[Solved] What will be the output of this code?with open('sample.txt', 'w') as f: f.write('123') with open('sample.txt', 'a') as f: f.write('456') with open('sample.txt', 'r') as f: print(f.read()) | Python

Python - Standard Library Usage

What will be the output of this code?

with open('sample.txt', 'w') as f:
    f.write('123')
with open('sample.txt', 'a') as f:
    f.write('456')
with open('sample.txt', 'r') as f:
    print(f.read())

A123456

B456

C123

DError

Step-by-Step Solution

Solution:

Step 1: Write '123' to file in write mode
The first block opens the file in 'w' mode, which creates or overwrites the file with '123'.
Step 2: Append '456' to the file
The second block opens the file in 'a' mode, adding '456' to the end, so file content becomes '123456'.
Step 3: Read and print the file content
The third block reads the entire file and prints '123456'.
Final Answer:
123456 -> Option A
Quick Check:
Write + Append = combined content [OK]

Quick Trick: Write mode overwrites; append mode adds at end [OK]

Common Mistakes:

Assuming append overwrites
Expecting only last write
Confusing read mode output

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What will be the output of this code?

Step 1: Write '123' to file in write mode

Step 2: Append '456' to the file

Step 3: Read and print the file content

Final Answer:

Quick Check:

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