It isn't about spouting a correct answer parrot fashion ...... and with some feedback from an unsuccessful attempt and a bit of hard work, you can pass them.
PQA's ... personal qualities and attributes are a test of how you have behaved in a given situation in the past, which according to the experts who devise them, will be an indicator of future behaviour.
By spending time understanding them and what is being asked, anyone can pass them. It's about having perception and showing what YOU did, not everyone else, as they are not of interest.
With regard to ADC's, there should be an Initial Test of Potential, which tests the PQA's aswell as time management, organisational skills etc.
If this is passed, then an ADC (Assessment and Development Centre) is the next step. this is a series of further tests in given scenarios using role play and could be one to one or a group. This again tests management skills, how you prioritise information and tasks and manage people.
If success is achieved here, then a development programme is the reward.
I'm old enough to remember the statutory exams and managed to get as far as the subs written before they were phased out. My next step will be the Middle Managers ADC ...... as long as I pass the Initial test.
In this modern Service, development is extremely important and this is achieved through feedback from assessors which will identify areas that need development. It relies on candidates doing some work though and being able to take a knock back.
I was deemed "not suitable" for promotion last year following series of assessments. I got my feedback, listened, looked for opportunities that I could use to develop myself, worked hard and have passed this year with the reward of a job, proof that it does work.