📚 Topic Summary
JavaScript is a versatile scripting language crucial for web development. Multiple choice questions (MCQs) test your understanding of JavaScript syntax, data types, control structures, functions, and the Document Object Model (DOM). Preparing for these questions helps solidify your grasp on fundamental concepts and problem-solving skills needed for AP Computer Science Principles.
🧠 Part A: Vocabulary
Match the terms with their correct definitions:
| Term |
Definition |
| 1. Variable |
A. A named storage location that can hold a value. |
| 2. Function |
B. A block of code designed to perform a specific task. |
| 3. Conditional Statement |
C. A statement that executes a block of code only if a specified condition is true. |
| 4. Loop |
D. A sequence of instructions that is repeated until a certain condition is reached. |
| 5. DOM |
E. A programming interface for HTML and XML documents, representing the page structure. |
(Answers: 1-A, 2-B, 3-C, 4-D, 5-E)
📝 Part B: Fill in the Blanks
Complete the following paragraph using the words provided: (array, string, boolean, number, object)
In JavaScript, a(n) __________ is a data type that represents a sequence of characters. A(n) __________ is a data type that represents true or false values. A(n) __________ is a data type that represents numerical values. A(n) __________ is a collection of elements, each identified by an index. Finally, a(n) __________ is a collection of key-value pairs.
(Answers: string, boolean, number, array, object)
💡 Part C: Critical Thinking
Explain how understanding the DOM (Document Object Model) is important for creating interactive web pages using JavaScript. Provide an example of how you would use JavaScript to manipulate the content of a webpage.