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

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

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Trang 2: 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 [...]... 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... 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)... 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. .. 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... 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:... 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... 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... 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... 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... 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 . 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,. (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. 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

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