WGU University WGU-SPF Online Practice Questions and Exam Preparation

WGU University WGU-SPF Online Questions & Answers

• Question 51:

  Which two types of operators are found in the code snippet not (g != S)?

  A. Equality and arithmetic
  B. Assignment and arithmetic
  C. Equality and logical
  D. Logical and arithmetic
  C. Equality and logical

  ---

  The code snippet not (g != S) contains two types of operators:

  Equality Operator (!=): The expression g != S checks whether the value of g is not equal to the value of S. The != operator is used for comparison and returns True if the values are different, otherwise False.

  Logical Operator (not): The not operator is a logical negation operator. It inverts the truth value of a Boolean expression. In this case, not (g != S) evaluates to True if g is equal to S, and False otherwise. Therefore, the combination of these two operators results in the overall expression not (g != S).

  References:

  The concept of equality and logical operators is covered in programming documentation and tutorials, such as GeeksforGeeks1 and Real Python2. The Python documentation provides details on logical operators and their usage.

• Question 52:

  A programmer is writing code using C. Which paradigm could the programmer be using?

  A. A procedural paradigm using dynamic types
  B. A procedural paradigm using sialic types
  C. A functional paradigm using dynamic types
  D. An event-driven paradigm using static types
  B. A procedural paradigm using sialic types

  ---

  C is a programming language that primarily follows the procedural programming paradigm1. This paradigm is a subset of imperative programming and emphasizes on procedure in terms of the underlying machine model1. It involves writing a sequence of instructions to tell the computer what to do step by step, and it relies on the concept of procedure calls, where procedures, also known as routines, subroutines, or functions, are a set of instructions that perform a specific task1. The procedural paradigm in C uses static typing, where the type of a variable is known at compile time1. This means that the type of a variable is declared and does not change over time, which is in contrast to dynamic typing, where the type can change at runtime. C's type system requires that each variable and function is explicitly declared with a type and it does not support dynamic typing as seen in languages like Python or JavaScript1. References: 1: Introduction of Programming Paradigms - GeeksforGeeks

• Question 53:

  Which programming paradigm focuses on data and the operations that act on that data as a single unit?

  A. Procedural
  B. Functional
  C. Object-oriented
  D. Markup
  C. Object-oriented

  ---

  Object-oriented programming organizes software into objects that combine data (attributes) and operations (methods). This paradigm supports concepts such as encapsulation and abstraction, improving modularity and maintainability.

• Question 54:

  What are two examples of valid function calls? Choose 2 answers.

  A. function sample(float 2.0)
  B. GetHeight(integer 3, 4)
  C. round(4.723, 2)
  D. PrintSample()
  C. round(4.723, 2)
  D. PrintSample()

  ---

  A valid function call invokes a function by its name, providing the required number and type of arguments in the correct syntax. According to foundational programming principles (e.g., Certiport Scripting and Programming Foundations Study Guide), function calls must follow the language's syntax rules, typically function_name(arguments).

  Option A: "function sample(float 2.0)." This is incorrect. This resembles a function definition (declaring a function named sample with a parameter), not a function call. A call would be sample(2.0).

  Option B: "GetHeight(integer 3, 4)." This is incorrect. The syntax integer 3 is invalid in most languages for a function call. A correct call might be GetHeight(3, 4), assuming GetHeight accepts two integers.

  The inclusion of type keywords (integer) is not typical in function calls.

  Option C: "round(4.723, 2)." This is correct. In languages like Python, round(4.723, 2) is a valid call to the built-in round function, which takes a float and an integer (number of decimal places) and returns a rounded value (e.g., 4.72).

  Option D: "PrintSample()." This is correct. Assuming PrintSample is a defined function with no parameters, PrintSample() is a valid call (e.g., in Python: def PrintSample(): print("Sample")).

  Certiport Scripting and Programming Foundations Study Guide (Section on Functions and Function Calls).

  Python Documentation: "Built-in Functions" (https://docs.python.org/3/library/functions.html#round).

  W3Schools: "C Functions" (https://www.w3schools.com/c/c_functions.php).

• Question 55:

  What is a feature of CM as a programming language?

  A. The code must be compiled into machine code in the form of an executable file before execution.
  B. The program usually runs slower than an interpreted language.
  C. The code runs directly one statement at a time by another program called a compiler
  D. The code does not require being translated into machine code but can be run by a separate program called a compiler.
  A. The code must be compiled into machine code in the form of an executable file before execution.

  ---

  The C(M) programming language is designed to translate mathematical constructions into efficient C programs. It is a declarative functional language with strong type checking and supports high-level functional programming. The C(M) compiler translates the C(M) program into a readable C program, which then needs to be compiled into machine code in the form of an executable file before it can be executed1. This process is typical of compiled languages, where the source code is transformed into

  machine code, which can be directly executed by the computer's CPU. In contrast, interpreted languages are typically run by an interpreter, executing one statement at a time, which generally results in slower execution compared to compiled languages.

  References: The C(M) programming language - Bulgarian Academy of Sciences.

• Question 56:

  A function should return 0 if a number, N is even and 1 if N is odd.

  What should be the input to the function?

  A. Even
  B. 1
  D. N
  D. N

  ---

  In the context of writing a function that determines whether a given number N is even or odd, the input to the function should be the number itself, represented by the variable N. The function will then perform the necessary logic to determine whether N is even or odd and return the appropriate value (0 for even, 1 for odd).

  Here's how the function might look in Python:

  Python

  def check_even_odd(N):

  """

  Determines whether a given number N is even or odd.

  Args:

  N (int): The input number.

  Returns:

  int: 0 if N is even, 1 if N is odd.

  """

  if N % 2 == 0:

  return 0 # N is even

  else:

  return 1 # N is odd

  # Example usage:

  number_to_check = 7

  result = check_even_odd(number_to_check)

  print(f"The result for {number_to_check} is: {result}") AI-generated code. Review and use carefully. More info on FAQ. In this example, if number_to_check is 7, the function will return 1 because 7 is an odd number.

  References:

  No specific external references are needed for this basic concept, as it is fundamental to programming and mathematics.

• Question 57:

  Which phase of the Waterfall approach occurs immediately after the design phase?

  A. Analysis
  B. Implementation
  C. Maintenance
  D. Requirements
  B. Implementation

  ---

  In the Waterfall model, the implementation phase follows the design phase. During implementation, developers write the program code based on the design specifications created earlier.

• Question 58:

  Which expression evaluates to 14 if integer y = 13?

  A. 11 + y % 5
  B. 11 - y / 5.0
  C. (11 + y) % 5
  D. 11.0 - y / 5
  A. 11 + y % 5

  ---

  To find an expression that evaluates to 14 when y = 13, let's evaluate each option:

  A. 11 + y % 5: The modulo operation (%) gives the remainder after division. For y = 13, 13 % 5 equals 3. Adding 11 to 3 results in 14, so this expression is correct. B. 11 - y / 5.0: Dividing 13 by 5.0 gives 2.6. Subtracting 2.6 from 11 does not yield 14, so this expression is incorrect. C. (11 + y) % 5: Adding 11 to 13 results in 24. Taking the modulo of 24 with 5 gives 4, which is not equal to 14. Therefore, this expression is incorrect. D. 11.0 - y / 5: Dividing 13 by 5 gives 2.6. Subtracting 2.6 from 11.0 does not

  yield 14, so this expression is incorrect.

  The correct expression is A. 11 + y % 5.

  References:

  Prealgebra: Simplifying and Evaluating Expressions With Integers MathPapa: Evaluating Expressions Using Algebra Calculator GeeksforGeeks: Expression Evaluation

• Question 59:

  A sample function is shown:

  

  What is returned for F (3)?

  A. 12
  B. 4
  C. -20
  D. -5
  A. 12

  ---

  Let's evaluate F(3): F(3) = (4 * 3) - 8 F(3) = 12 - 8 F(3) = 4

• Question 60:

  Which phase of a Waterfall approach defines specifics on how to build a program?

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

  ---

  The Waterfall methodology is a linear, sequential approach with phases including requirements analysis, design, implementation, testing, and maintenance. According to foundational programming principles (e.g., Certiport Scripting and Programming Foundations Study Guide), the design phase is where the specifics of how to build the program are defined, including system architecture, modules, and technical specifications.

  Waterfall Phases Overview:

  Analysis: Defines what the program should do (requirements, e.g., user needs or system goals).

  Design: Defines how the program will be built (e.g., architecture, data models, function specifications).

  Implementation: Writes the code based on the design.

  Testing: Verifies the program meets requirements.

  Option A: "Design." This is correct. The design phase produces detailed plans, such as system architecture, database schemas, and function or object specifications, outlining how the program will be constructed. For example, it might specify a function like calculateScore() or a class like User.

  Option B: "Testing." This is incorrect. Testing verifies the implemented program, not the planning of how to build it.

  Option C: "Analysis." This is incorrect. Analysis focuses on gathering requirements (what the program should do), not technical specifics of implementation.

  Option D: "Implementation." This is incorrect. Implementation involves coding the program based on the design's specifics, not defining them.

  Certiport Scripting and Programming Foundations Study Guide (Section on Waterfall Methodology).

  Sommerville, I., Software Engineering, 10th Edition (Chapter 2: Waterfall Model).

  Pressman, R.S., Software Engineering: A Practitioner's Approach, 8th Edition (Waterfall Design Phase).