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The ebook is free to use for your personal and career interests. Please forward this error screen to 23. Question and Answer for Some very tricky JDBC interview questions asked to experienced senior Java Developers. A good understanding of JDBC API is required to understand and leverage many powerful features of Java technology. Here are few important practical questions and answers which can be asked in a Core Java JDBC interview. Most of the java developers are required to use JDBC API in some type of application. Though its really common, not many people understand the real depth of this powerful java API.
Dozens of relational databases are seamlessly connected using java due to the simplicity of this API. To name a few Oracle, MySQL, Postgres and MS SQL are some popular ones. This article is going to cover a lot of general questions and some of the really in-depth ones to. What are available drivers in JDBC? JDBC API access via one or more ODBC drivers. Hence, this kind of driver is generally most appropriate when automatic installation and downloading of a Java technology application is not important. JDBC calls into calls on the client API for Oracle, Sybase, Informix, DB2, or other DBMS.
Note that, like the bridge driver, this style of driver requires that some binary code be loaded on each client machine. The specific protocol used depends on the vendor. In general, this is the most flexible JDBC API alternative. It is likely that all vendors of this solution will provide products suitable for Intranet use. In order for these products to also support Internet access they must handle the additional requirements for security, access through firewalls, etc. Several vendors are adding JDBC technology-based drivers to their existing database middleware products.
JDBC technology calls into the network protocol used by DBMSs directly. Since many of these protocols are proprietary the database vendors themselves will be the primary source for this style of driver. Several database vendors have these in progress. What are the types of statements in JDBC? This interface is used for executing a static SQL statement and returning the results it produces. The object of Statement class can be created using Connection.
This object can then be used to efficiently execute this statement multiple times. This interface is used to execute SQL stored procedures. What is a stored procedure? How to call stored procedure using JDBC API? Stored procedure is a group of SQL statements that forms a logical unit and performs a particular task. Stored Procedures are used to encapsulate a set of operations or queries to execute on database. Below code snippet shows how this can be achieved.
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