Q1. What is an Iterator?
Ans. Iterator is an interface that provides methods to iterate over any Collection.
Q2. What is a Cursor ?
Ans. It's a facility that allows traversal over the records pulled from a table or combination of tables. Its like iterator in Java.
Q3. What is CopyOnWriteArrayList ?
Ans. Its a type of ArrayList in which all Write operations , i.e add and set are performed by creating a new copy. This array never changes during the lifetime of the iterator, so it never throws ConcurrentModificationException
Q4. Iterator is a / an ...
a.Abstract Class
b.Concrete Class
c.Interface
d.Package
Ans.Interface
Ans. Iterator is an interface that provides methods to iterate over any Collection.
Q2. What is a Cursor ?
Ans. It's a facility that allows traversal over the records pulled from a table or combination of tables. Its like iterator in Java.
Q3. What is CopyOnWriteArrayList ?
Ans. Its a type of ArrayList in which all Write operations , i.e add and set are performed by creating a new copy. This array never changes during the lifetime of the iterator, so it never throws ConcurrentModificationException
Q4. Iterator is a / an ...
a.Abstract Class
b.Concrete Class
c.Interface
d.Package
Ans.Interface