Q. Which of these class can generate an array which can increase and decrease in size automatically?

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Q. Which of these method can be used to increase the capacity of ArrayList object manually?

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Q. Which of these method of ArrayList class is used to obtain present size of an object?

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Q. Which of these methods can be used to obtain a static array from an ArrayList object?

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Q. Which of these method is used to reduce the capacity of an ArrayList object?

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Q. Map implements collection interface?

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Q. Which of the below does not implement Map interface?

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Q. What is the premise of equality for IdentityHashMap?

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Q. What happens if we put a key object in a HashMap which exists?

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Q. While finding the correct location for saving key value pair, how many times the key is hashed?

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Q. Is hashmap an ordered collection.

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Q. If two threads access the same hashmap at the same time, what would happen?

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Q. How to externally synchronize hashmap?

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Q. If large number of items are stored in hash bucket, what happens to the internal structure?

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Q. How can we remove an object from ArrayList?

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Q. How to remove duplicates from List?

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Q. How to sort elements of ArrayList?

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Q. When two threads access the same ArrayList object what is the outcome of the program?

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Q. How is Arrays.asList() different than the standard way of initialising List?

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Q. What is the difference between length() and size() of ArrayList?

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