← CS403 - Database Management Systems OverviewChapter 2

Ch 02: Data and Information

24 Questions24 MCQs0 Short Questions0 Long Questions
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Showing 21 – 24 of 24 Questions
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Q21
❓ MCQ📘 CS403📑 Lec 2🏷️ 2.2. Entity-Relationship (ER) DiagramEasy🔁⭐💡📄🎓VU🏛️VU
In an Entity-Relationship (ER) model, an entity is defined as ________.
  1. A.a 'thing' which has either a real physical existence (e.g. a car or a student) or a conceptual existence (e.g. a course)
  2. B.a real physical 'thing' or a conceptual 'thing' that is specific to a particular database management system
  3. C.a real physical 'thing' that is specific to a particular database management system
  4. D.an operational transaction process defined within a relational system
Q22
❓ MCQ📘 CS403📑 Lec 2🏷️ 2.2. Entity-Relationship (ER) DiagramEasy🔁⭐💡📄🎓VU🏛️VU
In an Entity-Relationship (ER) diagram representing an optional one-to-many relationship between Student and Car, what does the cardinality notation indicate?
  1. A.that a student can own 0, 1 or many cars
  2. B.a car can be owned by many students
  3. C.a student cannot own a car
  4. D.a student can own many cars and a car can be owned by many students
Q23
❓ MCQ📘 CS403📑 Lec 2🏷️ 2.2. Entity-Relationship (ER) DiagramEasy🔁⭐💡📄🎓VU🏛️VU
In database modeling, what is an entity instance?
  1. A.a particular occurrence of an entity
  2. B.a special type of relation
  3. C.a global schema definition
  4. D.a physical file allocation block
Q24
❓ MCQ📘 CS403📑 Lec 2🏷️ 2.3. Enhanced ER Diagrams and Weak EntitiesMedium🔁⭐💡📄🎓VU🏛️VU
Which of the following statements is true regarding a weak entity type in an Entity-Relationship (ER) model?
  1. A.must have total participation in an identifying relationship
  2. B.does not have a primary key attribute(s) of its own
  3. C.both (a) and (b)
  4. D.none of the above

📖 Related CS403 - Database Management Systems Curriculum Units

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View All CS403 - Database Management Systems Chapters →
Ch 01: Introduction to Databases25 QsIntroduction to Databases & File SystemsPracticeData vs Information & DBMS AdvantagesPracticeCh 03: File Systems vs Databases6 QsThree-Level Database ArchitecturePracticeCh 04: Three-Level Database Architecture27 Qs