Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 3, Problem 3.28RQ
Write an SQL statement to count the number of pets.
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Refer to page 302 for a dataset and feature descriptions.
Instructions:
Analyze the dataset and identify the most important features for prediction using provided
statistical metrics.
• Discuss how removing certain features might affect the accuracy and interpretability of models.
Propose a feature selection strategy based on the given data.
Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]
Refer to page 206 for clustering results of a dataset.
Instructions:
• Assess the quality of the clusters using metrics such as silhouette score or intra-cluster variance.
• Identify any issues with the clustering results, such as overlapping or poorly defined clusters.
•
Suggest ways to improve clustering performance, such as feature selection or scaling.
Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]
Refer to page 304 for a system architecture diagram and potential threats.
Instructions:
•
°
Identify and categorize threats using STRIDE (Spoofing, Tampering, Repudiation, Information
Disclosure, Denial of Service, Elevation of Privilege).
Discuss the impact of each threat on system components.
•
Suggest mitigation strategies for the most critical threats.
Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]
Chapter 3 Solutions
Database Concepts (8th Edition)
Ch. 3 - Prob. 3.1RQCh. 3 - What is a data sublanguage?Ch. 3 - Prob. 3.3RQCh. 3 - Prob. 3.4RQCh. 3 - Prob. 3.5RQCh. 3 - Why do some standard SQL-92 statements fail to run...Ch. 3 - Use the following tables for your answers to...Ch. 3 - Write an SQL CREATE TABLE statement to create the...Ch. 3 - Prob. 3.9RQCh. 3 - Prob. 3.10RQ
Ch. 3 - Prob. 3.11RQCh. 3 - Is PET or PET_2 a better design? Explain your...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - Prob. 3.15RQCh. 3 - Prob. 3.16RQCh. 3 - Prob. 3.17RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Prob. 3.19RQCh. 3 - Prob. 3.20RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Write an SQL statement to display the name, breed,...Ch. 3 - Write an SQL statement to display the pet ID,...Ch. 3 - Prob. 3.24RQCh. 3 - Prob. 3.25RQCh. 3 - Write an SQL statement to display the name and...Ch. 3 - Prob. 3.27RQCh. 3 - Write an SQL statement to count the number of...Ch. 3 - Write an SQL statement to count the number of...Ch. 3 - Prob. 3.30RQCh. 3 - Prob. 3.31RQCh. 3 - Prob. 3.32RQCh. 3 - Prob. 3.33RQCh. 3 - Answer question 3.33, but do not consider any pet...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write SQL statements to (1) create the BREED...Ch. 3 - Prob. 3.38RQCh. 3 - Prob. 3.39RQCh. 3 - Prob. 3.40RQCh. 3 - Write an SQL statement to display the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Write an SQL statement to change the value of Std....Ch. 3 - Explain what will happen if you leave the WHERE...Ch. 3 - Prob. 3.46RQCh. 3 - Prob. 3.47RQCh. 3 - Prob. 3.48RQ
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- Refer to page 207 for a user interface design specification. Instructions: • Evaluate the design using Nielsen's usability heuristics. • Identify potential usability issues and categorize them based on severity. • Propose specific design improvements to address these issues. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 205 for system logs of a distributed service. Instructions: • Analyze the logs to identify faults (e.g., node crashes, communication failures). Propose fault-tolerance mechanisms such as replication or consensus algorithms to handle these faults. Discuss the trade-offs between fault tolerance and system performance. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 303 for a blockchain network's transaction history. Instructions: • Evaluate the network's performance under different consensus mechanisms (e.g., Proof of Work, Proof of Stake). • Identify issues such as transaction delays or energy inefficiency. • Propose a suitable consensus mechanism for the given network characteristics. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]arrow_forward
- Refer to page 208 for search query results and relevance judgments. Instructions: Analyze the relevance judgments to evaluate the effectiveness of the initial query. • Discuss how relevance feedback could refine the search results. • Propose modifications to the query or ranking algorithm based on user feedback. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 300 for failure rate data of a software system. Instructions: • Analyze the provided failure rate data using software reliability models (e.g., Jelinski-Moranda, Goel-Okumoto). Compare the predictions of each model for system reliability over time. Discuss which model is more appropriate based on the dataset characteristics. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440AZF/view?usp=sharing]arrow_forwardRefer to page 201 for a requirements specification document. Instructions: Evaluate the listed requirements and categorize them into functional and non-functional. Prioritize the requirements using the MOSCOW method (Must have, Should have, Could have, Won't have). Justify your prioritization choices based on the project's context. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440AZF/view?usp=sharing]arrow_forward
- Refer to page 200 for memory access traces. Instructions: • Analyze the given memory access traces. Compare the performance of page replacement algorithms (e.g., FIFO, LRU, Optimal) for the dataset. Discuss the impact of page faults and frame size on overall system performance. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440AZF/view?usp=sharing]arrow_forwardRefer to page 204 for network throughput logs. Instructions: . • Analyze the logs to evaluate the effectiveness of congestion control mechanisms (e.g., TCP Reno, TCP Vegas). Identify periods of congestion and discuss how the mechanisms respond. • Propose adjustments to improve throughput and reduce latency. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 209 for a description of a key distribution system. Instructions: • Evaluate the security and scalability of the key distribution mechanism described. Identify potential vulnerabilities, such as key leakage or compromise. • Suggest improvements to strengthen the key management process. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZF/view?usp=sharing]arrow_forward
- Refer to page 203 for search problem details and heuristic functions. Instructions: • Evaluate the provided heuristic functions for the given search problem. • Determine whether each heuristic is admissible and/or consistent. • Explain how the choice of heuristic affects the efficiency of search algorithms like A*. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 202 for resource allocation graphs. Instructions: • Examine the provided resource allocation graphs to determine if a deadlock exists. • If a deadlock is detected, identify the processes and resources involved. • Propose a strategy to resolve the deadlock, such as resource preemption or process termination. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS31Z9qoHazb9tC440AZF/view?usp=sharing]arrow_forwardYou have database for EDMDB that contains two table as describing below: tbUser: create table tbUser (UserID int primary key auto_increment, UserName varchar(100) not null, password varchar(20), level int default 3, regDate date); UserID(P.K.) UserName 1 Ali 2 Sara 3 Jasim Password Level 1234 1 regDate 1-10-2018 1234 2 1-11-2018 1234 1 15-11-2018 Q1-Create TbDoc as describe above. Q2: insert the data in to the table as a variable data? Q3: delete user who name is Jasim. Q4: update to change each values of Password from 1234 to 4321? Q5: delete each record from tbUser when Level is 2? Good Luck!arrow_forward
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