Hi Monisha,
kathy is right. I gave my exam recently, and never came across any questions that asked for details regarding the methods of the collection classes. But you need to know the significance for each collection implementation and their appropriate usage.
Aslo the objectives of
SCJP 1.4 for Collection framework mentions
1. Make appropriate selection of collection classes/interfaces to suit specified behavior requirements.
2. Distinguish between correct and incorrect implementations of hashcode methods.
Hope this helped you
Reshma