McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Common Topics in Competitive and Entrance exams .
| 201. |
An attached processor |
| A. | is used one only a few computers |
| B. | causes all processor to function equally |
| C. | is more difficult to implement than a co- processor |
| D. | is used only for limited, specific functions |
| Answer» D. is used only for limited, specific functions | |
| 202. |
Situations where two or more processes are reading or writing some shared data and the final result depends on who runs precisely which are called |
| A. | race condition |
| B. | critical sections |
| C. | mutual exclusions |
| D. | message passing |
| Answer» A. race condition | |
| 203. |
Producer consumer problem can be solved using |
| A. | Semaphores |
| B. | Event counters |
| C. | Monitors |
| D. | All of the above |
| Answer» D. All of the above | |
| 204. |
The strategy of allowing process that are logically run able to be temporarily suspended is called |
| A. | preemptive scheduling |
| B. | non preemptive scheduling |
| C. | shortest job first |
| D. | first come first served |
| Answer» A. preemptive scheduling | |
| 205. |
Moving process from main memory to disk is called |
| A. | Scheduling |
| B. | Cache |
| C. | Swapping |
| D. | Spooling |
| Answer» C. Swapping | |
| 206. |
Banker’s algorithm for resource allocation deals with |
| A. | deadlock prevention |
| B. | deadlock avoidance |
| C. | deadlock recovery |
| D. | mutual exclusion |
| Answer» B. deadlock avoidance | |
| 207. |
The dispatcher |
| A. | actually schedules the tasks into the processor |
| B. | is always very small and simple |
| C. | puts tasks in wait |
| D. | None of these |
| Answer» A. actually schedules the tasks into the processor | |
| 208. |
Processor-bound tasks |
| A. | use the processor more often |
| B. | use more processor time |
| C. | use less processor time |
| D. | always take longer to execute |
| Answer» B. use more processor time | |
| 209. |
The following resources can cause deadlocks |
| A. | Read only files |
| B. | Shared programs |
| C. | Printers |
| D. | All of the above Complex scheduling algorithms |
| Answer» C. Printers | |
| 210. |
The intensive jobs |
| A. | use less processor time than most jobs |
| B. | you are constrained by their I/O requirements |
| C. | run more quickly than processor- intensive jobs |
| D. | should all be executed at the same time |
| Answer» B. you are constrained by their I/O requirements | |
| 211. |
The FIFO algorithm |
| A. | executes first the job that last entered the queue |
| B. | executes first the job that first entered the queue |
| C. | executes first the job with the least processor needs |
| D. | executes first the job that has been in the queue the longest |
| Answer» B. executes first the job that first entered the queue | |
| 212. |
Check pointing a job |
| A. | allows it to be completed successfully |
| B. | allows it to continue executing later |
| C. | prepares it for finishing |
| D. | occurs only when there is an error in it |
| Answer» B. allows it to continue executing later | |
| 213. |
Windows is an |
| A. | operating system |
| B. | operating environment |
| C. | user interface |
| D. | programming platform |
| Answer» C. user interface | |
| 214. |
Following is/are operating system used in computers |
| A. | MS-DOS |
| B. | OS/2 |
| C. | UNIX |
| D. | All of the above |
| Answer» D. All of the above | |
| 215. |
The following operating system writes through catches? |
| A. | UNIX |
| B. | DOS |
| C. | ULTRIX |
| D. | XENIX |
| Answer» B. DOS | |
| 216. |
Which is/are the most important features of Microsoft windows program? |
| A. | Windows |
| B. | Pull-down menus |
| C. | Icons |
| D. | All of the above |
| Answer» D. All of the above | |
| 217. |
Multiprocessing models have |
| A. | symmetric multiprocessing model |
| B. | asymmetric multiprocessing model |
| C. | both (A) and (B) above |
| D. | None of these |
| Answer» C. both (A) and (B) above | |
| 218. |
Real-time systems are |
| A. | primarily used on mainframe computers |
| B. | used for monitoring events as they occur |
| C. | used for program development |
| D. | used for real-time interactive users. |
| Answer» B. used for monitoring events as they occur | |
| 219. |
Multiprogramming systems |
| A. | are easier to develop than single programming systems |
| B. | execute each job faster |
| C. | execute more jobs in the same time period |
| D. | are used only one large mainframe computers |
| Answer» C. execute more jobs in the same time period | |
| 220. |
Virtual memory is |
| A. | simple to implement |
| B. | used on all major commercial operating systems |
| C. | less efficient in utilization of memory |
| D. | useful when fast I/O devices are not available |
| Answer» C. less efficient in utilization of memory | |
| 221. |
Memory management is |
| A. | not used in modern operating systems |
| B. | replaced with virtual memory on current systems |
| C. | not used on multiprogramming systems |
| D. | critical for even the simplest operating systems |
| Answer» B. replaced with virtual memory on current systems | |
| 222. |
Scheduling is |
| A. | allowing job to use the processor |
| B. | making proper use of processor |
| C. | Both A and B |
| D. | None of these |
| Answer» C. Both A and B | |
| 223. |
Following is true for Multiprocessing |
| A. | It makes the operating system simpler |
| B. | It allows multiple processes to run simultaneously |
| C. | It allows the same computer to have multiple processors |
| D. | None of these |
| Answer» C. It allows the same computer to have multiple processors | |
| 224. |
A monitor program is a program that |
| A. | interprets the interrupt calls |
| B. | restores the status of the CPU after a function call |
| C. | interprets the input from a keyboard and converts the input into its binary equivalent |
| D. | checks the status of the I/O devices |
| Answer» C. interprets the input from a keyboard and converts the input into its binary equivalent | |
| 225. |
The process scheduler in the processor management unit |
| A. | gives all jobs to the job scheduler |
| B. | selects a job to run |
| C. | selects a process to run |
| D. | co-ordinates the process synchronization |
| Answer» C. selects a process to run | |
| 226. |
Round robin is a |
| A. | kind of magnetic drum |
| B. | process scheduling policy |
| C. | process synchronization policy |
| D. | memory allocation policy |
| Answer» B. process scheduling policy | |
| 227. |
Which is the correct definition of a valid process transition in an operating system? |
| A. | Wake up: ready ? running |
| B. | Dispatch: ready? running |
| C. | Block: ready ? running |
| D. | Timer runout : ready ? blocked |
| Answer» B. Dispatch: ready? running | |
| 228. |
A critical section is a program segment |
| A. | which should run in a certain specified amount of time |
| B. | which avoids deadlocks |
| C. | where shared resources are accessed |
| D. | which must be enclosed by a pair of semaphore operations. |
| Answer» C. where shared resources are accessed | |
| 229. |
Which of the following is an example of a spooled device? |
| A. | A line printer used to print the output of a number of jobs |
| B. | A terminal used to enter input data to a running program |
| C. | A secondary storage device in a virtual memory system |
| D. | A graphic display device |
| Answer» A. A line printer used to print the output of a number of jobs | |
| 230. |
A solution to the Dining Philosophers Problem which avoids deadlock is |
| A. | ensure that all philosophers pick up the left fork before the right fork. |
| B. | ensure that all philosophers pick up the right fork before the left fork. |
| C. | ensure that one particular philosopher picks up the left fork before the right fork, and all other philosophers pick up the right fork before the left fork. |
| D. | none of the above |
| Answer» C. ensure that one particular philosopher picks up the left fork before the right fork, and all other philosophers pick up the right fork before the left fork. | |
| 231. |
Locality of reference implies that the page reference being made by a process |
| A. | will always be to the page used in the previous page reference |
| B. | is likely to be to one of the pages used in the last few page references |
| C. | will always be to one of the pages existing in memory |
| D. | will always lead to a page fault |
| Answer» B. is likely to be to one of the pages used in the last few page references | |
| 232. |
The correct matching for the following pairs is - (A) Disk sucheduling, (1) Round robin, (B) Batch processing, (2) SCAN ,(C) Time sharing, (3) LIFO, (D) Interrupt processing, (4) FIFO, |
| A. | A-2, B-4, C-1, D-3 |
| B. | A-1, B-2, C-3, D-4 |
| C. | A-2, B-1, C-4, D-3 |
| D. | None of these |
| Answer» A. A-2, B-4, C-1, D-3 | |
| 233. |
Shared sub-directories and files are example of |
| A. | cyclic graph directory |
| B. | tree structured direction |
| C. | one level directory |
| D. | none of these |
| Answer» A. cyclic graph directory | |
| 234. |
The lowest level of I/O control consists of |
| A. | device drivers |
| B. | interrupt handlers |
| C. | both A and B above |
| D. | none of the above |
| Answer» C. both A and B above | |
| 235. |
Which type of design problem in file system |
| A. | how the file system should look to the user |
| B. | algorithm and data structure must be created to map the logical file system onto the secondary storage device |
| C. | Both A and B above |
| D. | none of the above |
| Answer» C. Both A and B above | |
| 236. |
Of the following which is the methods for allocating disks |
| A. | Contiguous |
| B. | Linked |
| C. | Indexed |
| D. | All of the above |
| Answer» B. Linked | |
| 237. |
External fragmentation solved by which allocation? |
| A. | contiguous allocation |
| B. | linked allocation |
| C. | index allocation |
| D. | both B and C |
| Answer» D. both B and C | |
| 238. |
Which O/I are best method for allocating? |
| A. | Contiguous |
| B. | Linked |
| C. | Index |
| D. | All of the above |
| Answer» B. Linked | |
| 239. |
The most efficient data set organization is |
| A. | a sequential file |
| B. | an ISAM file |
| C. | variable depending upon the usage of the data set |
| D. | a partitioned data set |
| Answer» C. variable depending upon the usage of the data set | |
| 240. |
A partitioned data set is most used for |
| A. | storing program data |
| B. | storing ISAM files |
| C. | a program or source library |
| D. | storing backup information |
| Answer» C. a program or source library | |
| 241. |
Fragmentation of the file system |
| A. | can always be prevented |
| B. | occurs only if the file system is used improperly |
| C. | can be temporarily removed by compaction |
| D. | is a characteristic of all file systems |
| Answer» C. can be temporarily removed by compaction | |
| 242. |
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 character |
| Answer» C. depends upon the size of the file | |
| 243. |
Disaster recovery |
| A. | is needed by every installation |
| B. | is never needed |
| C. | varies in degree between installations |
| D. | requires off-site computer for immediate use |
| Answer» C. varies in degree between installations | |
| 244. |
Wild-card specifies |
| A. | provide an easy way of finding groups of related files |
| B. | are only used when printing the contents of files |
| C. | can be used when writing a file |
| D. | allow several files to be read simultaneously |
| Answer» A. provide an easy way of finding groups of related files | |
| 245. |
The allocation map |
| A. | is used to store program data |
| B. | specifies which blocks are used by which file |
| C. | is updated by applications programs |
| D. | allows programs to erase files |
| Answer» B. specifies which blocks are used by which file | |
| 246. |
The activity of a file |
| A. | is a low percentage of number of records that are added to or deleted from a file |
| B. | is a measure of the percentage of existing records updated during a run |
| C. | refers to how closely the files fit into the allocated space |
| D. | is a measure of the number of records added or deleted from a file compassed with the original number of records |
| Answer» A. is a low percentage of number of records that are added to or deleted from a file | |
| 247. |
The volatility of a file refers to |
| A. | The number of records added or deleted from a file composed to the original number of records in that file |
| B. | Efficiency with which non-sequential files are processed |
| C. | The extent where the records of the file "are contiguous and in proximity to others |
| D. | Percentage of records that has changed" in a given time period |
| Answer» A. The number of records added or deleted from a file composed to the original number of records in that file | |
| 248. |
Which types of file organization are supported by magnetic tape? |
| A. | random files |
| B. | contiguous sequential file |
| C. | indexed sequential file |
| D. | all of the above |
| Answer» B. contiguous sequential file | |
| 249. |
Address Binding is defined as |
| A. | Compiler will typically bind these symbolic addresses to relocatable addressees |
| B. | Each binding is a mapping from one address space to another |
| C. | The linkage editor or loader win in turn bind these relocatable addresses to absolute addresses |
| D. | All of the above |
| Answer» D. All of the above | |
| 250. |
Compile time |
| A. | where the process will reside in memory, then absolute code can be generated |
| B. | where the process will reside in memory, then the compiler must generate relocatable code |
| C. | if the process can be moved during its execution from one memory segment to another,the binding must be delayed until run time |
| D. | all of the above |
| Answer» A. where the process will reside in memory, then absolute code can be generated | |
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