What is the aptitude test all about

Can you please let me know how - what was the presentation about

Dear Sir , can you help me out what was the interview about as i am having assessment center by coming week , i have applied for a post which is junior to the above post (senior Analyst) but relates to finance . It will be really helpful to know what is in assessment center group / indivisual meetings , presentation or similar . And please shed some light on this . I will be very thankful for your assistance .