Operating System MCQs > FREE SET - 4

	1. Information in a memory that is no longer valid or wanted is known as
	A non-volatile B volatile C surplus D garbage Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	2. A system program that combines the separately compiled modules of a program into a form suitable for execution
	A assembler B linking loader C cross compiler D load and go Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	3. Which of the following addressing modes, facilitates access to an operand whose location is defined relative to the beginning of the data structure in which it appears?
	A ascending B sorting C index D indirect Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	4. While running DOS on a PC, which command would be used to duplicate the entire diskette?
	A COPY B DISKCOPY C CHKDSK D TYPE Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	5. Which of the following are loaded into main memory when the computer is booted?
	A internal command instructions B external command instructions C utility programs D word processing instructions Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	6. Thrashing can be avoided if
	A the pages, belonging to the working set of the programs, are in main memory B the speed of CPU is increased C the speed of I/O processor is increased D all of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	7. Which of the following are Language Processor
	A assembles B compilers C interpreters D All of the above Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	8. What is the name of the operating system for the laptop computer called MacLite?
	A Windows B DOS C MS-DOS D OZ Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	9. Memory management is :
	A not used in modern operating system B replaced with virtual memory on current systems C not used on multiprogramming systems D critical for even the simplest operating systems Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	10. Which of the following is false about disk when compared to main memory?
	A non-volatile B longer storage capacity C lower price per bit D faster Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	11. The details of all external symbols and relocation formation (relocation list or map) is provided to linker by
	A Macro processor B Translator C Loader D Editor Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	12. Data encryption
	A is mostly used by public networks B is mostly used by financial networks C cannot be used by private installations D is not necessary, since data cannot be intercepted Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	13. Which of the following is a block device
	A mouse B printer C terminals D disk Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	14. The file structure that redefines its first record at a base of zero uses the term:
	A relative organization B key fielding C dynamic reallocation D hashing Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	15. Scissoring enables
	A a part of data to be displayed B entire data to be displayed C full data display on full area of screen D no data to be displayed Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	16. In MS-DOS, re-locatable object files and load modules have extensions
	A .OBJ and .COM or .EXE, respectively B .COM and .OBJ, respectively C .EXE and .OBJ, respectively D .DAS and .EXE, respectively Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	17. Link encryption
	A is more secure than end-to-end encryption B is less secure than end-to-end encryption C can not be used in a public network D is used only to debug Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	18. Which of the following is true about pseudocode
	A A machine language B An assembly language C A high-level language D None of the above Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	19. Which of the following is a measure to test how good or bad a modular design is
	A Module strength B Module coupling C Static analysis D All of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	20. Which of following is the advantage of modular programming?
	A The program is much easier to change B Modules can be reused in other programs C Easy debugging D Easy to compile Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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21. Which of the following is true for testing and debugging?

A Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program B Testing detects the syntax errors in the program while debugging corrects those errors in the program C Testing and debugging indicate the same thing D All of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	22. Under multiprogramming, turnaround time for short jobs is usually _____ and that for long jobs is slightly _____.
	A lengthened; shortened B shortened; lengthened C shortened; shortened D lengthened; lengthened Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	23. Indicate which is a pre-emptive scheduling algorithm
	A Round-robin B Shortest-job-next C Priority-based D All of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	24. The term "operating system" means
	A a set of programs which controls computer working B the way a computer operator works C conversion of high level language into machine code D the way a floppy disk drive operates Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	25. Process is
	A program in High level language kept on disk B contents of main memory C a program in execution D a job in secondary memory Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	26. The LRU algorithm
	A pages out pages that have been used recently B pages out pages that have not been used recently C pages out pages that have been least used recently D pages out the first page in a given area Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	27. Thrashing
	A is a natural consequence of virtual memory systems B can always be avoided by swapping C always occurs on large computers D can be caused by poor paging algorithms Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	28. The FIFO algorithm
	A executes first the job that last entered the queue B executes first the job that first entered the queue C execute first the job that has been in the queue the longest D executes first the job with the least processor needs Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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29. Assembly code data base is associated with

A assembly language version of the program which is created by the code generation phase and is input to the assembly phase. 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 or 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 A Explanation: Available Soon. Workspace View Answer Workspace

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	30. A non-re-locatable program is one which
	A cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation. B consists of a program and relevant information for its relocation. C can itself performs the relocation of its address-sensitive portions. D all of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	31. Which, of the following is not true about the description of a decision table?
	A A decision table is easy to modify B A decision table is directly understood by the computer C A decision table is easy to understand D All of the above Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	32. Trojan-Horse programs
	A are legitimate programs that allow unauthorized access B do not usually work C are hidden programs that do not show up on the system D usually are immediately discovered Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	33. IBM released its first PC in 1981. Can you name the operating system which was most popular at that time?
	A MS-DOS B PC-DOS C OS/360 D CP/M Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	34. Swapping
	A works best with many small partitions B allows many programs to use memory simultaneously C allows each program in turn to use the memory D does not work with overlaying Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	35. What is the name given to the process of initializing a microcomputer with its operating system?
	A Cold booting B Booting C Warm booting D Boot recording Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	36. A translator which reads an entire programme written in a high level language and converts it into machine language code is:
	A assembler B translator C compiler D system software Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	37. In which of the storage placement strategies a program is placed in the largest available hole in the main memory?
	A best fit B first fit C worst fit D buddy Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	38. What scheduling algorithm allows processes that are logical runnable to be temporarily suspended?
	A preemptive scheduling B non-preemptive scheduling C FIFO D FCFS Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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	39. Which of the following is not applications software?
	A Word processing B Spreadsheet C UNIX D Desktop publishing Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	40. Which of the following program is not a utility?
	A Debugger B Editor C Spooler D All of the above Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	41. Feed back queue
	A are very easy to implement B dispatch tasks according to execution characteristics C are used to favor real-time tasks D require manual intervention to implement properly Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	42. Block or buffer caches are used
	A to improve disk performance B to handle interrupts C to increase the capacity of main memory D to speed up main memory read operation Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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43. Assembler is

A a program that places programs into memory and prepares them for execution. B a program that automate the translation of assembly language into machine language. C a program that accepts a program written in a high level language and produces an object program. D is a program that appears to execute a source program as if it were machine language. Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	44. Multiprogramming systems:
	A are easier to develop than single programming system B execute each job faster C execute more jobs in the same time period D are used only on large mainframe computers Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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	45. Backups should be done
	A daily for most installations B weekly for most installations C as several image copies, followed by an incremental D as several incrementals, followed by an image copy Free MCQs www.sharemcq.com     Answer: Option D Explanation: Available Soon. Workspace View Answer Workspace

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	46. Which of the following can be accesses by transfer vector approach of linking?
	A External data segments B External subroutines C Data located in other procedures D All of the above Free MCQs www.sharemcq.com     Answer: Option B Explanation: Available Soon. Workspace View Answer Workspace

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	47. Assembler language
	A is usually the primary user interface B requires fixed-format commands C is a mnemonic form of machine language D is quite different from the SCL interpreter Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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48. The Memory Buffer Register (MBR)

A is a hardware memory device which denotes the location of the current instruction being executed. B is a group of electrical circuits (hardware), 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 D Explanation: Available Soon. Workspace View Answer Workspace

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	49. A system program that sets up an executable program in main memory ready for execution is
	A assembler B linker C loader D compiler Free MCQs www.sharemcq.com     Answer: Option C Explanation: Available Soon. Workspace View Answer Workspace

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50. Addressing structure

A defines the fundamental method of determining effective operand addresses B are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing. C performs indicated operations on two fast registers of the machine and leave the result in one of the registers. D all of the above Free MCQs www.sharemcq.com     Answer: Option A Explanation: Available Soon. Workspace View Answer Workspace

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