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WGU Scripting and Programming Foundations Exam Sample Questions (Q72-Q77):

NEW QUESTION # 72
A function should determine the average of x and y.
What should be the function's parameters and return value(s)?

A. Parameters: averageReturn values: x, y
B. Parameters: nonsReturn values: x, y
C. Parameters: x, y. averageReturn value: none
D. Parameters: x, yReturn value: average

Answer: D

Explanation:
In programming, a function that calculates the average of two numbers will require both numbers as input to perform the calculation. These inputs are known as parameters. Once the function has completed its calculation, it should return the result. In this case, the result is the average of the two numbers, which is the return value.
Here's a simple example in pseudocode:
function calculateAverage(x, y) {
average = (x + y) / 2
return average
}
In this function, x and y are the parameters, and the average is the calculated value that the function returns after execution.
References:
* Parameters and return values are fundamental concepts in programming that allow functions to receive inputs and return outputs12.
* The syntax and structure of function parameters and return values are consistent across many programming languages, ensuring that a function can perform operations using the provided inputs and then return a result2.

NEW QUESTION # 73
Which characteristic specifically describes an object-oriented language?

A. Supports creating program as item that have data plus operations
B. Requires a compiler to convert to machine code
C. Supports creating programs as a set of functions
D. Can be run on any machine that has an interpreter

Answer: A

Explanation:
Object-oriented programming (OOP) is characterized by the concept of encapsulating data and operations within objects. This characteristic is fundamental to OOP and distinguishes it from procedural programming, which is structured around functions rather than objects. In OOP, objects are instances of classes, which define the data (attributes) and the operations (methods) that can be performed on that data. This encapsulation of data and methods within objects allows for more modular, reusable, and maintainable code.
The characteristics of object-oriented programming languages are well-documented and include encapsulation, abstraction, inheritance, and polymorphism. These principles are foundational to OOP and are supported by languages like C++, Java, and Python12345.

NEW QUESTION # 74
Which three statements describe a characteristic of a programming library?

A. One library will contain one function but can have several variables.
B. A library typically must be included before any function in the library is used
C. Using libraries will always make a program run less efficiently.
D. A single library normally includes more than one function.
E. Libraries improve a programmer's productivity.
F. A single program can only include one library.

Answer: B,D,E

Explanation:
A programming library is a collection of pre-written code that developers can use to optimize tasks and improve productivity. Here's why the selected statements are correct:
* A: Libraries must be included or imported into your program before you can use the functions or objects they contain. This is because the program needs to know where to find the code it's executing12.
* B: A library typically includes multiple functions, objects, or classes that are related to a specific task or area of functionality. This allows developers to reuse code efficiently12.
* D: By providing pre-written code, libraries save developers time and effort, which in turn improves their productivity. Instead of writing code from scratch, developers can focus on the unique aspects of their project12.
The other options are incorrect because:
* C: While it's true that poorly designed libraries can affect performance, well-designed libraries can actually make programs more efficient by providing optimized code.
* E: A single program can include multiple libraries as needed. There's no limit to the number of libraries a program can use.
* F: Libraries often contain multiple functions and variables, not just one function.

NEW QUESTION # 75
Which phase of a waterfall approach defines specifies on how to build a program?

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

Answer: C

Explanation:
In the Waterfall approach to software development, the phase that defines and specifies how to build a program is the Design phase. This phase follows the initial Analysis phase, where the requirements are gathered, and precedes the Implementation phase, where the actual coding takes place. During the Design phase, the software's architecture, components, interfaces, and data are methodically planned out. This phase translates the requirements into a blueprint for constructing the software, ensuring that the final product will meet the specified needs.
References: The stages of the Waterfall methodology and their purposes are well-documented in project management and software engineering literature. Atlassian provides a comprehensive guide on the Waterfall methodology, detailing each phase and its significance1. Built In also offers insights into the Waterfall methodology, including the systematic structure it provides for planning, organization, design, and testing2.
These sources affirm the role of the Design phase in the Waterfall approach as the stage where the program's construction is defined.

NEW QUESTION # 76
The steps in an algorithm to calculate the positive difference in two given values, x and y, are given in no particular order:

What is the first step of the algorithm?

A. Set Diff = x - y
B. Deduce variable Diff
C. If y > x, set Diff = y - x.
D. Put Diff to output

Answer: B

Explanation:
The first step in the algorithm to calculate the positive difference between two given values, x and y, is to declare the variable Diff. This is essential as it initializes the variable that will be used to store the calculated difference between x and y. The subsequent steps involve conditional statements and arithmetic operations that utilize this declared variable to compute and store the positive difference. References: N/A (as per image provided) The image shows steps of an algorithm listed in no particular order for calculating the positive difference between two values, making it relevant for understanding or teaching algorithmic logic and sequence.

NEW QUESTION # 77
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