Baze Podataka Drugi Kol

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| By Jozef.1994
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Jozef.1994
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  • 1/60 Questions

    Višestruke zapise, u tabeli koju select upit vraća kao odgovor,eliminišemo klauzulom

    • UNION
    • ALL
    • DISTINCT
    • UNLIKE
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Baze Podataka Drugi Kol - Quiz

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  • 2. 

    Pravila integriteta se definisu u okviru

    • Baze podataka

    • Aplikacije

    • Operativnog sistema

    • Ne definisu se

    Correct Answer
    A. Baze podataka
    Explanation
    The correct answer is "baze podataka" because integrity rules are defined within a database. These rules ensure that the data in the database remains accurate, consistent, and valid. By defining integrity rules, the database can enforce constraints on data entry and manipulation, preventing any unauthorized or incorrect changes to the data. Therefore, the integrity rules are an essential part of the database management system.

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  • 3. 

    Opsti oblik select upita glasi

    • Select,From,Having,Order by,Group by,Where

    • Select,From,Having,Group by,Where,Order by

    • Select,From,Where,Order by,Group by,Having

    • Select,From,Where,Group by,Having,Order by

    Correct Answer
    A. Select,From,Where,Group by,Having,Order by
    Explanation
    The correct answer is "Select,From,Where,Group by,Having,Order by". This is the correct order of the keywords in a general form of a select query. "Select" is used to specify the columns to be retrieved, "From" is used to specify the table from which the data is retrieved, "Where" is used to specify the conditions for retrieving the data, "Group by" is used to group the data based on certain columns, "Having" is used to specify conditions on the grouped data, and finally "Order by" is used to specify the sorting order of the retrieved data.

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  • 4. 

    Digitalna slika realnog dela sveta, koja je od značaja za informacioni sistem je

    • Podatak

    • Model-objekat

    • Atribut

    • Zapis

    Correct Answer
    A. Model-objekat
    Explanation
    A digital image of a real-world object that is significant for an information system is referred to as a model-object. This term implies that the image represents a specific object or entity in the real world and is used within an information system to provide a representation or simulation of that object. This can be useful for various purposes such as visualization, analysis, or manipulation of the object within the information system.

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  • 5. 

    Kardinalnost relacije je

    • Broj atributa koji čine složen primarni ključ

    • Skup dozvoljenih vrednosti primarnog ključa

    • Broj dozvoljenih vrednosti primarnog ključa

    • broj n-torki jedne tabele koji su u relaciji sa jednom n-torkom druge tabele

    Correct Answer
    A. broj n-torki jedne tabele koji su u relaciji sa jednom n-torkom druge tabele
    Explanation
    The correct answer is "broj n-torki jedne tabele koji su u relaciji sa jednom n-torkom druge tabele." This answer refers to the cardinality of a relationship, which is the number of tuples from one table that are related to one tuple from another table.

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  • 6. 

    Data je tabela tab1 sa atributom ime. Koji upit vraća spisak svih imena koja sadržemala slova "a" i "b" ?

    • SELECT ime FROM tab1 WHERE ime LIKE "%a%b%" OR ime LIKE "%b%a%";

    • SELECT ime FROM tab WHERE ime LIKE ""a?b?" OR ime LIKE "?b?a?";

    • SELECT ime FROM tab WHERE ime LIKE "%a%b%";

    • SELECT ime FROM tab WHERE ime LIKE '%b%a%";

    Correct Answer
    A. SELECT ime FROM tab1 WHERE ime LIKE "%a%b%" OR ime LIKE "%b%a%";
    Explanation
    The correct answer is the first option: SELECT ime FROM tab1 WHERE ime LIKE "%a%b%" OR ime LIKE "%b%a%". This query uses the LIKE operator with wildcard characters (%) to search for all names that contain both the letters "a" and "b". The OR operator is used to include names that have "a" followed by "b" or "b" followed by "a".

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  • 7. 

    Postupak dekompozicije tabeia s ciljem postizanja dobrih osobina relacionog modela iuklanjanja moguće pojave nekontrolisane redundanse je

    • Diskretizacija

    • Dekompozicija

    • Normalizacija

    • Projekcija

    Correct Answer
    A. Normalizacija
    Explanation
    The correct answer is "normalizacija." Normalizacija je postupak dekompozicije tabele s ciljem postizanja dobrih osobina relacionog modela i uklanjanja moguće pojave nekontrolisane redundanse. Ovaj postupak se koristi kako bi se osigurala strukturalna integritet baze podataka i smanjila redundancija podataka. Normalizacija pomaže u organizaciji podataka na način koji olakšava upite, smanjuje mogućnost grešaka i održava doslednost podataka.

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  • 8. 

    Domen atributa je

    • Iskaz definisan jednom prostom recenicom

    • Novi podatak koji poseduje relevantnu novinu, neko novosaznanje, a rezultat je obrada poznatih podataka

    • Nesto sto postoji i sto se moze jednoznacno identifikovati

    • Skup dozvoljenih vrednosti koje neki atribut moze uzeti

    Correct Answer
    A. Skup dozvoljenih vrednosti koje neki atribut moze uzeti
    Explanation
    The correct answer is "Skup dozvoljenih vrednosti koje neki atribut moze uzeti" which translates to "The set of allowed values that an attribute can take." This explanation aligns with the concept of attribute domain in database management systems, where an attribute is defined by a set of possible values it can have.

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  • 9. 

    Prilikom prevođenja E-R modela, za binarne veze važi sledeće

    • Binarne veze tipa 1:1 i 1:N se iskazuju spoljnim kijučem a veze tipa M:N veznom tabelom

    • Binarne veze tipa 1:1 se iskazuju spoljnim ključem a veze tipa L:N i M:N veznom tabelom

    • Sve binarne veze se iskazuju spoljnim ključem

    • Sve unarne veze se iskazuju veznom

    Correct Answer
    A. Binarne veze tipa 1:1 i 1:N se iskazuju spoljnim kijučem a veze tipa M:N veznom tabelom
    Explanation
    When translating an E-R model, binary relationships of type 1:1 and 1:N are expressed using foreign keys, while relationships of type M:N are expressed using a junction table. This means that for 1:1 and 1:N relationships, the foreign key is used to establish the connection between the entities, while for M:N relationships, a separate table is created to represent the relationship.

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  • 10. 

    Date su tabele :radnik <me, brod> sa 1000 zapisa iodeljenje <drod, imeod> sa 100 zapisa. SOL upit:SELECT ime, imeod FROM radnik, odeljenjeWHERE radnik.brod = odeljenje.brod AND radnik.ime LIKE "A%"vrši operaciju selekcije nad

    • 100 zapisa

    • 1000 zapisa

    • 1100 zapisa

    • 100000 zapisa

    Correct Answer
    A. 100000 zapisa
    Explanation
    The given SQL query is selecting the columns "ime" and "imeod" from the tables "radnik" and "odeljenje" respectively. It is using a join condition "radnik.brod = odeljenje.brod" to join the two tables. Additionally, it is applying a filter condition "radnik.ime LIKE 'A%'" to select only those records where the "ime" column starts with the letter 'A'. Since the table "radnik" has 1000 records and the table "odeljenje" has 100 records, the result of this query will have a maximum of 1000 records. Therefore, the correct answer is "1000 zapisa".

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  • 11. 

    Imamo definisane objekte RACUN<brojracuna#, iznos,......> i STAVKA <brojstavke#, brojracuna#, kolicina,cijena,....>. Sta je od dole navedenog tacno u E-R modelu?

    • RACUN je cvrsti objekat, a Stavka slabi

    • I RACUN i STAVKA su slabi objekti

    • RACUN i STAVKA su cvrsti objekti

    • RACUN je slabi objekat, a STAVKA cvrsti

    Correct Answer
    A. RACUN je cvrsti objekat, a Stavka slabi
    Explanation
    In the given E-R model, the statement "RACUN je cvrsti objekat, a Stavka slabi" means that "RACUN" is a strong entity and "Stavka" is a weak entity. This implies that "RACUN" has its own independent existence and can exist without any associated "Stavka" entity. On the other hand, "Stavka" depends on the existence of a "RACUN" entity and cannot exist without it.

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  • 12. 

    Koja klauzula je uvek poslednja u SELECT bloku?

    • HAVING

    • GROUP BY

    • WHILE

    • ORDER BY

    Correct Answer
    A. ORDER BY
    Explanation
    The ORDER BY clause is always the last clause in a SELECT statement. It is used to sort the result set based on one or more columns in ascending or descending order. This allows the user to control the order in which the rows are displayed in the final result set.

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  • 13. 

    Ako atribut A1 tabele A jednoznacno identifikuje atribut B1 tabele B, onda za tebele A i B vazi sledece:

    • Nalaze se u vezi 1:1

    • Nalaze se u drugoj normalnoj formi

    • Nalaze se u vezi 1:N

    • Nalaze se u drugoj normalnoj formi

    Correct Answer
    A. Nalaze se u vezi 1:1
    Explanation
    If attribute A1 of table A uniquely identifies attribute B1 of table B, then they are in a 1:1 relationship.

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  • 14. 

    Za razliku od hijerarhijskog modela informacionog sistema, mrežni model dozvoljava

    • Formalno-matematičku interpretaciju tabela

    • Polimorfizam

    • Veze tipa 1:N

    • Veze tipa M:N

    Correct Answer
    A. Veze tipa M:N
    Explanation
    The correct answer is "veze tipa M:N". The explanation for this answer is that unlike the hierarchical model, the network model allows for many-to-many relationships (M:N). In the network model, records are connected through sets of relationships, and each record can have multiple connections to other records. This allows for more flexibility in representing complex relationships between entities in an information system.

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  • 15. 

    Pogled je

    • Neimenovana virtuelna tabela

    • Virtuelna tabela sa imenom

    • Neimenovana fizička tabela

    • Fizička tabela sa imenom

    Correct Answer
    A. Virtuelna tabela sa imenom
    Explanation
    The correct answer is "virtuelna tabela sa imenom." This means that the "Pogled" (view) is a virtual table that has a name. In a database, a view is a virtual table that is based on the result of a query. It allows users to retrieve and manipulate data from multiple tables as if it were a single table. The fact that the view has a name distinguishes it from an unnamed virtual table.

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  • 16. 

    Entiteti su:

    • Skup Baze

    • Elementarni Objekti

    • Tabele

    • Skup tabela

    Correct Answer
    A. Elementarni Objekti
    Explanation
    The correct answer is "Elementarni Objekti" because in the given list of entities, "Elementarni Objekti" is the only option that refers to individual objects or elements. The other options such as "Skup Baze" (database set), "Tabele" (tables), and "Skup tabela" (table set) are more general terms that do not specifically refer to individual objects. Therefore, "Elementarni Objekti" is the most appropriate choice as it represents the specific entities in this context.

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  • 17. 

    Redudansa je

    • Dupliciranje podataka

    • Nekompatibilnost formata fajlova

    • Razdvojenost i izolovanost podataka

    • Zavisnost programa od organizacije podataka

    Correct Answer
    A. Dupliciranje podataka
    Explanation
    The given correct answer, "Dupliciranje podataka" in English means "Data duplication." This refers to the practice of storing multiple copies of the same data in a system. Data duplication can occur due to various reasons such as poor data management, lack of data integration, or redundancy in data storage. Duplicating data can lead to inconsistencies, increased storage requirements, and difficulties in data updates and maintenance.

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  • 18. 

    Posmatraju se objekti RACUN i STAVKA nekog racuna. Objekat STAVKA zavisi od objekta RACUN

    • Samo egzistencijalno

    • Samo identifikacijski

    • Nazavisna je od objekta RACUN

    • Egzistencijalno i identifikacijski

    Correct Answer
    A. Egzistencijalno i identifikacijski
    Explanation
    The given answer is "egzistencijalno i identifikacijski" which means that the object STAVKA depends on the existence and identification of the object RACUN. This implies that the existence of the STAVKA object is tied to the existence of the RACUN object, and the identification of the STAVKA object is determined by the identification of the RACUN object. In other words, without a RACUN object, there can be no STAVKA object, and the identification of the STAVKA object is directly linked to the identification of the RACUN object.

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  • 19. 

    Opšti oblik select upita glasi

    • SELECT lista atributa 1 FROM lista relacija HAVING lista uslova 1 GROUP BY lista atributa 2 WHERE lista uslova 2 ORDER 3Y lista atributa 3

    • SELECT lista atributa 1 FROM lista relacija WHERE lista uslova 1 GROUP BY lista atributa 2 HAVING lista uslova 2 ORDER BY lista atributa 3

    • SELECT lista atributa 1 FROM lista relacija WHERE lista uslova 1 ORDER BY lista atributa 2 GROUP BY lista atributa 3 HAVING lista uslova 2

    • SELECT lista atributa i FROM lista relacija HAVING lista uslova 1 ORDER BY lista atributa GROUP BY lista atributa 3 WHERE lista uslova 2

    Correct Answer
    A. SELECT lista atributa 1 FROM lista relacija WHERE lista uslova 1 GROUP BY lista atributa 2 HAVING lista uslova 2 ORDER BY lista atributa 3
    Explanation
    The correct answer is the third option. In this query, the SELECT statement is used to select the desired attributes from the specified relations. The WHERE clause is used to filter the rows based on certain conditions. The GROUP BY clause is used to group the result set by a specific attribute. The HAVING clause is used to filter the grouped rows based on certain conditions. Finally, the ORDER BY clause is used to sort the result set based on a specific attribute.

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  • 20. 
    Na slici je prikazana koja kardinalnost - ProProfs

    Na slici je prikazana koja kardinalnost

    • 1:1

    • M:M

    • 1:M

    • 3:3

    Correct Answer
    A. 1:1
    Explanation
    The image represents a 1:1 cardinality, which means that each entity on one side of the relationship is associated with only one entity on the other side, and vice versa. This indicates a one-to-one relationship between the entities involved, where each entity has a unique and exclusive connection with another entity.

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  • 21. 

    Indeksi omogućavaju

    • Sekvencijalni pristup podacima u tabeli isključivo putem primarnog ključa

    • Sekvencijalni pristup podacima u tabeli putem atributa koji-su indeksirani

    • Direktan pristup podacima u tabeli isključivo putem primarnog ključa

    • Direktan pristup podacima u tabeli putem atributa koji su indeksirani

    Correct Answer
    A. Direktan pristup podacima u tabeli putem atributa koji su indeksirani
    Explanation
    Indeksi omogućavaju direktan pristup podacima u tabeli putem atributa koji su indeksirani. This means that indexes allow direct access to data in a table through indexed attributes. By indexing specific attributes, the database system can quickly locate the desired data without having to sequentially search through the entire table. This improves the efficiency of data retrieval operations.

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  • 22. 

    Anomalije pri upisu, brisanju i izmeni podataka javljajuse kao posledica

    • Nekontrolisane redundanse

    • Horizontalne normalizacije

    • Vertikalne normalizacije

    • Prisustva veza reda većeg od 3

    Correct Answer
    A. Nekontrolisane redundanse
    Explanation
    The correct answer is "nekontrolisane redundanse" (uncontrolled redundancies). This means that anomalies in data entry, deletion, and modification occur as a result of having redundant data that is not properly controlled. Redundancies can lead to inconsistencies and errors in the data, making it difficult to maintain data integrity and accuracy.

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  • 23. 

    Dovoljni i potrebni uslovi koje atribut mora da ispunjava da bi mogao bitikandidat za primami ključ su

    • Jedinstvenost i nepromenljivost

    • nepromenljivost i raspoloživost

    • Jedinstvenost i raspoloživost

    • Jedinstvenost i minimalnost

    Correct Answer
    A. Jedinstvenost i minimalnost
    Explanation
    The correct answer is "jedinstvenost i minimalnost." To be a candidate for a primary key, an attribute must have uniqueness, meaning that each value in the attribute must be distinct and different from any other value in the same attribute. Additionally, it must have minimalness, which means that no subset of the attribute can uniquely identify a tuple in the relation. Therefore, the attribute must be both unique and minimal to be a candidate for a primary key.

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  • 24. 

    U naredbe za rukovanje podacima (Data ManipulationStatements) spadaju

    • Insert, select, delete, update

    • insert, select, grant, revoke

    • Insert, select, alter table, drop table

    • Grant, revoke, alter table, drop table

    Correct Answer
    A. Insert, select, delete, update
    Explanation
    The correct answer is "insert, select, delete, update". These are the common data manipulation statements used in databases. "Insert" is used to add new data into a table, "select" is used to retrieve data from a table, "delete" is used to remove data from a table, and "update" is used to modify existing data in a table. The other options mentioned in the question either include additional statements that are not part of data manipulation or exclude some of the essential data manipulation statements.

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  • 25. 

    Imenovana virtuelna tabela cija se definicija cuva kao objekat u bazi se naziva

    • Pogled

    • Bazna

    • Viruelna

    • Fizicka

    Correct Answer
    A. Pogled
    Explanation
    A named virtual table whose definition is stored as an object in the database is called a "pogled" (view).

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  • 26. 

    Imamo sledece modele:1.relacioni model2.hijerarhijski i mrezni model3.objektno orijentisani model4.model zasnovan na programskim jezicimaNavesti redosled kojim su se pojavili od prve generacije do cetvrte:

    • 4,2,1,3

    • 1,3,2,4

    • 4,2,3,1

    • 1,2,3,4

    Correct Answer
    A. 4,2,1,3
    Explanation
    The correct answer is 4,2,1,3. This order represents the chronological appearance of the models from the first generation to the fourth. The relational model (1) was the first to emerge, followed by the hierarchical and network model (2), then the object-oriented model (3), and finally the model based on programming languages (4).

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  • 27. 

    Spoljni kljuc je podskup skupa primarnog kljuca je definicija za:

    • Integritet atributa

    • Integritet domena

    • Integritet entiteta

    • Referencijalni integritet

    Correct Answer
    A. Referencijalni integritet
    Explanation
    Referencijalni integritet je definicija za spoljni ključ koji je podskup skupa primarnog ključa. Ovo znači da kada se koristi spoljni ključ u jednoj tabeli, on mora referisati na postojeći primarni ključ u drugoj tabeli. Ova veza osigurava da se podaci integriteta održavaju u bazi podataka, sprečavajući unos pogrešnih ili nedoslednih podataka.

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  • 28. 

    Veze tipa M:N mogu se realizovati bez vezne tabele u:

    • Hijerarhijskom modelu baze podataka

    • Relacionom modelu baze podataka

    • Mreznom modelu baze podataka

    • Objektnom modelu baze podataka

    Correct Answer
    A. Mreznom modelu baze podataka
    Explanation
    In the network model of a database, relationships between entities are represented by interconnected records, called sets. In this model, M:N relationships can be implemented without the need for a junction table. Instead, each record can directly link to multiple related records. This allows for more flexibility in representing complex relationships between entities. In contrast, the relational model typically requires a junction table to represent M:N relationships.

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  • 29. 

    Date su tabele NASTAVNIK i PREDMET. Pod uslovom da jedan nastavnik može dapredaje više predmeta, između zapisa ovih tabela ostvarene su

    • Unarne veze tipa 1:N

    • Unarne veze tipa 1:1

    • Binarne veze tipa 1:1

    • Binarne veze tipa 1:N

    Correct Answer
    A. Binarne veze tipa 1:N
    Explanation
    The correct answer is "binarne veze tipa 1:N" because it states that there is a binary relationship between the tables NASTAVNIK and PREDMET, where one NASTAVNIK can teach multiple PREDMETs, but each PREDMET is taught by only one NASTAVNIK. This means that the relationship between the two tables is one-to-many, where one NASTAVNIK can be associated with multiple PREDMETs, but each PREDMET can only be associated with one NASTAVNIK.

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  • 30. 

    Vrste entiteta su

    • Primarni, sekundarni, vezni(slabi)

    • Redovi u tabeli

    • Realni entiteti, apstraktni entiteti, tebele, pogledi

    • Realni objekat, apstraktni pojam, dogadaj, asocijacija

    Correct Answer
    A. Realni objekat, apstraktni pojam, dogadaj, asocijacija
    Explanation
    The correct answer includes a list of different types of entities: real objects, abstract concepts, events, and associations. These are all examples of different types of entities that can exist in a system or domain. Real objects refer to tangible physical objects, while abstract concepts are intangible ideas or concepts. Events represent specific occurrences or happenings, and associations refer to relationships or connections between entities.

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  • 31. 

    Ako svaki atribut koji nije ključni potpuno funkcionalno zavisi od primarnog ključa,relacija se nalazi u

    • Prvoj normalnoj formi

    • Drugoj normalnoj formi

    • Trećoj normalnoj formi

    • četvrtoj normalnoj formi

    Correct Answer
    A. Drugoj normalnoj formi
    Explanation
    The given statement suggests that every non-key attribute in the relation is functionally dependent on the primary key. This condition satisfies the requirements of the second normal form (2NF). In 2NF, all non-key attributes must be functionally dependent on the entire primary key, rather than just a portion of it. Therefore, the relation is in the second normal form.

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  • 32. 

    Prema Codd-u, pravila integriteta baze podataka definišu se na sledećim mestima

    • Referencijalni integritet u bazi podataka a integritet entiteta u aplikaciji

    • Referencijaini integritet u aplikaciji a integritet entiteta u bazi podataka

    • I referencijalni integritet i integritet entiteta u aplikaciji

    • i referencijalni integritet i integritet entiteta u bazi podataka

    Correct Answer
    A. i referencijalni integritet i integritet entiteta u bazi podataka
    Explanation
    The correct answer is "i referencijalni integritet i integritet entiteta u bazi podataka". This answer states that according to Prema Codd, the rules of database integrity are defined in both the referential integrity and entity integrity in the database. This means that the integrity of the relationships between tables and the integrity of the individual entities within the tables are both important for maintaining data consistency and accuracy in the database.

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  • 33. 

    U operatore pogodne za izveštavanje spadaju

    • Selekcija, projekcija i dekartov proizvod

    • Unija, presek i spajanje

    • Selekcija, projekcija i spajanje

    • Unija, presek, razlika i dekartov proizvod

    Correct Answer
    A. Selekcija, projekcija i spajanje
    Explanation
    The correct answer is "selekcija, projekcija i spajanje". These are all operators commonly used in database query languages. "Selekcija" refers to the operation of selecting certain rows from a table based on specified conditions. "Projekcija" refers to the operation of selecting certain columns from a table. "Spajanje" refers to the operation of combining two or more tables based on a common attribute. These operators are fundamental in retrieving and manipulating data from a database.

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  • 34. 

    U kojoj je normalnoj formi relacija ako su sve vrednosti njenih atributa atomske

    • Boyce Codd-ovoj normalnoj formi

    • Prvoj normalnoj formi

    • Trecoj normalnoj formi

    • Ni u jednoj

    Correct Answer
    A. Prvoj normalnoj formi
    Explanation
    In the first normal form (1NF), all the values of the attributes in a relation are atomic, meaning they cannot be further divided into smaller components. This means that each attribute in a relation should contain only a single value and cannot have multiple values or be a composite attribute. Therefore, if all the values of the attributes in a relation are atomic, it is in the first normal form.

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  • 35. 

    Kojom klauzolom je moguce izdvojiti samo neke atribute

    • Select

    • Where

    • From

    • Group by

    Correct Answer
    A. Select
    Explanation
    The correct answer is "Select". In SQL, the SELECT statement is used to retrieve data from a database. It allows you to specify which columns or attributes you want to retrieve in the result set. The SELECT statement can be used to extract specific attributes or all attributes from a table, depending on the requirements of the query.

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  • 36. 

    Koja naredba pripada grupi naredbi za upravljacke funkcije

    • Grant

    • Alter Table

    • Delete

    • Select

    Correct Answer
    A. Grant
    Explanation
    The correct answer is "Grant." Grant is a command used in database management systems to give specific privileges or permissions to users or roles. It is a control function that allows administrators to define who can access and manipulate data within a database. The other options listed (Alter Table, Delete, and Select) are not control functions but rather data manipulation or data definition commands.

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  • 37. 

    Data je tabela radnik <idbr, posao, ime, prezime, brod>. Koji je upit od siedećih ispravan ?

    • SELECT brod, posao, count(*) FROM radnik GROUP BY brod, posao HAVING count(*)>1;

    • SELECT brod, count(*) FROM radnik GROUP BY posao HAVING count(*)>1;

    • SELECT posao, count(*) FROM radnik GROUP BY brod HAVING count(*)>1;

    • SELECT brod, count(*) FROM radnik GROUP BY brod, posao HAVING count(*)>1;

    Correct Answer
    A. SELECT brod, posao, count(*) FROM radnik GROUP BY brod, posao HAVING count(*)>1;
    Explanation
    The correct answer is the first option: "SELECT brod, posao, count(*) FROM radnik GROUP BY brod, posao HAVING count(*)>1;". This query selects the columns "brod" and "posao" from the table "radnik", and then groups the rows by the values in the "brod" and "posao" columns. It then counts the number of rows in each group using the count(*) function. Finally, it filters the groups to only include those with a count greater than 1 using the HAVING clause. This query will return the "brod" and "posao" values that appear more than once in the table.

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  • 38. 

    Ime relacije, vrednost primarnog ključa i ime atributa relacije jednoznačnoidentifikuju

    • Zapis

    • Skup zapisa

    • Atomarni podatak

    • Skup atomarnih podataka

    Correct Answer
    A. Atomarni podatak
    Explanation
    The given statement implies that the combination of the relation name, primary key value, and attribute name uniquely identifies an atomic data item. This means that each individual data item within a relation can be uniquely identified using these three pieces of information.

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  • 39. 

    U naredbe za definisanje podataka (Data Definition Staternents) spadaju

    • Create table, create view, begin transaction

    • Create table, drop view, commit work

    • Grant, revoke, rollback work

    • Create view, create index, create table

    Correct Answer
    A. Create view, create index, create table
    Explanation
    The correct answer is "create view, create index, create table". These are all examples of data definition statements in SQL. "Create view" is used to create a virtual table based on the result of a query. "Create index" is used to create an index on a table to improve query performance. "Create table" is used to create a new table in the database.

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  • 40. 
    Na slici je prikazana koj kardinalnost  - ProProfs

    Na slici je prikazana koj kardinalnost 

    • 1:M

    • M:M

    • 1:1

    • M:1

    Correct Answer
    A. M:M
    Explanation
    The correct answer is M:M, which represents a many-to-many cardinality relationship. This means that multiple entities from one table can be associated with multiple entities from another table. In this case, both tables have a many-to-many relationship with each other, indicating that multiple entities from the first table can be linked to multiple entities from the second table, and vice versa.

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  • 41. 

    Data je tabela GRADANIN<matbr, ime, prezime, matbr2>. Atribut matbr predstavlja maticni broj osobe, a matbr2maticni broj bracnog druga osobe koja je opisana u jednom zapisu. Izmedu n-torki tabele GRADANIN postoje:

    • Unarne veze1:N

    • Unarne veze 1:1

    • Binarne veze 1:1

    • Unarne veze M:N

    Correct Answer
    A. Unarne veze 1:1
    Explanation
    The correct answer is "unarne veze 1:1". This means that there is a one-to-one relationship between the tuples in the table GRADANIN. Each tuple represents a person and has a unique matbr (maticni broj) attribute. The matbr2 attribute represents the maticni broj of the spouse of that person, and it is also unique. Therefore, each person in the table is associated with one and only one spouse, and each spouse is associated with one and only one person.

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  • 42. 

    Integritet entiteta je:

    • Trojka (tip podataka,duzinapodataka, uslov)

    • Nijedan deo niti ceo primarni kljuc ne mogu biti NULL

    • Spoljni kljuc je podskup skupa primarnog kljuca

    • Specialno ogranicenje domena, tako da obelezje moze imati i nedefinisanu vrednost

    Correct Answer
    A. Nijedan deo niti ceo primarni kljuc ne mogu biti NULL
    Explanation
    Integritet entiteta refers to the integrity constraints that ensure the correctness and consistency of data within a database. The given answer states that neither a part nor the entire primary key can have a NULL value. This is a valid explanation as NULL values are not allowed in primary keys, as they are used to uniquely identify records in a table, and having NULL values would defeat this purpose.

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  • 43. 

    Pravilo referencijalnog integriteta glasi

    • Skup vrednosti spoljnog ključa relacije R1 mora biti nadskup skupa vrednosti primarnog ključa relacije R2, pri čemu relacije R1 i R2 ne moraju biti različite

    • Skup vrednosti spoljnog ključa relacije R1 mora biti podskup skupa vrednosti primarnog ključa relacije R2, pri čemu relacije R1 i R2 ne moraju biti različite

    • Skup vrednosti spoljnog ključa relacije R1 mora biti nadskup skupa vrednosti primarnog ključa relacije R2, pri čemu relacije R1 i R2 moraju biti različite

    • Skup vrednosti spoljnog ključa relacije R1 mora biti podskup skupa vređnosti primarnog ključa relacije R2, pri čemu relacije R1 i R2 moraju biti različite

    Correct Answer
    A. Skup vrednosti spoljnog ključa relacije R1 mora biti podskup skupa vrednosti primarnog ključa relacije R2, pri čemu relacije R1 i R2 ne moraju biti različite
    Explanation
    The correct answer states that the set of values of the foreign key in relation R1 must be a subset of the set of values of the primary key in relation R2, where relations R1 and R2 do not have to be different. This means that the values in the foreign key column of relation R1 must exist in the primary key column of relation R2, but it is not necessary for R1 and R2 to be different relations. In other words, the foreign key in R1 references the primary key in R2, ensuring referential integrity between the two relations.

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  • 44. 

    Ako upiti nad tabelom radnik<idbr#,ime,posao>SELECT DISTINCT ime,posao From radnik;iSELECT ALL ime,posao From radnikvracaju jednak broj zapisa, onda vazi sledece

    • U tabeli RADNIK ne postoje radnici sa istim poslom

    • U tabeli RADNIK ne postoji vise radnika koji imaju isto ime i isti posao

    • U tabeli RADNIK ne moze postojati vise radnika koji imaju isto ime

    • U tabeli RADNIK postoji vise radnika koji imaju isto ime i posao

    Correct Answer
    A. U tabeli RADNIK ne postoji vise radnika koji imaju isto ime i isti posao
    Explanation
    The correct answer implies that in the table RADNIK, there are no multiple workers with the same name and the same job. This means that each worker in the table has a unique combination of name and job.

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  • 45. 

    Skup svih vrednosti elementarnih obelezja koja se odnose na jedan objekat predstavlja

    • Intenziju

    • Zapis

    • Polje

    • Atribut

    Correct Answer
    A. Zapis
    Explanation
    The correct answer is "Zapis". In Serbian language, "zapis" means "record" or "entry". Therefore, the skup svih vrednosti elementarnih obelezja, which translates to "set of all values of elementary features", can be understood as a record or entry that represents the values associated with an object.

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  • 46. 

    Realizacija informacionog sistema pocinje:

    • Realizacijom komunikacionog modela prema korisnicima

    • Fizickom realizacijom usvojenog modela baze podataka

    • Bilo kojim postupkom

    • Realizacijom aplikacionog dela baze podataka

    Correct Answer
    A. Fizickom realizacijom usvojenog modela baze podataka
    Explanation
    The correct answer is the physical implementation of the adopted database model. This means that after designing the database model, the next step is to physically create the database structure and populate it with data. This involves creating tables, defining relationships, and setting up constraints. The physical implementation ensures that the database model is translated into an actual functioning database that can be accessed and manipulated.

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  • 47. 

    Relacija se nalazi u trećoj normalnoj formi

    • Ako neključni atributi u tabeli nisu ni funkcionalno ni tranzitivno zavisni od ključnih atributa

    • Ako su svi neključni atributi u tabeli i funkcionalno i tranzitivno zavisni od ključnih atributa

    • Ako svi neključni atributi u tabeli nisu međusoono funkcionalno zavisni

    • Ako su svi neključni atributi u tabeii međusobno tranzitivno zavisni

    Correct Answer
    A. Ako neključni atributi u tabeli nisu ni funkcionalno ni tranzitivno zavisni od ključnih atributa
    Explanation
    The given answer states that if the non-key attributes in the table are neither functionally nor transitively dependent on the key attributes, then the relation is in the third normal form. This means that all non-key attributes are determined solely by the key attributes and there are no dependencies among the non-key attributes themselves.

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  • 48. 

    Minimalna kardinalnost odreduje

    • Neodreden broj instanci koji moraju da ucestvuju u vezi

    • Maksimalan broj instanci entiteta kojimoraju da ucestvuju u vezi

    • Minimalan broj instanci entiteta koji mogu a ne moraju da ucestvuju u vezi

    • Minimalan broj instanci entiteta koji morajuda ucestvuju u vezi

    Correct Answer
    A. Minimalan broj instanci entiteta koji mogu a ne moraju da ucestvuju u vezi
    Explanation
    The correct answer is "minimalan broj instanci entiteta koji mogu a ne moraju da ucestvuju u vezi". This means that the minimal cardinality determines the minimum number of instances of an entity that can optionally participate in a relationship. In other words, it indicates the minimum number of instances that may or may not be involved in the relationship.

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  • 49. 

    U operatore pogodne za azuriranje spadaju

    • Unije,presek i razlika

    • Selekcija, projekcija i dekartov proizvod

    • Unija, presek i spajanje

    • Selekcija, projekcija i spajanje

    Correct Answer
    A. Unije,presek i razlika
    Explanation
    The correct answer is "unije, presek i razlika" which translates to "union, intersection, and difference" in English. These are all operators used in set theory and database operations. The union operator combines two sets and returns a set containing all the elements from both sets. The intersection operator returns a set containing only the elements that are common to both sets. The difference operator returns a set containing only the elements that are in the first set but not in the second set. Therefore, all three operators mentioned in the answer are suitable for updating sets.

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Quiz Review Timeline (Updated): Jul 22, 2024 +

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

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  • Jul 22, 2024
    Quiz Edited by
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  • Dec 23, 2014
    Quiz Created by
    Jozef.1994
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