Crack IAS in the first attempt IAS is a dream for many, a passion for some and a way of change for a few. It makes you a celebrity overnight and for a lifetime. But many people do not know What, Why, Where, Who, Why and How of Civil Services Exam i.e. the gateway to becoming IAS / IPS / IRS / IFS officer. Civil Service exam is a common exam which gives you an opportunity to join any of the two All India Services (IAS/IPS) and 25 other Central Services (IRS/ IFS/ Railway Services) etc.