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

Core Java Interview Questions

Questions Answers Views Company eMail

Difference between Array and vector?

9 29905

What is the difference between C++ & Java?

College School Exams Tests, HAL, SUN, Syntel, TCS, Wipro,

78 179686

Differences between GridLayout and GridBagLayout?

1 21517

What is the difference between Integer and int?

Infosys,

10 30226

Difference between Reader/Writer and InputStream/Output Stream?

Adobe, Kirusa, Verizon,

9 64532

Difference between String and String Buffer?

3 8602

What is the difference between Trusted and Untrusted Applet ?

IBM,

2 11427

Difference between a Canvas and a Scroll Pane?.

NIIT,

1 5160

Difference between Choice and a List?

1 20080

Difference between a MenuItem and a CheckboxMenuItem?

1 9014

What are concepts of OOPS and how are they implemented in Java?

KPIT,

2 8335

What are different types of Exceptions?.

9 38117

What are hot spots in Java programming?

1 6836

What are interfaces?

3 5177

What are invisible components?.

2156

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Un-Answered Questions { Core Java }

What does || mean in code?

1056

What are the two main uses of volatile in Java?

1070

Which object oriented concept is achieved by using overloading and overriding?

1131

Whats the difference between notify() and notifyall()?

1051

How to convert string to byte array and vice versa?

1109

How do weakhashmap works?

1168

Why do we need autoboxing in java?

1015

What is int short for?

1062

What is meant by main method?

1078

Where is stringbuffer stored?

999

What are data types in programming?

1004

What are the rules for variable declaration?

985

Define an applet in java?

1173

What is difference between array and arraylist in java?

1010

Explain the purpose of garbage collection in Java?

1036

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