Interview Questions

When creating a thread by extending the Thread class, it is not mandatory to override the run method (If we are not overriding the run method , it is useless), because Thread class have already given a default implementation for run method. But if we are implementing Runnable , it is mandatory to override the run method. The preferred way to create a thread is by implementing Runnable interface, because it give loose coupling.

A thread can be created by subclassing Thread, or by implementing the Runnable interface.

- FTP is used to upload the files on the server from the client side where it is installed on the computer of clients. 

- FTP client is checked for the installation of the software and according to that the appropriate directory is uploaded on the hosting server. 

- The hosting server uploads the files that is being created by the user and set the permissions for it so that public can access it. 

- Web hosting uses different directories like HTML that is used as var/www/html that is determined using the FTP client. 

- Initial local directory is being set up using FTP client and it is where the website gets stored. 

- The transfer mode is being determined for the files that need to be transferred either in ASCII or BINARY mode.

var obj = new Object(); or var obj = {};

A center equipped to handle a large volume of telephone calls. These calls could be the calls coming in from customers for service or support or these could be the calls that call center executives make to the customers for marketing

There are mainly two types of call centers :

a) Inbound call centers – Inbound call centers are those which receive support or service calls from customers usually on a toll free number. For e.g. when you call up a bank to check the status of your request for credit card, it is an inbound call.

b) Outbound call centers – Outbound call centers are those in which the call center executives make calls to the customers. These calls are usually made to generate the leads or sales. For e.g. when you receive a call from a bank offering you a personal loan, it is an outbound call. 

Service oriented architecture (SOA) is an architectural style that supports service oriented methodology that is being added in the cloud architecture as a mandatory component. Cloud architecture support the use of on-demand access to resources and it provides lots of other facilities that are being found in SOA as well. SOA makes these requirements optional to use. But, to get the full functionality and more performance based efficiency there is a requirement for the mixture of SOA and cloud architecture.

When an exception is thrown , the catch block of the try statement are examined in the order in which they appear. The first catch block that is capable of handling the exception is executed. The remaining catch blocks are ignored

Array is collection of same data type. Array size is fixed, It cannot be expanded.

But ArrayList is a growable collection of objects.ArrayList is a part of Collections Framework and can work with only objects.