CISS 230 Exam 2 Quiz Questions – Flashcards
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Which is the formula of the necessary sample size (n), where p is the proportion of the population having the attribute and p is the standard error of the proportion? Select one: A. n = p(1 + p) / ?p2 + 1 B. n = p(1 - p) ?p + 1 C. n = p(1 - p) / ?p2 + 1 D. n = p(1 - p) / ?p2
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C. n = p(1 - p) / ?p2 + 1
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What are the four steps to follow to design a good sample?
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1. Determine the data to be collected or described. 2. Determine the population to be sampled. 3. Choose the type of sample. 4. Decide on the sample size.
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Which prototype includes only some, but not all, of the components of the final system? Select one: A. nonworking scale model B. first-of-a-series prototype C. selected features prototype D. patched-up prototype
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C. selected features prototype
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Which of the following is not a basic activity of agile development? Select one: A. listening B. coding C. designing D. documenting
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D. documenting
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Based on their study of a group of programmers, the best programmers are ________ times more productive than the worst ones. Select one: A. one to two B. three to five C. four to eight D. five to ten
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D. five to ten
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A patched-up prototype is likely to be: Select one: A. controversial. B. inefficient. C. standardized. D. nonworking.
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B. inefficient.
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Which of these is a potential disadvantage of prototyping? Select one: A. shapes systems before problem is thoroughly understood B. slower development than the traditional SDLC C. more expensive than the traditional SDLC D. ineffective for helping users articulate requirements
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A. shapes systems before problem is thoroughly understood
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Which graphically characterize(s) data processes and flows through a business system? Select one: A. data dictionary B. design C. structured analysis D. data flow diagrams
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D. data flow diagrams
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Physical data flow diagrams: Select one: A. include processes for adding, updating, changing and deleting records. B. include no interface data flow in or out of processes. C. are used to model business events, along with their input and output. D. enable the analyst to better understand the business.
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A. include processes for adding, updating, changing and deleting records.
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The advantage of building data flow diagrams based on events is that: Select one: A. events are predictable and lend a high degree of stability to the data flow diagram. B. events fall into one of four categories: read, update, create, delete. C. users are familiar with the events within their business and know how the events drive other activities. D. events are small scale and easy to analyze for input and output.
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C. users are familiar with the events within their business and know how the events drive other activities.
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Which is not one of the four basic symbols used to chart data movement on data flow diagrams? Select one: A. an oval B. rectangle with rounded corners C. open-ended rectangle D. arrow
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A. an oval
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A logical data flow diagram: Select one: A. does not include any primitive processes. B. includes types of programs, such as online or batch. C. is a model of how the business operates. D. is a model of how the system will be implemented.
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C. is a model of how the business operates.
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List the five advantages of a logical data flow diagram.
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1. Better communication with users 2. More stable systems 3. Better understanding of the business by analysts 4. Flexibility and maintenance 5. Elimination of redundancies and easier creation of the physical model
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What is a reference work of data about data compiled by systems analysts? Select one: A. structured analysis B. design C. data dictionary D. data flow diagrams
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C. data dictionary
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A derived element is one that: Select one: A. is created by processes as a result of calculations or a series of decision-making statements. B. has the displayed length and the stored length the same. C. has several different meanings, one for each user group. D. is keyed, derived by the users.
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A. is created by processes as a result of calculations or a series of decision-making statements.
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A varchar data type: Select one: A. is used to represent elements for which the analyst needs to determine the length. B. is used to represent a floating point number with an indeterminate number of decimal positions.. C. is used for data that can contain any number of characters (up to the database limit). D. is an element that contains a check digit.
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C. is used for data that can contain any number of characters (up to the database limit).
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What does this symbol represent [ ]? Select one: A. either/or alternative B. iteration C. optional D. selection
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A. either/or alternative
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A synonym or other name for an element is called a(n): Select one: A. structural element. B. alias. C. common element. D. attributive element.
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B. alias.
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List the five main ways in which to use a data dictionary.
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1. Validate the data flow diagram for completeness and accuracy. 2. Provide a starting point for developing screens and reports. 3. Determine the contents of data stored in files. 4. Develop the logic for data flow diagram processes. 5. Create XML (extensible markup language).
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When selection is indicated for elements in the data dictionary: Select one: A. a simple sequence of structured English statements is all that is necessary. B. DO WHILE, DO UNTIL, or PERFORM UNTIL structured English statements must be included. C. a decision tree must be used to depict the logic. D. an IF...THEN...ELSE structure must be present in the structured English statements.
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D. an IF...THEN...ELSE structure must be present in the structured English statements.
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Unlike the decision tree used in management science, what doesn't the analyst's tree contain? Select one: A. actions B. outcomes C. decisions D. conditions
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B. outcomes
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Which is not one of three main advantages of a decision tree over a decision table? Select one: A. sequential structure of decision tree branches B. more correct as a communication tool C. conditions and actions of decision trees are found on some branches D. more readily understood
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B. more correct as a communication tool
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A goal of producing process specifications is to: Select one: A. validate the system design, including data flow diagrams and the data dictionary. B. design computer input and output processes. C. reduce process interactions. D. build technical specifications for a specific computer language.
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A. validate the system design, including data flow diagrams and the data dictionary.
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Which of the following is not a goal of producing process specifications? Select one: A. to reduce the time it takes for a process to run B. to reduce the ambiguity of the process C. to obtain a precise description of what is accomplished D. to validate the system design
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A. to reduce the time it takes for a process to run
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When structured decisions are not complex, an appropriate technique for analyzing the decision process is the use of ________. Select one: A. structured English B. CASE tools C. decision trees D. decision diagrams
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A. structured English
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When creating process specifications, what needs to be done for manual tasks? Select one: A. Replace them with automated processes. B. Create well-defined procedures for employees performing the tasks. C. Outline the decisions using a decision tree. D. Nothing, they are not part of processing specifications.
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B. Create well-defined procedures for employees performing the tasks.
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What are the three reasons for producing process specifications?
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1. To reduce the ambiguity of the process 2. To obtain a precise description of what is accomplished, which is usually included in a packet of specifications for the programmer 3. To validate the system design
