Proiectarea Bazelor De Date

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| By Lilip
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Lilip
Community Contributor
Quizzes Created: 2 | Total Attempts: 12,424
| Attempts: 1,022
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  • 1/9 întrebări

    Unele atribute trebuie neaparat sa aiba valoare. Acestea se numesc :

    • Mandatorii (obligatorii)
    • Optionale
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  • 2. 

    Care dintre urmatoarele variante nu poate reprezenta un atribut al entitatii ELEV : 

    • Nume

    • Adresa

    • Consum

    • Prenume

    Correct Answer
    A. Consum
    Explanation
    The attribute "consum" cannot represent an attribute of the entity "ELEV" because "consum" does not seem to be a characteristic or property that is typically associated with a student. Attributes like "nume" (name), "adresa" (address), and "prenume" (first name) are more commonly associated with a student entity. However, "consum" does not provide any relevant information about a student and does not fit the context of the entity "ELEV".

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  • 3. 
    Ce semnificatie are "piciorul de cioara" in cadrul unui ERD? - ProProfs

    Ce semnificatie are "piciorul de cioara" in cadrul unui ERD?

    • Relatia este obligatorie

    • Relatia este optionala

    • Pot exista una sau mai multe instante ale entitatii langa care apare semnul in relatie cu o instanta a celeilalte entitati

    • Niciuna din variantele anterioare

    Correct Answer
    A. Pot exista una sau mai multe instante ale entitatii langa care apare semnul in relatie cu o instanta a celeilalte entitati
    Explanation
    The "piciorul de cioara" symbol in an ERD indicates that there can be one or more instances of an entity next to which the symbol appears in relation to an instance of the other entity. This means that the relationship between the entities is one-to-many, where one instance of the first entity can be associated with multiple instances of the second entity.

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  • 4. 

    O entitate este de obicei :

    • Un verb

    • Substantiv

    • Un adverb

    • Orice cuvant

    Correct Answer
    A. Substantiv
    Explanation
    An entity is typically a noun. Nouns are words that represent a person, place, thing, or idea. In this context, an entity refers to something that exists or can be identified. Verbs, adverbs, and any other word types do not typically represent entities in the same way that nouns do. Therefore, the correct answer is substantiv.

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  • 5. 
    Cum se citeste corect relatia dintre CLIENT si MASINA? - ProProfs

    Cum se citeste corect relatia dintre CLIENT si MASINA?

    • Fiecare CLIENT poate sa inchirieze o MASINA si numai una.

    • Fiecare CLIENT trebuie sa inchirieze o MASINA si numai una.

    • Fiecare CLIENT poate sa inchirieze una sau mai multe MASINI.

    • Fiecare CLIENT trebuie sa inchirieze una sau mai multe MASINI.

    Correct Answer
    A. Fiecare CLIENT poate sa inchirieze una sau mai multe MASINI.
    Explanation
    Each CLIENT can rent one or more CARS.

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  • 6. 
    Care dintre urmatoarele  fraze poate fi citita din schema alaturata: - ProProfs

    Care dintre urmatoarele  fraze poate fi citita din schema alaturata:

    • Un student poate sa urmeze mai multe cursuri

    • Un curs poate fi urmat de mai multi studenti.

    • Un student trebuie sa urmeze un singur curs.

    • Un curs trebuie sa fie urmat de un student.

    Correct Answer
    A. Un curs poate fi urmat de mai multi studenti.
    Explanation
    The given answer, "Un curs poate fi urmat de mai multi studenti," can be inferred from the diagram because it states that a course can be taken by multiple students. This is supported by the arrows connecting the "Curs" node to multiple "Student" nodes in the diagram.

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  • 7. 

    Relatia:  

    • Reprezinta ceva semnificativ pentru afacere

    • Exprima care sunt legaturile intre doua entitati (sau intre una si aceeasi entitate).

    • Se citeste in ambele sensuri

    • Are optionalitate

    • Toate celelalte variante

    • Are un grad de cardinalitate

    Correct Answer
    A. Toate celelalte variante
  • 8. 

    Atributul este: (alegeti variantele corecte)

    • Este o proprietate a unei entitati sau un detaliu referitor la acesta.

    • Descrie, cuantifica, califica, clasifica sau specifica o entitate

    • Are un tip care poate fi un numar, un sir de caractere, o data calendaristica, o imagine, etc.

    Correct Answer(s)
    A. Este o proprietate a unei entitati sau un detaliu referitor la acesta.
    A. Descrie, cuantifica, califica, clasifica sau specifica o entitate
    A. Are un tip care poate fi un numar, un sir de caractere, o data calendaristica, o imagine, etc.
    Explanation
    The correct answer includes three statements that describe the attribute. First, an attribute is a property or detail related to an entity. Second, it describes, quantifies, qualifies, classifies, or specifies an entity. Third, it has a type that can be a number, a string of characters, a calendar date, an image, etc. These statements collectively define what an attribute is and its characteristics.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 07, 2018
    Quiz Created by
    Lilip
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