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Core Java Interview Questions
Questions Answers Views Company eMail

what is ennumaration?

Amdocs,

2 6390

what is difference between servletconfig and servletcontext?

Amdocs,

3 6482

what is custom tags with example?

Amdocs,

3 5267

what is connection pooling with example?

Amdocs,

3 9871

what is the use of bean managed and container managed with example?

EDS,

1489

what is difference between type 4 driver and type 1 driver?

CMC, CTS, IBM, JK Technosoft, Napier Healthcare,

2 12425

what is difference between prepare stetement and callable starement with example?

CMC,

1 4469

what is the use of abstract class and interface with example?

Cycore, DNS, Technoram,

2 13602

what is overloading and overriding with example?

CMC,

2 15371

C and C++ has constructors and distructors, why does Java does not have distructors?

T3 Softwares,

1 3904

How is Garbage collection done in Java?

T3 Softwares,

3 8223

Difference between overloading and Overriding. (also asked in PA Consultancy Group,iflex,Value chain,IBM,CTS,Accenture, Tarang>

Accenture, CTS, Extensio, IBM, iFlex, PA Consulting, Symphony, Tarang,

12 27416

where is .equals() method and how is it different from == operation Is hashing related to these?

iFlex,

4 6364

explain System.out.println()

CTS,

12 16831

what is wrapper class and its uses?

 2 5859

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Un-Answered Questions { Core Java }

Tell us something about an iterator.

544

What is a java applet? What is an interface?

625

What does the @override annotation do?

556

What is reverse function?

566

What is meant by class loader? How many types are there?

668




Will the compiler creates a default constructor if I have a parameterized constructor in the class?

579

How hashset works internally in java?

580

Explain java thread life cycle.

576

List out benefits of object oriented programming language?

476

Have you ever used hashtable and dictionary?

568

what is the difference between Object Based Language and Object Oriented Language?

593

What is starvation?

677

Given a singly linked list, determine whether it contains a loop or not without using temporary space?

580

What is the tradeoff between using an unordered array versus an ordered array?

655

What is difference between iterator and enumeration in java?

520

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