What will be the content of file.txt after running this code if the file initially contains 'Data'?

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Python - File Handling Fundamentals

What will be the content of file.txt after running this code if the file initially contains 'Data'?

with open('file.txt', 'a') as f:
    f.write('123')

AData

B123Data

C123

DData123

Step-by-Step Solution

Solution:

Step 1: Understand append mode behavior
Opening with 'a' adds new data at the end of existing content.
Step 2: Write operation adds '123' after 'Data'
The file content becomes 'Data' + '123' = 'Data123'.
Final Answer:
Data123 -> Option D
Quick Check:
Append adds at end = Data123 [OK]

Quick Trick: Appending adds data after existing content [OK]

Common Mistakes:

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