Operating System MCQs > FREE SET - 3

	1. Which of the following instruction steps, would be written within the diamond-shaped box, of a flowchart?
	A S = B - C B IS A<10 C PRINT A D DATA X,4Z Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	2. In virtual memory systems, Dynamic address translation
	A is the hardware necessary to implement paging B stores pages at a specific location on disk C is useless when swapping is used D is part of the operating system paging algorithm Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	3. The CPU, after receiving an interrupt from an I/O device
	A halts for a predetermined time B hands over control of address bus and data bus to the interrupting device C branches off to the interrupt service routine immediately D branches off to the interrupt service routine after completion of the current instruction Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	4. With MS-DOS which command will divide the surface of the blank floppy disk into sectors and assign a unique address to each one?
	A FORMAT command B FAT command C VER command D CHKDSK command Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	5. In analyzing the compilation of PL/I program, the description "creation of more optimal matrix" is associated with
	A Assembly and output B Code generation C Syntax analysis D Machine independent optimization Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	6. Under virtual storage,
	A a single program is processed by two or more CPUs B two or more programs are stored concurrently in primary storage C only the active pages of a program are stored in primary storage D interprogram interference may occur Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	7. In a magnetic disk, data is recorded in a set of concentric tracks which are subdivided into
	A periods B sectors C zones D groups Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	8. The strategy of allowing processes that are logically runnable to be temporarily suspended is called
	A preemptive scheduling B non preemptive scheduling C shortest job first D first come first served Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	9. Resolution of externally defined symbols is performed by
	A Linker B Loader C Compiler D Assembler Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	10. Page stealing
	A is a sign of an efficient system B is taking page frames from other working sets C should be the tuning goal D is taking larger disk spaces for pages paged out Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	11. Seeks analysis
	A is used for analyzing paging problems B is used for analyzing device busy problems C is used for analyzing control-unit busy problems D is only shown on real-time displays Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	12. A Processor
	A is a device that performs a sequence of operations specified by instructions in memory. B is the device where information is stored C is a sequence of instructions D is typically characterized by interactive processing and time of the CPU's time to allow quick response to each user. Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	13. The problem of thrashing is affected significantly by:
	A program structure B program size C primary-storage size D all of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	14. Semaphores
	A synchronize critical resources to prevent deadlock B synchronize critical resources to prevent contention C are used to do I/O D are used for memory management Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	15. A partitioned data set is most used for
	A a program or source library B storing program data C storing backup information D storing ISAM files Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	16. In which addressing mode the operand is given explicitly in the instruction?
	A absolute mode B immediate mode C indirect mode D index mode Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	17. All the time a computer is switched on, its operating system software has to stay in
	A main storage B primary storage C floppy disk D disk drive Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	18. Access time is the highest in the case of
	A floppy disk B cache C swapping devices D magnetic disk Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

19. The instruction register

A is a hardware memory device which denotes the location of the current instruction being executed. B is a group of electrical circuits that performs the intent of instructions fetched from memory. C contains the address of the memory location that is to be read from or stored into. D contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write". Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	20. Which policy replace a page if it is not in the favoured subset of a process's pages?
	A FIFO B LRU C LFU D Working set Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	21. The most common security failure is
	A carelessness by users B depending on passwords C too much emphasis on preventing physical access D insufficient technology used to prevent breaches Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

22. Terminal Table

A contains all constants in the program B a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure. C consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation D a permanent table which lists all key words and special symbols of the language in symbolic form. Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	23. The working set theory of programming behaviour of processes running within an operating system involves
	A the collection of pages that a process accesses B disk scheduling mechanisms C coalescing holes in memory D assigning the CPU to processes Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	24. Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and
	A hold and wait B deadlock avoidance C race around condition D buffer overflow Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	25. File record length
	A should always be fixed B Should always be variable C depends upon the size of the file D should be chosen to match the data characteristics Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	26. Which of the following statement is true.
	A The LRU algorithm pages out pages that have been used recently B Thrashing is a natural consequence of virtual memory systems. C Seek analysis is used for analysing control-unit busy problems. D All of the above Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	27. A sequence of instructions, in a computer language, to get the desired result, is known as
	A Algorithm B Decision Table C Program D All of the above Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	28. Supervisor state is
	A never used B entered by programs when they enter the processor C required to perform any I/O D only allowed to the operating system Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	29. A page fault
	A is an error is a specific page B occurs when a program accesses a page of memory C is an access to a page not currently in memory D is a reference to a page belonging to another program Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	30. A translator is best described as
	A an application software B a system software C a hardware component D all of the above Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	31. What is the name given to all the programs inside the computer with makes it usable?
	A Application software B System software C Firm ware D Shareware Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	32. The technique, for sharing the time of a computer among several jobs. Which switches jobs so rapidly such that each job appears to have the computer to itself:
	A time sharing B time out C time domain D FIFO Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	33. Part of a program where the shared memory is accessed and which should be executed invisibly, is called
	A semaphores B directory C critical section D mutual exclusion Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	34. Two basic types of operating systems are:
	A sequential and direct B batch and timesharing C sequential and realtime D batch and interactive Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	35. In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of register?
	A absolute mode B indirect mode C immediate mode D index mode Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	36. User-Friendly Systems are:
	A required for object-oriented programming B easy to develop C common among traditional mainframe operating systems D becoming more common Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	37. In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?
	A MS B DOS C MS DOS D 5.0 Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	38. Which of the following is helpful in evaluating applications software what will best suit your needs?
	A recommendations by other users B computer magazines C objective software reviews D all of the above Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	39. The computational technique used to compute the disk storage address of individual records is called:
	A bubble memory B key fielding C dynamic reallocation D hashing Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	40. A form of code that uses more than one process and processor, possibly of different type, and that may on occasions have more than one process or processor active at the same time, is known as
	A multiprogramming B multi threading C broadcasting D time sharing Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	41. Which of the following filename extension suggests that the file is a backup copy of another file?
	A TXT B COM C BAS D BAK Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	42. The principal of locality of reference justifies the use of
	A reenterable B non reusable C virtual memory D cache memory Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	43. System programs such as Compilers are designed so that they are
	A reenterable B non reusable C serially usable D recursive Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

---

	44. When a computer is first turned on or restarted, a special type of absolute loader is executed, called a
	A "Compile and Go" loader B Boot loader C Bootstrap loader D Relating loader Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	45. Which of the following is not an advantage of multiprogramming?
	A increased throughput B shorter response time C decreased operating-system overhead D ability to assign priorities to jobs Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	46. In analyzing the compilation of PL/I program, the term "Machine independent optimization" is associated with
	A recognition of basic syntactic constructs through reductions. B recognition of basic elements and creation of uniform symbols. C creation of more optional matrix. D use of macro processor to produce more optimal assembly code Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	47. What is the name given to the software which can be legally compiled and often used for free?
	A Shareware program B Public domain program C Firmware program D Mindware Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

---

	48. Which of the following is characteristic of an operating system?
	A resource management B error recovery C memory management D All the above Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

	49. What is the name of the operating system that reads and reacts in terms of actual time.
	A Batch system B Quick response system C Real time system D Time sharing system Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

---

	50. A task in a blocked state
	A is executable B is running C must still be placed in the run queues D is waiting for same temporarily unavailable resources Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

---

---