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What is context switching?
Date posted:
March 30, 2020
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What are the characteristics of the following process schedulers. i. short term scheduler. ii. medium term scheduler. iii. long term scheduler
Date posted:
March 30, 2020
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What are the characteristics of short term schedulers?
Date posted:
March 30, 2020
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What are the characteristics of long term scheduler?
Date posted:
March 30, 2020
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Distinguish between long and medium term scheduler
Date posted:
March 30, 2020
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Differentiate between medium and short term schedulers.
Date posted:
March 30, 2020
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Distinguish between the following process schedulers. (a) long term scheduler. (b) short term scheduler.
Date posted:
March 30, 2020
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Explain three common process schedulers.
Date posted:
March 30, 2020
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What is two-state process model, give it's description.
Date posted:
March 30, 2020
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List and explain three major process scheduling queues
Date posted:
March 30, 2020
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Briefly describe process control blocks
Date posted:
March 30, 2020
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List and explain processes state
Date posted:
March 30, 2020
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When a program is loaded into the memory and it becomes a process, it can be divided into four sections - stack, heap, text and data.
Date posted:
March 30, 2020
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What are the activities of operating systems related to real time system?
Date posted:
March 24, 2020
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Interactivity refers to the ability of users to interact with a computer system. An Operating system does the following activities related to interactivity -
Provides the user an interface to interact with the system.
Manages input devices to take inputs from the user. For example, keyboard.
Manages output devices to show outputs to the user. For example, Monitor.
Date posted:
March 24, 2020
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Advantages
High and efficient CPU utilization.
User feels that many programs are allotted CPU almost simultaneously.
Disadvantages
CPU scheduling is required.
To accommodate many jobs in memory, memory management is required.
Date posted:
March 24, 2020
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Basing on multitasking operating systems highlight six major activities of operating system involved.
Date posted:
March 23, 2020
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What are the activities of operating systems with relation to batch processing?
Date posted:
March 23, 2020
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The advantages of distributed systems are as follows -
With resource sharing facility, a user at one site may be able to use the resources available at another.
Speedup the exchange of data with one another via electronic mail.
If one site fails in a distributed system, the remaining sites can potentially continue operating.
Better service to the customers.
Reduction of the load on the host computer.
Reduction of delays in data processing.
Date posted:
March 21, 2020
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Distributed systems use multiple central processors to serve multiple real-time applications and multiple users. Data processing jobs are distributed among the processors accordingly.
The processors communicate with one another through various communication lines (such as high-speed buses or telephone lines). These are referred as loosely coupled systems or distributed systems. Processors in a distributed system may vary in size and function. These processors are referred as sites, nodes, computers, and so on.
The advantages of distributed systems are as follows -
With resource sharing facility, a user at one site may be able to use the resources available at another.
Speedup the exchange of data with one another via electronic mail.
If one site fails in a distributed system, the remaining sites can potentially continue operating.
Better service to the customers.
Reduction of the load on the host computer.
Reduction of delays in data processing.
Date posted:
March 21, 2020
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Time-sharing is a technique which enables many people, located at various terminals, to use a particular computer system at the same time. Time-sharing or multitasking is a logical extension of multiprogramming. Processor's time which is shared among multiple users simultaneously is termed as time-sharing.
The main difference between Multiprogrammed Batch Systems and Time-Sharing Systems is that in case of Multiprogrammed batch systems, the objective is to maximize processor use, whereas in Time-Sharing Systems, the objective is to minimize response time.
Disadvantages of Time-sharing operating systems are as follows -
Problem of reliability.
Question of security and integrity of user programs and data.
Problem of data communication.
Date posted:
March 21, 2020
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Time-sharing is a technique which enables many people, located at various terminals, to use a particular computer system at the same time. Time-sharing or multitasking is a logical extension of multiprogramming. Processor's time which is shared among multiple users simultaneously is termed as time-sharing.
Date posted:
March 21, 2020
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The users of a batch operating system do not interact with the computer directly. Each user prepares his job on an off-line device like punch cards and submits it to the computer operator. To speed up processing, jobs with similar needs are batched together and run as a group. The programmers leave their programs with the operator and the operator then sorts the programs with similar requirements into batches.
The problems with Batch Systems are as follows -
Lack of interaction between the user and the job.
CPU is often idle, because the speed of the mechanical I/O devices is slower than the CPU.
Difficult to provide the desired priority
Date posted:
March 21, 2020
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Explain batch operating systems.
Date posted:
March 21, 2020
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What are the activities of the operating systems with regard to file management?
Date posted:
March 21, 2020
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What are the activities of the operating systems with regard to device management?
Date posted:
March 21, 2020
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What are the activities of the operating systems with regard to processor management?
Date posted:
March 21, 2020
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List and explain 4 applications of an operating systems.
Date posted:
March 21, 2020
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Read the excerpt below and answer the questions that follow.
Helmer: (Standing at the door) Yes, do .Try and calm yourself, make your mind easy again , my frightened little singing bird.Be at rest, and feel secure; I have broad wings to shelter you under.(walks up and down by the door) How warm and cozy our home is , Nora.Here is shelter for you ; here I will protect you like a hunted dove that I have saved from a hawk's clawas;I will bring peace to your poor beating heart.It will come , little by little, Nora, believe me.Tommorrow morning you will look upon it all quite differently; soon everything will be just as it was before.Very soon you wont need me to assure you that I have forgiven you; you will yourself feel the certainty that I have done so.Can you suppose I should ever think of such a thing as repudilating you, or even reproaching you? You have no idea what a true man's heart is like,Nora.There is something so indescribably sweet and satisfying, to a man , in knowledge that he has forgiven his wife - forgiven her freely, and with all his heart.It seems as if that had amde her , as it were , doubly his own; and she has in a way become both wife and child to him.s so you shall be for me after this, my little scared , helpless darling.Have no anxiety about anything, Nora; only be frank and open with me, and I will serve as will and conscience both to you. What is this? Not gone to bed? Have you changed your things?
Nora: (In everyday dress) Yes, tORVOLD, i HAVE CHANGED MY THINGS NOW.
Helmer: But what for? - So late as this.
Nora :I shall not sleep tonight.
Helmer: But , my dear Nora-
Nora( looking at her watch) it is not so very late.Sit down here, Torvold.You and I have much to say to one another.
(sits down at one side of the table)
Helmer: Nora- what is this? This cold, set face?
Nora: Sit down.It will take some time; I have a lot to talk over with you.
Helmer:(Sits down at the opposite side of the table) You alarm me,Nora! - and I don't understand you.
Nora:No , that is just it.You don't understand me, and I have never understood you either- before tonight.No, you mustn't interrupt me.You must simply listen to what I say. Torvold, this is a settling of accounts.
Helmer: What do you mean by that?
1.Place this excerpt in its immediate context.
2.How is the character of Helmer brought out in this excerpt?
3.Comment on the use of imagery in this excerpt?
4.What are the two main issues of concern that are addressed in this execerpt?
5.I shall not sleep tonight.(Rewrite as an interrogative)
6.What is the attitude of Helmer towards Nora in this excerpt.Explain
7.Explain the meaning of the following vocabulary.
i)Repudiating
ii)Reproaching
iii)Indescribably
iv)Anxiety
Date posted:
March 16, 2020
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Read the following excerpt and answer the questions that follow.
Helmer: Miserable creature what have you done?
Nora: Let me go.You shall not suffer for my sake.You shall not take it upon yourself.
Helmer:No tragic airs, please .(Locks the hall door).Here you shall stay and give me explanation.Do you understand what you have done? Answer me! Do you understand what you have done?
Nora: (looks steadily at him and says with a growing look of coldness in her face) Yes, now I am beggining to understand thoroughly.
Helmer:(walking about the room) what a horrible awakening! All these years she who was my joy and pride a hypocrite , a liar, worse a criminal! The unutterable ugliness of it all! For shame! (Nora is silent and looks steadily at him.He stops in front of her) I ought to have suspected that something of the sort would happen.I ought to have suspected that something of the sort would happen.I ought to have seen it.All your father's want of principle has come out in you.No religion , no morality, no sense of duty.How I am punished for having winked at what he did! I did it for your sake, and this is how you repay me.
Nora: Yes, that's just it.
Helmer: Now you have destroyed all my happiness.You have ruined all my future.It is horrible to think of! I am in the power of an unscrupulous man; he can do what he likes with me ,ask anything he likes of me, give me any orders he pleases - I dare not refuse.And I must sink to such miserable depths because of a thoughtless woman.
Nora: When I am out of the way, you will be free.
1.Explain what has happened before this extract.
2.What does Nora mean by saying " You shall not suffer fro my sake?" Explain
3.How is Helmer's attitude towards Nora in this extract different from earlier in the plain.Briefly explain.
4.Discuss two themes raised in this extract.
5."Now you have destroyed all my happiness.You have ruined all my future." Discuss the style evident in the statement.
6.Isolate and explain the mood prevalent in this extract.
7."Here you shall stay and give me an explanation.' Rewrite beginning: You ........
8."When I am out of the way, you will be free."Give two possible meanings of Nora's words from the rest of the play.
9.Explain the meaning of the following expressions as used in the excerpt.
i)Take it upon yourself
ii)No tragic airs
iii)Your fathers's want of principle
iv)Unscrupulous man
Date posted:
March 16, 2020