Test Your Knowledge
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Test Your Knowledge

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Questions and Answers

Which normal form requires that there are no transitive dependencies?

  • Boyce-Codd normal form (BCNF)
  • Second normal form (2NF)
  • Third normal form (3NF) (correct)
  • First normal form (1NF)

    • What is the purpose of a dependency diagram?

  • To depict all relationships among table's attributes (correct)
  • To eliminate multi-valued attributes
  • To identify all dependencies
  • To identify the primary key

    • In the unnormalized dataset, why is it not in 1NF?

  • Because it has composite keys
  • Because it has transitive dependencies
  • Because it has repeating groups
  • Because it has multi-valued attributes (correct)

    • What is the attribute known as when it fully functionally depends on a composite key?

    <p>Determinant attribute</p> Signup and view all the answers

    Which of the following best describes normalization in the database design process?

    <p>Evaluating and correcting table structures to minimize data redundancies</p> Signup and view all the answers

    Which normal form assigns attributes to tables based on determination?

    <p>Second normal form (2NF)</p> Signup and view all the answers

    Denormalization results in increased performance and greater data redundancy.

    <p>True</p> Signup and view all the answers

    Which of the following is NOT one of the normal forms mentioned in the text?

    <p>Fourth normal form (4NF)</p> Signup and view all the answers

    Which attribute represents the number of hours an employee worked on a specific project?

    <p>HOURS</p> Signup and view all the answers

    What does the CHG_HOUR attribute represent?

    <p>The amount charged per hour for a job</p> Signup and view all the answers

    What is the purpose of normalization in database design?

    <p>To eliminate data redundancies</p> Signup and view all the answers

    What is a surrogate key?

    <p>A numeric value automatically incremented for each new row</p> Signup and view all the answers

    Which term describes a functional dependence in which an attribute depends on only part of the primary key?

    <p>Partial dependency</p> Signup and view all the answers

    In the 'Students' table, what attribute is fully functionally dependent on 'StudentID'?

    <p>StudentAdvisor</p> Signup and view all the answers

    In the 'Students' table, what attribute is partially dependent on 'StudentID'?

    <p>StudentMajor</p> Signup and view all the answers

    What term describes a functional dependence among nonprime attributes?

    <p>Transitive dependency</p> Signup and view all the answers

    In the 'Students' table, what attribute is indirectly dependent on 'StudentID' through 'MajorName'?

    <p>Department</p> Signup and view all the answers

    Which normal form describes a tabular format in which all key attributes are defined, there are no multi-valued attributes, and all attributes are dependent on the primary key?

    <p>First Normal Form (1NF)</p> Signup and view all the answers

    What is the purpose of converting a table from First Normal Form (1NF) to Second Normal Form (2NF)?

    <p>To eliminate partial dependencies</p> Signup and view all the answers

    In Second Normal Form (2NF), what type of dependencies should be eliminated by creating new tables?

    <p>Transitive dependencies</p> Signup and view all the answers

    What is the purpose of converting a table from Second Normal Form (2NF) to Third Normal Form (3NF)?

    <p>To eliminate transitive dependencies</p> Signup and view all the answers

    Which of the following statements is true about the normalization process?

    <p>Normalization breaks down a relation into a new set of relations.</p> Signup and view all the answers

    What is the objective of the normalization process?

    <p>To ensure that each table conforms to the concept of well-formed relations.</p> Signup and view all the answers

    In the first example given, why is 'EmployeeName' not fully functionally dependent on 'EmployeeID'?

    <p>Because 'EmployeeName' can also be determined by the 'Department' attribute.</p> Signup and view all the answers

    In the second example given, why is 'EmployeeName' fully functionally dependent on 'EmployeeID'?

    <p>Because 'EmployeeName' is not determined by any other attribute.</p> Signup and view all the answers

    According to the data-modeling checklist, what should attribute names be?

    <p>Unique within the entity</p> Signup and view all the answers

    According to the data-modeling checklist, what should entity names be?

    <p>Nouns familiar to business</p> Signup and view all the answers

    According to the data-modeling checklist, what should relationship names be?

    <p>Active or passive verbs</p> Signup and view all the answers

    According to the data-modeling checklist, what should entities represent?

    <p>A set of distinguishable entity instances</p> Signup and view all the answers

    According to the data-modeling checklist, what should be clearly defined for each entity?

    <p>PK</p> Signup and view all the answers

    According to the data-modeling checklist, what should be included in the naming conventions for entity names?

    <p>Abbreviations, synonyms, and aliases</p> Signup and view all the answers

    According to the data-modeling checklist, what should attribute names be?

    <p>Descriptive of the characteristic</p> Signup and view all the answers

    According to the data-modeling checklist, what should entity names be?

    <p>Familiar to business</p> Signup and view all the answers

    According to the data-modeling checklist, what should relationship names be?

    <p>Active or passive verbs</p> Signup and view all the answers

    What should be clearly defined for each entity according to the data-modeling checklist?

    <p>Granularity of the entity instance</p> Signup and view all the answers

    According to the data-modeling checklist, what should entities represent?

    <p>A single subject</p> Signup and view all the answers

    What should attribute names use as a prefix according to the data-modeling checklist?

    <p>Entity abbreviation</p> Signup and view all the answers

    What should not be contained in attribute names according to the data-modeling checklist?

    <p>Reserved words</p> Signup and view all the answers

    What should be unique within the model according to the data-modeling checklist?

    <p>Entity names</p> Signup and view all the answers

    What should not be a reserved word according to the data-modeling checklist?

    <p>Attribute names</p> Signup and view all the answers

    What should document abbreviations, synonyms, and aliases for each entity according to the data-modeling checklist?

    <p>Entity names</p> Signup and view all the answers

    ما هي الخطوة التالية بعد تحديد التخطيط المطلوب من القائمة؟

    <p>النقر على الرمز للكشف عن التخطيطات المتاحة</p> Signup and view all the answers

    ما هو الرمز الذي يجب النقر عليه لتغيير عدد الشاشات؟

    <p>الرمز في الزاوية العلوية اليسرى</p> Signup and view all the answers

    كم عدد الكاميرات المعروضة على الشاشة عند عرض كاميرا واحدة؟

    <p>1</p> Signup and view all the answers

    ما هو الرمز الذي يجب النقر عليه لتحديد عدد نوافذ العرض؟

    <p>الرمز في الزاوية العلوية اليسرى</p> Signup and view all the answers

    كم عدد الكاميرات المعروضة على الشاشة عند عرض 6 كاميرات؟

    <p>6</p> Signup and view all the answers

    ما هو التصنيف الذي يستخدم لهذا النظام؟

    <p>تصنيف ADNOC الداخلي</p> Signup and view all the answers

    ما هو الهدف من تدريب مشغلي ومشرفي غرفة التحكم وأنظمة المرئية؟

    <p>تدريب المشغلين والمشرفين على استخدام غرفة التحكم وأنظمة المرئية</p> Signup and view all the answers

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