is it advanced SHL?
What test provider does OC&C use for its online tests at their London office?
OC&C uses advanced SHL test. They are similar to the one Bain London has.
I suggest using platform myofferprep.com for preparation.
All the best,
Which companies are currently using written tests ?
All major firms like McKinsey, BCG and Bain use tests to assess a candidate's analytical skills. However the design of those tests can differ a lot.