To answer this question, we need to understand the concept of NOINHIBITSOURCE and the different modes of dataset access.
NOINHIBITSOURCE is a parameter used in mainframe systems to determine whether or not the source dataset can be updated after it is accessed. It is used in conjunction with the dataset access modes, which are as follows:
A. Write only Mode - This mode allows only write operations to the dataset. It means that you can only write or modify the contents of the dataset, but you cannot read or retrieve any data from it.
B. Read only Mode - This mode allows only read operations on the dataset. It means that you can only retrieve or access the data in the dataset, but you cannot modify or write any new data to it.
C. Read Write Mode - This mode allows both read and write operations on the dataset. It means that you can both retrieve and modify the data in the dataset.
D. All of the above - This option indicates that all the mentioned modes (Write only, Read only, and Read Write) are allowed with the NOINHIBITSOURCE parameter.
Based on the given correct answer, B) Read only mode is the correct option. NOINHIBITSOURCE allows the source dataset to be updated after accessing it in read-only mode. This means that you can retrieve data from the dataset, but you cannot modify or write any new data to it.
Therefore, the correct answer is B) Read only Mode.