A staple in senior data engineer interview questions and answers, be prepared to answer this one using your hands-on experience. In Hadoop, HDFS abbreviated as Hadoop distributed file system is considered as the standard storage mechanism. It is built with the help of commodity hardware. As we all know that till now, Hadoop does not require a costly server with high processing power and bigger storage, we can use inexpensive systems with average processor and RAM. These systems are called as commodity hardware. These are affordable, easy to obtain and compatibles with various operating systems like Linux, Windows and MS-DOS without any requirement of any special type of devices or equipment. Another benefit of using commodity hardware is its scalability.