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Why there is a need to use primary key in database ?
Primary key is a constraint basically used in datdabase to uniquely identify the records in the database.
When should I use abstract classes and when should I use interfaces? Use Interface, when: Design changing often or when various implementations only share method sign
Relation between Stack and Heap Stack and heap are two significant memory areas. Primitives are created on the stack whereas objects are created on heap. This will be further c
Write a Java ADB client to perform the following- The client will read the contents of the file - invoice.txt. The first line of the file will display the type of the currency. The
EJB 2.0 has the additional advantages over the EJB 1.1 given below 1. Local interfaces : These are beans that can be needed locally, that means by the same Java Virtual Machi
Explain switch statement in java language? Switch statements are shorthands for a certain type of if statement. It is not common to see a stack of if statements all related
define stack
(Package Inheritance Hierarchy) Package-delivery services, such as FedEx®, DHL® and UPS®, offer a number of different shipping options, each with specific costs associated. Create
What is the name of the services you have chosen? What do they do? What is the name of the publisher? Provide details if you are developing your own service(s). There are variou
What are object/relational mapping integration module? Ans) Spring also supports for using of an object/relational mapping (ORM) tool over straight JDBC by giving the ORM module
Having one instance overall the application.eg.: Loggers
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