JP Morgan Selenium Interview Questions

JP Morgan Selenium Interview Questions

1>what is oop Concept or opp principle?
2>what is an interface and Why interface?
3>what is abstract class??
4>what is the difference between abstract class and interface and concrete class(normal class)
5>why Abstract class??
6>what is polymorphism?
7>what is overloading and overriding?
8>explain static and nonstatic member?
9>what is difference b/w final, finalize and finally?
10>what is the difference between equals and == operator
11>what is difference b/w String, StringBuffer and StringBuilder?
12>What is difference b/w String s=new String(),String s=””;
13>How to handle Exception in java explain?
14>what is try, catch and finally?
15>what is throw and throws?
16>what is Collection?
17>what is List?
18>what is the difference between ArrayList and LinkedList?
20>what is the difference between List, Set, Map
21>what is difference b/w Vector and ArrayList?
22>what is the difference between HashMap and Hashtable
23>what is the difference between Collection and Array?
24>Whay Collection and where you used Collection in Selenium?
25>what is difference b/w HashSet and LinkedHashSet
26>what is Iterator in java?
27>what is Difference b/w Listiterator and Iterator
28>what is default capacity of ArrayList and Hashtable?
29>what is the  difference between Constructor and Method
30>what is differnce between this and Super in java?
31>How to Sort employe class using Comparator?
32>what is super most class in java and explain all method of a superclass?
33>Does java support multiple inheritance?
34>what is astraction ?
35>what is encapsulation?
36>can we override a static method or main method?
37>what is method hiding?
38>what is difference b/w comparable and comparator?
39>what is Treeset?
40>what is Dictonary in java?

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