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

Core Java Interview Questions

Questions Answers Views Company eMail

What do you mean by ordered and sorted in collections in java?

993

Why java is called not pure object oriented language?

1020

List some important features of java 10 release?

1078

What do you mean by garbage collection used in java?

1067

Why does java does not support multiple inheritance? Explain

972

what do you mean by marker interface in java?

983

What is difference between classpath and path variables in java?

1196

Explain the difference between jvm and jre?

1040

What do you mean by composition in java?

1024

What do you mean by inner class in java?

1086

How we can run a jar file through command prompt in java?

970

List the different types of classloaders in java.

972

What are different access specifiers in java? Explain

1125

Why we used break and continue statement in java?

1144

What is an interface in java? Explain

1193

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Un-Answered Questions { Core Java }

Define jre i.e. Java runtime environment?

1011

When is finally block not called?

1093

Is vector thread safe in java?

1054

Can a constructor call the constructor of parent class?

1042

What is the main advantage of passing argument by reference?

991

Explain the importance of throws keyword in java?

999

What is __ init __ functions?

1126

What is the java idl system?

1042

Do extraneous variables affect validity?

913

Can we pass null as argument in java?

950

Explain the features of interfaces in java?

982

Is call by reference possible in java?

964

Why is stringbuffer called mutable?

994

Explain the importance of import keyword in java?

1012

What are the principle concepts of oops?

960

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