Operating System Questions and Answers May 17, 2021

Consider a computer running an mp3 player, an Xwindow system, a terminal with bash running desk top, a clock, and a wordprocessor. The mp3player have several things going on, playing music, updating a graphic mixer chart and showing rolling text with title information and playtime remaining. The word processor does spell checking while you write

What are the no-read up and no-write down rules in the context of multi-level security and how do they protect a system's security? What are three benefits that can be provided by an intrusion detection system? Context switching between two processes within an operating system is usually performed by a small assembly language function. Explain

A running program consists of one or more execution contexts plus an address space. In terms of execution contexts and address spaces, what is a process? What is a thread? When a thread exits, does a process exit? When a process exits, does a thread exit? Explain. Kernels in many operating systems support multiple execution contexts within the

With the aid of diagrams describe distributed system organised as a middleware. Distinguish between Process and Threads Explain how multithreading is implemented in distributed systems client such as web browsers. With the aid of well labelled diagrams, show how multithreaded servers can be organized in a dispatcher/worker model.

Consider an online banking application which has the features of bank to bank transfer, account transaction history, signup for paperless statements. Show the State Transition Diagram of application with the features mentioned above. How you would describe processes and threads in the above scenario.

Assume that create() and join() are always succeeded. How many processes and threads are created?

pidt pid pthreadcreate() pthreadjoin() pid fork() if(pid 0) pthreadcreate() pthreadjoin() pid fork() if(pid 0) pthreadcreate() pthreadjoin() pid fork()

What is scheduling? Distinguish between pre-emptive and non-preemptive. Use your own illustration to explain the difference between pre-emptive and non-preemptive. Explain the term thread. Critically compare and contrast the difference between program, process and thread with a clear illustration. Explain FIVE (5) major benefits of using thread.

Give five concrete reasons to show the differences between processes and threads. What are the biggest advantage and disadvantage of implementing threads in user space? What are two differences between user-level threads and kernel-level threads? Give one example to show what problem can incur by multiple threads of the same program sharing

Write a program that does the following When the program starts, it forks a new child process. The father process should wait for the child process to finish. . . . The main thread of the child process should spawn 5 additional threads. Each thread should print I am thread number X and terminate. The main thread of the child process should wait

What is operating system What are the functions of operating system Try to use semaphore to implement the following precedence graph sl 2 s3 4 s5 s6 Compare process and thread from the perspective of schedule, concurrency, resource and system cost

You are an application developer. You of course want to maximise the performance of your program. a) b) Explain if you want to implement your program using processes or threads from performances point of view. You need to explain the concepts of processes and threads. Explain if there are any scenarios that you may prefer to use processes over

If you are programming in Java and you need to share resources among multiple processes and threads in the central processing unit (CPU), which operating system feature would you be using

EXPLAIN THE DIFFERENCE BETWEEN VIRTUAL MEMORY AND PHYSICAL MEMORY AND DESCRIBE THE CONDITIONS THAT REQUIRE THE USE OF VIRTUAL MEMORY DESCRIBE HOW DISK SWAPPING IS USED TO IMPLEMENT VIRTUAL MEMORY

Discuss the implementation of Multithreaded Web client and Multithreaded Web server. Give examples What is the difference between Processes and Threads in terms of: - Memory space - CPU blocking - Context switching (Does the OS need to be involved?) - Creation and destruction Why context switch is costly? Explain the direct and indirect costs

Write a Java thread class called PrintArray that prints the content of a received array.

What are NOT responsibilities of the OS relative to process management? Explain.

Explain the effects of recovery, recrystallization, and grain growth on mechanical properties and on the shape and size of grains of a material. Use Figure to formulate answer. Compare the process and threads produced by rolling and machining process

Residual stresses Strength, Strength hardness, ductility Grain size Coldworked and recovered alapu I New grains Recovery Recrystal lization Temperature Ductility Hardness I Grain growth

Using Process explorer application ( download it), find out the following a. Open single chrome browser tab, Microsoft word and VLC player Find out number of process and threads associated with above application Write down each process details associated with single chrome browser tab, Microsoft word and VLC player

What is the purpose of: short-term scheduling? long-term scheduling?

Explain poll function with suitable example. Discuss concept of socket programming. Discuss the types of eclitor with example and eclitor structure

Draw a symbolic diagram that shows different states and transitions of a process. The shapes used for all states and transitions must be labelled. Draw original diagram by yourself.,Draw a symbolic diagram that shows different states and transitions of a process. The shapes used for all states and transitions must be labelled. Draw original

What are the challenges of the Processes and Threads Discuss how the analogy makes the differentiating of the terms easier? If you would differentiate the above discussed in one word, what would that be. And why?

Select system for indepth study and describe principal abstractions and services System calls Processes and Threading Process and Synchronization CPU scheduling Memory management, virtual memory, etc.

How many unique processes and threads are created in the following program segment? pid_t pid; pid = fork(); if (pid == 0) { /* child process */ fork(); thread.create(); } else { /* parent process */ fork(); thread.create(); } fork();

Existing operating system (Windows XP) and explain in detail the following issues. It is necessary to explain and illustrate (use two or three examples, screenshots, etc.) the following concepts for each operating system (not a general definition). 1. Process and threads 2. Process scheduling 3. Deadlock

Consider the following code segment, how many unique processes and threads are created How many times the sum will be printed and what are its values assuming that the user entered a value 20 for param include include include include include int sum10 void runner(void param) sum atoi(param) printf(Thread sum d , sum) pthreadexit(0) int

Describe the classes of application which have the ability to scale throughput with the number of cores. What distinguishes process and threads in some operating systems?

What is meant by System Calls? List and explain the three (3) main goals of an operating System Discuss any two (2) Scheduling algorithms available in an operating

The following two pieces of code use a process and a thread to manipulate the variable x, respectively. Discuss the possible values of the variable x, and then discuss the difference between process and thread int x 0 if(fork()0) X else X int x 0 ... pthreadcreate(athread,NULL,fun,NULL) X void fun(void arg) X

What describes processes and threads with a blocking system call of a single process control block (PCB)?

Table provides the details of three processes that are executed in a uniprocessor system that supports multithreading. Process P1 has two threads while processes P2 and P3 have one thread each. Time slicing is exploited to carrying out the scheduling. It takes 7 time units to complete a system call. You can assume that dispatching is effortless.

Thread are used to divide process in to chunks for multiprocessing of a task, if we have a process and thread then how we differentiate both with each other discuss it with example?

List and describe the thread states of Ubuntu OS. How do they differ from the process states? If Ubuntu OS does not support threading list and describe the difference in the process and thread states

Write a program to prove process creation takes more time than thread creation . [Create same number of processes and threads , then compare the time taken for both]

EXPLAIN THE FUNCTION OF THE FOLLOWING WINDOWS SYSTEM COMMANDS Information Maintenance GetCurrent Process ID() SetTimer () Sleep ()

How processes and threads compare in Windows Vista? Please provide links for information.

What are the four principles events of processes and threads advantages and disadvantages of each?

Compare process and thread from the perspective of schedule, concurrency, resource and system cost

Completely explain/describe in full about: a. Monolithic system and multiprogramming/multitasking in operation system b. Programs, processes and threads and their relationship to MUTEX in operation system

List six information about a process that needs to be saved when a context switch takes place.

Describe the processes and threads model of LINUX/Android and Window 8 or 10 (some details are required, such as the scheduling algorithms used, etc.)

Write a single program to perform the following tasks: Main process should create a child process. Both parent and child processes will create one thread (e.g. parent process thread A, child process thread B). Compare the ids of parent and child, parent process and thread A, parent process and thread B, child process and thread A, child process

In the program below, how many processes and threads are being created include include include int main() int i for (i 0 i 5 i) fork() threadcreate(tid, NULL, hello, NULL) return 0 int hello (void x)

Illustrate and list the times when the processes start running, finish running, and when the context switches take place. Calculate the average response time for the different threads. Show your working. Calculate the average turnaround time for the different threads. Show your working.,Process Process Priority Class NORMAL PRIORITYCLASS C

Compare the ids of parent and child, parent process and thread A, parent process and thread B, child process and thread A, child process and thread B. Display appropriate messages as per your comparison results.

Give me a process description output of nutrient cycle process. a process should be organized follows: 1. Introduction: what is this process who performs this process why is this process performed what are the chief steps in the process what point of view is this process to be discussed? Why is this process being described? 2. Equipment materials

Use a structural method prepare the following for the proposed Web-site below 1. Data dictionary 2. Process description

Given a process and intrumentation diagrams (P&ID) write a process description for P&ID

FIEL GAS SUPPLY FIC . FT tit FROM TIC OUTPUT TO SPIC (OPTION) FZ80 FV 08 190 .. FT Figure 1 Option 2 Split Range Control Valves This configuration shown in Figure 2 is used where the overall control valve rangeability required is d TO BURNERS VIA BLOCK VALVES

Submit a process description and a workflow diagram, as well as any advantages and disadvantages of workflow automation. Consider whether automating this or a similar operation creates or enhances risk in firms who choose to automate it.

Explain in 1 or 2 sentences what this part of VHDL code is doing. PositiveEdgeTriggered D FlipFlop with Reset VHDL Process Description library ieee use ieee.stdlogic1164.all entity dff is port (CLK, RESET, D in stdlogic Qout stdlogic) end dff

Select a bioprocess for hydrogen production. Select an type organic waste, and give data on the following; feedstock, production capacity, raw material needed, energy requirements. Then give a process description as well as schematics of the selected process from the chosen organic waste, and information on CAPEX, OPEX and profitability and steps

Explain or draw the three-step process description for SVM model development. Solve the LP problem described in slide number 28 for chapter 4 (Modeling and Analysis) using Excel, Lindo, or MATLAB software.

Deliberate about a case study related to Hazard and Operability Study for a pharmaceutical industry and answer the questions stated below. Explain the process description with layout diagram with methodology.

Must use the data dictionary notation provided. Should be consistent with DFD level 0. Each team member must write logical data flow descriptions for his/her level 0 diagram. Each team member must write physical data element descriptions for the data entities in his/her level 0 diagram (please use the correct notations) please use Oracle database

Use the following inter arrival times and service times of customers in minutes (First arrival is at t0) 1 Customer time 22 3 4 5 6 7 8 9 10 a. Carry out the manual simulation using the forms in the slides (slide 44) b. Construct event view and entity view tables. Calculate average time in the system, average waiting time, average customers per

Write as much as possible about the production of biofuel from algae as a process. / The process is: Algal biomass Extraction Transesterification - producing Biodiesel . 1- Select the type of algae 2- Production rate 3- Process description 4- Recommended operating conditions 5- Processing Strategy 6- Mass balance and energy audit 7- Basic

Discuss about any one of the glass industry with the following titles. a. Raw materials b. Properties c. Flow diagram d. Chemical reactions e. Process description f. Process conditions g. Finishing treatments h. Uses

Show the Process Flow Graph for the following processes description. S (S (S (P (P0, S (P1, P2)). P (P3, P (P4, P5))). P6). P (P7, P8)) What is the process description for the following Process Flow Graph?

P PG P P3 Ps Pa P0 E P7 P8

You have started a Hiring system in Lab 4. Many of the processes designed needed to be more described, lets take the filter application process: When the HR officer initiated the new job application and he set up the job description, the system had to filter the applications: The system checks if the degree title is same as job title: the system

DIY Sdn Bhd is selling retails goods. Customer may purchase goods in bulk. The goods that Customer wishes to purchase need to scan using the UPS barcode. When the UPS barcode is read, the descriptions and prices of the item is view from UPS price file. The goods name, prices and subtotals are stored in Temporary Transfile. When paying for items,

Make a process description of a mechanism in operation Installing Gable Roof Design INTRODUCTION BODY STEP1 STEP 2 STEP 3... (Can be more) CONCLUSION

There are three main sections of a Process Control Block. For each section, give an example of something it contains.

Define and describe data dictionaries and process descriptions Identify and justify your comments to the following question: Was the subject of improving the forms a physical implementation issue?

Conduct material and energy balances on a process that produces castor oil Material Balance For this assignment, the following should be provided 1. Process description include the product amountyear that is profitable and quality ( purity) and process alternatives. 2. Process flow diagrams including stream details (flowrates, temp, pressure,

The Kitchen Gadget system has one process for delivery management, whenever an order is confirmed, the Delivery process checks if a driver is available at the same day to deliver the order, and if none the process automatically notify the delivery services to schedule a driver for the next day. The delivery services manager can override the

A DCDC buck converter has Vin 10V and Vout 5V 0.05V into the rated load. The load current is 100W and the ripple current of the inductor is 2A. The switching frequency is 50 kHz. 1. Draw the circuit that will do the job. 2. Determine the switch duty ratio. 3. Determine the maximum voltage and current seen by the transistor and diode 4. Find the

Choose a process and explain its reasoning. Visualize the logic of the process using a process description tool (decision tree or decision table)

PASSENGER FILL FORMS() REQUEST A CALL() GET DETAILS() TAXI MANAGEMENT SYSTEM TAXI DB GET RATING() NOTIFY() END JOURNEY() DRIVER

Discuss process description of a 200 MGD Sewage Treatment Plant at Mai Kolachi (Karachi) based on a) aerobic suspended process; b) attached growth process, c) waste stabilization ponds and wetland technology. The wastewater comprises of both domestic and industrial wastewaters. The process description should include the following: a) Aerobic

Write a description of a process from the perspective of an interested observer. about "How files are stored on a computer disk" The process may be either human controlled or natural. The process description should be written in the indicative mood

Process description for a process of making potable Water, maybe someone has an idea or has something similar. The description should include the needed parts and how this process work. It must not be to long,

The goal is to manage and strategically guide the business side of an innovative AR/VR game concept named "Operation G.A.M.E.R.X." This project will require you to complete sections about target audiences, monetization strategies, marketing pitches, and campaign rollouts. For the target audience: Need Assistance with refining and defining a

Which kind of threads can be scheduled across multiple processors? Explain why?

Draw the situation by watch a man is considering taking an umbrella or not. The man is considering currying the umbrella only if the weather forecast forecasted a 60% chance or more of getting rain. Draw the process description map.

What word has this definition? "The proportional reductions of uncertainty" 1. system science 2. information 3. conceptual model 4. process description 5. inferential statistics

write a introduction to a process description of a Mechanism in Operation, the mechanism I chose was a ballpoint pen

The following must be reported 1. Introduction Sulfuric Acid background 2. Capacity Limitations Availability of raw materials 3. Flow diagram and Process Description 4. Conclusion and Recommendations 5. References

Part Briefly describe the manufacturing process of following polymer applications. Manufacturing Process Description Process Bottle Caps Nik Plastic Bottle Packaging Tray PipesTubes

Find and briefly explain a VHDL or Verilog Process Description in your own words, and using complete sentences neatly written. List the page and image number corresponding to your process description.

Choose a mechanism from the list below and write an introduction for the mechanism Include a diagram or picture of the mechanism Your audience should be an end-user, so the content of your introduction should be understandable to someone who doesnt have detailed knowledge of the mechanism. iPhone ballpoint pen Xbox Gears and drive trains

Assuming that item of key process equipment has not been added, revise the PID and write a Process Description for the use of a barometric leg and automtic PC control to keep the liquid level constant.,Green Existing andor PRC scope. Black Project scope. Red MWI scope. Prof Cundene Tag HA H42 H3 H4 P1 L P1 Equipment List P3 190 Proof Liquid 50500

Weak black liquor 15% 10 tons Evaporated water 7.5 tons Evaporation Strong black liquor 60% 2.5 tons A diagram above illustrates a lot of water evaporated from weak black liquor after pulp washing. For a better evaporation efficiency, "Multiple effect" evaporation is used. Give a detailed process description of multi effect evaporation.

Weak black liquor 15 10 tons Evaporated water 7.5 tons Evaporation Strong black liquor 60 2.5 tons A diagram above illustrates a lot of water evaporated from weak black liquor after pulp washing. For a better evaporation efficiency, Multiple effect evaporation is used. Give a detailed process description of multi effect evaporation. (10)

Which process description is it when a photopolymer is deposited on a platform? a. Binder Jetting b. Vat Photopolymerization c. Sheet Lamination bed d. Powder Bed Fusion e. Direct Energy Deposition f. Material Extrusion G. Polyjet

CaO is very important for chemical recovery, calcination (lime mud reburn) of lime mud into lime (CaO) occurs in rotatry lime kiln. Write down a process description of rotary lime kiln.

Detailed process descriptions of DFD level 1 (or lower level) in structured English: Each team member must develop at least 2 process descriptions for his/her level 1 processes (or lower level as required) level 1 diagram below

customer 2.1 Admin provides login details approves login stores details stores customer info 1 D1 0 2.0 RAS website Customer information,customer 2.1 Admin provides login details approves login stores details stores customer info 1 D1 0 2.0 RAS website Customer information

Debian symlinks all files in the runlevel directories back to the service script in /sbin/init.d. Solaris does not do this (it stores the startup scripts in two different locations.) What is the disadvantage to the Solaris method?

Streams is a programming mode for UNIX, give the programming model of Windows or MAC OS or for Solaris OS

Describe file serving in Sun Solaris system?

A world-leading producer of solar panels, Solaris BV, has enjoyed increased demand for its products in recent years. You are a finance professional who has been asked to perform a thorough analysis of Solaris. Solaris decides to proceed with a global digital investor roadshow for a 9-year USD100 million green bond. Explain why this debt instrument

A plate A (familiar from last weeks homework) occupies a region (x,y) R (x 1) y 4,y 0. (i) (ii) Assuming we want to draw a unit normal vectortangent to the point (2, y) on the boundary of said plate, what does the value of y have to be There are two separate possibilities. Find the a) Unit tangent vectors b) Outer unit normal vectors at both

Compare between SunOS and Solaris versions of Unix

Solaris decides to proceed with a global digital investor roadshow for a 9-year USD100 million green bond. Explain why this debt instrument may be a good funding option for Solaris and discuss the growth drivers for this field of finance.

Explain, with detailed examples, how Locards Exchange Principle would influence the forensic examination of a Solaris Server.

Describe how Solaris ZFS file system uses checksums to maintain the integrity of data.

Solaris is the sole supplier of solar panels in Sunnylandia. Solaris has no fixed costs and can supply solar panels at a constant marginal cost MC of $10 per panel. There are two different categories of customers of solar energy, business and residential. The businesses demand for solar panels is QB(P) = 240 3P. The residential demand for solar

what is partition? and why do we need partion in solaris

In Solaris, if an interactive thread with priority 25 is waiting for I/O, what is its priority recalculated to when it is eligible to run again? In Solaris, what is the time quantum (in milliseconds) of an interactive thread with priority 35 ?

Give a comparison between synchronization in solaris and synchronization in linux

A brief introduction to each operating system, describing its suitability for desktop, file serving and Web-Site hosting and any specific hardware requirements. Include in your introduction a brief outline of application support. For each operating system, describe the technical characteristics of process and memory management. For example, if

A data structure called task_struct is used to represent a process or thread in what OS ?

Consider the scheduling algorithm in the Solaris operating system for timesharing threads. a. What is the time quantum (in milliseconds) for a thread with priority 10 With priority 55 b. Assume that a thread with priority 35 has used its entire time quantum without blocking. What new priority will the scheduler assign this thread C. Assume that a