PCEP Practice Question: Data Types, Variables, Basic I/O and Operators

Exhibit

Traceback (most recent call last):
  File "script.py", line 3, in <module>
    result = "5" + 10
TypeError: can only concatenate str (not "int") to str

Refer to the exhibit. What is the cause of the error?

⚠ Common exam trap

Python Institute often tests the misconception that Python will automatically convert types (like JavaScript does), leading candidates to think the code will run without error, when in fact Python raises a TypeError for mixed-type `+` operations.

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

✓

Using + on incompatible types (str and int)

The error occurs because the `+` operator is being used between a string and an integer, which are incompatible types in Python. Python does not implicitly convert the integer to a string for concatenation; it raises a `TypeError: unsupported operand type(s) for +: 'str' and 'int'`.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Using + on incompatible types (str and int)
Why this is correct
Python cannot concatenate string and int without conversion.
✗
Division by zero
Why it's wrong here
No division in the code.
✗
Missing import statement
Why it's wrong here
No import needed for basic operations.
✗
Variable not defined
Why it's wrong here
The variable 'result' is being assigned.

Go deeper

PCEP Practice Question: Data Types, Variables, Basic I/O and Operators

Exhibit

Why each option matters

Option-by-option breakdown

Related to this question