Java code - Study guides, Class notes & Summaries

AP Computer Science A Questions and Answers 100% Pass Consider the following code segment: ```java int[] numbers = {1, 2, 3, 4, 5}; int sum = 0; for (int i = 0; i < h; i++) { sum += numbers[i]; } ``` What does the code segment do? The code segment calculates the sum of all the elements in the `numbers` array and stores the result in the `sum` variable. The final value of `sum` will be 15. Consider the following code segment: ```java String str = "hello"; 2 st...

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What is the purpose of an object's instance variables? CORRECT ANSWER To store the data for a single instance of a class. Suppose you want to work with objects of the Student class. What do you need to know? CORRECT ANSWER The public interface of the class. T/F: S is an object CORRECT ANSWER True T/F: String is an object CORRECT ANSWER False T/F: Suppose that a new version of Java is released, and that the Java compiler changes the way that string objects store characters. If the st...

AP Computer Science - Chapter 2 Review Questions with Verified Solutions Which of the following data types is used to store a single character in Java? A) `String` B) `int` C) `char` D) `boolean` Answer: C) char What will be the result of the following code snippet? ```java int a = 10; int b = 3; int result = a / b; 2 Sln(result); ``` A) `3.33` B) `3` C) `10` D) `0` Answer: B) 3 How do you declare an `ArrayList` of `Integer` objects in Java? A) `A...

AP Computer Science A Unit 2 Progress Check: MCQ Part A 100% Pass What will be the output of the following code? ```java int x = 5; int y = 10; Sln(x + y); ``` A) 15 B) 510 C) 5 D) 10 Answer: A) 15 Given the following code snippet, what is the value of `result` after execution? 2 ```java int a = 8; int b = 3; int result = a % b; ``` A) 2 B) 1 C) 3 D) 5 Answer: A) 2 Which of the following statements correctly initializes an `ArrayList` of `String` ...

KEY JAVA ( CODE ) EXAM WITH COMPLETE QUESTIONS AND ANSWERS...

Which of the following lines is a properly formatted comment? a. // This is a comment b. /* This is a comment */ c. /* this is a comment */ d. both a and b e. a, b and c - Answer-e. a, b and c The Java compiler translates Java source code into _____________ . a. assembly code b. C++ c. Java bytecode d. an object-oriented language e. machine code - Answer-c. Java bytecodeClasses can be created from other classes by using _______________ . a. machine code b. attributes ...

AP Computer Science Multiple Choice with Complete Solutions What will be the output of the following code snippet if `x = 7` and `y = 3`? ```java int result = x / y; Sln(result); ``` `2` - `2.0` - `3` - `2.333` Which of the following statements is used to create a new instance of a class in Java? - `ClassName obj = new ClassName();` - `ClassName obj = ClassName();` 2 - `ClassName obj = new ClassName;` - `new ClassName obj = new ClassName();` `ClassName ob...

Solution Manual For Data Structures and Algorithms in Java, 6th Edition by Goodrich, Tamassia & Goldwasser, ISBN: 9781118771334, All 15 Chapters Covered, Verified Latest Edition Solution Manual For Data Structures and Algorithms in Java, 6th Edition by Goodrich, Tamassia & Goldwasser, ISBN: 9781118771334, All 15 Chapters Covered, Verified Latest Edition Solution Manual For Data Structures and Algorithms in Java, 6th Edition by Goodrich, Tamassia & Goldwasser, ISBN: 9781118771334, All 15 Chapte...