Trắc nghiệm phân tích và thiết kế hệ thống potx

PT&TKHT

Tài liệu chỉ mang tính chất tham khảo, cấm sao chép dưới mọi hình thức
#: khuất câu hỏi hoặc đáp án
S ver. 2010
Nguồn:
Liên hệ: Sangcse/0168.4543269
Trang1:
Câu 1: A problem soling technique that decomposes a system its component parts while
focusing on the business problem independent of technology is:
a. Cause-and-effect analysis.
b. System design.
c. Joint application design(JAD).
d. Systems analysis.
Câu 2: A database is an organized collection of ____ related data.
a. None of the others answers.
b. logically.
c. not.
d. physically.
Câu 3: A technique for organizing and documenting a system’s data is called:
a. Physical modeling.
b. Logical model.
c. Attribute modeling.
d. Data modeling.
Câu 4: A software’s documentation is:
a. the instructions for using the software.
b. the data that user’s input into the computer when running the software.
c. the program code written by the computer programmer.
d. the purchase agreement for the software.
Câu 5: A description of a system that fouses on how the system will be materially
constructed refers to:

a. restricted view.
b. physiological reference.
c. logical system description.
d. physical system description.
Câu 6: All of the following are resources for a project EXCEPT which one?
a. people.
b. services.
c. materials.
d. land.
Câu 7: An interview report is prepared in which step of the interview process?
a. selecting an interview.
b. designing interview questions.
c. preparing for the interview.
d. conducting the interview.
Câu 8: Consulting people who have expertise in the companies operations is part of
which step in the data modeling process?
a. validating the model.
b. creating the data model.
c. planning the project.
d. determining system requirements.
Câu 9: Determining system requirements is:
a. a step in the physical data modeling.
b. a step in the data modeling process.
c. none of these answers.
d. a step in the logical data modeling.
Câu 10: During project inception the intent of the tasks are to determine
a. basic problem understanding.
b. nature of the solution needed.
c. people who want a solution.
d. All of these answers.

Câu 11: During business process engineering, three different architectures are examined.
A. application, data, technology infrastructure.
B. communications, organization, financial infrastructure.
C. network, database, reporting structure.
D. systems, requirements, data structure.
Câu 12: During which development phase of building a database system do we build the
data model?
a. requirements.
b. design.
c. application.
d. implementation.
Câu 13: During an interview, the following question is asked; “How many times during a
typical week does a customer complain about inadequate service following a sale?” This
question is an example of a(n) ____ question.
a. open-ended.
b. probing.
c. opinion.
d. closed-ended.
Câu 14: Everything external to a system that interacts with the system best defines
a. constraint.
b. process.
c. environment.
d. interface.
Câu 15: Gathering the information you need for data modeling by review specific
business documents handled within the system describes the:
a. investigative approach.
b. business approach.
c. top-down approach.
d. bottom-up approach.
Câu 16: A system that is cut off from its enviroment and does not interact with its

enviroment is a :
a. unresponsive system.
b. closed system.
c. entropic system.
d. open system.
Câu 17: Primary goal of system requirement analysis phase is :
a. to create a detailed Functional.
b. to create a detailed structure.
c. to create a detailed diagram.
d. all of these answers.
Câu 18: Project planning includes ____.
a. establishing methods to ensure consistent results.
b. obtaining project authorization, defining the project scope.
c. All of the other answersare steps in project planning.
d. building the project team.
Câu 19: Purpose of System Requirements Analysis :
A. is obtain a thorough and detailed understanding of the business need as defined in
Project Origination and captured in the Business Case.
B. break it down into discrete requirements
C. clearly defined, reviewed and agreed upon with the Customer Decision-Makers.
D. all of these answers
Câu 20: Question that have a simple, definitive answer are called
a. opinion questions.
b. multiple choice questions.
c. open-ended questions.
d. closed-ended questions.
Câu 21: RAD stands for:
a. Readily available deliveries.
b. Rapid Application Development.
c. Rapid Application Data.

d. Real Analogy Data.
Câu 22: Sara would like to give the interviewee more control over the interview and to
gather rich information. She should ask ____ questions.
a. open-ended opinion.
b. inappropriate.
c. probing
d. closed-ended
Câu 23: select the true option
a. Software engineers do not need to consider hardware when designing a computer-
based systems.
b. By following modern system engineering practices simulation of reactive system is no
longer necessary
c. The goal of product engineering is to translate the customer's desire for a set of
defined capabilities into working product.
d. All of are true.
Câu 24: 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 or 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 25: 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 requirements (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 on the effectiveness of the requirements
identification process (II)

D. (I) and (II)
Câu 26: : Select the true option:
A. The interviews are two types namely structured and unstructured.
B. User interviews are source for data modeling.
C. Interview is very important data gathering technique as in this the analyst directly
contacts system and the potential user of the proposed system.
D. All of these answers.
Câu 27: Software tools that provide automatied support for some portion of the systems
development process defines.
a. CAUSE.
b. Gantt
c. project management.
d. NOS.
Câu 28: Specifications that preserve the integrity of the logical data model are:
a. integrity restrictions.
b. requirements specifications.
c. business rules.
d. business limitations.
Câu 29: System study is the ______ stage of system development
a. First.
b. Second .
c. Last .
d. None of these answers.
Câu 30: Team reviews and user reviews are par of which step in the data modeling
process?
a. creating the data model.
b. planning the project.
c. determining system requirements.
d. validating the model.
Câu 31: The optimistic duration best described as which of the following

a. the estimated maximum amount of time to complete a task
b. the estimated amount of time required to complete a task
c. the estimated minimum amount of time needed to complete a task.
d. an estimated amount of time required to complete a task based on a weighted average.
Câu 32: The method that is used to assess economic feasibility is called:
a. cost/ benefit analysis.
b. development cost analysis.
c. sources and uses of funds analysis.
d. analysis of the time value of money
Câu 33: The most important role of a system analysis in business is
a. special programming skills.
b. problem solving.
c. technical understanding of information systems.
d. knowing that data needs to be stored and used.
Câu 34: The architecture components for product engineering are:
a. data, hardware, software, people.
b. data, documentation, hardware, software.
c. data, hardware, software, procedures.
d. documentation, hardware, people, procedures.
Câu 35: The information gathering technique that enables the anlyst to collect facts and
opinions from a wide range of geographically dispersed people quikly and with the least
expense is the ____.
a. observation.
b. questionnaire.
c. document analysis.
d. interview.
Câu 36: The system engineering process usually begins with the :
A. detailed view.
B. domain view.
C. element view.

D. world view.
Câu 37: The use of traceability tables helps to:
a. debug programs following the detection of run-time errors.
b. determine the performance of algorihm implementations.
c. identify, control, and track requirements changes.
d. none of the above.
Câu 38: The best way to conduct a requirements validation review is to :
a. examine the system model for errors.
b. have the customer look over the requirements.
c. send them to the design team and see if they have any concerns.
d. use a checklist of questions to examine each requirement.
Câu 39: The top level of the hierarchical model of a system is known as the:
a. AFD
b. DFD
c. SCD
d. SFD
Câu 40: The system specification describes the:
a. Function, perfomance and constraints of a computer-based system.
b. implementation of each allocated system.
c. element software architecture.
d. time required for system simulation.
Câu 41: The result of the requirements engineering elaboration task is an analysis model
that defines which of the following problem domain(s) ?
A. information.
B. functional.
C. behavioral.
D. all of the above.
Câu 42: The project team:
a. all of these answers.
b. may consult people who process the system.

c. may consult people who use the system.
d. may consult people who have expertise in the company’s operations while
determining systems rewuirements during the data modeling process.
Câu 43: The complex organization process through which computer-based information
systems are developed and maintained best defines:?
a. Information systems analysis design.
b. None of the others answers.
c. Prototyping.
d. Joint application design.
Câu 44: The first sub-phase of analysis is
a. requirements determination.
b. requirements structuring.
c. designing the human interface.
d. systems planning and selection.
Câu 45: The analysis of document can help you identify:
a. problems with existing systems.
b. the organizational direction that can information system requirements.
c. special information processing circumstances that occur irregularly and may not be
identified any other requirements determination technique.
d. the reason why current systems are designed the way they are.
Câu 46: The fists step in the interview process is to
a. select interviewees.
b. intimidate client(show your technical knowledge)
c. conduct the interview.
d. design interview questions.
Câu 47: The most important reason for investigating the current system and the needs for
the new system is to ____.
A. ensure that the requirements are understood before moving into the implementation
phase.
B. ensure that the key requirements are understood before moving into the design phase.

C. demonstrate progress to the project sponsor.
D. fulfill a step on the project workplan.
Câu 48: The most commonly used information-gathering technique is _____
a. interviewing.
b. joint application design (JAD) sessions.
c. questionnaires.
d. document analysis.
Câu 49: Three things that make requirements elicitation difficult problems of
a. scope.
b. understanding.
c. volatility.
d. all of these answers.
Câu 50: To construct a system model he engineer should consider which of the following
restraining factors?
a. assumptions (I)
b. budget.
c. constraints (II).
d. (I) and (II).
Câu 51: To do fact finding, the analyst does the following
a. Interviews personnel, prepares questionnaires, observes current system.
Gathers forms and documents currently in use.
b. All of the other answer.
c. Cost-benefit analys
Testing system.
d. Cost-benefic analysis
Developping system.
Câu 52: Traditional methods of collecting systems requirements include:
A. interview groups of people.
B. survey people via questionnaires.
D. individually interview people.

D. All of the others answers.
Câu 53: What is the first step in the data modeling process ?
a. validate model.
b. all of the others answers.
c. detemine requirements .
d. plan project.
Câu 54: What is a model ?
a. an object manages information and usually has one or more objects that depend on
that information to provide the required behavior.
b. an object that supplies information and usually has one or more objects that
depend on that information to provide the required behavior.
c. a textual description of an interaction with user interface.
d. none of these answers.
Câu 55: What is the difference between a model and a specification (or a software
system) ?
A. A model an abstract representation of a specification of a software system, from a
particular point of view. A specification is a description of the tasks that a software
system should be designed to carry out.
B. A model an abstract representation of a specification of a hardware system, from a
particular point of view. A specification is a description of the tasks that a software
system should be designed to carry out.
C. A model an abstract representation of a specification of a software system, from a
particular point of view. A specification is a description of the tasks that a hardware
system should be designed to carry out.
D. None of these answers.
Câu 56: What is NOT the relationship between requirements analysis and design?
a. During the design process, the requirements document can be modified.
b. Code is never written during either phase.
c. Requirements deal with “what?” and design deals with “how?”
d. Both invole inspections and test planning.

Câu 57: What is slack time?
a. time allowed by the project manager for the team members to take off before the start
of a project.
b. amount of delay that can be tolerated between the starting and end points of a
project.
c. amount of delay past the agreed due date that is used to calculate the reduction in pay
of the system analyst.
d. None of the above.
Câu 58: What are some of the ways cost estimation results are commonly used?
a. Determining how long a project will take
Determining whether any of the project should be outsourced or not.
b. Determining what tasks are to be done
Determining how many people using this system.
c. Determining what tasks are done
Determining what type of computer using this system.
d. Determining what type of operation system will be installed on this system
Determining how many people using this system.
Câu 59: What is the distinction between analysis and design in software development?
a. Analysis involves significant discussion with the customer about the detailed meaning
of what the system implies.
b. Analysis involves significant discussion with the customer about the detailed meaning
of what the system implies.
c. Design is about deciding on structures which can be justified as being necessary in
terms of efficiency, flexibility, re-use, and other factors, that is, in design, there is a
significant choice in the structures we produce.
d. All of these answers.
Câu 60: When discussing a data model under construction, users will speak in terms of
the _____ schema that they work with, which database developers must translate into a
______ schema.
a. external, conceptual.

b. internal, implementation.
c. internal, conceptual.
d. conceptual, implementation.
Câu 61: When of the following is false statement?
a. One of the most important steps in processing a data modeling process is to plan the
project.
b. In order to satisfy customer requirements, a project manager should allow as many
change requests as possible, during the software development phase.
c. The phases of building a database system are the requirements, design,
implementarion and application phases.
d. Going into design, most designers do not have a clear picture of what the customer
really wants.
Câu 62: Which best describle a graphical network model that depicts a project’s tasks and
the relationships between those tasks?
a. grant chart.
b. data flow diagram.
c. model driven analysis.
d. PERT chart.
Câu 63: Which of the following is not one of the three major classes of information
systems ?
a. Decision support system.
b. Collaboration system.
c. Managerment information system.
d. Transaction processing system.
Câu 64: Which elements of business processing engineering are the responsibilities of the
software engineer?
a. Business area analysis.
b. Business system design (I)
c. Construction and integration (II)
d. (I) and (II)

Câu 65: Which type of information systems helps the decision maker to make long term
decision ?
a. Decision support system.
b. Collaboration system.
c. Management information system.
d. Transaction processing system
Câu 66: Which phase of the software lifecycle is generally the most costly?
a. Maintenance.
b. Design.
c. Implementation.
d. Requirements.
Câu 67: Which of the following is NOT a role of a systems analyst?
a. Dictating the requirements of the system.
b. Undertanding everything possible about a business process.
c. Problem solving for an organization.
d. Technical understanding of information systems.
Câu 68: Which type of information systems automated handling of data about business
activities?
a. Decision support system.
b. Collaboration system.
c. Management information system.
d. Transaction processing system.
Câu 69: Which of the following can be elements of computer-bases systems?
a. Documentation.
b. Software, hardware.
c. People.
d. All of these answers.
Câu 70: Which of the following are components of an information systems architecture?
a. Processes.
b. Networks .

c. All of the others answers.
d. Data .
Câu 71: Which of the following is NOT a keyword or phrase to describe a project?
a. Complex.
b. One goal, within budget.
c. According to specification.
d. Single item.
Câu 72: Which of the following is the process of investigating a system, identifying
problems, and using the infomation to recommend improvements to the system?
A. System analysis.
B. Planning.
C. System design.
D. Implementation.
Câu 73: Which of the following is a true statement?
a. A business system is a subsystem of an information system.
b. Generally, information systems are closed systems.
c. Information systems can be seen as supersystems in an organizational environment.
d. Information systems can be seen as subsystems in larger organizational systems,
taking input from, and returning output to, their organizational environments.
Câu 74: Which of the following is not step in the data modeling process?
a. All of the other answersare steps in the data modeling process.
b. Planning the project, creating the data model.
c. Determining system requirements.
d. Validating the model.
Câu 75: Which of the following sources of database requirements won't the project team
use to determine system requirements?
a. Existing forms and reports.
b. Existing computer files and database.
c. All of these answers sources might be used to determine database requirements.
d. User interviews.

Câu 76: Which of the following is/are part of determining system requirements.
a. Documents.
b. Reports.
c. Forms.
d. All of these answers.
Câu 77: which of the following is not one of the context-free questions that would be
used during project inception ?
a. What will be the economic benefit from a good solution ?
b. Who is against this project?
c. Who will pay for the work?
d. Who will use the solution?
Câu 78: Which of the following is true statement?
a. Determining system requirements is NOT a step in the data modeling process.
b. Determining identifiers is done when system requirements are determined in the data
modeling process.
c. System analysis emphasizes the business problem; systems design focuses on the
technical or implementation concerns of the system.
d. The project team may use formally defined standards as a source of database
requirements while determining system requirements.
Câu 79:Which of the following sources of database requirements won’t the project team
use to determine system requirements?
a. All of the other answers sources might be used to determine database
requirements.
b. User interviews.
c. Existing forms and reports.
d. Existing computer files and database.
Câu 80: Which of the following is false statement?
a. Processing requirements document is one of the approaches used in the data modeling
process to find relationships.
b. Users always know exactly what is needed in a database.

c. Specifying entities takes place when the development team creates the data model
during the data modeling processing.
d. Requirements analysis is a project management activity.
Câu 81: Which does not come under review plan?
a. Administrative plan.
b. System testing plan.
c. Documentation review plan.
d. Hardware plan.
Câu 82: Which of the following are activities involved in managing project ?
a. Closing down the project.
b. Executing the project.
c. All of the others answers.
d. Planning the project.
Câu 83: _____ workflow uncovers the problems and identifies potential projects within a
user organization.
a. Requirements.
b. Analysis.
c. Implementation.
d. Business modeling.
Câu 84: Writing new classes and related programming activities are part of the ____
workflow.
a. Requirements.
b. Analysis.
c. Implementation.
d. Design.
Câu 85: A particular relationship between two attributes best defines:
a. structure.
b. context.
c. normal form.
d. functional dependency.

Câu 86: A single occurrence of an entity type defines:
a. attribute
b. entiy instance.
c. entity appearance.
d. data element.
Câu 87: A table’s primary key field
a. is a combination of two keys that make a foreign key.
b. is a always referenced by a foreign key in another tabe.
c. in a one to many relationship is also its own foreign key.
d. guarantees that each row is unique.
Câu 88: Action verbs are used in structured English to name:
a. sources.
b. entities.
c. processes.
d. data structures.
Câu 89: An entity is:
a. object, event, or concept
b. place.
c. all of these answers.
d. a person.
Câu 90: Each regular entity type in an E-R diagram is transformed into a:
a. row in a relation.
b. column in a relation.
c. tuple in a relation.
d. relation.
Câu 91: For a unary one-to-one relationship between two entities A and B, the
relationship is represented by:
a. adding the primary key of A as a foreign key of B
adding the primary key of B as a foreign key of A.
b. none of the others.

c. combining the two entities into one relation
adding the primary key of A as a foreign key of B.
d. combining the two entities into one relation
adding the primary key of B as a foreign key of A.
Câu 92: Given four image present relationship between two entities A and B. The
statement “Each instance of A is related to minimum of zero and a maximum of one
instance of B” correlative with image:
a. 1
b. 2
c. 3
d. 4
#
Câu 93: Question that have a simple, definitive answer are called:
a. closed-ended questions.
b. open-ended question.
c. multiple choice questions.
d. opinion questions.
Câu 94: Relationship has degree:
a. binary.
b. ternary.
c. n-ary.
d. all of these answers.
Câu 95: The relation state specifying that nonprimary key attributes do not depend on
other nonprimary key attributes is:
a. Boyce-Codd normal form.
b. first normal form.
c. third normal form.
d. second normal form.
Câu 96: The domain of an attribute:
a. is the collection of all possible values an attribute can have.

b. is a value an attribute can have.
c. is not the collection of all possible values an attribute can have.
d. all of these answers.
Câu 97: The basic types of connectivity for relations is/are:
a. one-to-one.
b. one-to-many.
c. many-to-many.
d. all of these answers.
Câu 98: The cardinality of a relationship:
a. is the actual number of related occurrences for each of the two entities.
b. is not the actual number of related occurrences for each of the two entities.
c. is the actual number of related occurrences for each of the n entities.
d. is the actual number of related occurrences for each of three entities.
Câu 99: The degree of a relationship:
a. is the number of entities associated with the relationship.
b. is the number of entities associated with the database.
c. is the number of relation associated with database.
d. none of these answers.
Câu 100: When each nonprimary key attribute is identified by the whole key relation is
said to be in at least:
a. fifth normal form.
b. second normal form.
c. third normal form.
d. fourth normal form.
Câu 101: Which is/are derived sttribute(s):
a. Name.
b. All of these answers.
c. Interest.
d. Social number.
Câu 102: Which of the following is not correct?

a. Entity Relationship Diagrams use four items; rectangles, circles, lines, degree of
relation (such as one to many).
b. Entity Relationship Diagrams show entities, how the entities interact and the attributes.
c. Entity Relationship Diagrams are a graphical approach to modeling that helps the user
design systems.
d. In transforming Entity Relationship Diagrams to a database, entities become tables.
Câu 103: Which of the following is not true regarding decision tables?
a. Structured English is more useful than decision tables when modeling the
complicated logic of a process.
b. Decision tables can model the relatively complicated logic of a process.
c. Decision tables allow you to check for the extent to which your logic is complete,
consistent, and not redundant.
d. Decision tables are compact.
Câu 104: Which of the following is not correct with regards to creating tables?
a. A primary key can be made from more than one attribute
b. All fields in a table need to depend upon (are identified by) the primary key or
the foreign key.
c. The 1st Normal form requires that only flat (rectangular) files exist.
d. One rule of designing tables for a database is to store the smallest meaningful value in
a field.
Câu 105: Which following are the different phases of software development?
a. System study
Feasibility study
System analysis.
b. System design
Coding
Testing.
c. Implementation
Maintenance.
d. All of these answers.

Câu 106: Which of the following processes can Structured English represent?
a. repetition.
b. all of the others answers.
c. sequence.
d. conditional statements.
Câu 107: With of the following is not true with regards to logical data diagrams?
a. a logical DFD will remain relative constant over time relative to its physical nature.
b. they document the physical structure of an existing system or proposed system.
c. they document the processes in an existing or proposed system.
d. Logical Data flow diagrams typically have lower levels (below the level-0 diagram) to
show details about the processes.
Câu 108: A Computer file or database, a transaction file, a set of tables, a manual file of
records are examples about:
a. data stores
b. data
c. entity
d. process
Câu 109: A conceptual schema is:
a. a complete logical view of the database
b. not a complete logical view of the database
c. a complete physical view of the database
d. none of these answer
Câu 110: A context diagram is a:
a. top level (I)
b. level 0 (II)
c. level 1
d. (I) and (II)
Câu 111: A data model is ____
a. transformed into tables and relationships
b. shown as an entity-relationship diagram

c. All of these answers
d. a logical representation of the structure of the database
Câu 112: A DBMS is a good tool for all of the following reasons except
a. Enforces data and procedural standards
b. Improves data security and integrity
c. Reduces data redundancy
d. Ensures data independence
Câu 113: A decision table is:
a. (I) & (II)
b. a two dimensional matrix
c. a table with various conditions and their corresponding action (I)
d. divided into four parts, condition stub, action stub, condition entry, and action entry(II)
Câu 114: A library includes books and borrower.
At any time a book may be borrowed by a single borrower.
A record is kept of the current location of each book and its borrowing history.
Select the ER diagram which best represents this scheme.
a. e
b. d
c. a
d. b
Câu 115: A person, place, object, event, or concept in the user environment about which
the organization wishes to maintain data refers to a(n):
a. process
b. data element
c. relationship
d. entity
Câu 116: A persons name, birthday, and social security number are all examples of
a. Descriptors
b. Entities
c. Relationships

d. Attributes
Câu 117: A relation is not allowed to have
a. Two columns with the same values
b. None of the others answers
c. Two columns with the same domain
d. Two columns with the same names
Câu 118: A system flowchart is primarily useful in analyzing and designing transaction
processing systems because it:
a. show relationships among the document, procedures and files
b. shows the detailed processing steps
c. supersedes the other documentation of the system
d. shows decisions affecting the systems
Câu 119: A type of documentation that contains the definition and the characteristics of
the data elements within a data base is known as a:
a. entity-relationship model
b. data model
c. data dictionary
d. data flow diagram
Câu 120: 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.)
If you want to map the above ER Diagram into tables, how many tables do you need?
a. 2
b. 5
c. 4
d. #

Câu 121: Advantages of logical DFDs is/are:
a. Better communication with users
b. More stable systems, since the design is based on a business framework
c. Increased understanding of the business by analysts
d. All of these answers
Câu 122: Advantages of logical DFDs:
a. Better communication with users. More stable systems
b. Better understanding of the business by analysts. Flexibility and maintenance
c. Elimination of redundancies and easier creation of the physical model
d. All of these answers
Câu 123: An entity type whose existence depends on another entity type is called a(n)
____ entity.
a. Variant
b. Co dependent
c. Strong
d. Weak
Câu 124: An entity that associates the instances of one or more entity types and contains
attributes specific to the relationships is called a (n)
a. Intersectional entity
b. All of the others answers
c. Associative entity
d. Connecting entity
Câu 125: An Context Flow Diagram we have
a. None of the other answers
b. Many entities and many processes
c. One process and more entities
d. One entity and more processes
Câu 126: Based on the Entity-Relationship model given below, which of the following is
true?
a. enroll:CLASS ::1:0

b. CLASS is optional in the STUDENT-CLASS relationship
c. CLASS:TEACHER::1:M
d. STUDENT:CLASS::1:0
Câu 127: Based on the Entity-Relationship model given above, which of the following is
false?
a. During the step in translating this E-R model to a set of relational tables, it is necessary
to create a table corresponding to the entity “CLASS”
b. During the step in translating this E-R model to a set of relational tables, it is necessary
to create a table corresponding to the entity “STUDENT”
c. During the step in translating this E-R model to a set of relational tables, it is
necessary to create a table corresponding to the entity “TaughtBy”
d. During the step in translating this E-R model to a set of relational tables, it is necessary
to create a table corresponding to the entity “enroll”
Câu 128: Based on the ER-diagram, which of the following are true?
a. (II) There can be multiple videos of the same movie
b. (III) There can be blank videos(i.e video without movies)
c. (I) and (II) are true
d. (I) One customer can rent multiple videos.
Câu 129: Breaking down the functions of a business into progressively finer detail is
called
a. Function decornposition
b. Business functional explosion
c. All of the others answers
d. Business detailing
Câu 130: Components of Data Flow Diagrams:
a. External entities, Process Flows, Datastores, Stores
b. External entities, Process Flows, Datastores
c. External entities, Process Flows, Stores
d. None of these answers
Câu 131: Consider the following relation definition and sample data in picture. Assume

that all of the functional dependencies and constraints are apparent in this data.
Which of the following statements is NOT true?
a. (TaskID.Phone->(TotalHours, ProjectID)
b. EmployeeName->ProjectID
c. (EmployeeName.ProjectID)->TaskID
d. EmployeeName->TotalHours
Câu 132: Consider the following relation definition and sample data in picture. Assume
that all of the functional dependencies and constraints are apparent in this data.
The set of candidate keys in this table are:
a. (ProjectID,EmployeeName).(ProjectID.TaskID).(EmployeeName.TaskID).(TaskID)
b. (ProjectID.EmployeeName).(ProjectID.TaskID).(EmployeeName.TaskID).(ProjectID)
c. (TaskID.ProjectID).(ProjectID.EmployeeName)
d. (EmployerName).(ProjectID).(TaskID)
Câu 133: Consider the table VEHICLES.(RegistrationNO, Owner, Model, Manufacturer,
NoCylinder) have primary key is RegistrationNo, with the following functional
dependencies:
RegistrationNo -> Owner, Model, Manufacturer
(Model, Manufacturer) -> NoCylinder
RegistrationNo -> NoCylinder
What is the HIGHEST normal form that this table, VEHICLES, is now in?
a. 3NF
b. 2NF
c. BCNF
d. 1NF
Câu 134: Data contained on a customer order form would be represented on a data flow
diagram as a:
a. data flow
b. source
c. sink
d. relationship

Câu 135: Data stores name should be a:
a. noun
b. verb
c. adjective
d. adverb
Câu 136: Designers generally start with lists and then move to sketches of the tables and
the relationships among them, called data-structure or ____ diagrams.
a. SE
b. Codd
c. R-E
d. Primary-key
Câu 137: DFDs are categorized as either:
a. logical(I)
b. physical(II)
c. (I) and (II)
d. None of these answers
Câu 138: Entity integrity is when:
a. Referential integrity has been upheld
b. Primary key values are unique
c. Entity relationship diagram is correct
d. There are no composite primary keys
Câu 139: External entities may be:
a. A person
b. A company or organization
c. Another system or subsystem
d. All of these answers
Câu 140: External Entity is:
a. a holding place for information within the system
b. a source or destination of a data flow which is outside the area of study
c. represented by a line, with arrowheads showing the direction of flow

d. all of these answers