WGU University WGU-SPF Online Practice Questions and Exam Preparation

WGU University WGU-SPF Online Questions & Answers

• Question 121:

  Which phase of an agile application would create a function that calculates shipping costs based on an item's weight and delivery zip code?

  A. Implementation
  B. Analysis
  C. Design
  D. Testing
  A. Implementation

  ---

  In the Agile software development life cycle, the Implementation phase is where the actual coding and development of the project take place. This is the stage where a function to calculate shipping costs based on an item's weight and delivery zip code would be created. The Implementation phase involves translating the design and analysis work into functional software components. It's during this phase that developers write code and build features that will eventually be tested and refined in subsequent

  phases.

  References:

  Agile methodologies emphasize incremental development and delivery, where the Implementation phase is key for developing new functions. The Agile Software Development Life Cycle outlines the Implementation phase as the stage where the actual product development happens. Wrike's Agile Guide also describes the Implementation (or Iteration) phase as the time when the team builds the software.

• Question 122:

  A variable is declared as an integer. Which value can it store without causing a type error?

  A. 3.14
  B. "42"
  C. true
  D. 42
  D. 42

  ---

  An integer variable can store whole numbers without decimal points. The value 42 is a whole number and matches the integer data type. The value 3.14 is a floating-point number, "42" is a string, and true is a Boolean, all of which would cause a type mismatch if assigned to an integer variable.

• Question 123:

  What is the output of this code snippet?

  for i in range(2, 6):

  print(i, end=" ")

  A. 2 3 4 5 6
  B. 2 3 4 5
  C. 2 4 6
  D. 2 3 4
  B. 2 3 4 5

  ---

  range(2, 6) generates numbers from 2 to 5, inclusive of 2 but exclusive of 6.

• Question 124:

  A sequence diagram is shown:

  

  What is the purpose of a sequence diagram?

  A. It depicts program operations, branches, and loops.
  B. It outlines the needed computations.
  C. It illustrates the communication steps for a particular software scenario.
  D. It outlines the potential actions of a user
  C. It illustrates the communication steps for a particular software scenario.

  ---

  A sequence diagram is a type of interaction diagram that details how operations are carried out within a system. It is used to model the interactions between objects or components in a sequence that reflects the order of operations, particularly focusing on the messages exchanged between these objects over time. The vertical axis of a sequence diagram represents time, and the horizontal axis represents the objects involved in the interaction. The purpose of a sequence diagram is to illustrate the sequence

  of messages or events that occur between these objects, typically in the context of a specific use case or scenario within the software system1234.

  References:

  The information provided is based on standard practices in software engineering and UML (Unified Modeling Language) documentation. For further reading on sequence diagrams and their applications, you can refer to resources such as Visual Paradigm1, Creately2, IBM Developer3, and Lucidchart4.

• Question 125:

  What is an advantage of using a programming library?

  A. There is improved programmer productivity.
  B. Static program elements are visualized.
  C. There are more statements in a user's main function
  D. Programs need not run to yield results.
  A. There is improved programmer productivity.

  ---

  Programming libraries are collections of pre-written code that developers can use to optimize tasks and solve common problems efficiently. By using a library, developers don't have to write everything from scratch, which saves time and reduces the potential for errors. Libraries can provide solutions for user authentication, data visualization, animations, networking, and more, allowing developers to focus on the unique aspects of their projects rather than reinventing the wheel.

  References:

  Codingem's "What Is a Library in Programming? A Complete Guide". CareerFoundry's "What is a Programming Library? A Beginner's Guide". Robots.net's article on the importance of libraries in programming.

• Question 126:

  Which statement BEST describes the purpose of a programming library?

  A. To eliminate the need for algorithms
  B. To provide reusable code for common tasks
  C. To replace the compiler
  D. To define hardware behavior
  B. To provide reusable code for common tasks

  ---

  Programming libraries contain reusable code that performs common tasks, allowing developers to avoid rewriting standard functionality. This improves efficiency, consistency, and productivity in software development.

• Question 127:

  What is put to output by the following flowchart, if the input is 305?

  

  A. Backlog
  B. Interview
  C. Return
  D. interviewBacking
  B. Interview

  ---

  The flowchart provided in the image represents a decision-making process based on the input value. Given the input of 305, we follow the flowchart's decision paths. The first decision checks if the input is less than 200, which 305 is not, so we move to the next decision point. The second decision asks if the input is greater than 300. Since 305 is greater than 300, we follow the path for `yes' which leads us to the output "Interview". Therefore, the correct output for the input 305 according to the flowchart is

  "Interview".

  References:

  Understanding flowchart symbols and their usage in representing decision-making processes.

  Analyzing flowcharts to determine the output based on given input values. General principles of flowchart design and interpretation.

• Question 128:

  Which statement correctly checks if a variable x is even?

  A. if x % 2 == 0:
  B. if x / 2 == 0:
  C. if x == 2:
  D. if x % 2 != 0:
  A. if x % 2 == 0:

  ---

  The modulus operator % checks if x is evenly divisible by 2.

• Question 129:

  A software team has been commissioned to create an animation application. Which event takes place during the analysis phase in the Agile approach?

  A. Sending the application to customers for additional evaluation after new features are added
  B. Deciding to add five new capabilities to the animation application based on customer feedback
  C. Writing the code for five new capabilities
  D. Deciding that new capabilities in the animation application will be written as functions without the needs of any new objects
  B. Deciding to add five new capabilities to the animation application based on customer feedback

  ---

  In Agile, the analysis phase (often part of sprint planning or backlog refinement) involves gathering and refining requirements, typically as user stories or features, based on stakeholder input. According to foundational programming principles and Agile methodologies (e.g., Certiport Scripting and Programming Foundations Study Guide, Agile Manifesto), the analysis phase focuses on defining what the system should do.

  Agile Analysis Phase:

  Identifies and prioritizes requirements, often incorporating customer feedback.

  Produces user stories or feature lists (e.g., "add new animation effects").

  "Deciding that new capabilities in the animation application will be written as functions without the need for any new objects." This is incorrect. This decision involves technical design (e.g., choosing procedural vs. object-oriented approaches), which occurs in the design phase, not analysis.

  "Sending the application to customers for additional evaluation after new features are added." This is incorrect. This occurs during testing or deployment phases (e.g., sprint review or user acceptance testing), not analysis.

  "Deciding to add five new capabilities to the animation application based on customer feedback." This is correct. In Agile, analysis includes refining the product backlog by adding new features (capabilities) based on customer feedback, such as new animation effects or tools.

  "Writing the code for five new capabilities." This is incorrect. Writing code occurs during the implementation phase, not analysis.

• Question 130:

  Which expression evaluates to 3.7 if float x = 17.0?

  A. X + 2 / 10
  B. (2 + x) / 10.0
  C. X + 2.0 / 10
  D. 2 + x / 10
  D. 2 + x / 10

  ---

  A. X + 2 / 10:

  First, calculate 2 / 10, which is 0.2.

  Then add x (17.0) to 0.2, resulting in 17.2. This does not equal 3.7.

  B. (2 + x) / 10.0:

  First, add 2 and x (17.0), which gives 19.0.

  Then divide 19.0 by 10.0, resulting in 3.7.

  C. X + 2.0 / 10:

  First, calculate 2.0 / 10, which is 0.2.

  Then add x (17.0) to 0.2, resulting in 17.2. This does not equal 3.7.

  D. 2 + x / 10:

  First, divide x (17.0) by 10, which gives 1.7.

  Then add 2 to 1.7, resulting in 3.7.

  Therefore, option B is the correct expression.

  References:

  Mathway - Math Calculator

  Quizlet - Scripting and Programming Actual FINAL PREP- Foundations