The database operations in a MapReduce system are slow as the system keeps the data in ________.
A) magnetic tapes
B) temporary memory
C) secondary storage
D) main memory

Question

Quizplus · Accepted Answer

MapReduce systems keep the data in secondary storage (such as hard disk drives) which tends to be slower than main memory. This is because accessing data from secondary storage involves moving physical read/write heads to the appropriate location, whereas accessing data from main memory is much faster as it doesn't require any physical movement. Therefore, database operations in a MapReduce system tend to be slower due to the slower access times of secondary storage.

The Database Operations in a MapReduce System Are Slow as the System