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

Core Java Interview Questions

Questions Answers Views Company eMail

How to count occurrences of each duplicate element in a list {a,b,d,c,a,b} ? Thanks in Advance

TCS,

2 8465

What is meant by wrapper classes?

3 9252

how to get the max salary and name of employee from arraylist without using the Comperator or even Comparable interface?

2 27549

how can i take the inputs from users in java program?

Wipro,

7 11687

HOW TO PRINT A NO IN WORDS USING WHILE LOOP THE NO WILL BE PRINTED WHEN IT WILL BE IN THE RANGE BETWEEN 1 AND 3?

1 3902

hoe can u call a constructor of a private classs to other inherited claa??

1 3932

how can be object class inherited to all class in a program when java does not support multiple inheritance??

4 6499

can two class in a code be public??if yes then how??

2 4983

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).

2046

Is there memory leaks in java?

3 6009

Need to use public,static keywords in main function?

5 7442

How core java/j2ee project performance can be measured ?

1 3926

If there are two notepad opened and working on it . is this a process or thread? computer based Live Example to differentiate between Thread , Process , and Multi tasking ?

TCS, Wipro,

3 7779

How Marker Interfaces are instruct to complete the desired need ?

2 4330

Matrix multiplication only using OOP concepts .

3985

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Un-Answered Questions { Core Java }

Write a function for palindrome and factorial and explain?

1141

what is mena by object block any what is the use of that

2264

Write a program to print fibonacci series

1242

What are the advantages of java over cpp?

1128

What is the finalize method do?

1157

What is a JAR file?

1107

Is void a return type?

1021

Explain public static void main(string args[]).

1243

How many functional interfaces does java 8 have?

1082

Why webdriver is an interface?

1093

Give few difference between constructor and method?

1027

How do you create immutable object in java?

1106

What is the difference between size and length in java?

1026

What is equals method in java?

1105

Why are arrays useful in java?

1080

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