The correct answer is (b), Spooling.
Spooling is the process of storing data temporarily in a disk file so that it can be processed later. This is often used for input and output devices that are slower than the CPU, such as printers and tape drives. Spooling allows the CPU to continue processing other tasks while the data is being transferred to or from the device.
Daemon is a program that runs in the background and performs a specific task. Daemons are typically not interactive and do not have a user interface. They are often used to manage system resources, such as printers and file systems.
Interleaving is a technique used to improve the performance of a computer system by overlapping the execution of instructions from different programs. This can be done by dividing the memory into two or more banks and switching between them as needed. Interleaving can also be used to improve the performance of input and output devices by overlapping the transfer of data from multiple devices.
None of these is the correct answer.