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 8344

What is meant by wrapper classes?

3 9075

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

2 27429

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

Wipro,

7 11405

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 3808

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

1 3843

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

4 6339

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

2 4872

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).

1978

Is there memory leaks in java?

3 5877

Need to use public,static keywords in main function?

5 7235

How core java/j2ee project performance can be measured ?

1 3834

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 7602

How Marker Interfaces are instruct to complete the desired need ?

2 4203

Matrix multiplication only using OOP concepts .

3926

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Un-Answered Questions { Core Java }

Will the compiler creates a default constructor if I have a parameterized constructor in the class?

1108

Why collection doesn’t extend cloneable and serializable interfaces?

1101

why not override thread to make a runnable? : Java thread

996

How to compare two strings in java program?

1047

Can we access instance variables within static methods ?

1090

Is boolean a wrapper class in java?

1051

Is an empty arraylist null?

1089

What are the advantages of assembly language?

928

What is difference between == and === in js?

1007

What is thread safe java?

914

What is double parsedouble in java?

1045

how to create constants in java?

1078

Can a class have multiple superclasses?

1156

What are exceptions

1096

Will minecraft java be discontinued?

1162

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