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 are the differences between constructor and method of a class in Java?

1 559

How do you use final keywords and final variables in Java?

2 448

In Java, what types of classes perform inheritance?

2 416

What types of inheritance does Java support?

2 439

What is Java exception handling?

1 383

What are the differences between unchecked exception, checked exception, and errors?

2 537

What are the types of loops in Java, and how are they used?

2 401

How do you declare an infinite loop?

2 469

What is the difference between the continue and break statement?

2 435

What is the entry point in Java, and how is it written?

2 482

In Java, what are public static void main string args?

2 444

In Java, what’s the purpose of static methods and static variables?

2 506

How do you use, call, and access a static method in Java?

2 523

How do you use, call, and access a non-static method in Java?

2 482

In Java, what are this() and super(), and where are you required to use them?

2 414

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Un-Answered Questions { Core Java }

What are locale settings?

829

Why should we use singleton pattern instead of static class?

795

Differences between C and Java?

921

What are the three types of design patterns?

814

What is ctrl m character?

857

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

820

What is treeset and treemap in java?

873

What is get () in java?

847

Can we override a variable in java?

838

Can we create constructor in abstract class ?

880

What is the use of using enum to declare a constant?

853

What is treemap in java?

794

Write a program to check for a prime number in java?

867

Why object class is super class for every class in java?

877

take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero).

1838

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