Interview Questions

It is necessary to understand some of the concepts used extensively in object oriented programming.These include

Objects
Classes
Data abstraction and encapsulation
Inheritance
Polymorphism
Dynamic Binding
Message passing

java bean is a reusable component, where as the servlet is the java program which extends the server capability. 

When we create string with new() Operator, it’s created in heap and not added into string pool while String created using literal are created in String pool itself which exists in PermGen area of heap.

String s = new String("Test");

does not put the object in String pool , we need to call String.intern() method which is used to put them into String pool explicitly. its only when you create String object as String literal e.g. String s = "Test" Java automatically put that into String pool.

Exploratory testing: means testing an application without a test plan and test script. In exploring testing test explore the application on the basis on his knowledge. The tester has no knowledge about the application previously. He explores the application like an end user and try to use it. While using the application his main motive is to find the bugs which are in the application.

Specification-driven testing: means to test the functionality of software according to the user requirements. In this, tester inputs multiple data and monitors the outputs from, the test object. In this testing tester evaluate the showstopper bugs which break the major functionality of the application. This type of testing requires test plan and test.

These objects provide two levels of scope:

Application State

Data stored in the application object can be shared by all the sessions of the application.

Application object stores data in the key value pair.

TCP-Transmission Control Protocol

UDP- user Datagram protocol

UDP is user assisted program and converts the application into the encapsulated form and makes it end point for data to send and then TCP helps in transmission or broadcast!

The interest-rate effect suggests that an increase in the price level will increase the demand for money, increase interest rates, and decrease consumption and investment spending.

A call to onStop method happens when an activity is no longer visible to the user, either because another activity has taken over or if in front of that activity.