PCEP input() Practice Question

Exhibit

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

A developer encounters a TypeError. Which line of code likely caused it?

⚠ Common exam trap

Candidates often assume the error is a ValueError from failed conversion, but the actual error that occurs with option D is a TypeError from using the unconverted string in arithmetic.

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

✓

value = input("Enter a number: ")

The error in question is a TypeError that occurs when a string is used in an arithmetic operation (e.g., adding a string to an integer). Option D returns a string, so subsequent code expecting a number will fail. Options A, B, and C all return numeric types, so they would not cause that specific error.

Answer analysis

Option-by-option breakdown

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

✗
value = eval(input("Enter a number: "))
Why it's wrong here
eval() interprets input as code, but risky; would not cause this error if input is number.
✗
value = float(input("Enter a number: "))
Why it's wrong here
Convert to float, no error.
✗
value = int(input("Enter a number: "))
Why it's wrong here
Convert to int, no error.
✓
value = input("Enter a number: ")
Why this is correct
input() returns a string, causing the TypeError.

Go deeper

PCEP input() Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

Related to this question