PPSC Computer Science Full Book test With Answers

PPSC Computer Science Full Book test

Sr. # Questions Answers Choice
1 Banker's algorithm deals with Dead lock prevention Dead lock avoidance Dead look recovery Mutual exclusion
2 A series of statements explaining how the data is to be processed is called. Instruction Compiler Program Interpretor
3 Daisy chain is a device for Connecting a number of controllers to a device Connecting a number of device to a controller all of above None of above
4 Dijkstra's algorithm deals with Mutual exclusion Dead lock avoidance Dead lock recovery Real time processing
5 Remote computing services involves the use of time sharing and Multiprocessing Interactive processing Batch processing Real time processing
6 Four necessary conditions for dead lock are none pre emption circular wait and Mutual exclusion Race condition Buffer overflow None of above
7 Poor response times are caused by Busy processor High I/O rate High paging rates any of above
8 Dynamic allocation of storage areas with VSAM files is accomplished by Hashing Control splits Over flow areas Relative recording
9 To avoid the race condition the number of process that may be simultaneously inside the critical section is 1 3 0 12
10 Which of the following does not interrupt an running process. A device Timer Scheduler process Power failure
11 Which process is known for initializing a microcomputer with its OS. Cold booting Boot recording Booting Warm booting
12 Which operating system use write through catches. UNIX XENIX ULTRIX DOS
13 Creating a job queue is a function of Spooler Interpolator Complier Drive
14 A high paging rate May cause a high I/O rate Keeps the system running well Is a symptom of too much processor activity Always creates a slow system.
15 A publics key encryption system. Allows only the correct sender to decode the data Allows only the correct receiver to decode the data Allows any one to decode the data None of above
16 Fragmentation of a file system. Occurs only is file is not used properly Can always the prevented Happens in all file systems. Can be removed by conmpaction
17 Shortest job First executes first the job. With the least processor needs That first entered the queue That has been in the queue for the longest That last entered the queue
18 A thread is. Lightweight process where the context switching is low Lightweight process where the context switching is high Used to speed up paging Used in dead locks
19 Multiprogramming system Are easier to develop than signal programming system. Execute each job faster Execute more jobs in the same time Are used only on large main frame computers.
20 What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity. Defined values Fixed values Default values None of the above
21 The part of machine level instruction which tells the central processor what has to be done is. Operation code Address Locator Flip flop
22 Which technique is used by operating systems to execute several program concurrently by switching back and forth. Partitioning Multitasking Windowing Paging
23 Problem of thrashing is affected significantly by Program structure Program size Primary storage size All of above
24 Macintosh computer uses System 7.0 AU/X Xenix None
25 Which operating system reacts in the acutal time. Batch system Quick response system Real time system Time sharing system
26 Reference bit is used for Implementing LRU page replacement algorithm Implementing NRU algorithm To check the page table entry in the cache memory None of above
27 Which is signal user operating system. MS-DOS UNIX XENIX LINUX
28 In which scheduling policies context switching never takes place FCFS Round robin Shortest job first Pre empitive
29 For multiprogramming operating system. Special support from processor is essential Special support from processor is not essential Cache memory is essential None of abvoe
30 Semaphores are used to solve the problem of. Race condition Process synchronization Mutual exclusion Belady problem
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