MCQ 1 To access the services of operating system, the interface is provided by the

(A) System calls (B) API (C) Library (D) Assembly instructions

MCQ 2 Which one of the following error will be handle by the operating system?

(A) Power failure (B) Lack of paper in printer (C) Connection failure in the network (D) All of the above

MCQ 3 By operating system, the resource management can be done via __________.

(A) time division multiplexing (B) space division multiplexing (C) time and space division multiplexing (D) None of the above

MCQ 4 Which facility dynamically adds probes to a running system, both in user processes and in the kernel?

(A) DTrace (B) DLocate (C) DMap (D) DAdd

MCQ 5 The OS X has ____________.

(A) monolithic kernel (B) hybrid kernel (C) microkernel (D) monolithic kernel with modules

MCQ 6 In Unix, Which system call creates the new process?

(A) Fork (B) Create (C) New (D) None of the above

MCQ 7 What is the ready state of a process?

(A) When process is scheduled to run after some execution. (B) When process is unable to run until some task has been completed. (C) When process is using the CPU. (D) None of the above

MCQ 8 A set of processes is deadlock if ____________.

(A) each process is blocked and will remain so forever (B) each process is terminated (C) all processes are trying to kill each other (D) None of the above

MCQ 9 Which system call returns the process identifier of a terminated child?

(A) wait (B) exit (C) fork (D) get

MCQ 10 A Process Control Block(PCB) does not contain which of the following?

(A) Code (B) Stack (C) Bootstrap program (D) Data

MCQ 11 The state of a process is defined by __________.

(A) the final activity of the process (B) the activity just executed by the process (C) the activity to next be executed by the process (D) the current activity of the process

MCQ 12 What is a Process Control Block?

(A) Process type variable (B) Data Structure (C) A secondary storage section (D) A Block in memory

MCQ 13 What will happen when a process terminates?

(A) It is removed from all queues (B) It is removed from all, but the job queue (C) Its process control block is de-allocated (D) Its process control block is never de-allocated

MCQ 14 What is a medium-term scheduler?

(A) It selects which process has to be brought into the ready queue (B) It selects which process has to be executed next and allocates CPU (C) It selects which process to remove from memory by swapping (D) None of the above

MCQ 15 The only state transition that is initiated by the user process itself is ____________.

(A) block (B) wakeup (C) dispatch (D) None of the above

MCQ 16 In UNIX, each process is identified by its __________.

(A) Process Control Block (B) Device Queue (C) Process Identifier (D) None of the above

MCQ 17 Which module gives control of the CPU to the process selected by the short-term scheduler?

(A) Dispatcher (B) Interrupt (C) Scheduler (D) None of the above

MCQ 18 Which of the following condition is required for a deadlock to be possible?

(A) Mutual exclusion (B) A process may hold allocated resources while awaiting assignment of other resources (C) No resource can be forcibly removed from a process holding it (D) All of the above

MCQ 19 The ___________ must design and program the overlay structure.

(A) programmer (B) system architect (C) system designer (D) None of the above

MCQ 20 CPU fetches the instruction from memory according to the value of ____________.

(A) program counter (B) status register (C) instruction register (D) program status word

MCQ 21 Which one of the following is the address generated by CPU?

(A) physical address (B) logical address (C) none of the mentioned (D) absolute address

MCQ 22 Program always deals with ____________.

(A) logical address (B) absolute address (C) physical address (D) relative address

MCQ 23 ____________ is a unique tag, usually a number identifies the file within the file system.

(A) File identifier (B) File name (C) File type (D) None of the above

MCQ 24 Which file is a sequence of bytes organized into blocks understandable by the system’s linker.

(A) object file (B) source file (C) executable file (D) text file

MCQ 25 Mapping of file is managed by ____________.

(A) file metadata (B) page table (C) virtual memory (D) file system