200-901 Software Development and Design Practice Question
Given the following Python code snippet:
with open('config.json', 'r') as f:data = json.load(f)
print(data['interfaces'][0]['name'])
What is the expected output if config.json contains {"interfaces": [{"name": "GigabitEthernet0/1"}]}?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
GigabitEthernet0/1
json.load() reads the file and returns a dict; then accessing the nested structure yields 'GigabitEthernet0/1'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
GigabitEthernet0/1
Why this is correct
Correctly accesses the first interface's name.
- ✗
None
Why it's wrong here
The value is present, so None is not returned.
- ✗
interfaces
Why it's wrong here
Does not access the list element.
- ✗
Error: list indices must be integers
Why it's wrong here
The code correctly uses integer index 0.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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