E-exams used in higher education can accommodate a range of assignment types that have traditionally been conducted with pen-and-paper. However, one issue that remains a challenge is proper support of sketching in larger, generic e-exams systems. Different types of sketching assignment demand input devices suited to the specific type of problem-solving. Adopting an e-exam system may involve compromises in terms of restricted opportunities to use sketching assignments as part of the e-exam that affect the students' performance or their experience of the e-exam. This paper presents a comparison of 77 students' performance and preferences with three different input devices (a mouse, a graphical tablet, and a touchpad) when solving sketching assignments from three different computer science courses. The study focused on capturing the students' perspective, and the findings include identified benefits and challenges associated with using the three different input devices during sketching. [For the full proceedings, see ED621557.]