How many types of gc are there in java?
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What is pangram in java?
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)
What do you mean by platform independence? What is an interface?
how you will prevent method overriding?
In Java why we write public static void main(String args[]) why not main()?
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Describe the process as to how substring() methodology mechanisms in java.
When do we need to use internal iteration? When do we need to use external iteration?
Can a source file contain more than one class declaration?
What is a numeric format?
Can a singleton class be inherited?
Tell us something about an iterator.
Are nested try statements are possible?
Core Java 
