the type of tests depend on the company you are interviewing with. The most common used I am aware of are:
- McKinsey: PST, or more recently SHL
- BCG: Potential test, or sometimes SHL + a logic test based on traffic lights color (two or more traffic lights are connected by codes; each code change a color of the traffic light; one of the code is broken and you have to understand which is the broken one)
- Bain: Not common in Europe, sometimes present in other countries. In Russia and Australia: written test; in America: GMAT style test
- Oliver Wyman and OC&C: GMAT style math test, sometimes in person, sometimes online
PrepLounge also provided a pretty complete list here:
Each one has its own criteria, and in general the best kind of preparation is to prepare in advance on the same type of test – for all of them you should be able to find free and paid version online. Preparing just on GMAT for - say - McKinsey PST is not recommended, you would not cover all the aspects of the test.
Some general tips on analytical tests that can be useful are:
- Commit to a time for each question, and go on if you surpass that time. If you do not set discipline, you will end eating too much time for some questions (these tests sometimes are actually structured to have some questions it is better to skip and review at the end). If time and test allows, you can then go back to the questions at the end.
- Practice a lot of math before – it is normally a key component of all the tests
- Use elimination process when in doubts in multiple choice question
- For PST, Potential test and Written test: Practice graph interpretation
- For PST, Potential test and Written test: Practice quick reading and quick understading of key information only
Finally, it is important you understand in advance if you get penalized for wrong answers (eg Potential Test) or not (eg PST), that may change your strategy.
You can also find a pretty comprehensive list of tips here:
Hope this helps; if you have any specific questions on one of the mentioned tests feel free to ask.