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Oracle Core Java Interview Questions
Questions Answers Views Company eMail

Difference between this(), super()?

12 28929

What is singleton class?

16 60000

Difference between JDK, JRE, JVM

16 86768

what is meant by string pooling?

12 32727

explain System.out.println

107 159564





What is compile time polymorphism?

20 29631

what is bytecode? watz the difference between machine code and bytecode?

9 25023

What is the basically use of finally while we know it is always executed but why?

5 6513

Read data from console and print in one file. That would be in C:\temp ? Thanks, Bose

3 5709

I have one POJO class(Java bean class), it has two variables for that it has setters and getters. Now i have created two objects for that class and i have set the data for those variables through this two objects. Now question is i want check whether those two objects have same data or not, for this write a program? Thanks, Bose.

2 14456

i need example for java abstraction. where we use abstraction and why we need abstraction.

2 11937

What are the Abstract Classes provided by Java?

5 7008

Why are inner classes required?

3 5922

How can we get one Interface methods whit out using implementation of interface

1 2639

Which is the best way of exception handling?

2 5195

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Oracle Core Java Interview Questions


Un-Answered Questions

write a code for this. serial_number contained in the header of the file will be read , if this serial number is less than a previous serial number within a successfully processed file, or is the same as another serial number within a successfully processed file, or if the field contains anything other than 7 digits, then the file must error with the reason ‘Invalid SERIAL_NUMBER’.

1386


Which is the purpose for using the scriptmanager?

279


What is container-managed persistence?

225


What providers does Ado.net uses?

252


Explain db?

336






What is clustered index

221


How does cluster communication happen?

232


Assuming that the density of the solution is the same as the density of water (density of water=1.000g/ml), calculate the mass of water for both reactions using: mass of water = Volume of water Density of water. Mass of water =

1618


How do you clear the cache on a website?

41


How does a seismograph works?

247


What are the types of partitions in oracle?

204


what about is the default port number for mq queue manager?

212


What type of interrupts are used for critical events and why?

251


Can arraylist store primitives?

170


What is the use of connection object in ado.net?

254