What is the Selection Process at Aon Hewitt?

Aon Hewitt has various recruitment procedures as campus recruitment , off campus recruitment and walk-in interviews. However, there is a proper selection process which is as follows:
Online Aptitude Test,
Technical Interview,
HR Interview.
For more information, Aon Selection Process.
Aon Exam Pattern
Aon conducts an Online Aptitude Test as its first step of selection procedure. The exam is online and bilingual. The exam includes analytical, english and psychometric test, which works as an elimination round. The candidate gets the results soon after the submission, and they get eliminated after every round.

Syllabus
The test pattern includes: 
Quantitative Aptitude+ Analytical Ability+ English Language - This section consists of 45 questions each and the time durability is 60 minutes.The questions in Dell Quantitative Aptitude Section are from Topics like Algebra, Time & Distance, Speed & Distance, Profit & Loss, HCF, LCM, arithmetic, percentage, geometry etc.
Analytical Ability questions are generally of higher Level & time-consuming too. It includes questions from Topics like Puzzles, Syllogism, Blood relations, Data sufficiency & Pattern Recognition. 
English Language section consists of short Reading comprehension Passages. This sections also consist of basic grammar usage. This section is a higher level.