Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Prepare for your Java exam with our ultimate quiz based on 'Thinking in Java'. Engage with expertly crafted questions that enhance your learning process. Perfect for Java enthusiasts looking to solidify their knowledge!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Does MapEntry use the key’s hashCode() for hashing?

Yes
No
Only if the key is a String
Only for null keys

The correct answer is: Yes

MapEntry does use the key's hashCode() method for hashing as it is used to determine the index in the hash table where the key-value pair will be stored. Option B is incorrect because if the hash code is not used for hashing, then the key-value pair will be stored in a default index, which can result in slower retrieval time. Option C is incorrect because it implies that only String keys use the hashCode() method, which is not true as any object can override this method. Option D is incorrect because the hashCode() method is used for all keys, including null keys.