The most brilliant answer is useless if you run out of time. Practicing with real DIT past papers under timed conditions (e.g., 2 hours for a standard DIT exam) trains your brain to allocate minutes per mark. You learn to quickly skip questions you can’t solve and focus on high-yield answers.
Never underestimate the power of asking directly. Lecturers and administrative staff in specific schools (e.g., the School of Electrical and Electronic Engineering, or the School of Culinary Arts) often keep physical binders of DIT past papers from 2015, 2016, 2017, etc. dit past papers