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NEW QUESTION # 71
What is one task that could be accomplish using a while loop?
Answer: A
Explanation:
A while loop is used to repeatedly execute a block of code as long as a specified condition is true. In the context of the given options:
* Option A could use a simple if-else statement to compare two numbers and print the larger one.
* Option B is a classic example of a use case for a while loop. The loop can run until the correct password is entered or the maximum number of attempts is reached.
* Option C could be accomplished with a single if statement to check if the number is a multiple of 10.
* Option D can also be done with an if-else statement to check the properties of the number.
Therefore, the task that is best suited for a while loop is Option B, where the user is asked to enter a password repeatedly until a correct password is entered or a certain number of incorrect attempts have been made. This requires the program to loop through the password prompt and check the conditions after each input, which is what while loops are designed for.
References:
* "Programming Foundations: Fundamentals" by Simon Allardice, Lynda.com.
* "Introduction to Computer Science and Programming Using Python," MITx on edX.
* "Python Crash Course" by Eric Matthes.
NEW QUESTION # 72
A function should determine the average of x and y. What should be the function's parameters and return value (s)?
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
A function that calculates the average of two numbers (x and y) needs to take those numbers as inputs (parameters) and return their average as the output. According to foundational programming principles (e.g., Certiport Scripting and Programming Foundations Study Guide), functions should accept necessary inputs and return computed results, avoiding unnecessary parameters or outputs.
* Option A: "Parameters: x, y, average; Return value: none." This is incorrect. Including average as a parameter is unnecessary since it is the result to be computed. A function with no return value (void in C) would not provide the average to the caller, which defeats the purpose.
* Option B: "Parameters: x, y; Return value: average." This is correct. The function needs x and y as inputs to compute (x + y) / 2. The average is returned to the caller. For example, in Python: def average (x, y): return (x + y) / 2.
* Option C: "Parameters: none; Return values: x, y." This is incorrect. Without parameters, the function cannot access x and y to compute the average. Returning x and y is irrelevant to the task.
* Option D: "Parameters: average; Return values: x, y." This is incorrect. average is the output, not an input, and returning x and y does not provide the computed average.
Certiport Scripting and Programming Foundations Study Guide (Section on Functions).
Python Documentation: "Defining Functions" (https://docs.python.org/3/tutorial/controlflow.html#defining- functions).
W3Schools: "C Functions" (https://www.w3schools.com/c/c_functions.php).
NEW QUESTION # 73
What is the Agile phase that results in a list of objects to be written?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In Agile software development, the process is iterative and focuses on delivering working software incrementally. According to foundational programming principles and Agile methodologies (e.g., Certiport Scripting and Programming Foundations Study Guide, Agile Manifesto), the design phase involves creating detailed plans for the software, including identifying objects (e.g., classes in object-oriented programming) to be implemented.
* Agile Phases Overview:
* Analysis: Defines requirements and goals (e.g., user stories, project scope).
* Design: Creates detailed plans, including system architecture, data models, and objects/classes to be written.
* Implementation: Writes and integrates code for the designed components.
* Testing: Verifies that the implemented code meets requirements.
* Option A: "Design." This is correct. During the design phase in Agile, the team translates requirements into technical specifications, often producing a list of objects (e.g., classes, modules) to be coded. For example, in an object-oriented project, the design phase identifies classes like User, Order, or Product.
* Option B: "Testing." This is incorrect. Testing verifies the implemented code, not the creation of a list of objects.
* Option C: "Implementation." This is incorrect. Implementation involves writing the code for the objects identified during the design phase.
* Option D: "Analysis." This is incorrect. Analysis focuses on gathering requirements and defining what the system should do, not specifying technical objects.
Certiport Scripting and Programming Foundations Study Guide (Section on Software Development Life Cycle: Agile).
Agile
Manifesto: "Principles of Agile Development" (http://agilemanifesto.org/).
Sommerville, I., Software Engineering, 10th Edition (Chapter 4: Agile Software Development).
NEW QUESTION # 74
A team of programmers describes the objects and functions in a program that compresses files before splitting the objects. Which Waterfall approach phases are involved?
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Describing objects (e.g., classes) and functions for a file compression program involves planning the technical structure and coding it. According to foundational programming principles, this occurs in the design phase (specifying objects and functions) and the implementation phase (writing the code).
* Waterfall Phases Analysis:
* Analysis: Defines requirements (e.g., "compress files and split them").
* Design: Specifies objects (e.g., FileCompressor class) and functions (e.g., compressFile(), splitFile()) to meet requirements.
* Implementation: Codes the described objects and functions.
* Testing: Verifies the program works as intended.
* Option A: "Analysis and implementation." This is incorrect. Analysis defines high-level requirements, not specific objects or functions, which are detailed in design.
* Option B: "Design and implementation." This is correct. Design involves describing the objects and functions (e.g., class diagrams, function signatures), and implementation involves coding them.
* Option C: "Implementation and testing." This is incorrect. Testing verifies the coded objects and functions, not their description.
* Option D: "Design and testing." This is incorrect. Testing occurs after implementation, not when describing objects and functions.
Certiport Scripting and Programming Foundations Study Guide (Section on Waterfall Methodology).
Sommerville, I., Software Engineering, 10th Edition (Chapter 2: Waterfall Design and Implementation).
Pressman, R.S., Software Engineering: A Practitioner's Approach, 8th Edition (Waterfall Phases).
NEW QUESTION # 75
What is a string?
Answer: B
Explanation:
In the context of programming, a string is traditionally understood as a sequence of characters. It can include letters, digits, symbols, and spaces, and is typically enclosed in quotation marks within the source code. For instance, "Hello, World!" is a string. Strings are used to store and manipulate text-based information, such as user input, messages, and textual data within a program. They are one of the fundamental data types in programming and are essential for building software that interacts with users or handles textual content.
References:
* Coderslang: Become a Software Engineer1
* Wikipedia2
* Programming Fundamentals3
* TechTerms4
NEW QUESTION # 76
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