Clover Infotech Interview Questions, Process, and Tips

RAC (Real Application Clusters) startup sequence involves starting the Oracle database instances on multiple nodes in a cluster.

• Each node in the cluster starts its own Oracle database instance

• The Oracle Clusterware manages the startup sequence to ensure proper coordination

• The database instances communicate with each other to synchronize data and maintain consistency

SQL statement processing involves parsing, optimization, and execution.

• Parsing: Breaking down the SQL statement into components like keywords, table names, and conditions.

• Optimization: Creating an efficient execution plan based on indexes, statistics, and query structure.

• Execution: Retrieving data from tables, applying filters, and returning results to the user.

Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• Abstract classes can have constructors, fields, and non-abstract methods.

• Interfaces can only have abstract methods and constants.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces defi

Stored procedures are precompiled SQL queries stored in the database, while functions are reusable blocks of code that return a value.

• Stored procedures are used for executing a set of SQL statements, while functions are used to perform specific tasks and return a value.

• Stored procedures can have input and output parameters, while functions always return a value.

• Stored procedures can modify data in the database, while f...read more