What kind of difficulties have you observed when performing cross browser testing?

- What happens when you type "google" in a web browser? - What is a static block? - For No duplicate and insertion order maintained which Java Data Structures you would use? - What happens when you type Sysout out of the main method? - What happens when you type Sysout inside a static block? - What is constructor? - What is a default constructor? - How does HashMap is implemented? - Difference between HashMap and Hashtable? - What is a framework and test suite? - What is a difference between Before Test, Before Method, Before Suite? - TestNG annotations - Data Provider and Parameters, Threadpool size, Invocation Count - What is the way to call the same test case N number of times using TestNG?