Should I know all Java APIs?

Answer 1

the answer for your question is yes and no. you no need to Know all APIs that are in Java. you should concentrate on APIs that are useful to your task. for example if you want to use collection frame work in ur task, you should know how it works, it's classes and methods.....etc. if you are working on selenium API you should know it's structure, classes.....etc. the main key in Java is " how to use API?? which includes using its classes, methods....etc" then you are ready.

Answer 2

@raja shekar
Thank you