I need help with this question. ( operating system)

Part 1. True / False Questions (2% each 30%) 1) The OS masks the details of the system software from the programmer for using the system 2) 3 The OS can be viewed as a resource allocator Multiprogramming always involves the use of multiprocessors The program counter is a register that contains the memory address of the operand to be ) 4) loaded. 5) Cache memory is managed by the operating system. 6) Sequential process ing and parallel processing are the two main approaches to handling multiple interrupts 7) Interrupts are provided primarily as a way to improve memory utilization. 8) System calls are synchronous and interrupts are asynchronous. 9) Signal handlers reside in the user space. 10) Signals must be handled by the operating systems and cannot be ignored In a two-level memory hierarchy the hit ratio is defined as the fraction of all memory accesses found in the slower memory. 12) A micro-kernel operating system is implemented as a single process with all elements sharing the same address space. 13) Both multi-programmed batch processing and time sharing use multithreading. 14) The phrase "control is passed to a job" means that the processor is now fetching and executing instructions from the monitor program. 15) -The principle objective of time sharing is to maximize processor use