explain the life cycle of thread?

CTS, NIIT, TCS,

what is polymorphism?

Zensar,

what is mean by overriding in which situation we wil use?

Atlas Systems, CSC, DCPL,

what ide u r using and wat version, how wil u build the project etc ?

what is difference between throw and throws in exception?

Spenco,

What is difference between Iterator and for loop

HP,

what is polymorhism what is inheritance? what is Abstract n Interface? what if two interfaces have same method and a concrete class is implementing both the interfaces. Will there be a compilation error? What are mutable and immutable classes? How can u make a class mutable? when will u use dem ...explain with example? what is overriding and overloading? what is garbage collection? what is Thread? how do dey communicate? what are the different ways of implementing ? have u used any messaging technologies? what is synchronization? what are some additions in java 1.5? what are generics? whst is advanced for loop? what is finally block? can u have a try in finally? yes!! can u have a finally in finally? how do you write junits? when is a object eligible for garbage collection?explain? a = null and b has ref to a will b be eligible to be garbage collected? sql questions like diff joins? how do dey work? exception handling? what is marker interface? what is the need??

JPMorgan Chase,

Thanks A.jyotsna, Can u tell me differnce between abstract class and interface vikash

how can you retrive information from database by using hashmap/arraylist ,plz explain with example briefly?

Satyam,

how can u handle run time exception in java? explain with brief explanation with examples?

CTS,

23. Storage space in java is of the form Stack Queue Heap List 24. What is java code embedded in a web page known as Applets Servlets scriptlets snippets 25. Which of the following attributes are compulsory with an tag?. code,height & width. 26. What does 'CODEBASE' in an applet tag specify?. Files absolute path.

TCS,

2473

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What is Ideal Design of Class?

2 4940

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Need 2+ yrs experienced java techinical question papaer for company Iflex

TCS,

1 10243

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class A{ some variables; public void a()throws Excepion1,Exception2{....} } class B extends A{ variables... public void a()throws E2,E3{.....} } Qns: here override of methods occurs or not,ore else wil give any compilation error or run properly..plz tell me briefly whts happening with the above codes....

Quinnox,

4 8724

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what is difference between business delegate and data access object(dao)? in java?

1 8115

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Post New Core Java Questions

Un-Answered Questions { Core Java }

Why hashset is used in java?

1076

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What is instance example?

954

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What classes of exceptions may be thrown by a throw statement?

968

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996

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What is the difference between normal report & matrix report?

1110

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What is nullpointerexception?

1074

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Can I overload to string method

1443

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What are the four integer types supported by java?

1031

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What is nan in java?

997

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Difference between nested and inner classes ?

1133

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Class c implements interface I containing method m1 and m2 declarations. Class c has provided implementation for method m2. Can I create an object of class c?

1617

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what is the final keyword denotes in java?

1091

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What is classes in java?

942

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Can classes declared using the abstract keyword cab be instantiated?

1049

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Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2148

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