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

Core Java Interview Questions

Questions Answers Views Company eMail

Describe the process as to how substring() methodology mechanisms in java.

1144

What technique is carried out to find out if a particular string is empty?

1032

What do you understand by the term wrapper classes?

1019

define the terminology association.

1114

Is it possible to compare various strings with the help of == operator?

1010

Are static members inherited to sub classes?

1155

What is multi level inheritance in java?

1040

Can string be considered as a keyword?

1052

what do you understand by the term string with respect to java?

1054

Describe the various concepts related to object oriented programming (oop).

1045

Why char array is favored over string for the storage of passwords?

1099

List some important characteristics on jre

1084

Differentiate between vector and array list.

1076

Explain abstract class in java?

1081

What are some characteristics of interference class?

1013

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Un-Answered Questions { Core Java }

What is the size of int in 64-bit jvm?

1114

Can we declare an interface as final?

1080

What is the difference between the reader/writer class hierarchy and the inputstream/outputstream class hierarchy in java programming?

1140

What is a loop java?

1072

What is the benefit of lambda expressions?

1084

Define linked list and its features with signature?

1014

Write java program to reverse string without using api?

1080

Why is method overloading not possible by changing the return type in java?

1015

What is purpose of applet programming?

1202

Can inner class extend any class?

1071

How to change value in arraylist java?

1195

When does a class need a virtual destructor?

1030

What is a return in java?

1037

String class is defined under which package in java?

1096

What is == in java?

1031

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