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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain parallel processing in java8?

1170

Explain the difference between map and flatmap stream operation?

1209

Write a program to print 15 random numbers using foreach of java 8?

898

Explain the difference between intermediate and terminal operations in java8?

1059

Write a program to print count of empty strings in java 8?

947

Explain spliterator in java8?

1014

Explain the difference between collection api and stream api in java8?

928

How to create a base64 decoder in java8?

1012

What is the difference between array and array list in java?

1159

What is the difference between hashmap and hashtable in java?

1061

What is the difference between hashset and treeset in java?

1018

What is the base class of all exception classes?

1030

What's the default access specifier for variables and methods of a class?

1066

How can we make copy of a java object?

1086

What's the base class in java from which all classes are derived?

1220

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Un-Answered Questions { Core Java }

What happens if we override private method?

922

Can classes declared using the abstract keyword cab be instantiated?

1015

Is void a data type in java?

934

Why does java does not support multiple inheritance? Explain

935

What is the difference between variable & constant?

973

How to make a write-only class in java?

1022

Explain about interrupt() method of thread class ?

1074

What do you understand by Header linked List?

1044

What is the use of StringTokenizer class?

1029

What is navigable map in java?

946

What is anonymous inner class?

1032

How do you remove duplicates from an array in java?

912

What is the final keyword denotes?

1065

define the terminology association.

1058

What is the collections api?

1002

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