Operating System Questions and Answers May 17, 2021

Why are the security issues important for you personally and professionally?Explain

Is security a technical issue? A business issue? Or Both? Explain

Discuss about security configuration issues and their solutions, location, type, quantity of data, user privileges. .

Describe a security issue you encountered in the past. Explain the trouble shooting steps you took. What would troubleshooting techniques could you incorporate into your general troubleshooting process?

Explain security and privacy issues in an organization and recommend on how to deal with them.

Discuss security, privacy and ethical issues facing MIS today and highlight the professional ways to manage them.

Describe the internet security problems can caused by employees and propose a solution to improve system security inside the organization.

Describe three thread models and the degree to which each supports parallelism.

Describe 5 security threats that can be caused by issues within the organisation.

A semaphore: what is it? Provide the semaphores access operations as well.

What is Thread Class and Commonly Used Constructors of Thread Class.

What operations does the thread package contain? Explain

List 6 different types of threads and at least one use per type of thread.

Describe the security issues associated with identity and access management, and review some of the recommended remediations for those issues. Review Security architecture and recommendations for implementing compensating controls.

All of the following are issues of computer security except Permitting access to data by unauthorized individuals Providing correct data to unauthorized individuals Permitting computer operators unlimited access to the computer room Releasing incorrect data to authorized individuals

Give at least two sentences (per figure) explaining any security concerns you may or may not have. Suggest security solutions that address the concerns you mentioned.

1. 2 3. INTERNET PHYSICAL DIAGRAM PC EMPLOYEE (private area) Engineering hosts 172.16.52255 gogg Screen (name guard2) 172.16.5.1 R1 Mobile E (private area) Administration Station 172.16.2.113 Internet (insecure public network) Wireless Access Point Secure Router 3 NAS 1 EMPLOYEE (public area or DMZ) ttpwww server (name internet) 172.16.1.2 ggggo

What are the security issues it is likely to face and how can proper policies be enforced to ensure security of the system.

Describe two common sources of security problems among end users.

Process control involves the effect of an input to any process with the aim of directing the output from the process to behave in a predetermined manner. Using your own words give a brief description of the following process control terminology: a) Set point. b) Manipulative variable c) Disturbance d) Error e) Program logic controllers f) Sensor

What is a Process Control Block and why is it important? Describe and discuss the typical elements stored in a process control block.

What exactly is the aim of process control? What kind of difference is it looking for? Explain

Write a program in a monitor process to perform: Parent Process reads data from the shared memory and stores it in _.log The child process triggers/Receives a signal to the Generator process if there is no data in shared memory.

What is the importance of Log Management Localization and why is it important to the Linux community?

For SRTF and SJF algorithms study them and develop them using C programming language in a Linux environment. Consider the following data for SRTF and SJF Process P1 P2 P3 P4 P5 Arrival Time 0 10 12 20 25 Burst Time 14 6 12 17 4

Given two program threads which can be run on different CPUs. Thread A Thread B B12 clock cycles B2 conflicts with B1 A13 clock cycles A2no dependences A3 conflicts with Al A4depends on result of A3 B3 depends on result of B2 B4 no dependences, 2 clock cycles a. Assume a finegrained multithreaded processor that allows two threads to run

Only Speeding Ltd is a manufacturing company that specializes in sport clothing and casual wear. Only Speeding has 2,830 machine hours available to produce either OS Tee or OS Hoodie. The cost accounting department developed the following unit information for each product Sales price Direct materials Direct labour Variable manufacturing overhead

Massive environmental change, such as that proposed to occur prior to mass extinctions, would likely produce selective challenges very different from those encountered at other times in a species history. Selective discrimination by events of mass extinction is called which of the following? Multiple Choice catastrophic species selection

A multithreaded program A. requires a machine with multiple processors. B. contains multiple threads of execution. C. is another name for multi-tasking. D. may have multiple schedulable threads of execution. Apple OS X is A. derived from BSD Unix. B. open source. Access control is part of information protection and security. Access control

Company ASEM (Advanced Software for Equipment Management) is designing software to monitor and control a custom-build system consisting of multiple hardware components (e.g., Equipment1, Equipment 2, and Equipment3). Each equipment component provides unique status, accepts unique commands, and implements a specific interface for communicating,

The following implementation with the obvious meanings of Account, SavingsAccount, and CheckingAccount violates some fundamental object-oriented design principles. Re-implement the three classes to get a clean set of classes. public class Account { private double balance; private int type; public static final int CHECKING_ACCOUNT = 1;

Write three classes to represent a payment. A payment class represents a payment by the amount of money (as a double) and the date of the payment. A cash payment represents a payment by the amount and date. A credit card payment represents a payment by the amount, date, and also the name and credit card number. In each class, include: instance

Which is NOT one of the essential attributes of good software? Maintainability Efficiency Acceptability Traceability Which is NOT one of the activities of the Analysis Phase? Requirement elicitation Requirement specification Requirement validation Requirement implementation Which is NOT one of the stages of the software development life cycle?

In a functional design, it is very important to separate behavior from data. The data types are simple and "dumb". And then separately, you have a number of functions that act on those data types. This is the exact opposite of an object-oriented design, where behavior and data are meant to be combined. After all, that's exactly what a class is. In

An object is a software module in object-oriented design (OOD). An object class, which is made up of two componentsstructural properties and behavioural methodsdefines similar objects. The Unified Modeling Language (UML) class diagram can display an object class. If you think of an object class as the fundamental unit of software, the design of

Make a Console Application in Visual Studio using C# and name it as A1YourFirstnameLastname. 2. Implement a vehicle rental management system which is capable of doing the following: View all, available and reserved vehicles. Reserve vehicle or cancel a reservation. 3. The application must be menu-based app: 1 - View all vehicles 2 - View available

Create a Javaprogramthat simulates a board band service company and allows user to pick a TV, Internet and Phone and show the cost. In this program the design is left up to the programmer however good object-oriented design is required. Project Requirements Develop a text-basedmenu driven program that calculates board band service company package

What is the difference among the principles of modularization, abstraction, encapsulation, and separation of interface and implementation? Provide an example of each. Compare and contrast the structured design strategy with the object-oriented design strategy.

write C classes to represent and work with polynomials. The specific implementation details are up to you, but you must use the names and method signatures given in the requirements and you should utilize good objectoriented design principles. Your code should compile with no warnings. 1. term.cpphpp Create a class called Term which has the

The process of object-oriented design, which one is not included (a) activities to design the system architecture, (b) identify objects in the system, (c) describe the design using different object models, (d) create all the objects required. In project planning, a project milestone is a predictable outcome of an activity or set of activities. (a)

Use Java and object-oriented programming techniques in your implementation. Your design should follow good object-oriented design principles such as: Single responsibility a class should have responsibility for a single functionality of a program and that responsibility should be encapsulated by the class. Open/closed principle classes or

Select statements about Multiprocessors that are FALSE. a. Asymmetric multiprocessors are a popular form of tightly coupled architecture b. Symmetric multiprocessors are a popular form of tightly coupled architecture c. Tightly coupled multiprocessors share a single centralized memory, which requires an operating system to synchronize processes

Design the slab and girder of a bridge using HS20-44 Loading. Include impact consideration in both horizontal and vertical effects. Consider that it is possible for two trucks to be simultaneously on the bridge.

22 W V HS2044 8,000 LBS HS1544 6.000 LBS. 0.2W 0.1 W 140 0.1W 1 HIGHWAY BRIDGES 32,000 LBS. 24,000 LBS. 10,8 W 0.4 W 0.4 W CLEARANCE AND LOAD LANE WIDTH 100 0001 20 COMBINED WEIGHT ON THE FIRST TWO AXLES WHICH IS THE SAME AS FOR THE CORRESPONDING H TRUCK. VARIABLE SPACING 14 FEET TO 30 FEET INCLUSIVE SPACING TO BE USED IS THAT WHICH PRODUCES

Buji manufactures cars and trucks. Each car contributes $300 to profit and each truck contributes $400. The resources required in manufacturing cars and trucks are shown on the table below. Each day, Buji can rent up to 98 Type 1 machines at $50 per machine. At present, the company has 73 Type 2 machines and 260 tons of steel available. Marketing

A 6 m long parallel flange IPE 180, IProfile, is to be simply supported at the ends Calculate the magnitude of the distributed load per metre length which the beam can carry if the bending stress is not to exceed 68 MPa Take the mass of the beam into consideration The following formulae may be used For a uniform cross section beam with

Explain how to find key airfoil aspects and related attributes of lift production for a Cessna 172 s a starting point and the minimum content to cover, a shortlist of considerations and discussion points are provided below and can be directly copied into your presentation. A. Main airfoil for your selected aircraft Stall AOA and associated CL max

A snow load on a 8mlong Pratt roof truss can be modeled by five 1kN forces acting vertically on joints A, B, C, D and E, as shown below. 1 kN 2 m 1 kN 1 kN A B H 2 m 1 kN 1 kN B 2 m 2 m H 2 m G 2 m Find the vertical reactions at support A and E, then find the force in each member of the truss, determine whether each member is in tension or

What is the Kerberos system message sent from the Authentication Server to Ticked Granting Server called via client? a) How many symmetric encryption keys are used during one Kerberos session? b) Kerberos system enhances OS security on the networked OS. What does Kerberos eliminate and so make networked OS more secure?

Propose a numerical method and implementation for solving the following problems. Briefly describe the methodimplementation and justify your choice, including considerations such as robustness, accuracy, and speed (approximately 13 sentences per part you dont need to recall all of the gritty details of the scheme you are suggesting). 1. Suppose

Calculate the design block tearing resistance of the symmetrical connection shown which is subjected to concentric tension loading. Fy275 Nmm, Fu 430 Nmm, YM2 1.25. Take into consideration the following parameters el30mm, e235mm, pl80mm, p260mm, gusset thickness4mm, member thickness6mm (You can use the bolts design tables) 7 O Gusset plate Member

Configure the cache coherence protocol using the following configurations: MSI, MESI, and DRAGON. For each of the configurations, obtain the global miss rate for the system using the memory traces: FFT, Simple, Speech and WeatherConfigure the cache coherence protocol using the following configurations: MSI, MESI, and DRAGON. For each of the

Users view of the computer varies according to the O a type of kernel used. O b. application programs installed. Oc type of CPU used. Od interface being used.

PART A Which of them are symmetric in the exchange of electrons 1 and 2? PART B Which of them are antisymmetric in the exchange of electrons 1 and 2? PART C Which of them are neither symmetric nor antisymmetric in the exchange of electrons 1 and 2?

The functions under consideration are a. 1s (1)2s(2) 2s (1)1s(2) a(1)B(2) B(1)a(2) b. 18(1)2s(2) 28 (1)1s(2) a (1)a(2) c. 1s (1)2s(2) 2s (1)1s(2) a(1)B(2) B(1)a(2) d. 18(1)2s(2)2s(1)1s(2) a(1)8(2) B(1)a(2) e. 18(1) 28 (2) 28 (1)1s(2) a(1)(2)3(1)a(2)a(1)a(2) X

What is Serverless computing? When we should use AWS Lambda over Amazon EC2? Q2: What are AWS Lambda security best practices?

Consider a single-server queuing system. Customers arrive according to a Poisson process with rate 5 / hour. Service time is exponentially distributed with mean 1/8 hours. (a) Find L, Lq, W, Wq using the results of M/M/1 model. (b) Find L, Lq, W, Wq using Pollaczek-Khichine formula and compare with (a). (c) Assume that service time is

Consider a single-server queuing system where customers arrive according to a Poisson process with rate , service times are exponential with rate , and customers are served in the order of their arrival. Suppose that a customer arrives and finds (n-1) others in the system. Let X denote the number of customers in the system at the moment that

Customers arrive at a singleserver queue in accordance with a Poisson process with rate 0. The single server processes customers one at a time and the service times are exponentially distributed with rate 0. However, the customers are impatient, and each waiting customer will renege (leave the system without receiving service) after waiting in

An increase of expected inflation will lead to: a move to the right along the consumption and the saving functions a downward shift of the consumption function and an upward shift of the saving function a downward shift of both the consumption and the saving functions an upward shift of both the consumption and the saving functions an upward shift

Briefly describe the approach to designing a Mover and Shaker Distance Control System in an embedded system.

How to convert an embedded system into an IoT system? Explain

WHAT IS THE FUNDAMENTAL METAPHOR OF THE UNIX OPERATING SYSTEM? EXPLAIN

Explain in details how Unix file permissions relate to octal numbers.

Assume the scheduler in the OS will not start a job unless there are five tape drives available. When a job is started, five drives are assigned immediately and are not released until the job finishes. What is the maximum number of jobs that can be in progress at once? What are the maximum and minimum number of tape drives that may be left idle as

Explain how social media has influenced information technology. Explain one way social media has improved the way companies use information technology. Explain one way social media has negatively affected the way companies use IT. Explain one way social media has helped to improve society. Explain one way in which social media has harmed society.

Consider the vector field F (yx.x) and curve C r(t) (7 cos t,7 sin t) for Osts 2x. K a. Based on the picture, make a conjecture about whether the circulation of F on C is positive, negative, or zero. b. Compute the circulation. a. Choose the best answer below. OA. The circulation is probably close to zero because the vector field is nearly

Describe the indexed allocation method in brief.

Which techniques are available for resolving deadlocks?

Describe the security features that are available within Linux and through packages available for Linux, and how they can be used to safeguard systems and data from cyberattacks. consider how users can unknowingly compromise Linux security. you might address the following : virus and threat protection account protection firewall and network

Distributions or distros are different versions of the Linux operating system. Some are based on Debian, which is also known as Debian GNU/Linux. Others are based on Fedora, Ubuntu, other distributions, or are independent. Research Linux distributions and select one that interests you to discuss with the class. Identify the distribution origins,

What benefits does inter-process communication offer? Describe the different ways that inter-process communication is implemented as well.

Consider a single-server queueing system with a Poisson arrival process and exponentially distributed service times. The interarrival times have a mean value of 20 mins and the mean service time is 25 mins. Choose the correct (a) The server will be always busy after the first customer arrives (b) The queue will grow and explode (c) If a second

Consider a single-server queuing system. If the arrival rate is 44 units per hour, and each customer takes 30 seconds on average to be served, what is the average time in the system to include service (answer in minutes to 2 decimal places)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a

Consider an uncapacitated single-server queueing system for which the arrival process is Poisson with rate 2 customers per hour, and service times are Exponential with a mean of ( 0.1 ) hours. For this setting, expected number of customers in the system at the steady-state is ( 0.25 ). Calculate the expected number of customers in the service at

A manager is trying to improve a single-server queueing system through automation. The current system has an average service time of 20 minutes per customer, exponentially distributed, and the arrival rate is 16 customers per 8-hour day (Poisson arrivals). The automated system is required to improve the wait time in the system by reducing it to

Suppose the number of jobs currently in a system may be modeled as a Bernoulli Single-Server Queueing Process with capacity 5. In one frame (step), the probability that one job will enter the system (that is, the probability of an arrival) equals 0.29. Moreover, if there is at least one job in the system, the probability that the job being

Consider a singleserver queueing system that can hold a maximum of two customers excluding those being served. The server serves customers only in batches of two, and the service time (for a batch) has an exponential distribution with a mean of 1 unit of time. Thus if the server is idle and there is only one customer in the system, then the server

Which of the following is an example to explain the principle unoccupied time feels longer than occupied time" for managing waiting lines? Emergency department let patients and their families know what the waits are, why they have to wait, and what to expect to alleviate their anxiety Customers would accept longer wait at a popular restaurant

Explain what a file-system journal file or transactional log file is. Explain why the existence of the log or journal file ensures recovery of a file system after a system crash.

Complete the given questions according to the information given in the table below

Autonomous consumption is If disposable income is 1250, then saving is When saving is zero, disposable income is Marginal propensity to consume is Marginal propensity to save is Saving equals 75 when disposable income is Saving is positive for all disposable income values over When disposable income increases from 1 750 to 2 000 savings

class A public B If x is an object of A, then the member function of x 1) cannot directly access any members of class B 2) can directly access only the public members of class B 3) can directly access only the public and protected members of class B 4) can directly access the public, protected and private members of class B

Describe how Are Embedded Systems and The Internet of Things Different?

Create a directory and name it Lin_a2 and do the following tasks within Lin_a2. Show each command with a screenshot. a. echo Jordan >> file1 echo Mitch >> file2 b. Write a script to swap the names of two files, file1 and file2. After running the script, file1 should contain "Mitch" and file2 should contain "Jordan". c. Write a script shell.sh that

Name and explain the working of the directory in which UNIX usually stores the executable files.

What is the Unix command to change file or directory permissions?

Diagram the structure of Traditional Unix system in detail.

What is the meaning of chmod? Mention 2 different modes of chmod? Write down the syntax for symbolic mode and numeric mode and include the meaning for all the parameters? Write down the Unix command to change owner of a file using chown? What is pipe and discuss the redirection operators? Discuss whitespace, quoting, wildcards, and escape

One type of affinity license plate in Ontario consists of the pattern NNAANN where N is a numeric digit and A is a letter of the alphabet for example 32ML68 or 59PE74. Write a single Unix command using a regular expression which will search the file manifest and display lines containing plate numbers of this format which occur by itself on a line

Multicore systems present certain challenges for multithreaded programming. Describe these challenges.

Determine the deflection of the free end A of the simply supported beam shown in Figure Use the Macaulay s method Take EI 5 MNm 15 kN A 2 m B 2 m 25kNm C 2 m D 2 m 15 kN E

What are the key characteristics of a Symmetric Shared-memory Multiprocessor (SMP)?Explain in detail

Evaluate the following limit or explain why it does not exist. 23) lim X00 Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. OA. L lim x In 1 X8 the variable) 6 This implies that lim X0 SCIED is finite and therefore lim X00 () can be written as the expression (Type an exact answer in simplified

For the given unitary feedback system with forward path transfer function G(S) KS(S 2)(S 3), design an ideal derivative compensator to yield a 16 OS with a settling time T of the uncompensated one.

50mph is the design speed on a vertical summit curve connecting a 2% grade with a -2% grade on a highway .Using the perception reaction time of 2.5 sec. and a coefficient of friction os 0.30, determine the min.length of the curve.

A Cartesian equation for the parametric curve is given by O 21x23y483, os xs 23 O 21x23y21, Os XS 23 Ox483, 0 x 483 O 23x21y483, OS XS 21 O 21x23y1, Os x 23 x23sin8, y21cos20, s 0 3n2

A system has an openloop transfer function of 10 G(s) s(10.5s) (1 0.2s) It has a feedback whose transfer function is H(s) (1Ts). Calculate the value(s) of T so that the closedloop system operates stably.

What is the difference between parallelism and concurrency?

In a transaction processing system, concurrency specifically refers to: a. users simultaneously accessing the same data b. compatibility with different operating systems c. query processing speed d. maintaining the database recovery logs e. replicating the database to other servers

Discuss some of the well known synchronization problems as examples of a large class of concurrency control problem?

Discuss how various classic problems can be of use in examining concurrency issues?

Discuss the importance of concurrency control and explain the various levels of locking?

What kind of concurrency issues appear in Java?