Name a technique which is emplyed for the decoration as well as protection of a metallic object .

Explanation

**Step-by-Step Solution:**

1. **Identify the Technique**: The technique employed for the decoration and protection of metallic objects is called **electroplating**.

2. **Understanding Electroplating**: Electroplating is a process where a thin layer of one metal is deposited onto another metal using the method of electrolysis. This is done to enhance the appearance of the object and to protect it from corrosion.

3. **Noble Metals**: In electroplating, noble metals such as gold, silver, or platinum are often used for the plating process. These metals do not easily react with the atmosphere or moisture, making them ideal for protecting the underlying metal.

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