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Operating System Questions and Answers June 11, 2018

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Find at least three online demos of sentiment analysis software. Find at least three different movie reviews where the user also includes a score. For example customer movie reviews on amazon and netflix use a 5 star rating system. Copy and paste the text into the sentiment analysis demonstration software and compare the positive/negative score

Explain the difference between the Microsoft Software Model and SAAS.

Discuss the pros/cons of cloud computing.

Since technology resources are essential, having a data center, that is a secure physical space to house technology resources, is essential. The job of a properly run data center is to ensure access to information and technology resources where needed, and when needed. Until recently, organizations needed to do everything. They built a secure

Using current computer magazines and business publications, research the ways in which one of the operating systems described in this module is being used today. What kinds of businesses are using the operating system? Why? How much is the operating system being used by individuals on personal computers? What are the advantages of the operating

what is the difference between Network operating System and operating system? which software can i say is Network operating System?

Write a Python function to perform a depth-first search (DFS) on a graph represented as an adjacency list

Write a recursive function in Java to calculate the factorial of a given non-negative integer.

How do emerging memory technologies, such as non-volatile memory (NVM) and persistent memory, influence the design and implementation of virtual memory systems, and what opportunities do they present for enhancing system performance, reliability, and energy efficiency ?

What advancements have been made in virtual memory research to address the scalability challenges posed by increasingly large-scale and heterogeneous computing systems, including innovations in distributed virtual memory management and memory disaggregation techniques ?

How do operating system mechanisms such as memory protection, access control, and privilege levels safeguard the integrity and security of virtual memory address spaces, particularly in multi-user and networked computing environments ?

How do modern processors leverage techniques such as Translation Lookaside Buffers (TLBs) to expedite address translation in virtual memory environments, and what are the trade-offs associated with TLB design in terms of size, associativity, and management policies ?

Write a function in Java to reverse a given string without using any library function.

How do security considerations intersect with virtual memory design, and what vulnerabilities arise from memory-based attacks such as buffer overflows, code injection, and privilege escalation, prompting the development of mitigations like address space layout randomization (ASLR) and memory-safe programming languages ?

What advancements in virtual memory research are driven by emerging technologies such as non-volatile memory, heterogeneous memory architectures, and hardware accelerators, and how do these developments shape the future trajectory of memory management in computing systems ?

How do cache hierarchies interact with virtual memory systems, and what optimization techniques are employed to enhance cache coherence, minimize cache thrashing, and exploit spatial and temporal locality in memory accesses ?

What are the implications of virtual memory overhead on system performance, particularly in scenarios characterized by high memory pressure, frequent context switching, or memory fragmentation ?

Write a JavaScript function to remove duplicate elements from an array.

Write a Python program to implement the A* search algorithm for finding the shortest path between two nodes in a graph.

How do security incident response and digital forensics methodologies enable organizations to effectively detect, contain, and recover from security breaches, and what are the best practices for establishing incident response plans and conducting post-incident analysis to improve resilience against future threats ?

How do regulatory frameworks such as GDPR, HIPAA, and PCI-DSS influence organizational security practices and compliance requirements, and what strategies can organizations employ to achieve regulatory alignment and demonstrate due diligence in protecting sensitive data ?

What are the implications of emerging technologies such as Internet of Things (IoT), artificial intelligence (AI), and blockchain on cybersecurity, and how do these technologies introduce new attack vectors and necessitate innovative security solutions ?

How do secure software development practices, including threat modeling, code review, static and dynamic analysis, and security testing, contribute to the identification and mitigation of vulnerabilities throughout the software development lifecycle ?

What role do intrusion detection and prevention systems (IDS/IPS) play in safeguarding against network attacks and anomalous behavior, and how do they leverage techniques such as signature-based detection, anomaly detection, and machine learning to identify and mitigate security threats ?

How do security mechanisms like access control lists (ACLs), role-based access control (RBAC), and attribute-based access control (ABAC) enforce least privilege principles and mitigate the risk of unauthorized access to sensitive resources in enterprise networks and information systems ?

What are the challenges associated with securing distributed systems and cloud computing environments, including issues related to data privacy, access control, and the shared responsibility model between cloud service providers and customers ?

Create a C program to implement a basic shell with support for executing commands, piping, and redirection.

How do cryptographic primitives such as symmetric and asymmetric encryption, hashing algorithms, and digital signatures contribute to the establishment of secure communication channels and data integrity in modern computing systems ?

What are the implications of API monetization strategies, including freemium models, usage-based pricing, and subscription plans, for API providers and consumers, and how do these strategies align with broader business objectives and market dynamics ?

Create a C program to find all prime numbers up to a given integer using the Sieve of Eratosthenes algorithm.

What design patterns and architectural principles do you employ when building microservices-based applications to ensure loose coupling, scalability, and fault isolation in a heterogeneous distributed system ?

Everything in this question should go in the "q3" folder. The file should be named "index.html". Make the title of this page: "(Your Name)'s Dog and Cat Counter". Put a single button on the screen. When the user clicks the button, prompt the user for an element to count. Keep a tally of how many times the user types a word containing "dog" (in any

Java banking application programming problem. Here is the link to the instructional pdf along with the necessary class files provided. https://drive.proton.me/urls/BXSX1B1JPW#Tszv5jlWUYME

@param n (assume n is more than or equal to zero) * @param destBase (assume destBase is a number between 2 and 10) * @return the number in destBase base. * for example, * convert(13, 2) returns "1101" since 13 in base-2 is 1101 (1*8 + 1*4 + 0*2 + 1*1 = 13) * convert(19, 3) returns "201" since 19 in base-3 is 211 (2*9 + 0*3 + 1*1 = 19) *

practice exception handling via catching or throwing the exception. Recall that we catch exceptions via surrounding the exception with a try/catch block. If we cannot catch the exception then we need to throw it to the caller by instantiating a new Throwable object using the throws keyword. Then specifying in the method signature what type of

Bash Shell Programming: 2) Copy the flag.txt file from the /etc directory to the local directory Using cat, type the flag number displayed in flag.txt that you copied. Using echo and su, display the contents of the FLAG variable and type in the flag displayed. 3) Using echo and su, display the contents of the FLAG variable and type in the flag

Need help with Regex using notepad++. I have a data set with emails similar to this: I'm using this code to search for the emails: My issue is that I need to format the emails to be uppercase up to the @ symbol and lowercase after the @ symbol. I can make the whole email uppercase using \U\1 but I need help with only making the names up to the @

1. What is the average time complexity to add an item to the end of an ArrayList? 2. What is the worst case time complexity to add an item to the end of an ArrayList? What if you have to or don't have to reallocate? 3. Taking this all into account, what situations would an ArrayList be the appropriate data structure for storing your data?

Computer Science I am working with Maven, trying to manually update a p2repo on a machine without Internet access. I updated the p2repo but when I build I get this error. I assume it is having a problem getting the p2repo jar files to build and create the m2 repo snapshots. I redacted a few names with ****. Can you explain this error and walk me

"Super String Software" program that uses the Java string "class" to analyze a number of strings. Your first step is to design a form that resembles the following You should then add the required code for each of the buttonsso that the program completes each of the indicated tasks, and displays the solution in each of the related labels.

With the rise of containerization technologies like Docker and Kubernetes, how will traditional operating system design principles like process isolation and memory management need to adapt to efficiently and securely manage containerized workloads while still maintaining compatibility with legacy applications that rely on the operating system

Q:Question:The Linux Operating System: Case Study 1. What are the advantages and disadvantages of writing an operating system in a highlevel language, such as \( C \) ? 2. Linux runs on a variety of hardware platforms. What steps must Linux developers take to ensure that the system is portable to different processors and memory-management

Q:Question:Section 4.5.2, Linux does not distinguish between processes and threads. Instead, Linux treats both in the same way, allowing a task to be more akin to a process or a thread depending on the set of flags passed to the clone() system call. However, many operating systems ?? such as Windows XP and Solaris ?? treat processes and threads

Q:Question:What are the advantages and disadvantages of writing an operating system in a highlevel language, such as C? 2. Linux runs on a variety of hardware platforms. What steps must Linux developers take to ensure that the system is portable to different processors and memory-management architectures and to minimize the amount of

Q:Question:your help. You need to explore and study Four (4) type of operating systems (Any Linux distro, Apple Mac OS, Apple iOS and any Google Android based OS). Using your own creativity, write a technical report that include but not limited to the elements below. 1. History and background 2. System architecture and mechanism 3. Improvements

Q:Question:b. Linux does not distinguish between processes and threads. Instead, Linux treats both in the same way, allowing a task to be more akin to a process or a thread depending on the set of flags passed to the clone() system call. However, many operating systems?? such as Windows XP and Solaris??treat processes and threads differently.

Q:Question:1. A single-server queuing system with an infinite calling population and a first-come, first-served queue discipline has the following arrival and service rates: ? = 12.1 customers per hour ? = 14.5 customers per hour Determine P0, P1, P4, L, Lq, W, Wq, and U.A:Answer:we have ? = 12.1 customers per hour ? = 14.5 custo...

Q:Question:Administrator of Linux networking lab want to check the cable connectivity on each system, which command he should use to test the cables connectivity?A:Answer:This command is used to check cable connectivity. ...

Q:Question:[10 points] A customer arriving to a system with arrival rate ?, joins a single-server queue and after being served is sent back to the beginning of the queue with probability p (where p is such that 0 ? p ? 1 ), or leaves then system with probability (1-p). We have learned the (typical) average number of customers in the queue is L_q.

Q:Question:SOLID is an acronym for the five object-oriented design (OOD) principles defined by Robert C. Martin. They are a set of rules and best practices to follow while desig ning a class structure. List and explain FIVE (5) key SOLID principles.A:Answer:ANSWER : SOLID is an acronym that stands for five ...

Q:Question:A computer has cache memory and main memory, currently they are in the following - Assume cache memory has 4 slots. Where (X.Ys) means block X has been uploaded to the cache memory and has not been referenced since Y seconds. Trace the cache memory if the processor requests to transfer the other blocks (C, D) consequently from main

Q:Question:Explain the similarities and differences between cache memory and virtual memory (5 points) Explain the similarities and differences between cache memory and virtual memory.A:Answer:Solution:- Differences between cache memory and vi...

Q:Question:n requesting access to the same data ine from main memory. Both processors have a cache memory and using the MESI protocol. Initially both caches contain an invalid copy of line \( x \). Fill in the following table and design the situation diagrams with the cache states (for the line in the cache memory of the original processor - and

Q:Question:Problem 3: Direct Memory Access is used for high-speed I/O devices in order to avoid increasing processor execution load: (a) How does the processor interface with the Direct Memory Access Controller (DMA Controller) to coordinate transfers? (b) How does the processor know when memory access is complete? (c) The processor is allowed to

Q:Question:Q3. Let we have a cache memory that has only 4 lines and main memory that has 32 blocks. You have to find and calculate which block of main memory will occupy which line of cache memory using direct mapping technique.A:Answer:Direct Mapping ?? The simplest technique, known as ...

Q:Question:Let we have a cache memory that has only 4 lines and main memory that has 32 blocks. You have to find and calculate which block of main memory will occupy which line of cache memory using direct mapping technique.A:Answer:In Direct Mapping, a particular block of main memo...

Q:Question:PACKET TRACER according to the information given below. The head office consists of the following equipment: Ten Windows XP and ten Windows 7 workstations, connected to a Windows Server 2008 R2 file server. One Windows Server 2008 R2 RRAS server . One Windows Server 2008 R2 print server. One Linux database server. One Apache Web server

Q:Question:QUESTION 4 (a) You are tasked with ensuring Fault Tolerance in a quorum-based system with replication. (i) Explain what is meant by k fault tolerance. (ii) How many replicated copies would be necessary to ensure the system could endure 14 faults? (iii) Would the amount of necessary copies be affected in the presence of Byzantine

Q:Question:This week we discussed Fault Tolerance. The Distributed File System is only one example of Fault Tolerance. Find some other technologies from Microsoft or other vendors that help protect data. End your discussion with justifying to your manager why the company can benefit from such a (likely expensive) purchase. What is the cost and can

Q:Question:(1)Discuss the major trade-offs between a command line interface and a graphical user interface. (2)Describe the format of a CLI command. What is an operand? What is the difference between a keyword operand and a positional operand? (3)In addition to the commands themselves, command languages provide additional capabilities that are

Q:Question:4 Employee "david" owns a directory, "exams," containing a text file called "papers. txt" that he shares with users belonging to the group "examiners." Those users can not only read and change this file, but also delete it. They can add other files to the directory. Others may neither read, write, nor execute anything in "examiners."

Q:Question:Please explain the Standard file permissions in the Linux. And also explain the different types of permissions.A:Answer:The Permission depends on the type of group and ba...

Q:Question:In the UNIX file system, there are three types of access permission:

Q:Question:User ??ahmed? owns a directory, ??stuff,? containing a text file called ??ourstuff.txt? that he shares with users belonging to the group ??staff.? Those users may read and change this file, but not delete it. They may not add other files to the directory. Others may neither read, write, nor execute anything in ??stuff.? What would

Q:Question:Which is better: a graphical user interface (GUI) or a command-line interface (CLI)?A:Answer:GUI interface will provides more convenient to the...

Q:Question:A file in a Linux file system has the following permissions: 754 What access do group members have?A:Answer:Given: permission numeric notation for a particula...

Q:Question:What is semaphore? Write down the pseudo code for the wait and signal functions (operations) for a semaphore.

Q:Question:tableA:Answer:Let us denote the variables in the problem using t...

Q:Question:Give a short description of peer-to-peer architecture.A:Answer:See a step by step answer

Q:Question:5. Inverted Page TableA:Answer:Inverted Page Table: All the process in the operat...

Q:Question:Hello please I need help for this Give me two examples of security issues in your everyday lives issues on internet ?A:Answer:Answer) As part of the Internet users, there are m...

Q:Question:Please help me with these questions and please read them carefully 1. Give at least two sentences (per figure) explaining any security concerns you may or may not have. 2. Suggest security solutions that address the concerns you mentioned in \( \# 1 \).A:Answer:The server must be more secure and must be hidden ...

Q:Question:{ print $ 3}^3 Is -1 | awat 'NF > 3{ print $$} Which Unix command exists specifically to delete a directory that is already empty? and coodir erase delete What keyboard key can be used to view previously entered Unix commands? The up-arrow key The SHIPT key The ALT key The TAB key Which Unix command can be used to view the first few

Q:Question:point) KPls should be converted to ... time $$$ effort skill-level D. View hint for Question 36 Question 37 (1 point) Your process description should be made in which order B P M ?> Revised BPM ? Process description Revised BPM >> BPM >> Process description BPM s P Process descriptiom > Revised BPM Process description > B BPM > Revised

Q:Question:costs. Question options: schedule feasibility technical feasibility economic feasibility operational feasibility Your process description should be made in which order Question options: BPM >> Revised BPM >> Process description Revised BPM >> BPM >> Process description BPM >> Process description >> Revised BPM Process description >> BPM

Q:Question:0. (8 pts.) A system consists of three components A, B, and C connected in parallel. Each component functions properly with probability \( 0.8 \), and the components operate independently. What is the probability that the system functions properly?

Q:Question:a)graph the system of inequalities representing the constraints b) find the value of the objective function at each corner of the graphed region An objective function and a system of linear inequalities representing constraints are given. Objective Function z=4 x-2 y Constraints {[ 2 ? x ? 7; y ? 2; x-y ?-5 ]. a. Graph the system of

Q:Question:Objective 5 - Reduce a distributed loading to an equivalent resultant force system The system is loded as shown, Determine the equtralent resaltant force and orientatian from 0A:Answer:See a step by step answer

Q:Question:fraction decomposition of the rational expression 45-9x/x^3-6x^2+9x 2) Solve the system 8x^2+5y^2=80 y=x+4 3) An objective function and a system of linear inequalities representing constraints are given.Graph the system of inequalities representing the constraints.Find the value of the objective function and the values of x and y for

Q:Question:Computer Architecture Problem 2. There are two levels L1 and L2 of caches. L1 has hit rate \( 90 \% \), and L2 has hit rate \( 85 \% \). L1 has 1 cycle to access. L2 has 20 cycles to access. Main memory has 400 cycles to access. a) Compute the average number of cycles to access memory one time. b) Ignoring memory access, clocks per

Q:Question:List the major components in the memory hierarchy. Discuss how the principle of locality relates to the use of multiple memory levels in the computer memory system.A:Answer:Answer a Major components in memory hierarchy are ...

Q:Question:3. What is the difference between compare_and_swap() and test_and_set() instructions in a multiprocessor environment. Show how to implement the w a i t^()and signal() semaphore operations in multiprocessor environments using the compare_and_swap() and test_and_set() instructions. The solution should exhibit minimal busy

Q:Question:Given a 100 -processors multiprocessor system and an application that has \( 15 \% \) of the code parallelized, what is the approximate effective speed-up?Given a 10-processors multiprocessor system and an application that has \( 85 \% \) of the code parallelized, what is the approximate effective speed-up?A:Answer:See a step by step

Q:Question:4. (15 pts) Consider a processor with the following specifications: - Clock rate is 1 GHz, has two levels of cache: L1 and L2. - L1: miss rate 3 %, 1-cycle access time - L2: miss rate 1 %, 18-cycle access time - Main memory access takes 200 cycles Calculate the average memory access time (AMAT) for this processor.A:Answer:See a step by

Q:Question:8) Supposing you have a system where the time for main memory access is 0.2 microseconds and the time for cache access is 0.04. a) What is the average memory access time for this system with a hit rate of 80%? b) What is the average memory access time for this system with a hit rate of 90%?A:Answer:Given, Main memory access 0.2

Q:Question:What is the average memory access time of a machine whose rate is 96%, with a cache access time of 3 ns and a main memory access time of 70ns?

Q:Question:branch office on the east side of town. The headquarters has the following equipment: - Ten Windows XP and ten Windows 7 workstations, connected to a Windows Server 2008 R2 file server - One Windows Server 2008 R2 RRAS server accessed by home workers after hours - One Windows Server 2008 R2 print server - One Linux database server - One

Q:Question:Critically differentiate between direct memory access and sequential memory accessA:Answer:See a step by step answer

Q:Question:Suppose the cache access time is 5 ns, main memory access time is 100 ns , and the cache hit rate is 90%. Assuming memory access is initiated only when there is a cache miss, what is the effective memory access time ?A:Answer:Given Cache access time = 5 ns Cache hit rate = 90...

Q:Question:Memory Access Impact on Performance: B [10] Assume that main memory accesses take 85 ns and that memory accesses are 35 % of allA:Answer:1] Clck rate = 1/ L1 hit time = 1/0.54 Clck rate =...

Q:Question:What is the Average Memory Access Time for P1 and P2? Which processor is faster for memory accesses? Assume that main memory accesses take 70 ns and that memory accesses are 36 % of all instructions. The following table shows data for L1 caches attached to each of two processors, P1 and P 2.A:Answer:See a step by step answer

Q:Question:A memory management system uses TLB (Translation lookaside buffer) to enhance memory access time. If time to access a TLB is x nanoseconds and time to access main memory is y nanoseconds (y >>x), determine effective memory access time when TLB hit ratio is p ( 0 < p <1)? Also, determine the effective memory access time when x = 1

Q:Question:Problem 4: Average Memory Access Time (15) The L 1 cache takes 1 cycle to access and has a 5 % miss rate, L2 cache takes 2 cycles to access and has a 30 % miss rate, and main memory takes 200 cycles to access. Please calculate the average memory access time.A:Answer:See a step by step answer

Q:Question:Calculate the Average Memory Access Time for a system with a Hit Rate of 65 %, Average Cache Access Time of 200 usec, and a Average Main Memory Access Time of 1,000 usec. 1140 usec 1,070 usec 550 usec 900 usecA:Answer:See a step by step answer

Q:Question:Operating system 9. A computer has cache memory and main memory, currently they are in the following [1 Mark] - Assume cache memory has 4 slots. Where (X,Ys) means block X has been uploaded to the cache memory and has not been referenced since Y seconds. Trace the cache memory if the processor requests to transfer the other blocks (C,

Q:Question:In a 8-way set associative cache memory system, the main memory size is 32Mbytes and the cache memory size is 256kBytes. If the block size is 64 Bytes, find the number of tag bits required for this set-associative cache memory and the size of the tag directory for the cache memory system.Q3 In a 8-way set associative cache memory

Q:Question:SMP configuration request access to the same data line from the main memory. Both processors having a cache memory and using the protocol MESI. Initially both cache memories contain an invalid copy of x line. To design situations diagrams of cache memories (for the line in the cache memory of the original processor - and in line cache

Q:Question:The headquarters has the following equipment: ? Ten Windows XP and ten Windows 7 workstations, connected to a Windows Server 2008 R2 file server ? One Windows Server 2008 R2 RRAS server accessed by home workers after hours ? One Windows Server 2008 R2 print server ? One Linux database server One Apache Web server for members to check

Q:Question:The two words cutoff on the right are "with" in the first line and "and" in the second. Problems 3.1 The following state transition table is a simplified model of process management, the labels representing transitions between states of READY, RUN, BIQCKED. NONRESIDENT. /r/n Give an example of an event that can cause each of the above

Q:Question:As shows the state transition table is a simple model of process managemnt. with titles representing the transitions between each state of READY, RUN,BLOCKED, and SUSPEND. The following state transition table is a simplified model of process managernent, wil the labels representing transitions between states of READY. RUN. BLOCKED, and

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