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Consider the relational database schema REGISTRATION (License_id, Car_id, Registered, primary key(License_id, Car_id)), CAR(Car_id primary key, Model, Year, Color). An expression in relational algebra to find out the license id of license holder and the model of the car owned by them can be
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If I ... harder for the test I would have got a better grade.:
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Consider a relation schema R(A, B, C, D) and the set of functional dependencies F = {A determines B, B determines C, C determines D}. A minimal cover of F is
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Which of the following statements is FALSE?
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El estilo de liderazgo más adecuado depende de que la situación global sea favorable, desfavorable o se halle en una etapa intermedia con respecto al líder, y las variables contingentes son: relaciones líder-miembro, estructura de la tarea y poder del puesto del líder. Este modelo contingente fue propuesto por:
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Consider the relation schema (Hotel_no, Guest_no, Date_from, Date_to, Room_no, primary key(Hotel_no, Guest_no, Date_from). An expression in relational algebra to find out the guest number (guest_no) who stayed in hotel number (hotel_no) 72 but never stayed in hotel number 74 can be
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Modelo de comportamiento organizacional que depende del poder. En este ambiente la orientación de la administración es hacia la autoridad, y la de los empleados es hacia la obediencia. Las necesidades de los empleados que se satisfacen son las de subsistencia:
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That horse could have won the race if it ... his leg.:
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Suppose that the relation R(A, B, C, D, E) has the following functional dependencies: A determines B, B determines C, BC determines A, A determines D, E determines A, D determines E. Which of the following is not a key of R?
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A routing table consists of directly connected networks and routes learned statically or dynamically. Which routing table entry does not have a next hop address associated with a destination network?
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