why we import both packages java.awt.*; and java.awt.event.*; as java.awt.*; can import all classes na. then what is the need of importing java.awt.event.*; ?

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What mechanism does java use for memory management?

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Is static a keyword in java?

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What is length in java?

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Can a class be private or protected in java?

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Can we pass null as argument in java?

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What is Session and cookies?Explain in detail with an example?

4 Answers   Accenture, CTS,

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What is the purpose of a parameter?

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What about main thread in java?

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Say you want to store the information about a number of pets in an array. Typical information that you could store for each pet (where relevant) would be • Breed of animal • Animal's name • Its birth date • Its sex • Whether it has been sterilised or not • When it is due for its next inoculation • When it last had its wings clipped For each type of pet (eg. dog, cat or bird) you would typically define a class to hold the relevant data. Note: You do not need to implement these classes. Just answer the following questions. 3.1.1 What would be the advantage of creating a superclass (eg. Pet) and declaring an array of Pet objects over simply using an array of Objects, storing each of the instances of the different pet classes (eg. Dog, Cat or Bird) in it? 3.1.2 Would you define Pet as a class or as an interface? Why? (2) (2)

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Is object a data type in java?

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What is actual difference between statement,prepared statement and callable statement and when we have to use it? pls post a answer with code and clear explanation. thanks

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