2021 Spring CC Exam 2 (Cloud Computing) PDF

05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored) Due No due date Points 108 Questions 28 Available after Apr 8 at 1:01pm Time Limit 85 Minu...

05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored) Due No due date Points 108 Questions 28 Available after Apr 8 at 1:01pm Time Limit 85 Minutes Exam Requirements A webcam and microphone are required to take this exam. Exam Security This exam will be monitored by Proctorio. Learn more about Proctorio (https://proctorio.zendesk.com/hc/articles/200972514). Instructions Single attempt Closed notes, no Internet search/browsing activity. Time limit: 85 min to give you enough time despite any technical issues (It will be automatically submitted when time is up.) Once you are done, write 'I am done.' on zoom chat and leave quietly. Tips/Notes: Pay attention to the word 'NOT'. Some questions ask for a not-a-correct statement while some questions ask for a correct statement. Multiple choice vs. Multiple answers questions: Select only one answer for multiple-choice questions. Select one or more answers for multiple-answers questions. Note that For every correct response that is selected, the student gets that many points. For every incorrect response that is selected, the student loses that many points. Attempt History Attempt Time Score LATEST Attempt 1 85 minutes 76.48 out of 108 Score for this quiz: 76.48 out of 108 Submitted Apr 8 at 2:31pm https://umkc.instructure.com/courses/65270/quizzes/64176 1/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing This attempt took 85 minutes. Question 1 1 / 1 pts Academic Integrity Auth. Make an auth that you will take this exam honestly without any cheating. (hint: the correct answers are all 'Yes, I do'.) Correct! Do you understand that Yes, I do. you might get fail (F) grade if you cheat? Correct! Do you understand that Yes, I do. your career might be ill- fated if you cheat? Correct! Do you swear that you are Yes, I do. going to take the exam honestly? Other Incorrect Match Options: No Maybe Not sure Question 2 3 / 3 pts Storage Services. Which of the following is NOT about storage services? Data Deduplication Replication Correct! Thick Provisioning Virtualization https://umkc.instructure.com/courses/65270/quizzes/64176 2/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Question 3 3 / 3 pts Data protection (at-rest). Which of the following is about at-rest data protection schemes? orrect Answer HTTPS TLS Correct! File access control FTPS Question 4 3 / 3 pts DAS. Which of the following is NOT to do with DAS (Direct Access System)? SATA RAID SCSI Correct! HTTP Question 5 1 / 1 pts SAN-performance. SAN offers block level access with high bandwidth than NAS. https://umkc.instructure.com/courses/65270/quizzes/64176 3/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Correct! True False Question 6 0 / 1 pts SAN - access granularity. SAN allows block-level access typically in a LAN environment. orrect Answer True ou Answered False Question 7 1.33 / 4 pts NAS characteristics. Which of the following is/are correct about the characteristics of NAS? (Select all that apply) Correct! File-based access orrect Answer Unlimited distance orrect Answer It allows share storage resources among multiple users from a disstance Block-based access Question 8 0 / 3 pts https://umkc.instructure.com/courses/65270/quizzes/64176 4/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Storage abstraction. Which of the following is at the highest level of storage abstraction? file storage ou Answered block storage orrect Answer object storage Question 9 3 / 3 pts Storage virtualization technique. Which of the following is NOT provided by storage virtualization? Storage Pooling Correct! Data Deduplication Name Space Isolation Question 10 6 / 6 pts Storage virtualization benefit. Which of the following is/are the benefit(s) of storage virtualization? Correct! Applications can use storage without the restriction of data location. Correct! Applications can use storage without the restriction of platform used. Correct! Multiple smaller volumes appear as a single larger volume. https://umkc.instructure.com/courses/65270/quizzes/64176 5/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Correct! Applications can use storage without the restriction of storage system implementation. Applications can use storage without the restriction of data permission. Correct! Data is spread over multiple physical disks to improve reliability and performance. Question 11 4 / 4 pts Object storage - characteristics. Which of the following is/are correct about object storage? (Select all that apply) All cloud storage services are based on 'Objects'. Correct! Flat addressing scheme that allows greater scalability. Correct! It combines data with comprehensive associated metadata and attaches a unique custom identifier Correct! Meta data provides deep analysis of the use and function of data in the storage pool. Question 12 5 / 5 pts Hot-Warm-[Cold] storage. Which of the following is/are about cold cloud storage service? (Select all that apply.) https://umkc.instructure.com/courses/65270/quizzes/64176 6/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing AWS EBS Correct! Azure Cool Blob Storage Correct! AWS S3 Glacier Google Drive Correct! Google Archival Cloud Storage Question 13 4 / 4 pts CDN-comparison. Which of the following is/are correct about the problems of server farms and Web caching proxies for content distribution? (Select all that apply) Correct! Server farms do nothing about problems due to network congestion, or to improve latency issues due to the network Correct! Accounting issues with caching proxies. For instance, cnn.com needs to know the number of hits to the webpage for advertisements displayed on the webpage Content providers (Web servers) can well rely on the existence and correct implementation of caching proxies for their content distribution quality Correct! Caching proxies serve only the ISP’s clients, not all users on the Internet https://umkc.instructure.com/courses/65270/quizzes/64176 7/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Question 14 4 / 4 pts Fb-workload. Which of the following is/are correct about Facebook's unique workload compared to traditional content service (eg. news)? Correct! Frequent access of old content Correct! Little cold data (i.e., mostly either hot or warm data) Correct! Large working set of photos Relatively higher external CDN hit rate Question 15 4.4 / 11 pts Fb-Storage. Which of the following is correct about Facebook storage? (Select all that apply.) ou Answered Haystack is Facebook's own CDN. F4 is for hot data. Correct! F4 uses Reed-Solomon encoding. Haystack is for warm data. Facebook has lots of cold data that is almost never referenced after 3 months typically. Facebook doesn't use external CDN. orrect Answer Both Haystack and f4 do replications of photo data for failure-resiliency (reliability). https://umkc.instructure.com/courses/65270/quizzes/64176 8/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing orrect Answer Haystack does higher fact of replication than f4, and provides a better fault-tolerance. Correct! Facebook photos are stored as objects. Correct! Haystack uses RAID 6. F4 is a new Facebook storage system that replaces Haystack storage. Question 16 3.75 / 5 pts CDN-explanation. Which of the following is correct about CDN? Correct! CDN reduces origin web server's load as well as users' perceived latency. Correct! Akamai is an example of CDN. orrect Answer Content providers are CDN's customers. By using CDN, content providers can't get information on accounting or user demands. Correct! It is an overlay network used to distribute content from origin servers to users in various geographic locations. Question 17 0 / 3 pts https://umkc.instructure.com/courses/65270/quizzes/64176 9/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing CDN-redirection. Which of the following is NOT correct about CDN redirection techniques? URL based request routing – consistent hashing orrect Answer Broadcast-based distribution URL rewriting ou Answered DNS based request routing Question 18 3 / 5 pts VN layer. Which protocol layer can a virtual network be implemented? (Select all that apply.) orrect Answer layer 4 - transport layer orrect Answer layer 5 - application layer Correct! layer 2 - link/LAN layer Correct! layer 3 - network layer Correct! layer 1 - physical layer Question 19 3 / 3 pts VLAN. Which of the following is NOT about VLAN? Static switch port based VN https://umkc.instructure.com/courses/65270/quizzes/64176 10/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing 802.1Q tagging Correct! IP Tunneling Dynamic MAC address based VN Question 20 2 / 3 pts Network virtualization techniques. True/False about Network virtualization Correct! Network virtualization is Flase only done in layer 3 - network layer. Correct! 801.1Q tagging can True support a limited number of VLANs (only 2^12) ou Answered 801.1Q tagging only Flase works at layer 2. Correct Answer True Question 21 0 / 3 pts Network virtualization concept. Which of the following is not correct about network virtualization? ou Answered It can save the cost through network resource pooling/sharing. https://umkc.instructure.com/courses/65270/quizzes/64176 11/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing It allows to share computing, storage, and networking resources for different applications. orrect Answer It is required to support multi-tenant environments. It can enable to run/test new protocols and applications. Question 22 5 / 5 pts Google's latest custom DC cluster fabric. What is the latest Google's latest custom DC cluster fabric? (Capitalize only the first letter for automatic grading) Correct! Jupiter Question 23 2 / 4 pts SDN. Which of the following is/are correct about Software-Defined Networking (SDN)? (Select all that apply.) ou Answered It is only for LAN rather than WAN Correct! Network services like Routing or Firewall would be applications running on top of a controller. Correct! Openflow is the de-facto standard protocol used in SDN. It is still in academic stage and not used in public clouds yet. https://umkc.instructure.com/courses/65270/quizzes/64176 12/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Question 24 0 / 5 pts Data protection location/time. "Data actively moving from one location to another such as across the Internet or through a private network." is called ( ) protection. (Write in all lowercase letters for automatic grading.) ou Answered data in transit / data in flight orrect Answers in-flight in-motion in-transit Question 25 5 / 5 pts OpenFlow - explanation. Explain briefly how OpenFlow works? Your Answer: OpenFlow is an open standard for a communication protocol that enables the control plane to break off and interact with the forwarding plane of multiple devices from some central point, decoupling roles for highest functionality and programmability. Question 26 4 / 5 pts Within the scope of this exam, make a non-trivial exam "multiple- choice" question on your own and answer it. This is to show your knowledge, not covered in the problems below. (no true/false question; 4 or more choices) https://umkc.instructure.com/courses/65270/quizzes/64176 13/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Your Answer: Ques : Which of the following is FALSE about RAID-6 ? A: Read performance is low. B: Write performance is High. C: Cost is Low. D: Supports Data Protection. Answer : Option A. write performance is higher than ?? Question 27 5 / 5 pts Within the scope of this exam, make a non-trivial exam "descriptive" question on your own and answer it. This is to show your knowledge, not covered in the problems below. Your Answer: Define Moore's Law and Give some limitations. Moore's Law : Moore's law states that the number of transistors on a microchip doubles every 2 years, though the cost of computer is halved. Limitations : 1: Moore's law depends on shrinking of the transistors and here the law of physics intervene. Electron tunneling prevents the length of a gate - the part of a transistor that turns the flow of electrons on or off from being smaller than 5nm. 2: Smaller transistors will extract heat resulting malfunctions. https://umkc.instructure.com/courses/65270/quizzes/64176 14/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing Question 28 1 / 1 pts Self-assessment. Do the following self-assessment of your course work: (Be honest!) (Anyone who answers will get the point) (Write numbers either 1, 2, 3, 4, or 5 only. Otherwise, it will be automatically marked as wrong.) 4 Your effort for the course? Outstanding (more than 15 hours a week) (5) Great (more than 10 hours a week) (4) Good enough effort (more than 9 hours a week) (3) Below Average (more than 5 hours but less than 9 hours a week) (2) Limited Effort (less than 5 hours a week) (1) 4 How regularly are you studying for the course? Very much/Every day (5) Every other day (4) Twice a week (3) Once a week (2) Only before the exam (1) 4 Your growth and learning development from the beginning of the semester till now? Outstanding (5) ……………………… Below Average (1) Answer 1: Correct! 4 orrect Answer 1 orrect Answer 2 orrect Answer 3 https://umkc.instructure.com/courses/65270/quizzes/64176 15/16 05/05/2021 2021 Spring CC Exam2 (4/8 1pm) (Remotely Proctored): Computer Science 5525 0001 Cloud Computing orrect Answer 5 Answer 2: Correct! 4 orrect Answer 1 orrect Answer 2 orrect Answer 3 orrect Answer 5 Answer 3: Correct! 4 orrect Answer 1 orrect Answer 2 orrect Answer 3 orrect Answer 5 Quiz Score: 76.48 out of 108 https://umkc.instructure.com/courses/65270/quizzes/64176 16/16