Ik heb interesse in de baan. (I have an interest in the job.)
interesse takes "in" (interesse in = interest in). Example: Ik heb interesse in de baan. (I have an interest in the job.)
Ik heb interesse in de baan. — I have an interest in the job. The preposition in is fixed, so it doesn't change with the sentence.
Fixed prepositions come up all over the A2 exam. The platform drills them in real exam tasks, AI-graded across all five DUO sections.