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NEW QUESTION # 131
A program calculates the average miles per gallon given miles traveled and gas consumed. How should the item that holds the miles per gallon be declared?
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Miles per gallon (MPG) is calculated as miles traveled divided by gallons consumed, typically resulting in a decimal value (e.g., 25.5 MPG). According to foundational programming principles, MPG should be a variable (as it is computed and may change) and a floating-point type to handle decimals.
* Option A: "Variable float milesTraveled." This is incorrect. While miles traveled may be a float variable, the question asks for the declaration of MPG, not miles traveled.
* Option B: "Constant float milesPerGallon." This is incorrect. MPG is calculated and may vary with different inputs, so it should be a variable, not a constant (const).
* Option C: "Constant float milesTraveled." This is incorrect. The question focuses on MPG, not miles traveled, and constants are inappropriate for computed values.
* Option D: "Variable float milesPerGallon." This is correct. MPG requires a float to store decimal values (e.g., 22.7) and a variable to allow updates based on new calculations. For example, in C: float milesPerGallon = miles / gallons;.
Certiport Scripting and Programming Foundations Study Guide (Section on Variables and Data Types).
Python Documentation: "Floating Point Arithmetic" (https://docs.python.org/3/tutorial/floatingpoint.html).
W3Schools: "C Data Types" (https://www.w3schools.com/c/c_data_types.php).
NEW QUESTION # 132
Which statement describes a compiled language?
Answer: C
Explanation:
A compiled language is one where the source code is translated into machine code by a compiler. This machine code is specific to the type of machine it is compiled for, meaning the same compiled code cannot be run on different types of machines without being recompiled. This process differs from interpreted languages, where the source code is not directly converted into machine code but is instead read and executed by an interpreter, which allows for cross-platform compatibility. Compiled languages are known for their performance efficiency because the machine code is executed directly by the computer's hardware.
References: The characteristics of compiled languages are well-documented in computer science literature and online resources. For instance, GeeksforGeeks provides a clear distinction between compiled and interpreted languages, explaining that compiled languages are translated into machine instructions of the target machine1. Similarly, Stack Overflow discussions elaborate on the implementation differences between compiled and interpreted languages2. Wikipedia also defines a compiled language as one whose implementations are typically compilers3.
NEW QUESTION # 133
A software developer creates a list of all objects and functions that will be used in a board game application and then begins to write the code for each object.
Answer: C
Explanation:
The process described involves two main phases: first, the developer is designing the application by creating a list of all objects and functions (the design phase), and then they are writing the code for each object (the implementation phase). This aligns with option C, Design and Implementation. Analysis would involve understanding the requirements or problems the software will address, which is not mentioned in the scenario.
Testing is a separate phase that typically occurs after implementation to ensure the code works as intended.
NEW QUESTION # 134
A programming is developing an application that needs to manipulation text in a variety of ways. Everything the programmer needs is standard in the industry and the programmer wants to perform these manipulations with a minimal amount of code. What does the programmer need?
Answer: A
Explanation:
In the context of text manipulation, a programming library is a collection of pre-written code that provides standard functions and procedures to perform common tasks. This allows programmers to perform text manipulations with a minimal amount of code, as they can leverage the functions provided by the library instead of writing everything from scratch. Libraries often include functions for string handling, such as searching, splitting, joining, and formatting strings, which are standard requirements in many applications1234.
References:
* The explanation is based on common practices in software development where libraries are used to simplify and expedite coding tasks. For more information on text manipulation in programming and the use of libraries, you can refer to resources such as freeCodeCamp1, GeeksforGeeks2, and other reputable programming tutorials and documentation.
NEW QUESTION # 135
Which phase of a waterfall approach defines specifies on how to build a program?
Answer: A
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.
NEW QUESTION # 136
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