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Core Java Interview Questions
Questions Answers Views Company eMail

Can we declare Pointer in Java?

 3 291

What is the default value stored in Local Variables?

 3 291

Difference in the use of print, println, and printf.

 3 289

Is it possible to make an array volatile?

 3 346

What is an object-oriented paradigm?

 4 334

What are the Memory Allocations available in JavaJava?

 1 222

What is a singleton class in Java? And How to implement a singleton class?

 2 236

Can you explain the Java thread lifecycle?

 1 282

In the below Java Program, how many objects are eligible for garbage collection?

 1 265

What is JDK? Mention the variants of JDK?

 1 203

What are Brief Access Specifiers and Types of Access Specifiers?

 1 198

Explain Method Overloading in Java.

 1 261

Give a briefing on the life cycle of a thread.

 1 243

Brief the life cycle of an applet.

 1 186

What are the observer and observable classes?

 1 271

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Un-Answered Questions { Core Java }

What is a “stateless” protocol ?

686

Explain the usage of this with constructors?

673

What is the concatenation operator in java?

735

Explain about anonymous inner classes ?

703

How concurrent hashmap works?

782




What is the difference between super class & sub class?

711

What is json parser in java?

753

Wha is the output from system.out.println(“hello”+null); ?

819

What is java util list?

601

What is a cup of java?

697

What is an argument in java?

634

Is ++ operator thread-safe in java?

776

What are the classes of java?

661

How can I become a good programmer?

612

What is an infinite loop? How infinite loop is declared?

701

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