Linux operating system uses (A) Affinity Scheduling (B) Fair Preemptive Scheduling (C) Hand Shaking (D) Highest Penalty Ratio Next

Linux operating system uses (A) Affinity Scheduling (B) Fair Preemptive Scheduling (C) Hand Shaking (D) Highest Penalty Ratio Next
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Answer :

(B) Fair Preemptive Scheduling

Explanation: Linux uses two process-scheduling algorithms: 1. A time-sharing algorithm for fair preemptive scheduling between multiple processes 2. A real-time algorithm for tasks where absolute priorities are more important than fairness
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Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) algorithm, then .............. context switches are required (suppose context switch at the beginning of Ready queue and at the end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Description : Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) ... end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Last Answer : (A) 3

FIFO scheduling is: a) Preemptive Scheduling b) Non Preemptive Scheduling c) Deadline Scheduling d) None of The Above

Description : FIFO scheduling is: a) Preemptive Scheduling b) Non Preemptive Scheduling c) Deadline Scheduling d) None of The Above

Last Answer : b) Non Preemptive Scheduling

What is the difference between time slicing and preemptive scheduling ?

Description : What is the difference between time slicing and preemptive scheduling ?

Last Answer : Ans. In preemptive scheduling, highest priority task continues execution till it enters a not running state or a higher priority task comes into existence. In time slicing, the task continues its execution for a predefined period of time and reenters the pool of ready tasks.

Explain the role of scheduler in RTOS. Compare pre-emptive and non-preemptive scheduling techniques.

Last Answer : The scheduler is very important in Real-Time Operating System (RTOS). Selection of tasks for execution is provided by the scheduler. Which task to execute when it is provided by the ... . Non-preemptive scheduling is simple.Preemptive scheduling is flexible while non-preemptive scheduling is rigid.

File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Description : File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : B) i, iii and iv only

Process Management function of an operating system kernel includes. A) Process creation and termination. B) Process scheduling and dispatching C) Process switching D) All of the above

Description : Process Management function of an operating system kernel includes. A) Process creation and termination. B) Process scheduling and dispatching C) Process switching D) All of the above

Last Answer : D) All of the above

........... is a large kernel containing virtually the complete operating system, including, scheduling, file system, device drivers and memory management. A) Multilithic kernel B) Monolithic kernel C) Micro kernel D) Macro kernel

Description : ........... is a large kernel containing virtually the complete operating system, including, scheduling, file system, device drivers and memory management. A) Multilithic kernel B) Monolithic kernel C) Micro kernel D) Macro kernel

Last Answer : B) Monolithic kernel

Which of the following is/are the functions of operating system? i) Sharing hardware among users. ii) Allowing users to share data among themselves. iii) Recovering from errors. iv) Preventing users from interfering with one another. v) Scheduling resources among users. A) i, ii, iii and iv only B) ii, iii, iv and v only C) i, iii, iv and v only D) All i, ii, iii, iv and v

Description : Which of the following is/are the functions of operating system? i) Sharing hardware among users. ii) Allowing users to share data among themselves. iii) Recovering from errors. iv) Preventing users from interfering with one another. ... only C) i, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : D) All i, ii, iii, iv and v

A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct? (A) OS maintains only scheduling and accounting information for each thread. (B) OS maintains only CPU registers for each thread. (C) OS does not maintain a separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.

Description : A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following ... separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.

Last Answer : (B) OS maintains only CPU registers for each thread.

C can be used on A) Only MS-Dos operating System B) Only Linux operating system C) Only Windows operating system D) All of the above

Description : C can be used on A) Only MS-Dos operating System B) Only Linux operating system C) Only Windows operating system D) All of the above

Last Answer : D) All of the above

In process scheduling, ………………… determines which ready process will be executed next by processor. A) long term scheduling B) medium term scheduling C) short term scheduling D) none of the above

Description : In process scheduling, ………………… determines which ready process will be executed next by processor. A) long term scheduling B) medium term scheduling C) short term scheduling D) none of the above

Last Answer : C) short term scheduling

.................. executes must frequently and makes the fine grained decision of which process to execute the next. A) Long-term scheduling B) Medium-term scheduling C) Short-term scheduling D) None of the above

Description : .................. executes must frequently and makes the fine grained decision of which process to execute the next. A) Long-term scheduling B) Medium-term scheduling C) Short-term scheduling D) None of the above

Last Answer : C) Short-term scheduling

A scheduling Algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (lowest priority). The scheduler re-evaluates the process priority for every 'T' time units and decides next process to be scheduled. If the process have no I/O operations and all arrive at time zero, then the scheduler implements .............. criteria. (A) Priority scheduling (B) Round Robin Scheduling (C) Shortest Job First (D) FCFS

Description : A scheduling Algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (lowest priority). The scheduler re-evaluates the process priority for every 'T' time ... (A) Priority scheduling (B) Round Robin Scheduling (C) Shortest Job First (D) FCFS

Last Answer : (B) Round Robin Scheduling

Which of the following scheduling algorithms may cause starvation? a. First-come-first-served b. Round Robin c. Priority d. Shortest process next e. Shortest remaining time first (1) a, c and e (2) c, d and e (3) b, d and e (4) b, c and d

Description : Which of the following scheduling algorithms may cause starvation? a. First-come-first-served b. Round Robin c. Priority d. Shortest process next e. Shortest remaining time first (1) a, c and e (2) c, d and e (3) b, d and e (4) b, c and d

Last Answer : Answer: 2

Unix Operating System use _________ Multitasking 1) Preemptive 2) Cooperative 3) multiprogrammingb 4) None

Description : Unix Operating System use _________ Multitasking 1) Preemptive 2) Cooperative 3) multiprogramming 4) None

Last Answer : 1) Preemptive

Unix Operating System use _________ Multitasking 1 Preemptive 2 Cooperative 3 multiprogramming 4 None

Description : Unix Operating System use _________ Multitasking 1 Preemptive 2 Cooperative 3 multiprogramming 4 None

Last Answer : 1 Preemptive

In process scheduling, …………………… determines when new processes are admitted to the system. A) long term scheduling B) medium term scheduling C) short term scheduling D) none of the above

Description : In process scheduling, …………………… determines when new processes are admitted to the system. A) long term scheduling B) medium term scheduling C) short term scheduling D) none of the above

Last Answer : A) long term scheduling

........... is a large kernel, including scheduling file system, networking, device drivers, memory management and more. A) Monolithic kernel B) Micro kernel C) Macro kernel D) Mini kernel

Description : ........... is a large kernel, including scheduling file system, networking, device drivers, memory management and more. A) Monolithic kernel B) Micro kernel C) Macro kernel D) Mini kernel

Last Answer : A) Monolithic kernel

The methods or algorithms which are used to increase the performance of disk storage sub-system is called ............. A) Disk performing B) Disk scheduling C) Disk storing D) Disk extending

Description : The methods or algorithms which are used to increase the performance of disk storage sub-system is called ............. A) Disk performing B) Disk scheduling C) Disk storing D) Disk extending

Last Answer : B) Disk scheduling

Which of the following statements is not true for Multi Level Feedback Queue processor scheduling algorithm? (A) Queues have different priorities. (B) Each queue may have different scheduling algorithm (C) Processes are permanently assigned to a queue (D) This algorithm can be configured to match a specific system under design

Description : Which of the following statements is not true for Multi Level Feedback Queue processor scheduling algorithm? (A) Queues have different priorities. (B) Each queue may have different scheduling algorithm (C) ... to a queue (D) This algorithm can be configured to match a specific system under design

Last Answer : (C) Processes are permanently assigned to a queue

The Unix Kernel maintains two key data structures related to processes, the process table and the user structure. Which of following information is not the part of user structure? (A) File descriptor table (B) System call state (C) Scheduling parameters (D) Kernel stack

Description : The Unix Kernel maintains two key data structures related to processes, the process table and the user structure. Which of following information is not the part of user structure? (A) File descriptor table (B) System call state (C) Scheduling parameters (D) Kernel stack

Last Answer : (C) Scheduling parameters

One of the disadvantages of user level threads compared to Kernel level threads is (1) If a user level thread of a process executes a system call, all threads in that process are blocked. (2) Scheduling is application dependent. (3) Thread switching doesn’t require kernel mode privileges. (4) The library procedures invoked for thread management in user level threads are local procedures.

Description : One of the disadvantages of user level threads compared to Kernel level threads is (1) If a user level thread of a process executes a system call, all threads in that process are ... privileges. (4) The library procedures invoked for thread management in user level threads are local procedures.

Last Answer : If a user level thread of a process executes a system call, all threads in that process are blocked.

Match the following mechanisms for interrupting the execution of a process and their uses. i) Interrupt a) Call to an operating system function ii) Trap b) Reaction to an asynchronous external event iii) Supervisor Call c) Handling of a error or an exception condition A) i-a, ii-b, iii-c B) i-c, ii-a, iii-b C) i-b, ii-c, iii-a D) i-a, ii-c, iii-b

Description : Match the following mechanisms for interrupting the execution of a process and their uses. i) Interrupt a) Call to an operating system function ii) Trap b) Reaction to an asynchronous external event iii) Supervisor Call c) Handling of a error ... -a, iii-b C) i-b, ii-c, iii-a D) i-a, ii-c, iii-b

Last Answer : C) i-b, ii-c, iii-a

The versions of windows operating system like windows XP and window Vista uses following file system: (A) FAT-16 (B) FAT-32 (C) NTFS (NT File System) (D) All of the above

Description : The versions of windows operating system like windows XP and window Vista uses following file system: (A) FAT-16 (B) FAT-32 (C) NTFS (NT File System) (D) All of the above

Last Answer : (D) All of the above

A .................... architecture assigns only a few essential functions to the kernel, including address spaces, Inter process communication(IPC) and basic scheduling. A) Monolithic kernel B) Micro kernel C) Macro kernel D) Mini kernel

Description : A .................... architecture assigns only a few essential functions to the kernel, including address spaces, Inter process communication(IPC) and basic scheduling. A) Monolithic kernel B) Micro kernel C) Macro kernel D) Mini kernel

Last Answer : B) Micro kernel

A virtual memory based memory management algorithm partially swaps out a process. This is an example of (A) short term scheduling (B) long term scheduling (C) medium term scheduling (D) mutual exclusion

Description : A virtual memory based memory management algorithm partially swaps out a process. This is an example of (A) short term scheduling (B) long term scheduling (C) medium term scheduling (D) mutual exclusion

Last Answer : (C) medium term scheduling

Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk service are not influenced by file allocation method. (C) Caching the directories and index blocks in main memory can also help in reducing disk arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Description : Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk ... arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Last Answer : (B) The number of requests for disk service are not influenced by file allocation method.

Consider the following justifications for commonly using the two-level CPU scheduling : I. It is used when memory is too small to hold all the ready processes. II. Because its performance is same as that of the FIFO. III. Because it facilitates putting some set of processes into memory and a choice is made from that. IV. Because it does not allow to adjust the set of in-core processes. Which of the following is true ? (A) I, III and IV (B) I and II (C) III and IV (D) I and III

Description : Consider the following justifications for commonly using the two-level CPU scheduling : I. It is used when memory is too small to hold all the ready processes. II. Because its performance is same as that of the FIFO. III. Because it ... ? (A) I, III and IV (B) I and II (C) III and IV (D) I and III

Last Answer : (D) I and III

If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319

Description : If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319

Last Answer : (C) 321

Which of the following is not an inherent application of stack? (A) Implementation of Stack (B) Evaluation of a postfix expression (C) Job Scheduling (D) Reverse a string

Description : Which of the following is not an inherent application of stack? (A) Implementation of Stack (B) Evaluation of a postfix expression (C) Job Scheduling (D) Reverse a string

Last Answer : (C) Job Scheduling

Consider a disk queue with I/O requests on the following cylinders in their arriving order: 6,10,12,54,97,73,128,15,44,110,34,45 The disk head is assumed to be at cylinder 23 and moving in the direction of decreasing number of cylinders. Total number of cylinders in the disk is 150. The disk head movement using SCAN-scheduling algorithm is: (1) 172 (2) 173 (3) 227 (4) 228

Description : Consider a disk queue with I/O requests on the following cylinders in their arriving order: 6,10,12,54,97,73,128,15,44,110,34,45 The disk head is assumed to be at cylinder 23 and moving in the direction ... . The disk head movement using SCAN-scheduling algorithm is: (1) 172 (2) 173 (3) 227 (4) 228

Last Answer : (2) 173

Which of the following is not one of three software product aspects addressed by McCall's software quality factors? (1) Ability to undergo change. (2) Adaptability to new environments. (3) Operational characteristics (4) Production costs and scheduling

Description : Which of the following is not one of three software product aspects addressed by McCall's software quality factors? (1) Ability to undergo change. (2) Adaptability to new environments. (3) Operational characteristics (4) Production costs and scheduling

Last Answer : Answer: 4

The process of copying data from a memory location is called a.reading b.writing c.controlling d.hand shaking

Description : The process of copying data from a memory location is called a.reading b.writing c.controlling d.hand shaking

Last Answer : a.reading

The process of putting data into a storage location is called a.reading b.writing c.controlling d.hand shaking

Description : The process of putting data into a storage location is called a.reading b.writing c.controlling d.hand shaking

Last Answer : b.writing

AIDS is caused by the Human Immunodeficiency Virus (HIV) The transmission of HIV infection generally occurs through. (a) eating contaminated food and water (b) transfusion of contaminated blood and blood products (c) inhaling polluted air (d) shaking hand with infected person

Description : AIDS is caused by the Human Immunodeficiency Virus (HIV) The transmission of HIV infection generally occurs through. (a) eating contaminated food and water (b) transfusion of contaminated blood and blood products (c) inhaling polluted air (d) shaking hand with infected person

Last Answer : Ans:(b)

Pick out the correct statement: (A) Removal of iron from ceramic material is necessitated (by magnetic separation method) so as to avoid discolouration of ceramic products (B) The operating cost of shaking screen is more than that of a vibrating screen (C) Screen capacity does not depend upon the specific gravity of the minerals (D) Asphalt is best crushed using toothed roll crusher

Description : Pick out the correct statement: (A) Removal of iron from ceramic material is necessitated (by magnetic separation method) so as to avoid discolouration of ceramic products (B) The operating cost of ... upon the specific gravity of the minerals (D) Asphalt is best crushed using toothed roll crusher

Last Answer : (A) Removal of iron from ceramic material is necessitated (by magnetic separation method) so as to avoid discolouration of ceramic products

The output generated by the LINUX command : $ seq 1 2 10 will be (A) 1 2 10 (B) 1 2 3 4 5 6 7 8 9 10 (C) 1 3 5 7 9 (D) 1 5 10

Description : The output generated by the LINUX command : $ seq 1 2 10 will be (A) 1 2 10 (B) 1 2 3 4 5 6 7 8 9 10 (C) 1 3 5 7 9 (D) 1 5 10

Last Answer : (C) 1 3 5 7 9

Which one among the following is not included in the basic functions of operating system? 1) Job Control 2) Job Scheduling 3) Memory Management 4) Data Management

Description : Which one among the following is not included in the basic functions of operating system? 1) Job Control 2) Job Scheduling 3) Memory Management 4) Data Management

Last Answer : 1) Job Control

Which scheduling policy is most suitable for a time-shared operating system?

Description : Which scheduling policy is most suitable for a time-shared operating system?  A) Shortest job first B) Round robin C) First come first serve D) Elevator

Last Answer : Which scheduling policy is most suitable for a time-shared operating system?  Round robin

Consider an experiment of tossing two fair dice, one black and one red. What is the probability that the number on the black die divides the number on red die ? (A) 22 / 36 (B) 12 / 36 (C) 14 / 36 (D) 6 / 36

Description : Consider an experiment of tossing two fair dice, one black and one red. What is the probability that the number on the black die divides the number on red die ? (A) 22 / 36 (B) 12 / 36 (C) 14 / 36 (D) 6 / 36

Last Answer : (C) 14 / 36 

Some of the criteria for calculation of priority of a process are: a. Processor utilization by an individual process. b. Weight assigned to a user or group of users. c. Processor utilization by a user or group of processes. In fair share scheduler, priority is calculated based on: (1) only (a) and (b) (2) only (a) and (c) (3) (a), (b) and (c) (4) only (b) and (c)

Description : Some of the criteria for calculation of priority of a process are: a. Processor utilization by an individual process. b. Weight assigned to a user or group of users. c. Processor utilization by a user or group of processes. In fair share ... (a) and (c) (3) (a), (b) and (c) (4) only (b) and (c)

Last Answer : (3) (a), (b) and (c)

What preemptive medication would you have to take to make it safe to eat the slain animals your cat brings you?

Description : What preemptive medication would you have to take to make it safe to eat the slain animals your cat brings you?

Last Answer : I’d eat the cat. If the animal that it ate didn’t kill the cat, then cat itself is probably edible.

Necessary conditions for deadlock are: a) Non preemptive and circular wait b) Mutual exclusion and partial allocation c) Both of The Above d) None of The Above

Description : Necessary conditions for deadlock are: a) Non preemptive and circular wait b) Mutual exclusion and partial allocation c) Both of The Above d) None of The Above

Last Answer : b) are privileged calls that are used to perform resource management functions, which are controlled by the operating system

Preemptive and cooperative both are type of 1) Multiprogramming 2) Multitasking 3) Multi-user 4) None

Description : Preemptive and cooperative both are type of 1) Multiprogramming 2) Multitasking 3) Multi-user 4) None

Last Answer : 2) Multitasking

Preemptive and cooperative both are type of 1 Multiprogramming 2 Multitasking 3 Multi-user 4 None

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Last Answer : 2 Multitasking

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Description : When your friend invites you on feast then what do you in these conditions? Options: A) You go only when you have class affinity B) You must go because one should give due honour to invitation C) You go at one or two houses of friends only D) Make lame excuses on next day

Last Answer : B) You must go because one should give due honour to invitation 

Which operating system is easy to use windows or linux?

Description : Which operating system is easy to use windows or linux?

Last Answer : answer:OS X. And @autodrome a mac is not “obscene amounts of cash.” My iMac works as well as it did when I bought it 7 years ago, without having to replace it and without annoying constant updates from MS that don’t work.

Linux Operating Of the system Father To say Is Who ?

Description : Linux Operating Of the system Father To say Is Who ?

Last Answer : Linux Operating Of the system Father To say Is - Tavled Linux

Why might a large company use the Linux operating system?

Description : Why might a large company use the Linux operating system?

Last Answer : it can be modified to fit the specific needs of the company

Can i use the HP Internal DVD with my linux operating system?

Description : Can i use the HP Internal DVD with my linux operating system?

Last Answer : Yes, linux has many drivers for many cd/dvd players.