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 do you make an arraylist empty in java?

923

How does remove work in java?

968

Can java list contain duplicates?

1008

Can we declare array without size in java?

1036

How do you remove duplicates from an array in java?

952

Is array size fixed in java?

975

How do you remove an object from an arraylist in java?

967

Is arraylist dynamic in java?

984

How does system arraycopy work in java?

1113

Does treeset allow null in java?

950

Is array a class in java?

971

Does java arraylist maintain insertion order?

989

Can list be null in java?

1033

Can vector have duplicates in java?

940

Is integer immutable in java?

982

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Un-Answered Questions { Core Java }

what is use of functional interface in java 8?

1010

Can the garbage collection be forced by any means?

988

Does variable declaration allocate memory?

1034

Write a function for palindrome and factorial and explain?

1075

What are void pointers?

1294

What is a generic code?

1050

What is a copy constructor in java?

1118

What are the two types of streams offered by java 8?

925

What is native method in java?

1055

What is the longest unicode character?

1147

Is string a wrapper class?

1014

What is the function of log?

988

What does %4d mean in java?

1475

What is binary search in java?

988

What is the difference between the prefix and postfix forms of the ++ operator?

1016

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