Yes
Read all about it. The Civil Service is very open about what it is looking for and very clear about how you need to apply. Look at the core competencies and make sure your application shows how you can demonstrate them. Read the advice on taking online selection tests (pdf) . CDEC has links to some online practice tests
No
Don’t leave things to the last minute. Once you have registered you will have a set number of days to complete each stage of the application process, from self-assessment tests to practice tests to online tests to the e-application form. The deadline for the graduate fast stream is 30th November. Don’t worry if you don’t get through this year, try again next year. Or look for non-Fast Stream schemes in individual departments. You can apply to transfer to Fast Stream later if you like
See Also:
CDEC’s Psychometric Tests – at the bottom of the page you will find a range of online practice tests
Civil Service Fast Stream – official website. Everything you need to know about applying for Fast Stream
Other specialist Fast Stream schemes for Technology in Business, Statisticians and Economists