Entity instance Study guides, Class notes & Summaries

ICT2622 Assingment 1 2024 memo In UML notation, the guillemets character is used to show what kind of notation?​ a. Stereotypes b. Relationships c. Subordinates d. Classes Question 2 What is usually the end result of an iteration?​ a. A piece of working code b. The final system c. A set of specifications d. A project plan Question 3 An information system development process that emphasizes flexibility to embrace change is called __________. a. itera...

VERSION A What does modality refer to? How does it appear on ER diagram? - ANSWER- Refers to the MINIMUM number of times an instance in one entity can be associated with instance of another entity (minima) Appears as a 0 or 1 on the relationship line, next to cardinality Define: Referential Integrity - ANSWER- Requires that ALL foreign key values must either be fully NULL or match some primary key value 4 Ways Referential Integrity can be violated: - ANSWER- 1. Primary key is updated 2...

Chapter 2 – Cryptographic Tools TRUE/FALSE QUESTIONS: T F 1. Symmetric encryption is used primarily to provide confidentiality. T F 2. Two of the most important applications of public-key encryption are digital signatures and key management. T F 3. Cryptanalytic attacks try every possible key on a piece of ciphertext until an intelligible translation into plaintext is obtained. T F 4. The secret key is input to the encryption algorithm. T F 5. Triple DES tak...

A Primary Key having the fewest number of attributes to make it unique is called. correct answer: Minimization If the child entity requires the primary key of the parent entity for its unique identity, then you create ______. correct answer: Identifying Relationship If each child record has a unique identifier of its own, then the relationship is know as a _______. correct answer: Non-Identifying Relationship Entities that have no foreign keys in their pk. correct answer: Independen...

Chapter 11 Prometheus - ANSWERSLearning Forms What are databases best at doing? - ANSWERSStoring data What is Microsoft access? - ANSWERSA database application What is the company prometheus pulls a lot of data from and what does it do? - ANSWERSQuickStove, LLC, a small company that sells emergency preparedness and backpacking equipment What are the 4 types of objects in access, and what is each's function? - ANSWERSTables- are used to store the data in Access Queries-are used to f...

Chapter 3: Data Models TRUE/FALSE 1. A data model is usually graphical. ANS: T PTS: 1 2. The terms data model and database model are often used interchangeably. ANS: T PTS: 1 3. An implementation-ready data model should contain a description of the data structure that will store the end-user data. ANS: T PTS: 1 4. Within the database environment, a data model represents data structures with the purpose of supporting a specific problem domain. ANS: T PTS: 1 5. Data modeling starts with a...

ICT2621 2023 Assignment 3 solution Questions: Question 1 NB: When drawing data flow diagrams (DFDs), use the Gane and Sarson symbols/notation set. 1.1 Draw, name and describe the four symbols used in a data flow diagram (DFD). You may use a table to present your answer. (6) 1.2 Briefly describe the following with respect to DFDs: 1.2.1 Levelling(2) 1.2.2 Balancing(2) 1.2.3 Data dictionary(2)1.3 Draw a diagram of an example of each of the following showing the process, and the input(s...

WGU C175 EXAM | WGU D426 DATA MANAGEMENT FOUNDATIONS OA EXAM 2024 ACTUAL EXAM 2 LATEST VERSIONS 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) ALREADY GRADED A+ What does modality refer to? How does it appear on ER diagram? - ANSWER- Refers to the MINIMUM number of times an instance in one entity can be associated with instance of another entity (minima) Appears as a 0 or 1 on the relationship line, next to cardinality

WGU D426 Objective Assessment V2 (Latest 2024/ 2025 Update) Data Management Foundations | Questions and Verified Answers|100% Correct| Grade A Q: SUBQUERY Sometimes nested query or inner query, which is a query within another SQL query Q: ALIAS Answer: Temporary name assigned to a column or table Q: Flattening Answer: Replaces a subquery with an equivalent join Q: Entity Answer: Person, place, product, concept, or activity Q: Relationship Answer: A st...

MISY 5335 Questions and Answers Already Passed Why Use a Database? Databases are essential for organizing and managing information efficiently. The relational database is the most common type, although nonrelational databases (popular in online platforms like Facebook and Twitter) are increasingly prevalent. What are the Issues with Using Lists? Using lists can lead to problems when making modifications, such as inconsistencies in data updates. Modification Issue Occurs when stori...