đáP án full quiz test môn đồ án cơ sở của fsoft

Question 1 of 20 5.0/ 5.0 Points

What is data integrity?

A.It is the data contained in database that is shared.

B.It is the data contained in database that is secured.

C.It is the data contained in database that is non redundant.

D.It is the data contained in database that is accurate and consistent.


A set of possible data values is called:

A.Attribute.

B.Degree.

C.Domain.

D.Tuple.


The entity-relationship diagrams A and B shows the relationships between three entities in a school:

teacher, class, and classroom. Which of the following is an appropriate interpretation concerning the diagrams? Here, " 1 1 " shows a one-to-one relationship while " 1 * " shows a one-to-many relationship.

A.In A, one class is always assigned to the same classroom. In B, one class may be assigned to one or more classrooms.

B.In A, one class is always supervised by one teacher. In B, one class may

be supervised by one or more teachers.

C.In A, when a teacher or a classroom is decided, a single class will be

decided. In B, if a teacher and a classroom are decided, a single class will be decided.

D.In A, a teacher is responsible for one class only. In B, a teacher may

be responsible for one or more classes.


An advantage of the database management approach is:

A.Data is dependent on programs.

B.Data redundancy increases.

C.Data is integrated and can be accessed by multiple programs.

D. None of the above.


It is better to use files than a DBMS when there are:

A.Stringent real-time requirements.

B.Multiple users wish to access the data.

C.Complex relationships among data.

D. All of the above.


NULL is:

A.The same as 0 for integer

B.The same as blank for character

C.The same as 0 for integer and blank for character

D.Not a value


If both the functional dependencies : X→Y and Y→X hold for two attributes X and Y then the relationship between X and Y is

A.1:1

B.1:M

C.M:N

D.M:1


Which of the following is the appropriate characteristic of a database?

A.Because a database is created to suit the format of the data, it cannot respond flexibly to data format changes.

B.It is difficult to share data between operations due to an exclusive control function.

C.The procedure for making backups is complicated.

D.It can be accessed by multiple users at the same time due to an exclusive control function.


In case of entity integrity, the primary key may be:

A.Not Null

B.Both Null & not Null.

C.Null


Which of the following are the properties of entities?

A.Groups

B.Switchboards

C.Attributes

D.Table


You are tasked with creating a database to manage where computers are installed at a company that has offices in several buildings. You create an “asset” table, a “room” table, and a “building” table, and link each of them together. When new data is entered, the data in the referenced table must already exist.

Which of the following is the appropriate order of in-put? Here, the underlined items in each table are either primary or foreign keys.

A.“Building” table →“Room” table →“Asset” table

B.“Room” table →“Building” table →“Asset” table

C.“Asset” table →“Building” table →“Room” table

D.“Room” table →“Asset” table →“Building” table


You are building a new database for a company with 10 departments. Each department contains multiple employees. In addition, each employee might work for several departments. How should you logically model the relationship between the department entity and the employee entity?

User(User_ID, User_Name, Address)

Reservation(User_ID, Book_Title_ID, Reservation_Date)

Book_Title(Book_Title_ID, Category_Code, Book_Title, Author)

Stocked_Book(Stocked_Book_ID, Book_Title_ID, Purchase_Date, Cumulative_Lending_Count)

A.Create a new entry, create a one-to-many relationship from the new entry to the

employee entry, and then create a one-to-many relationship from the entry to the department entry.

B.Create a mandatory one-to-many relationship between department and employee.

C.Create an optional one-to-many relationship between department and employee.

D.Create a new entry, create a one-to-many relationship from the employee to the new

entry, and create a one-to-many relationship from the department entry to the new entry.


The file organization that provides very fast access to any arbitrary record of a file is:

A.Ordered file.

B. B-tree.

C.Unordered file.

D.Hashed file.


A relation is considered a:

A.three-dimensional table.

B.two-dimensional table.

C.Column.

D. one-dimensional table.


In the ERD diagram, the one-to-many relationship, "a company has multiple employees," is expressed as

follows:

Which of the following statements correctly explains the above diagram?

A.There are multiple companies, and each company has a shareholder.

B.There are multiple companies, and each company has multiple shareholders.

C.One company has one shareholder.

D.One company has multiple shareholders.


If the condition given below applies, which of the following is appropriate as an E-R diagram showing the

departments employees belong to?

A.

B.

C.

D.


The values of the attribute describes a particular_____________

A.Entity set

B.Entity instance

C.Organization

D.File


In the relational modes, cardinality is termed as:

A.Number of tables.

B. Number of tuples.

C.Number of attributes.

D.Number of constraints.


What is a relationship called when it is maintained between two entities?

A.Ternary

B.Binary

C.Quaternary

D.Unary


Which of the following appropriately describes a domain (defined area), a term used for relational databases?

A. It is a specification for copying the real world to a database.

B.It is a relationship derived by applying the relational operations to the basic relationship.

C.It is the general term for data insertion, updating, deletion, and search in a database.

D.It is a set of values that attributes can hold.


The database environment has all of the following components except:

A.Users.

B.Database.

C.Separate files.

D. Database administrator.





C.Column.




A.It is a relationship derived by applying the

relational operations to the basic relationship.

B. It is a specification for copying the real world to a

database.

C.It is a set of values that attributes can hold.

D.It is the general term for data insertion, updating, deletion, and search in a database.


DBMS helps achieve:

A.Data independence.

B.Centralized control of data.

C.Neither (A) nor (B).

D.Both (A) and (B).


An entity set that does not have sufficient attributes to form a

primary key is a:

A.Weak entity set.

B.Primary entity set.

C.Strong entity set.

D.Simple entity set.


The method in which records are physically stored in a specified

order according to a key field in each record

A.Hash.

B.Direct.

C.Sequential.

D.All of the above.



A.Degree.

B.Tuple.

C.Domain.

D.Attribute.


Which of the following appropriately describes a schema in a relational database management system?

A.It is the general term for database operations such

as data insertion, updating, deletion, search, etc.

B.It is the general term for various conditions and

constraints that are used to maintain the database in absolutely perfect condition.

C.It is a set of data definitions such as the data

properties, format, relationship with other data, etc.

D.It is not an actual table but a virtual table from the

perspective of the user.


The entity-relationship diagrams A and B shows the

relationships between three entities in a school: teacher, class, and classroom. Which of the following is an appropriate interpretation concerning the diagrams? Here, " 1 1 " shows a

one-to-one relationship while " 1 * " shows a one-to-many relationship.

A.In A, when a teacher or a classroom is decided, a

single class will be decided. In B, if a teacher and a classroom are decided, a

single class will be decided.

B.In A, one class is always assigned to the same classroom. In B, one class may be assigned to one or more classrooms.

C.In A, one class is always supervised by one teacher. In B, one class may


D.In A, a teacher is responsible for one class only. In

B, a teacher may be responsible for one or more classes.


In an E-R diagram double lines indicate

A.Total participation.

B.Multiple participation.

C.Cardinality N.

D.None of the above.


In a relation:

A.Ordering of rows is immaterial.

B.No two rows are identical.

C.(A) and (B) both are true.

D.None of these.


Which of the following is not a restriction for a table to be a

relation?

A.The cells of the table must contain a single value.

B.No two rows in a table may be identical.

C.The columns must be ordered.

D.All of the entries in any column must be of the

same kind.


The conceptual model is:

A.Dependent on software.

B.Dependent on hardware.

C. Independent of both hardware and software.

D.Dependent on both hardware and software.



A.Organization

B.Entity set

C.File

D.Entity instance


The file organization that provides very fast access to any

arbitrary record of a file is:

A. B-tree.

B.Hashed file.

C.Unordered file.

D.Ordered file.



A.Both Null & not Null.

B.Not Null

C.Null


The DBMS acts as an interface between what two components of an enterprise-class database system?

A. Database application and the database

B.Database application and SQL

C. Data and the database

D.The user and the database application


The RDBMS terminology for a row is:

A.Attribute.

B.Relation.

C.Tuple.

D.Degree.


A relational database developer refers to a record as:

A.A criteria.

B.A tuple.

C.An attribute.

D.A relation.


Which of the following is another name for weak entity?

A.Child

B.Owner

C.Dominant

D.All of the above

HAUI_010_NSD_Quiz1_DB Designer

Ret ur n t o Assessment List

Part 1 of 1 - 80.0/ 100.0 Points


Conceptual design

A.Is a documentation technique.

B.Is designing the relational model.

C. Needs data volume and processing frequencies to determine the size of the database.

D.Involves modelling independent of the DBMS.


In an E-R diagram attributes are represented by:

A.Rectangle.

B.Ellipse.

C.Square.

D.Triangle.



A.Tuple.

https://gst.fsoft.com.vn/portal/tool/9354ff26-9491-4392-9e3a-1b7b3b65a788/jsf/select/selectIndex

B.Domain.

C.Attribute.

D.Degree.



A.Relation.

B.Tuple.

C.Degree.

D.Attribute.


The DBMS acts as an interface between what two components of an enterprise-class database

system?

A.Database application and SQL

B. Database application and the database

C. Data and the database



You are building a new database for a company with 10 departments. Each department contains

multiple employees. In addition, each employee might work for several departments. How should you logically model the relationship between the department entity and the employee entity?





A.Create a new entry, create a one-to-many relationship from the new entry to the employee entry, and then create a one-to-many relationship from the entry to the department

entry.

B.Create an optional one-to-many relationship between department and employee.

C.Create a new entry, create a one-to-many relationship from the employee to the new entry, and create a one-to-many relationship from the department entry to the new entry.

D.Create a mandatory one-to-many relationship between department and employee.


A DBMS query language is designed to:

A.Support end users who use English- like commands.

B.Support in the development of complex applications software.

C.Specify the structure of a database.



Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the maximum size of join is:

A.mn

B.m+n

C.2(m+n)

D.(m+n)/2



A.It is a set of data definitions such as the data properties, format, relationship with other data, etc.

B.It is not an actual table but a virtual table from the perspective of the user.

C.It is the general term for various conditions and constraints that are used to maintain the database in absolutely perfect condition.

D.It is the general term for database operations such as data insertion, updating, deletion,

search, etc.


The following data model has been created as a part of a library reservation system. Which is the correct description for it? In this question, 1 * means one-to-many cardinality and the

underlined attributes in the table definition are primary keys

User(User_ID, User_Name, Address) Reservation(User_ID, Book_Title_ID, Reservation_Date)

Book_Title(Book_Title_ID, Category_Code, Book_Title, Author) Stocked_Book(Stocked_Book_ID, Book_Title_ID, Purchase_Date,

Cumulative_Lending_Count)

A.The Book_Title entity is an abstract entity that has no physical substance

B.The Stocked_Book to be lent can be decided at the time of reservation

C.The cardinality between the Book_Title entity and Stocked_Book entity is opposite

D. It is redundant to separate the Book_Title entity and Stocked_Booked entity


In a relation:




D.None of these.


Which of the following is expressed by an E-R diagram?

A.Relation between entities

B.Relation between process and relationship

C.Relation between processes

D.Relation between entity and process


Which of the following is described graphically using an E-R diagram?

A.Data source and destination

B.Hierarchical data structure

C.Data flows between processes

D.Entities and relationships between entities



A. Number of tuples.

B.Number of attributes.

C.Number of constraints.

D.Number of tables.



A.Organization

B.Entity set

C.Entity instance

D.File


If the condition given below applies, which of the following is appropriate as an E-R diagram showing the departments employees belong to?

A.

B.

C.

D.


Which of the following is not a restriction for a table to be a relation?

A.All of the entries in any column must be of the same kind.

B.No two rows in a table may be identical.

C.The columns must be ordered.

D.The cells of the table must contain a single value.


An entity set that does not have sufficient attributes to form a primary key is a:

A.Simple entity set.

B.Primary entity set.

C.Weak entity set.

D.Strong entity set.


In the ERD diagram, the one-to-many relationship, "a company has multiple employees," is expressed as follows:


A.One company has multiple shareholders.


C.There are multiple companies, and each company has a shareholder.

D.One company has one shareholder.


In E-R diagram generalization is represented by

A.Dashed ellipse

B.Ellipse

C.Rectangle

D.Triangle



A.A criteria.

B.An attribute.

C.A relation.

D.A tuple.





C.Cardinality N.



NULL is:




D.Not a value


If both the functional dependencies : X→Y and Y→X hold for two attributes X and Y then the

relationship between X and Y is

A.M:1

B.1:1

C.M:N

D.1:M



system?


B. Data and the database

C.Database application and SQL




A.Relation between entities

B.Relation between entity and process


D.Relation between process and relationship


DBMS helps achieve:




D.Both (A) and (B).



A.Separate files.

B.Database.

C.Users.

D. Database administrator.


The following data model has been created as a part of a library reservation system. Which is

the correct description for it? In this question, 1 * means one-to-many cardinality and the underlined attributes in the table definition are primary keys

User(User_ID, User_Name, Address) Reservation(User_ID, Book_Title_ID, Reservation_Date) Book_Title(Book_Title_ID, Category_Code, Book_Title, Author)


A.The cardinality between the Book_Title entity and Stocked_Book entity is opposite

B. It is redundant to separate the Book_Title entity and Stocked_Booked entity

C.The Book_Title entity is an abstract entity that has no physical substance

D.The Stocked_Book to be lent can be decided at the time of reservation



A.Attributes

B.Switchboards

C.Table

D.Groups





C. one-dimensional table.

D.Column.


Conceptual design

A.Is designing the relational model.

B.Is a documentation technique.

C. Needs data volume and processing frequencies to determine the size of the database.



When the data model is represented to conform to the notational convention shown below, which of the following statements appropriately interprets the designated E-R diagram?

A.It doe not occur that a single order placement is given for multiple types of products.

B.A single product is supplied by a single supplier.

C.It does not occur that a single order placement is given to multiple suppliers.

D.Order statements and delivery statements have a one-to-one correspondence.


You are building a new database for a company with 10 departments. Each department contains

multiple employees. In addition, each employee might work for several departments. How should you logically model the relationship between the department entity and the employee entity?





A.Create a mandatory one-to-many relationship between department and employee.

B.Create a new entry, create a one-to-many relationship from the employee to the new entry, and create a one-to-many relationship from the department entry to the new entry.


D.Create a new entry, create a one-to-many relationship from the new entry to the



You are tasked with creating a database to manage where computers are installed at a company that has offices in several buildings. You create an “asset” table, a “room” table, and a

“building” table, and link each of them together. When new data is entered, the data in the referenced table must already exist. Which of the following is the appropriate order of in-put? Here, the underlined items in each table are either primary or foreign keys.

A.“Room” table →“Asset” table →“Building” table



D.“Building” table →“Room” table →“Asset” table


A DBMS query language is designed to:

A.Support end users who use English- like commands.

B.Support in the development of complex applications software.

C.Specify the structure of a database.



Which of the following appropriately describes a schema in a relational database management

system?

A.It is the general term for various conditions and constraints that are used to maintain the database in absolutely perfect condition.

B.It is a set of data definitions such as the data properties, format, relationship with other data, etc.

C.It is not an actual table but a virtual table from the perspective of the user.


search, etc.


Which of the following is another name for weak entity?

A.Child

B.Owner

C.Dominant

D.All of the above


Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the

maximum size of join is:

A.m+n

B.2(m+n)

C.(m+n)/2

D.mn


E-R model uses this symbol to represent weak entity set?

A.Dotted rectangle.

B.Diamond.

C.Doubly outlined rectangle.

D.None of these.



Part 1 of 1 - 50.0/ 100.0 Points




A.It is a set of data definitions such as the data properties, format, relationship with other data, etc.


C.It is the general term for various conditions and constraints that are used to maintain

the database in absolutely perfect condition.


search, etc.



A. Independent of both hardware and software.

B.Dependent on software.

C.Dependent on both hardware and software.

D.Dependent on hardware.


In E-R Diagram total participation is represented by:

A.Double lines

B.Single line

C.Dashed lines

D.Triangle



A. one-dimensional table.

B.Column.

C.two-dimensional table.

D.three-dimensional table.



A.Binary

B.Quaternary

C.Ternary

D.Unary



A.File

B.Entity set

C.Entity instance

D.Organization



A.Ordered file.

B. B-tree.

C.Hashed file.

D.Unordered file.


In an E-R diagram attributes are represented by:

A.Square.

B.Rectangle.

C.Triangle.

D.Ellipse.


Which of the following is an accurate statement in regard to an E-R diagram?

A.It clarifies the operational relations between individual processes and data. As a result,

the relations between introduced entities express the individual operational processes.

B.It creates an abstraction of information handled in operations, so as to express entities and the relations between them.

C. It is created as a pretext to implementing a relational database

D.It expresses the entire process from data creating to destruction.



A.Hierarchical data structure

B.Data flows between processes

C.Data source and destination



NULL is:




D.Not a value


Conceptual design

A.Is designing the relational model.

B. Needs data volume and processing frequencies to determine the size of the database.

C.Involves modelling independent of the DBMS.

D.Is a documentation technique.



A.The procedure for making backups is complicated.


C.It can be accessed by multiple users at the same time due to an exclusive control function.

D.Because a database is created to suit the format of the data, it cannot respond flexibly to data format changes.



A.Number of attributes.

B.Number of tables.

C. Number of tuples.



The entity-relationship diagrams A and B shows the relationships between three entities in a school: teacher, class, and classroom. Which of the following is an appropriate interpretation concerning the diagrams? Here, " 1 1 " shows a one-to-one relationship while " 1 * " shows a

one-to-many relationship.

A.In A, when a teacher or a classroom is decided, a single class will be


B.In A, one class is always assigned to the same classroom. In B, one

class may be assigned to one or more classrooms.

C.In A, a teacher is responsible for one class only. In B, a teacher may


D.In A, one class is always supervised by one teacher. In B, one class may




A.It is the data contained in database that is secured.

B.It is the data contained in database that is accurate and consistent.

C.It is the data contained in database that is shared.

D.It is the data contained in database that is non redundant.



A.Groups

B.Switchboards

C.Attributes

D.Table


DBMS helps achieve:




D.Both (A) and (B).








An entity set that does not have sufficient attributes to form a primary key is a:

A.Primary entity set.

B.Strong entity set.

C.Weak entity set.

D.Simple entity set.



Part 1 of 1 - 40.0/ 100.0 Points


In E-R Diagram relationship type is represented by:

A.Rectangle

B.Ellipse

C.Diamond

D.Dashed ellipse


In a relation:




D.None of these.


Which of the following appropriately describes a schema in a relational database management

system?

A.It is the general term for various conditions and constraints that are used to maintain

the database in absolutely perfect condition.



C.It is the general term for database operations such as data insertion, updating, deletion, search, etc.

D.It is a set of data definitions such as the data properties, format, relationship with other data, etc.


The method in which records are physically stored in a specified order according to a key field in each record

A.Hash.

B.Direct.

C.Sequential.

D.All of the above.



A.An attribute.

B.A criteria.

C.A relation.

D.A tuple.


The following data model has been created as a part of a library reservation system. Which is the correct description for it? In this question, 1 * means one-to-many cardinality and the underlined attributes in the table definition are primary keys

User(User_ID, User_Name, Address) Reservation(User_ID, Book_Title_ID, Reservation_Date)

Book_Title(Book_Title_ID, Category_Code, Book_Title, Author) Stocked_Book(Stocked_Book_ID, Book_Title_ID, Purchase_Date, Cumulative_Lending_Count)

A.The Book_Title entity is an abstract entity that has no physical substance

B. It is redundant to separate the Book_Title entity and Stocked_Booked entity

C.The cardinality between the Book_Title entity and Stocked_Book entity is opposite




A.It is a set of values that attributes can hold.

B. It is a specification for copying the real world to a database.


D.It is a relationship derived by applying the relational operations to the basic relationship.


An instance of relational schema R (A, B, C) has distinct values of A including NULL values. Which one of the following is true?

A.A is a candidate key.

B.A is not a candidate key

C.A is a primary Key

D.Both (A) and (C)



A.Degree.

B.Domain.

C.Attribute.

D.Tuple.


A table can have only one

A.Primary key

B.Secondary key

C.Unique key

D.Alternate key


Which of the following statements correctly describes data normalization?

A.It reduces the amount of required memory space by simplifying database structures.

B.It facilitates application program creation

C. It increases the efficiency of database searches

D.It prevent data multiplicity, thereby making maintenance and management easier


If the condition given below applies, which of the following is appropriate as an E-R diagram

showing the departments employees belong to?

A.

B.

C.

D.


DBMS helps achieve:




D.Both (A) and (B).


Which option is not TRUE?

A.Use varchar when your strings do not have a fixed length.

B.Use char when your strings are always going to be the same length.

C.(A) and (B) is true.

D.Neither (A) nor (B)


In an E-R diagram an entity set is represent by a:

A.Diamond box.

B.Ellipse.

C.Rectangle.

D.Circle.


You are tasked with creating a database to manage where computers are installed at a company

that has offices in several buildings. You create an “asset” table, a “room” table, and a “building” table, and link each of them together. When new data is entered, the data in the referenced table must already exist. Which of the following is the appropriate order of in-put?

Here, the underlined items in each table are either primary or foreign keys.


B.“Room” table →“Asset” table →“Building” table

C.“Room” table →“Building” table →“Asset” table

D.“Asset” table →“Building” table →“Room” table



system?


B. Data and the database

C.The user and the database application

D.Database application and SQL



A.Dotted rectangle.

B.Diamond.


D.None of these.



A. Independent of both hardware and software.

B.Dependent on hardware.

C.Dependent on software.

D.Dependent on both hardware and software.



A.Hierarchical data structure

B.Data source and destination

C.Data flows between processes




A.It is the data contained in database that is shared.



D.It is the data contained in database that is accurate and consistent.



A.Attribute.

B.Degree.

C.Domain.

D.Tuple.


The entity-relationship diagrams A and B shows the relationships between three entities in a school:

teacher, class, and classroom. Which of the following is an appropriate interpretation concerning the diagrams? Here, " 1 1 " shows a one-to-one relationship while " 1 * " shows a one-to-many relationship.

A.In A, one class is always assigned to the same classroom. In B, one class may be assigned to one or more classrooms.

B.In A, one class is always supervised by one teacher. In B, one class may


C.In A, when a teacher or a classroom is decided, a single class will be


D.In A, a teacher is responsible for one class only. In B, a teacher may















NULL is:




D.Not a value


If both the functional dependencies : X→Y and Y→X hold for two attributes X and Y then the relationship between X and Y is

A.1:1

B.1:M

C.M:N

D.M:1









A.Not Null

B.Both Null & not Null.

C.Null



A.Groups

B.Switchboards

C.Attributes

D.Table


You are tasked with creating a database to manage where computers are installed at a company that has offices in several buildings. You create an “asset” table, a “room” table, and a “building” table, and link each of them together. When new data is entered, the data in the referenced table must already exist.

Which of the following is the appropriate order of in-put? Here, the underlined items in each table are either primary or foreign keys.




D.“Room” table →“Asset” table →“Building” table


You are building a new database for a company with 10 departments. Each department contains multiple employees. In addition, each employee might work for several departments. How should you logically model the relationship between the department entity and the employee entity?





A.Create a new entry, create a one-to-many relationship from the new entry to the


B.Create a mandatory one-to-many relationship between department and employee.


D.Create a new entry, create a one-to-many relationship from the employee to the new

entry, and create a one-to-many relationship from the department entry to the new entry.



A.Ordered file.

B. B-tree.

C.Unordered file.

D.Hashed file.





C.Column.




follows:


A.There are multiple companies, and each company has a shareholder.


C.One company has one shareholder.

D.One company has multiple shareholders.


If the condition given below applies, which of the following is appropriate as an E-R diagram showing the

departments employees belong to?

A.

B.

C.

D.



A.Entity set

B.Entity instance

C.Organization

D.File



A.Number of tables.

B. Number of tuples.

C.Number of attributes.




A.Ternary

B.Binary

C.Quaternary

D.Unary



A. It is a specification for copying the real world to a database.





In a relation:




D.None of these.


An instance of relational schema R (A, B, C) has distinct values of A including NULL values. Which one of the following is true?

A.A is a candidate key.

B.A is not a candidate key

C.A is a primary Key

D.Both (A) and (C)


DBMS helps achieve:




D.Both (A) and (B).















A.Ternary

B.Quaternary

C.Unary

D.Binary



A.Dotted rectangle.

B.Diamond.


D.None of these.



A.It is the data contained in database that is accurate and consistent.



D.It is the data contained in database that is shared.


The following data model has been created as a part of a library reservation system. Which is the correct

description for it? In this question, 1 * means one-to-many cardinality and the underlined attributes in the table definition are primary keys

User(User_ID, User_Name, Address) Reservation(User_ID, Book_Title_ID, Reservation_Date) Book_Title(Book_Title_ID, Category_Code, Book_Title, Author) Stocked_Book(Stocked_Book_ID, Book_Title_ID, Purchase_Date, Cumulative_Lending_Count)

A. It is redundant to separate the Book_Title entity and Stocked_Booked entity

B.The cardinality between the Book_Title entity and Stocked_Book entity is opposite

C.The Book_Title entity is an abstract entity that has no physical substance




A.Dependent on hardware.

B. Independent of both hardware and software.

C.Dependent on both hardware and software.

D.Dependent on software.



A.Relation between entity and process

B.Relation between entities


D.Relation between process and relationship


Which of the following is an accurate statement in regard to an E-R diagram?

A.It clarifies the operational relations between individual processes and data. As a result,

the relations between introduced entities express the individual operational processes.

B. It is created as a pretext to implementing a relational database

C.It expresses the entire process from data creating to destruction.

D.It creates an abstraction of information handled in operations, so as to express entities

and the relations between them.









A. Number of tuples.

B.Number of tables.

C.Number of constraints.

D.Number of attributes.





C. one-dimensional table.

D.Column.



A. Database administrator.

B.Users.

C.Database.

D.Separate files.



A.Ellipse

B.Dashed ellipse

C.Triangle

D.Rectangle


Conceptual design

A. Needs data volume and processing frequencies to determine the size of the database.

B.Is a documentation technique.

C.Is designing the relational model.



Which of the following appropriately describes a domain (defined area), a term used for relational

databases?

A.It is the general term for data insertion, updating, deletion, and search in a database.


C. It is a specification for copying the real world to a database.




follows:


A.One company has multiple shareholders.


C.There are multiple companies, and each company has a shareholder.

D.One company has one shareholder.



Part 1 of 1 - 90.0/ 100.0 Points


You are tasked with creating a database to manage where computers are installed at a company that has offices in several buildings. You create an “asset” table, a “room” table, and a “building” table, and link each of them together. When new data is entered, the data in the

referenced table must already exist. Which of the following is the appropriate order of in-put? Here, the underlined items in each table are either primary or foreign keys.



C.“Room” table →“Asset” table →“Building” table

D.“Asset” table →“Building” table →“Room” table




A.Relation between process and relationship

B.Relation between processes

C.Relation between entities

D.Relation between entity and process


Which of the following appropriately describes a domain (defined area), a term used for

relational databases?

A.It is a relationship derived by applying the relational operations to the basic relationship.

B.It is a set of values that attributes can hold.

C. It is a specification for copying the real world to a database.

D.It is the general term for data insertion, updating, deletion, and search in a database.



A.Hashed file.

B. B-tree.

C.Unordered file.

D.Ordered file.





C.Cardinality N.



Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the maximum size of join is:

A.2(m+n)

B.m+n

C.mn

D.(m+n)/2


In E-R Diagram total participation is represented by:

A.Triangle

B.Single line

C.Double lines

D.Dashed lines



A.Number of tables.

B.Number of attributes.

C. Number of tuples.




A.Rectangle

B.Ellipse

C.Triangle

D.Dashed ellipse


A table can have only one

A.Alternate key

B.Primary key

C.Secondary key

D.Unique key



A.Attribute.

B.Tuple.

C.Domain.

D.Degree.



A.Because a database is created to suit the format of the data, it cannot respond flexibly

to data format changes.


C.It can be accessed by multiple users at the same time due to an exclusive control function.

D.The procedure for making backups is complicated.


In a relation:




D.None of these.




B. one-dimensional table.

C.Column.

D.two-dimensional table.



A.A tuple.

B.A relation.

C.An attribute.

D.A criteria.


NULL is:




D.Not a value



A.Both Null & not Null.

B.Not Null

C.Null



A.Table

B.Attributes

C.Switchboards

D.Groups



A.Entities and relationships between entities

B.Hierarchical data structure

C.Data source and destination

D.Data flows between processes



A.Attribute.

B.Relation.

C.Degree.

D.Tuple.

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