FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -job control is not included in basic functions of operating system. we can use job scheduling, memory management and data management. operating systems help people interface with computers and provide network. job control is not a function opearting systemcapabilities.

Detailed explanation-2: -Fragmentation refers to an unwanted problem that occurs in the OS in which a process is unloaded and loaded from memory, and the free memory space gets fragmented. The processes can not be assigned to the memory blocks because of their small size. Thus the memory blocks always stay unused.

Detailed explanation-3: -Paging, and swapping, segmentation and compaction are modern computers’ four main memory management techniques. Swapping is the best technique for memory management because it provides the most efficient use of system resources.

Detailed explanation-4: -Virus protection is the function of Firewall and Antivirus. Hence, it is not the function of an operating system. So, the correct answer is option (b).