Please solve all questions

Please solve all questions

1. A Control/Status register that contains the address of the next instruction to be fetched is called the 2. Instruction Register (IR) b. Program Counter (PC) c. Program Status Word (PSW) d. All of the above 2 When an external device becomes ready to be serviced by the processor, the device sends this type of signal to the processor: a. Interrupt signal b. Halt signal e. Handler signal d. None of the above 3. Direct Memory Access (DMA) operations require the following information from the processort 1. Address of 1/0 device b. Starting memory location to read from or write to c. Number of words to be read or written d. All of the above 4. A technique in which a process, executing an application, is divided into thrends that ca nun concurrently is called: a. Multithreading b. Multiprocessing c Symmetric multiprocessing (SMP) a. None of the above S. POSIX supports several types of os, including: & WIN32 b. MAC OSX c. Java Virtual Machines (JVM) d. Windows phone 6. The basic Process possible states for a process before processor termination a Running and Executing b. Running, waiting and ready Running and Not Running d. Executing and Waiting 7. There are a number of conditions that can lead to process termination, including: 1/O requirement b. Child process creation Parent Termination d. All of the above 8. In the Five-State Process Model, the following represents a valid state transition: 0. Running -> Waiting h Ready Terminated a Waiting New d. Waiting Terminated 9. A Memory during Process execution that hold processes just before entering the CPU is: a: 1/0 queue b. Ready queue c. Interrupt queue d. None of the above 10. The Process Data element that contains the collection of Attributes needed by the OS to control a particular process is called the a. User Data b. System Stack c. Process Control Block d. None of the above that 11. The following graph inverts: 1. Two-level Model b. Many-to-One c. One-to-One d. Many-to-Many 12. The is the portion of the operating system that remains in main memory during system operation a dispatcher b. Kernal c. forko d. Multiprocessors 13. In an executing system, a process that has been swapped out of CPU and not into any other queue is in the Process stete a. Terminated b. Wating c. Ready d. hold 14. selects which process should be executed next and allocates CPU. Sometimes the only scheduler in a system a Long-term scheduler b. Short-term scheduler e job scheduler di computer scheduler 15. Process creation in a typical UNIX system is made by means of a kemel system call named a Exec() b. Fino e Load) d Fork) 16. One of the following is a true facts about Dend-Lock: a. If graph contains no cycles > no deadlock b. If graph contains a cycle deadlock c. If multiple instance per resource type and cyclic = deadlock d. If several instances per resource type and not cyclic = No deadlock 17. exploits the principle of locality by providing a small fast memory between the processor and main memory. a. Saving b. Cashing c. Multiprocessors d. Dispatcher 18. Deadlock con arise it four conditions hold simultaneously, except a. Mutual exclusion b. Hold and wait c. Shortest Job First d. Circular wait 19. One of the following is not included in the Resource Allocation Graph: Vertices b. request edge c backward edge d. assignment edge 20. One of the following Resource Allocation Graphs may include a Dead-Lock: b