Trắc nghiệm 300 câu phân tích và thiết kế hệ thống potx

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Câu 161: Partitioning DFDs:
a. The process of analyzing a DFD and deriving a series of manual procedures
b. Adding controls to ensure the processes are done property
c. The process of analyzing a DFD and deriving a series manual procedures and
computer programs
d. None of these answers
Câu 162: Physical data flow diagram:
a. describing processes in greater detail
b. show sequencing processes in the order they must be executed
c. show how the system operates or how the new system will be implemented
d. all of these answers
Câu 163: Physical DFDs
a. show how the system is or will be constructed.
b. not concerned about how the system is or will be constructed.
c. concerned about how the system is or will be constructed.
d. none of these answers.
Câu 164: Process names should be in the form:
a. verb
b. adjective
c. noun
d. All of these answers
Câu 165: Select option(s) not true:
a. All of these answers.
b. The database community has developed a series of guidelines for ensuring that
databases are normalized
c. A database to be in 2NF, it must first fulfill all the criteria of a 1NF database
d. Realization is the process of breaking up the data into several tables, so as to
minimize the number of times we have to repeat the same data
Câu 166: Select the false statement:
a. Requirements engineering is a generic process that does not vary from one software

project to another.
b. It is relatively common for different customers to propose conflicting requirements,
each arguing that his her version is the right one.
c. A stakeholder is anyone who will purchase the completed software system under
development.
d. None of these answers.
Câu 167: Select the error(s) in DFDs:
a. Connecting data stores and external entities directly to each other.
b. Incorrectly labeling processes and/or data flow.
c. Forgetting to include a data flow or pointing an arrowhead in the wrong direction
d. All of these answers
Câu 168: Select the false statement (about DFDs):
a. Data that travel together should be in the same data flow
b. Data should be sent only to the processes that need the data
c. A data store within a DFD usually needs to have an input data flow
d. label a process with an IF-THEN statement
Câu 169: Select the true statement:
a. System Requirements Analysis can be a challenging phase, because all of the major
Customers and their interests are brought into the process of determining requirement.(I)
b. System Requirements Analysis can’t be a challenging phase, because all of the major
Customers and their interests are brought into the process of determining requirements.
c. The quality of the final product is highly dependent on the effectiveness of the
requirements identification process(II)
d. (I) and (II)
Câu 170: Select the true statement:
a. Datastore is used to store data
b. None of these answers
c. The terms datastore and database are interchangeable
d. Database is used to store data
Câu 171: Select the true statement:

a. Context diagram contains one process node that generalizes the functiob of the
entire system in relationship to external entities.
b. Context diagram haven’t process node that generalizes the function to the entire system
in relationship to external entities.
c. Context diagram contains two process node that generalizes the function of the entire
system in relationship to external enties.
d. Context diagram contains many process node that generalizes the function of the entire
system in relationship to external entities.
Câu 172: Select the right option(s):
a. The notion of database normalization was developed reduce data redundancy as
much as possible.
b. All of these answers.
c. There are two goals of the normalization process: eliminating redundant data (for
example, storing the same data in more than one table) and ensuring data dependencies
make sense?(only storing related data in a table).
d. Normalization is the process of efficiently organizing in a database.
Câu 173: Select the true statement:
a. External entities represent people or organizations outside of the system being studied.
b. External entities shows the initial source and final recipient of data and information.
c. External entities should be named with a noun, describing that entity.
d. All of these answers.
Câu 174: Suppose you have a table with fields CAR_ID, CAR_NAME,
STICKER_PRICE, QUOTE_PRICE and DEALER, and that the following functional
dependencies exist:
CAR_ID -> CAR_NAME
CAR_ID -> STICKER_PRICE
CAR_ID -> DEALER
DEALER -> QUOTE_PRICE
Which attribute(s) may be key attributes for a 3NF table?
a. CAR_ID and DEALER

b. CAR_ID
c. CAR_NAME, STICKER_PRICE, and DEALER
d. None of the others answers
Câu 175: Suppose you have a table with fields A, B, C and D. The functional
dependencies in the table are as follows:
A,B -> C
A,B -> D
D -> C
a. BCNF
b. 3 NF
c. 2 NF
d. 1 NF
Câu 176: Suppose you have a table with fields A, B, C and D. The functional
dependencies in the table are as follows:
A -> B,C,D
C -> A,B,D
B -> A
What is the highest normal form this table can be in?
a. 2 NF
b. 1 NF
c. 3 NF
d. BCNF
Câu 177: Suppose you have a table with fields A, B, C and D. The functional
dependencies in the table are as follows:
B,C -> A,D
C -> D
What is the highest normal form this table can be in?
a. 1 NF
b. 3 NF
c. 2 NF

d. BCNF
Câu 178: The conservation of inputs and outputs and outputs to a data flow diagram
process when that process is decomposed to a lower level defines:
a. Decomposition
b. Conservation
c. Data flow structuring
d. balancing
Câu 179: The DFD Figure Bookstore’s Text book Inventory System is known as a ____.
a. Context level DFD
b. ERD
c. Bottom level DFD
d. Level 1 DFD
Câu 180: The field used to id records in a database table is known as the:
a. Primary Key
b. Relational Column
c. Query Identifer
d. Row
Câu 181: The notion of database normalization was developed to
a. reduce data intefrity.
b. increase data integrity.
c. increase data redundancy.
d. reduce data redundancy.
Câu 182: The notion of database ____ was developed to reduce data redundancy.
a. schema
b. key
c. normalization
d. redundancy check
Câu 183: The relationship between two entity types A and B is 1:1, and the relationship is
optional at the A end. Only 50% of B entities are related to an A entity. Now consider
mapping these entity types into relations. Select the best statement from the following

list:
a. A and B should kept separate with the foreign key in the A relation.
b. A and B should kept separate with the foreign key in the A and B.
c. A and B should kept separate with the foreign key in the B relation.
d. B should be subsumed by A
Câu 184: This is:
a. DFD level 0 (I)
b. Context diagram (II)
c. DFD level 1
d. (I) and (II)
Câu 185: Use a Data Flow Diagram (DFD) to:
a. show the relationships among the business process within an organization to external
systems
b. show the relationships among the business process within an organization to external
organizations
c. show the relationships among the business process within an organization to customers
d. All of these answers
Câu 186: What are Data Flow Diagram?
a. Data flow diagrams illustrate how data is processed by a system in term of inputs
and outputs.
b. Data flow diagrams illustrate how data is processed by a system in term of inputs.
c. Data flow diagrams illustrate how data is processed by a system in term of outputs.
d. None of these answers.
Câu 187: Which of the following is not basic rule of normalization?
a. specify a unique field in each table to act as the primary key.
b. prevent values in a table from being relational.
c. minimize redundant data in individual tables.
d. create a separate entity table for each set of related data.
Câu 188: Which of the following is correct about referential integrity?
a. (I) and (III) are true

b. (II) ensures tables are up to date
c. (I) show how tables are related to each other
d. (III) prevents data tables from having orphans
Câu 189: Which of the following is not correct with regards to creating tables?
a. The 1st Normal form requires that only flat (rectangular) files exist.
b. A primary key can be made from more than one attribute
c. All fields in a table need to depend upson (are identified by) the primary key or
the foreign key.
d. One rule of designing tables gor a database is to store the smallest meaningful value in
a field.
Câu 190: Which of the following is not a function of the requirements phase of building a
database system?
a. specify data items
b. build the data model
c. define constraints and rules
d. create tables
Câu 191: Which of the following is not a key element of E-R models?
a. objects
b. identifiers
c. attributes
d. entities
Câu 192: Which of the following is not a phase of building a database system?
a. implementation
b. application
c. design
d. requirements
Câu 193: Which of the following is not true with regards to logical data flow diagrams?
a. they document the physical structure of an existing system or proposed system.
b. Logical Data flow diagrams typically have lower levels (below the level-0 diagram) to
show more details about the processes.

c. they document the processes in an existing or proposed system.
d. a logical DFD will remain relatively constrant over time relative is physical nature.
Câu 194: Which of the following is NOT true:
a. Querie are helpful for finding particular records from a database
b. SQL is not as flexible as the QBE interface provided by Access
c. Queries can perform mathematical calculations on the data in a database
d. A query is essentially a mechanism for extracting data from a database
Câu 195: A composite attribute is an attribute that ____.
a. is an identifier
b. is multi-value
c. consists of a group of attributes
d. describes a characteristic of the relationship
Câu 196: A data dictionary:
a. contains entries specifying the different elements of a data flow
b. all of these answers
c. a set of rigorous definitions of all DFD data elements and data structures
d. is a structured repository of data about data
Câu 197: A data model is
a. a logical representation of the data of the database
b. a logical representation of the structure of the database
c. a physical representation of the structure of the database
d. a physical representation of the data of the database
Câu 198: A decidion table does not include:
a. action stubs
b. condition stubs
c. statements
d. rules
Câu 199: A DFD:
a. views a system as a function that transforms the inputs into desired outputs
b. shows the flow of data through a system

c. all of these answers
d. shows the movement of data through the different transformation or process in the
system
Câu 200: A file folder containing orders is represented on a data flow diagram as a:
a. process
b. data flow
c. data store
d. source
Câu 201: A supplier of auto parts to our company is represented on a data flow diagram
as a:
a. source
b. data flow
c. data store
d. process
Câu 202: ACME places orders with their suppliers using the following purchase order
form. A buyer (an employee in the company) will fill the order form to order one or more
items from a supplier. Each such order us placed with a single supplier and can be for one
or more items.
Based on the information, an E-R diagram is draw below to represent the connectivity,
cardinality, and optionality of the relationships. (Note: In the ERD below, “order-line”
represents each line of item in the order form.)
Suppose you correctly map the above ER Diagram into tables, how many tables need to
have foreign keys?
a. 6
b. 5
c. 4
d. 2
Câu 203: A modeling technique that allows you to represent a set of conditions and the
actions that follow from them in a tabular format best describes:
a. Structured English

b. data flow diagram
c. decision table
d. decision tree
Câu 204: A name two-dimensional table of data is a:
a. tree-structure
b. relation
c. tuple
d. network
Câu 205: A square on a data flow diagram represents a:
a. process
b. data store
c. data flow
d. source/sink
Câu 206: An actor is:
a. Linked to a single use case
b. The system database
c. The role of a use case
d. None of these about
Câu 207: An association between the instances of one or more entity types that is of
interest to the orfanization best defines:
a. cardinality
b. occurrence
c. coupling
d. relationship
Câu 208: An attribute (or combination of attributes) that uniquely identifies each instance
of an entity type defines:
a. data element occurrence
b. gerund
c. candidate key
d. trigger

Câu 209: An identifier may be____.
a. all of the other answers
b. composite
c. unique
d. a single attribute
Câu 210: Assume the first condition has four values; the second condition has two values;
the third condition has two values. How many rules will there be?
a. 7
b. 16
c. 24
d. 8
Câu 211: Attributes may be ____ attributes.
a. composite, multi-value
b. element
c. inherit
d. all of the other answers
Câu 212: Components of a decision tree include:
a. decidion points
b. states
c. rules
d. stubs
Câu 213: Data Flow:
a. is not have name
b. must have a name
c. sometime have a name
d. none of these answer
Câu 214: Data flow diagrams that concentrate on the movement of data between
processes are referred to as:
a. data models
b. flow charts

c. process models
d. flow models
Câu 215: Entities have ____ that describe the entity’s characteristics.
a. identifiers
b. relationships
c. attributes
d. orders
Câu 216: Entity-relationship diagram is used for
a. Menu design
b. System analysis
c. Data design
d. System design
Câu 217: Everry true entity has a(n) ____
a. M-to-N relationship
b. identifier
c. N-to-1 relationship
d. 1-to-1 relationship
Câu 218: For a relationship to be considered a binary relationship it must satisfy which of
the following conditions?
a. It must involve exactly two entity classes
b. It must have a maximum cardinality of 1:1
c. None of the others answers
d. It must have a maximum cardinality of 1:N
Câu 219: If an input from a source appears at level-0, it must:
a. be connected to a data flow
b. be connected to a data store
c. appear on the connected to sink
d. appear on the context diagram
Câu 220: If order number serves as the primary key in the ORDER relation and also
appears as a nonprimary key attribute in the INVOICE relation, then order number is said

to be a:
a. candidate key
b. pointer
c. relationship key
d. foreign key
Câu 221: If STUDENT and COUSE participate in a relationship, their relationship is
a(n):
a. ternary relationship
b. extraordinary relationship
c. binary relationship
d. unary relationship
Câu 222: In collaborative requirements gathering, the facilitator
a. cannot be a member of the software team
b. cannot be a customer
c. controls and facilitates the process
d. must be an outsider
Câu 223: In DATA FLOW DIAGRAMS, symbol in picture are
a. PROCESS
b. DATAF LOW
c. STORE
d. SOURCE
Câu 224: If entity B is a mandatory participant, then:
a. the minimum cardinality of the relationship optional
b. the minimum cardinality of the relationship is one
c. the minimum cardinality of the relationship cannot be defined
d. the minimum cardinality of the relationship is two
Câu 225: Data Flow:
a. is not have name
b. must have a name
c. sometime have a name

d. none of these answers
Câu 226: Recording a customer’s payment is represented on a data flow diagram as a:
a. data store
b. process
c. data flow
d. source
Câu 227: Software designed to support the payroll function would best be classified as:
a. application software
b. design software
c. analysis software
d. system software
Câu 228: Specifying entities is part of which step in the data modeling process?
a. determining system requirements
b. it is not part of any of the others stpes in the data modeling process
c. validating the model
d. creating the data model
Câu 229: Stored procedures is a function:
a. of the development phase of building a database system
b. of the design phase of building a database system
c. only used in programming
d. of the phase analysis system
Câu 230: Studying the current system and proposing alternative replacement systems best
defines:
a. logical design
b. prohect initiation and planning
c. analysis
d. physical design
Câu 231: Technique used for modeling process decision logic include:
a. Structured English
b. decision tree

c. all of the others answers
d. decision tables
Câu 232: The diagram that shows the scope of the system, indicating what elements are
inside and which are outside the system, is called a:
a. level-2 diagram
b. referencing diagram
c. context diagram
d. representative diagram
Câu 233: Two entities can be related as One-to-one (1:1):
a. An instance of entity ‘A’ can relate to one and only one instance of entity ‘B’ and
an instance of ‘B’ can relate to only one instance of ‘A’. For example, a husband can
have only one wife, and a wife can have only one husband.
b.
a. An instance of entity ‘A’ can relate to one or more instance of ‘B’ while an instance od
‘B’ can relate to one or more instances of ‘A’. For example, an uncle can have many
nephews, and a nephew can have many uncles.
c. None of these answers.
d. One instance of entity ‘A’ can relate to one or many instances of entity ‘B’, but an
instance of ‘B’ can relate to only one instance of ‘A’. For example, a mother can have
many children, but a child can have only one mother.
Câu 234: The line that marks the inside and outline of system, and that sets off the system
from its environment, best defines:
a. delineation mark
b. boundary
c. interface
d. scope
Câu 235: The lowest level of DFDs is called:
a. context diagrams
b. level-1 diagrams
c. primitive data flow diagrams

d. level-0 diagrams
Câu 236: The primary deliverable from logical database design is:
a. normalized relations
b. a list of alternatives design strategies A decision table does not include
c. design specifications
d. an updated baseline project plan
Câu 237: The process of converting comlex data structures into simple, stable data
structures is referred to as:
a. normalization
b. structuring
c. simplification
d. process modeling
Câu 238: The representation of a particular entity is called a(n)
a. entity instance
b. entity relationship
c. entity attribute
d. entity class
Câu 239: The system model template contains which of the following elements:
a. input
b. output
c. user interface
d. all of the above
Câu 240: The work products produced during requirement elicitation will vary depending
on the
a. size of the budget
b. size of the product being buill
c. software process being used
d. stakeholders needs
Câu 241: The origin and/or destination of data, sometimes referred to as external entities
defines:

a. data store
b. source/sink
c. data flow
d. entities
Câu 242: UML notations that can be used to model the hardware and software elements
of a system are
a. Activity diagrams
b. Class diagrams
c. Deployment diagrams
d. All of these answers
Câu 243: Use Case Model provides:
a. None of these answers
b. blacks-box
c. Outside-in view of system functionality
d. All of these answers
Câu 244: Use Case Model consists of:
a. Actors
b. Use Cases
c. Relationships
d. All of these answers
Câu 245: Using relational notation, an attribute of relation that is the primary key of
another relation is indicated by:
a. italics
b. a dashed underline
c. an underline
d. a circle
Câu 246: When changing the minimum cardinality on the parent side of the relationship
from zero to one, the foreign key ____.
a. must be changed to a composite key
b. must changed to a surrogate key

c. must be changed from NOT NULL to NULL
d. must be changed from NULL to NOT NULL
Câu 247: When dropping a primary key column from a table, which of the following step
are NOT include in the process [the order of the steps listed below is not relevant, only
the steps themselves]?
a. drop the foreign keys in other tables based on the primary key column
b. drop the primary key constraint from the table
c. drop the doreign key column from the table
d. drop the primary key column from the table
Câu 248: When designing the tables from an E-R diagram, the ____ becomes the table
name
a. Entity, Entity class
b. None of these answers
c. Attribute
d. Relationship
Câu 249: When transforming an Extended E-R model into a relational database design
and creating a table for a weak entity that is not ID-dependent, ____.
a. a composite primary key must be created for that dependent
b. a composite primary key must be created for the weak entity
c. deletions and updates must cascade drom the parent the child
d. the primary key of the strong entity must be placed as part of the primary key in the
weak entity
Câu 250: When transforming an E-R diagram into normalized relations, the identifier of
the entity type becomes:
a. a secondary key in the corresponding relation
b. the foreign key in the corresponding relation
c. a nonkey attribute in the corresponding relation
d. the primary key of the corresponding relation
Câu 251: Which of following is not a UML diagram used creating a system nalaysis
model?

a. activity diagram
b. class diagram
c. dataflow diagram
d. state diagram
Câu 252: Which of the following addresses the rules concerning the relationships
between entity types?
a. triggering operations
b. entity integrity
c. referential integrity constraints
d. domains
Câu 253: Which of the following is not a logic model?
a. Structured English
b. decision tables
c. data flow diagrams
d. decision trees
Câu 254: Which of the following is not a true statement regarding a relation?
a. Each row in a relation corresponds to an attribute of that relation
b. Each relation consists of a set of named columns and an arbitrary number of unnamed
rows.
c. An entry at the intersection of each row and colum has single value
d. Each column in a relation corresponds to an attribute of that relation
Câu 255: Which of the following is not a true statement regarding data flows?
a. A data flow has a noun phrase label
b. A data flow has only one direction of flow between symbols
c. A fork in a data means that exactly the same data goes from a common location to two
more different processes, data stores, or sources/sinks
d. A data flow can go directly back to the same process it leaves
Câu 256: Which of the following properties of a relation states that an entry at the
intersection of each row and column is single-valued?
a. Each row is unique

b. Entries in columns are from the same set of values
c. The sequence of rows is insignificant
d. Entries in cell are simple
Câu 257: Which of the following skills is the most important for the systems analyst to
process?
a. all of the others answers
b. interpersonal skills
c. analytical skills
d. technical skills
Câu 258: Which type of identifier is used to identify a set of instances of a given entity?
a. non-unique
b. unique
c. class
d. attribute
Câu 258: A is a(n) ____ .
a. entity
b. object
c. actor
d. class
Câu 259: A(n) ____ is an attribute or group of attributes that uniquely identifies an entity
instance.
a. identifier
b. entity object
c. category
d. subtype
Câu 260: Based on the Entity-Relationship model given, which of the following is true?
a. A student can enroll in several classes, each of which is taught several teachers
b. A teacher can teach several students in several classes
c. A class can have several teachers
d. All of the others answers

Câu 261: Basic type(s) of structured statements are employed to describe the process:
a. Sequence Structures
b. Decision Structures
c. Iteration Structures
d. All of these answers
Câu 262: Consider the table ACCOUNTS (AccountNo, Name, TimeStamp, Balance,
Address), with the following functional dependencies:
(primary key of this table is [AccountNo, TimeStamp] )
AccountNo -> Name, Address
(AccountNo, TimeStamp) -> Balance
What is the HIGHEST normal mform that this table, ACCOUNTS, is now in?
a. BCNF
b. None of the others answers
c. 2NF
d. 3NF
Câu 263: In Data Flow Diagram, SOURCE
a. represents a table within a database. It cannot transform data, and usually contains one
inflow and one outflow. A store should be named with a noun that reflects its purpose.
b. indicates a flow of data(but not physical objects, such as a book). It should connect at
each end directly to its source and destination with one arrowhead, and should not cross
other arrows.
c. provides the inflow to a process. It should be named as a person, place or thing. A
source can only be connected a process.
d. transforms data, and must have at least one inflow and one outflow. It should be named
with an active verb followed by a noun that reflects what transformation the process is
making to the data passing through it A process should not be used to indicate timing,
sequence or decision
Câu 264: If each employee can have more than one skill, then skill is referred to as a:
a. repeating attribute
b. multivalued attribute

c. gerund
d. nonexclusive attribute
Câu 265: In Data Flow Diagram, STORE
a. indicates a flow of data(but not physical objects, such as a book). It should connect at
each end directly to its source and destination with one arrowhead, and should not cross
other arrows.
b. transforms data, and must have at least one inflow and one outflow. It should be named
with an active verb followed by a noun that reflects what transformation the process is
making to the data passing through it A process should not be used to indicate timing,
sequence or decision
c. provides the inflow to a process. It should be named as a person, place or thing. A
source can only be connected a process.
d. represents a table within a database. It cannot transform data, and usually
contains one inflow and one outflow. A store should be named with a noun that
reflects its purpose.
Câu 266: In picture, (i) is
a. Extend
b. Include
c. Communicate
d. Generalization
Câu 267: In picture, (ii) is
a. Generalization
b. Include
c. Extend
d. Communicate
Câu 268: In picture, (iv) is
a. Communicate
b. Include
c. Generalization
d. Extend

Câu 269: In sequence diagram, this is:
a. Iterations
b. Assignments
c. Recursion
d. Conditional Message
Câu 270: In sequence diagram, this is:
a. Recursion
b. Assignments
c. codition
d. none of these answers
Câu 271: In terms of generalization hierarchies, the characteristic of “inheritance” means
that:
a. the attributes of an instance of the supertype include the attributes of the subtype
b. an instance of the supertype must belong to one of the subtypes
c. there is a redundant relationship among instances of the subtype
d. the attributes of an instance of the subtype include the attributes of the supertype
Câu 272: In picture, (iii) is
a. Include
b. Extend
c. Communicate
d. Generalization
Câu 273: In the UML-style entity class ORDERS shown above, “GetOrderNo( )” is a (n)
____ .
a. public constraint
b. public method
c. protected method
d. private method
Câu 274: In the UML-style entity class ORDERS, “SumOfOrders” is ____.
a. a method
b. a constraint

c. a class attribute
d. an entity attribute
Câu 275: In this image, condition message is:
a.[among<= payer.availableFunds] withdraw(among)
b.[among<= payer.availableFunds]
c. deposit(amount)
d. none of these answers
Câu 276: In UML, an abstract class is:
a. A class that cannot have instances
b. A class that inherits nothing from other classes
c. A class with no attributes
d. A class with no associations
Câu 277: In UML, an attribute that is accessible only by methods of its entity class or of
its subclasses is said to be ____.
a. private
b. public
c. exclusive
d. protected
Câu 278: In UML, an attribute preceded by a ____ is “protected.”
a. +
b. !
c. @
d. #
Câu 279: In UML-style E-R diagrams, which of the following would be sonsidered a
attribyte of the entity class CUSTOMER?
a. Customer Number(meaning, an assigned number to uniquely identify a customer)
b. Customer Address(meaning, the street, city, state, and zip code of the customer’s
residence)
c. Customer Name(meaning, the first and last name of the customer)
d. All of these answers

Câu 280: In UML, an attribute that is accessible only by methods of its entity class is said
to be ____ .
a. exclusive
b. private
c. protected
d. public
Câu 281: Sequence Structures:
a. is a single step or action included in a process
b. is independent of the existence of any condition and when encountered it is always
taken
c. Usually numerous such instructions are used together to describle a process
d. all of these answers
Câu 282: System study is the ____ stage of system development
life cycle.
a. First
b. Second
c. Last
d. None of these answers
Câu 283: The dotted line below the boxes is called the ____ .
a. controller line
b. boundary line
c. actor line
d. Idelien
Câu 284: The following is a Class draw using UML notations
SetPosition(service) is
a. protected
b. public
c. none of the other answers
d. private
Câu 285: The following is a Class Circle draw using UML notations

Visible is
a. abtraction
b. attribute
c. service
d. method
Câu 286: : The following is a Class Circle draw using UML notations
isVisible (service) is
a. private
b. none of the other ansers
c. public
d. protected
Câu 287: The following is a Class Circle draw using UML notations
Position (attribute) is
a. static
b. protected
c. public
d. private
Câu 288: The following question refer to the sequence diagram below:
F is a(n) ____ object.
a. actor
b. lifeline
c. entity
d. boundary
Câu 289: The following question refer to the sequence diagram below:
C is a(n) ____ object.
a. controller
b. boundary
c. entity
d. actor
Câu 290: The following question refer to the sequence diagram below:

G is a(n) ____ object.
a. controller
b. boundary
c. actor
d. entity