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DBI202 Exam Practice Questions and Answers Updated 2024
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DBI202 Exam Practice Questions and Answers Updated 2024 Choose a right answer. A. A SOL environment is the framework under which data may exist and SQL operations on data may be executed [B] All of the others [C] Within a SQL environment are two special kinds of processes: SQL clients and SQL...

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  • October 16, 2024
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EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024




DBI202 Exam Practice Questions and
Answers Updated 2024

Choose a right answer.


A. A SOL environment is the framework under which data may exist and SQL operations on data


may be executed


[B] All of the others


[C] Within a SQL environment are two special kinds of processes: SQL clients and SQL servers.


[D] A SQL environment is a DBMS running at some installation. - Answer✔✔-B


Schema-altering commands are known as......commands.


[A]Data Manipulation Language


[B]Data Controlling Language


[C]Data Definition Language


[D]None of the others - Answer✔✔-C


Referential integrity Constraints control relationships between _.


[A]operations of an object


[B]tables in a database

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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


[C]attributes in a table


[D]database instances - Answer✔✔-B


Choose the right statement below to declare zero or one occurrence of an Element in DTD.


[A]<"ELEMENT element-name (childname?)>


[B]<IELEMENT element-name (child-name+)>


[C]<'ELEMENT element-name (child-name*)>


[D]<IELEMENT element-name (child-name)> - Answer✔✔-A


Given the relation Employee(SSN. FNAME. LNAME. SALARY). Select the right query below


to find the employee(s) who has the lowest salary in the company


[A]SELECT LNAME. FNAME. SALARY FROM Employee WHERE SALARY IN (SELECT


MIN(SALARY) FROM Employee)


[B]SELECT LNAME. FNAME. SALARY FROM Employee WHERE SALARY >= ALL


(SELECT SALARY FROM Employee)


[C]SELECT LNAME. FNAME. SALARY FROM Employee WHERE SALARY < MAX


(SELECT SALARY FROM Employee)


[D]None of the others - Answer✔✔-A


Given a relation R(A.B.C.D). Which of the followings is trivial?



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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


[A]A->BCD


[B]A->->BCD


[C]A->AB


[D]A->->AB - Answer✔✔-B


Which of the following is NOT a standard aggregation operator?


[A]SUM


[B]AVG


[C]GROUP


[D]COUNT - Answer✔✔-C


Select the well-formed XML


[A]All of the others


[B]<? xml version = "1.0" ?>


<MovieData>


<Movie tiHe="StarWar*><Year>1997</Yearx/MovJe>


</MovieData>


[C]<? xml version - "1 0' ?>


<MovieData>



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, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


<Movie Me-'StarWaf*><Year>1997</Year></Movie>


</Movies>


[D]<? xml version = 1 0 7>


<MovieData>


<Movie trtle-"StarWar"><Year>1997</Movie></Year>


</MovieData> - Answer✔✔-B


Which of the followings is true?


[A]The Entity Relationship (ER) model represents the structure of data graphically


[B]The ER model is a low level database design


IC]The ER model represents the operation on data


[D]All of the others - Answer✔✔-A


In the three-tier architecture, the database tier's function is to


[A]All of the others.


[B]Execute the business logic of the organization operating the database.


[C]Manage the interactions with the user.


[D]Execute queries that are requested from the application tier. - Answer✔✔-D


Choose a right answer



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