Technology Questions

Every architecture rely on a database that is easy to maintain and gets easily configured Amazon uses the database by the name SimpleDB. This is the database that is used for cloud architecture to track the statuses of the components. The component of the system are asynchronous and discrete, it requires capturing the state of the system so that in any failure the user can easily revert back to its normal configuration. SimpleDB is schema-less database and there is no need to define the structure before the creation of any data. Every controller in the database defines their own structure and link the data to a job.

SQL is a structured query language while PL/SQL is an extension of SQL by introducing a procedural flow. PL/SQL has blocks of statements. PL/SQL works like other procedural languages and has concepts like control statements, sequential statements, exception handling etc.

Static member class is a class defined inside outer class with static modifier.

EX:

Class A {  //top level class or outer class

    .....

    static class B {  //static member class

    }

   .....

}

Use case is nothing but the functional specification document in which all the customer requirements are documented.

Test case is a document which tells wat to test, steps to test and expected and actual results.

COMMIT statements are used to release locks which are required for that unit of work, and then permit a new unit of work. In other words, if COMMITS are not coded in the program and the program has been sent for execution, then while processing, in place of just going back to a few inserts since the nearest commit, the program has to go back to the inserts which were made during the entire run of the program. This extra process takes around twice or thrice the time taken normally.

DriverManager is a class in java.sql package. It is the basic service for managing a set of JDBC drivers.

- The web pages that are loading slowly might be using heavy scripts or might be getting loaded on an overloaded server. 

- If the content like flash is used then the web page performs really slowly in comparison to the normal pages that get created. 

- If the caching is inactive on the web browsers and the same web page is getting loaded again and again then the performance get degraded.

- Web pages load slowly due to the content on that page as if it is text it loads faster then the site that is made up of large photographs. 

- It takes longer time for a picture to get rendered and the transmission time also remains higher then the text.

bcoz interface does not contains any initializers and constructors to initialize its data members.