To answer this question, you need to understand the difference between direct access and sequential access.
Direct access refers to the ability to access data on a storage medium in any order, without having to sequentially read through the entire medium. It allows for random access to specific locations on the storage medium.
Sequential access, on the other hand, requires reading or writing data in a sequential manner, starting from the beginning and continuing in order until the desired data is reached. It does not allow for random access to specific locations on the storage medium.
Magnetic disks, also known as hard disk drives (HDDs), are indeed the most popular medium for both direct access and sequential access. They provide a high capacity for storing data and allow for both random and sequential access to data.
Therefore, the correct answer is C) Both of the above, as magnetic disks are commonly used for both direct access and sequential access.