Final answer:
A path p is not infeasible if there is a test case that causes it to be executed; it's infeasible when no test cases exist that lead to its traversal.
Step-by-step explanation:
The student has asked whether a path p is infeasible if there exists only one test case which, when input to program P, causes p to be traversed. The statement is false. A path is considered infeasible if there are no inputs that can cause the path to be executed during the program's run. In contrast, if there is even one test case that can cause the path to be traversed, then the path is feasible. Infeasibility in program paths typically implies that during the flow of the program's logic, there is no set of conditions or inputs that will result in the path's execution. This scenario is usually the result of code with conditional statements that cannot all be satisfied simultaneously or are contradictory.