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!

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What effect does a good hash function have?

It guarantees no collisions
It speeds up data retrieval
It decreases memory usage
It simplifies the code

The correct answer is: It speeds up data retrieval

A good hash function speeds up data retrieval by ensuring that data items are assigned to unique locations in a hash table, thereby eliminating the need for linear search. Option A is incorrect because even with a good hash function, collisions can still occur. Option C is incorrect because a good hash function does not necessarily decrease memory usage, as the hash table still needs to store the same amount of data. Option D is incorrect because a good hash function does not necessarily simplify the code, as it may still require complex algorithms and logic.