Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

Can we declare a class as static?

1106

Can we have try without catch block?

1087

What is the use of System class?

1167

What is Enum in Java?

1325

What is Java Annotations?

1112

What are the important features of Java 9 release?

1007

When can we say that threads are not lightweight process in java?

1166

What is a blocking method in Java?

1252

What are the main differences between notify and notifyAll in Java?

1099

Can It is possible to synchronize the constructor of a Java Class?

1140

Can you start a thread twice in Java?

1127

What are the two main uses of volatile in Java?

1063

How to create a thread in java?

1145

How can you share data between two thread in Java?

953

What is Java Shutdown Hook?

1208

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Un-Answered Questions { Core Java }

What does opcode mean?

1093

What design pattern you have used in your project? I answered Factory pattern, how it is implemented? What are its advantage? Do know about Abstract Factory?

2513

What is not thread safe?

991

What are constructors in java?

1123

What is the hashcode () and equals () used for?

1044

What is stack example?

1035

What do you mean by JVM?

1086

What is the applet security manager, and what does it provide?

1000

what is difference betweem home interface and remote interface?

2640

what is meant by encapsulation?

1088

Objects or references which of them gets garbage collected?

971

Give a brief description of java socket programming?

970

Why null value is used in string?

1055

List the features of java programming language.

1065

What is procedure overloading?

2322

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