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Java Interview Questions and Answers

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Questions Question: What significance of protected Constructors?
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Questions Question: What is the difference between a CallableStatement and PreparedStatement?
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Questions Question: What is a tagged interface?
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Questions Question: What is difference between runnable and thread ? why we use static class
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Questions Question: What is the difference b/w Iterator & ListIterator ?
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Questions Question: What method should the key class of hashmap override ?
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Questions Question: How and when to prevent inheritance?
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Questions Question: What is the difference between java and core java
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Questions Question: Differences between servlet context and servlet config?
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Questions Question: Why java is not 100% object oriented language??
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Questions Question: What is root class of all java classes ?
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Questions Question: Why java dosen\'t support pointers?
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Questions Question: What is the difference between java and c and c++?
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Questions Question: What is a Singleton class, what is it\'s significance?
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Questions Question: What is the datatypes in java?
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Questions Question: How can we inherit the two independent classes in one class? for example, we have two independent classes like Class A and B. I want to inherit the methods of Class A and B.
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Questions Question: Why java shouldbe preferred,when we can get the sameoutput using VB orany otherlanguages. Howcan we convincethe interviewer ,other than givingthe simple features ofjava. could anyone pls answer this question?
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Questions Question: Why we cannot define constructor of super class in a sub class ?
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Questions Question: In client-server approach, how to get an IP address of remote machine, and how we can find whether tht machine is connected with server or not. I hv found one solution is pinging in background, but how we can do such pinging? how can we find out tht we r getting reply of ping?
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Questions Question: let say there are two interfaces like the following interface int1{ int meth1(); } interface int22{ int meth1(); } ok then i am implementing both of them in a calss as follows class mycl implements int1,int2 {} now as the rule says, if a class implements an interface it must complete its signature. now my questions is that if i define meth1(), as that method is in both interface, may i know how can i define both of that methods. please answer me
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Latest 10 Answers
When there is any situation that u should attach a new patch to ur kernel , then download the patch and install it,to make changes to kernel , go to ok prompt and type boot -r, it will update or reconfigure the kernel
Honesty, helpful and reliable
procedure is a set of sql statement ,are combined to gether to perform a specific task or to solve a specifi problem.it does not return value.
leadership is power to influence a group so that the members willingly exert efforts as aspired by the leader.
I have the unique combination of technical skill and the ability to build strong customer relationship. I have the ability to stay focussed in stressfull situation. I would be great addition to your team.
first execute the bc search spec to fetch the data then executes the applet search spec if applet search spec is not match with bc it skips
TCP-Transmission Control Protocol. TCP is Reliable. TCP is Connection oriented. UDP-User Datagram Protoco UDP is Unreliable. UDP is Connectionless.
By default in structure all data member and member function are public,i,e if you not mentation any access specifier. But in case of class By default all data member and member function are private.
Structure is a user defined data type. By default all structure variables are public type and we cann't use access specifier in structure type variable, where as in class we can define objects(variables) under required access specifier type.
variable cost is the cost which is not fixed in nature

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