How can specific fields be extracted from a JSON object?

To extract specific fields from a JSON object, you need to:

1. Parse the JSON into a data structure (e.g., a dictionary or object).
2. Access the desired fields by their keys.

Example in Python:

import json

json_str = '{"name": "Ivan", "age": 30, "city": "Moscow"}'
data = json.loads(json_str)

name = data["name"]  # "Ivan"
age = data["age"]    # 30

In automation testing tools (e.g., Postman, REST-assured), there are built-in methods for parsing JSON and retrieving values by keys.