Answer Posted / dinesha kumar bhoi

java does not support multiple inheritance

How do you add an element to an arraylist in java?

995

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How many arguments can a method have java?

1068

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Can set contain duplicates?

1047

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Will set allow duplicates in java?

1027

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What is difference between printf and scanf?

1227

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What is java regex?

1058

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How do you square a number in java?

1103

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What is the difference between abstract classes and interfaces?

1083

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When parseint method can be used?

987

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Difference between stack and queue?

1139

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Explain why wait(), notify() and notifyall() methods are in object class rather than in the reading class?

1028

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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)

1867

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Is string an object?

1169

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What do you mean by global variable?

998

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How does list work in java?

967

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