HashMap is a collection type in Java that stores data in key-value pairs. Here are the truths about HashMap:

1. Can Contain Duplicate Values: Yes, HashMap can contain duplicate values. Multiple keys can hold the same value.

2. Checking Existing Values: When a value is added to HashMap, it does not check whether the same value already exists or not. However, it does check whether the same key exists or not. If the same key exists, the old value under that key is replaced by the new value.

3. Use of Index Values: HashMap does not use index values to track data. It uses a hashing technique where data is stored according to the hash function of the key.

4. Use of Key-Value Pairs: Yes, HashMap uses key-value pairs to store and track data. Each key is associated with a single value, and each key is unique.

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HashMap is a collection type in Java that stores data in key-value pairs. Here are the truths about HashMap:

1. Can Contain Duplicate Values: Yes, HashMap can contain duplicate values. Multiple keys can hold the same value.

2. Checking Existing Values: When a value is added to HashMap, it does not check whether the same value already exists or not. However, it does check whether the same key exists or not. If the same key exists, the old value under that key is replaced by the new value.

3. Use of Index Values: HashMap does not use index values to track data. It uses a hashing technique where data is stored according to the hash function of the key.

4. Use of Key-Value Pairs: Yes, HashMap uses key-value pairs to store and track data. Each key is associated with a single value, and each key is unique.

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HashMap is a collection type in Java that stores data in key-value pairs. Here are the truths about HashMap:

1. Can Contain Duplicate Values: Yes, HashMap can contain duplicate values. Multiple keys can hold the same value.

2. Checking Existing Values: When a value is added to HashMap, it does not check whether the same value already exists or not. However, it does check whether the same key exists or not. If the same key exists, the old value under that key is replaced by the new value.

3. Use of Index Values: HashMap does not use index values to track data. It uses a hashing technique where data is stored according to the hash function of the key.

4. Use of Key-Value Pairs: Yes, HashMap uses key-value pairs to store and track data. Each key is associated with a single value, and each key is unique.

What is true about HashMap as a collection type?This collection type can contain duplicate values.If a value is added to this collection type that exists, it will not be checked first.This collection type uses index values to track data.This collection type uses key-value pairs to track data.

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