To answer this question, you need to understand the concept of CISZ (Control Interval Size) and its relationship with random and sequential processing.
Option A) (1) Smaller CISZ results in faster retrieval for random processing - This option is correct. In random processing, smaller CISZ allows for faster retrieval because it reduces the amount of data that needs to be read to locate a specific record.
Option B) (2) Larger CISZ results in faster retrieval for sequential processing - This option is correct. In sequential processing, larger CISZ results in faster retrieval because it reduces the number of control intervals that need to be accessed, improving the efficiency of reading records sequentially.
Option C) (3) CISZ stands for Control interval size - This option is correct. CISZ stands for Control Interval Size, which refers to the number of records stored in a control interval in a direct access storage device.
Option D) (4) CISZ should be constant for sequential files - This option is incorrect. CISZ can vary for sequential files. It is generally recommended to have a constant CISZ for random processing to optimize retrieval speed, but for sequential processing, the CISZ can be varied based on factors such as the size of the records and the specific requirements of the application.
The correct answer is D) (4) CISZ should be constant for sequential files. This option is false because CISZ can vary for sequential files.