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WGU Scripting and Programming Foundations Exam 認定 Scripting-and-Programming-Foundations 試験問題 (Q104-Q109):
質問 # 104
Which characteristic distinguishes a markup language from other languages
- A. It does not perform complex algorithms, but instead describes the content and formatting of webpages and other documents.
- B. It allows variables to change type during execution
- C. It requires fewer variables and variable conversions than other languages because the types can change during execution
- D. It supports decomposing programs into custom types that often combine with other variable types into more complicated concepts.
正解:A
解説:
Markup languages, such as HTML, XML, and SGML, are distinct from programming languages in that they are used for structuring, formatting, and defining the presentation of content within documents. They utilize tags to denote how elements should be displayed, but do not contain logic or algorithms to perform computations or process data123. Instead, markup languages are concerned with the layout and organization of text and images, making them more descriptive and less about executing tasks4.
References:
* GeeksforGeeks' explanation of different markup languages1.
* Semrush's definition and examples of markup languages2.
* An article on Medium about how markup languages differ from compiled languages4.
* GeeksforGeeks' comparison between programming, scripting, and markup languages3.
質問 # 105
Which kind of languages are C and Java?
- A. Machine code
- B. Interpreted
- C. Markup
- D. Compiled
正解:D
解説:
Comprehensive and Detailed Explanation From Exact Extract:
C and Java are both compiled languages, though they differ in their compilation process. According to foundational programming principles, C is compiled directly to machine code, while Java is compiled to bytecode, which is executed by the Java Virtual Machine (JVM).
* Option A: "Machine code." This is incorrect. Machine code is the low-level output of a compiler, not a programming language. C and Java are high-level languages.
* Option B: "Compiled." This is correct. C is compiled to machine code (e.g., .exe files), and Java is compiled to bytecode (.class files), which is then executed by the JVM. Both require a compilation step before execution.
* Option C: "Interpreted." This is incorrect. Neither C nor Java is interpreted. While Java's bytecode is executed by the JVM, the compilation to bytecode distinguishes it from interpreted languages like Python, which execute source code directly.
* Option D: "Markup." This is incorrect. Markup languages (e.g., HTML) are used for structuring content, not programming. C and Java are programming languages.
Certiport Scripting and Programming Foundations Study Guide (Section on Compiled Languages).
Java Documentation: "The Java Compiler" (https://docs.oracle.com/javase/8/docs/technotes/tools/windows
/javac.html).
W3Schools: "C Introduction" (https://www.w3schools.com/c/c_intro.php).
質問 # 106
Which data type should be used to hold the value of a person's body temperature in Fahrenheit
- A. Float
- B. Integer
- C. Boolean
- D. String
正解:A
解説:
When dealing with body temperature, especially in Fahrenheit, the appropriate data type to use is a floating-point number (float). Here's why:
* Measurement Precision:
* Body temperature can have decimal values, such as 98.6°F.
* Integer data types (like B. Integer) cannot represent fractional values.
* Floats allow for greater precision and can handle decimal places.
* Temperature Scales:
* Fahrenheit is a continuous scale, not a discrete set of values.
* It includes both positive and negative values (e.g., sub-zero temperatures).
* Floats accommodate this range effectively.
* Examples:
* A person's body temperature might be 98.6°F (normal) or 101.3°F (fever).
* These values require a data type that can handle fractions.
* References:
* The normal body temperature varies across different measurement sites (e.g., rectal, tympanic, oral, axillary) but falls within a range. For example:
* Rectal: 36.32-37.76°C (97.38-99.97°F)
* Tympanic: 35.76-37.52°C (96.37-99.54°F)
* Axillary: 35.01-36.93°C (95.02-98.47°F)1
* Using a float allows us to represent these variations accurately.
Remember that using a float ensures flexibility and precision when dealing with temperature measurements.
Therefore, the correct answer is D. Float.
質問 # 107
Which two statement describe advantages to using programming libraries? Choose 2 answers
- A. Using a library minimizes copyright issues in coding.
- B. A program that uses libraries is more portable than one that does not
- C. Libraries always make code run faster.
- D. The programmer can improve productivity by using libraries.
- E. Using a library prevents a programmer from having to code common tasks by hand
- F. Using libraries turns procedural code into object-oriented code.
正解:D、E
解説:
Programming libraries offer a collection of pre-written code that developers can use to perform common tasks, which saves time and effort. This is because:
* B. Libraries provide pre-coded functions and procedures, which means programmers don't need to write code from scratch for tasks that are common across many programs. This reuse of code enhances efficiency and reduces the potential for errors in coding those tasks.
* E. By using libraries, programmers can significantly improve their productivity. Since they are not spending time writing and testing code for tasks that the library already provides, they can focus on the unique aspects of their own projects.
References:
* The benefits of using programming libraries are well-documented in software development literature.
For instance, "Code Complete" by Steve McConnell discusses how libraries can improve programmer productivity. Additionally, "The Pragmatic Programmer" by Andrew Hunt and David Thomas emphasizes the importance of reusing code to increase efficiency and reduce errors.
質問 # 108
Which two operators can be used for checking divisibility of a number?
Choose 2 answers.
- A. %
- B. /
- C. $
- D. *
- E. +
- F.
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