What is the most important feature of Java?

Correct Answer: historical data from legacy systems

Explanation:

A data warehouse is a relational database that is designed for query and analysis rather than transaction processing. It usually contains historical data that is derived from transaction data, but it can include data from other sources. Data warehouses are designed to help you analyze your data.

Correct Answer: Shared pool in oracle contains cache information that collects, parses, interprets and executes SQL statements that goes against database This shared pool acts like a buffer for these SQL statements

Correct Answer: SQL> ALTER USER user_name ACCOUNT LOCK; SQL> ALTER USER user_name ACCOUNT UNLOCK;

Correct Answer: Locking is a mechanism to ensure data integrity while allowing maximum concurrent access to data It is used to implement concurrency control when multiple users access table to manipulate its data at the same time Advantages : - Avoids deadlock conditions - Avoids clashes in capturing the resources

Correct Answer: A Peoplesoft database is expression which point out a database containing Peoplesoft objects For Oracle and only for Oracle, Peoplesoft consists in 3 schemas namely: - PS (PSDBOWNER table owner), - PEOPLE (for connection checking) and - SYSADM (by default), the last one contains all the objects/data One of the database objects is connected with single Oracle schema, and all processes that connect to the database use the standard PSFT login procedure PSFT login is used because to refer to the collection of tables in the administrative schema within an Oracle database Every process that makes a 2-tier connection to the database identifies itself with a PSFT user or operator ID Hence the interaction goes

Correct Answer: JDK is Java Development Kit which is for development purpose and it includes execution environment also JVM is Java Virtual Machine which is a run time environment for the compiled java class files Hence you will not be able to compile your source files using a JVM

Correct Answer: Platform independence means that we can write and compile the java code in one platform (Eg Windows) and can execute the class in any other supported platform (Eg Linux,Solaris,etc)

Correct Answer: Instance variables are those which are defined at the class level Instance variables need not be initialized before using them as they are automatically initialized to their default values

Correct Answer: Java doesn't support multiple inheritance

Correct Answer: In Java, Arrays are objects