line.

Code Examples for Python Dictionary Methods

Example

# Dict methods
d = {"name": "Asha", "city": "Pune"}
print(list(d.keys()))
print(d.pop("city"))
print(d)

Python Dictionary Methods — output: ['name', 'city'], then Pune, then {'name': 'Asha'}.

How to Explain Python Dictionary Methods to an Interviewer

Explain Dictionary Methods as if you are teaching a junior — definition, then one tiny script.

Get / items Update / setdefault

What does the example print, and why?

Python Dictionary Methods — output: ['name', 'city'], then Pune, then {'name': 'Asha'}

What mistake do freshers make with Dictionary Methods?

Pop / clear