Java: Chapter 2 Review Questions and Answers Graded A+

Java: Chapter 2 Review Questions and Answers Graded A+ What is the purpose of the `Scanner` class in Java? To read user input from different input sources like the keyboard. How do you declare a constant variable in Java? By using the `final` keyword before the variable declaration. What will happen if you try to divide an integer by zero in Java? It will throw an `ArithmeticException`. How do you concatenate two strings in Java? By using the `+` operator or the `concat()` method. What keyword is used to define a method in Java? The `void` or any return type followed by a method name. 2 What does the `modulus` operator (%) return? The remainder of a division operation. What is the default value of an integer variable in Java if not initialized? 0 How do you take an integer input from the user in Java? By using `Scanner` and calling `nextInt()`. What is the purpose of an `if` statement in Java? To execute a block of code only if a specified condition is true. How do you create a single-line comment in Java? By using `//` before the comment text. How do you create a multi-line comment in Java? By enclosing the comment text between `/*` and `*/`. 3 What is the output of `Sln("Java".length());`? 4 What happens if you try to store a `double` value into an `int` variable without casting? A compilation error occurs. How do you convert a `String` to an `int` in Java? By using `IInt(string)`. What is the result of `5 + 3 * 2` in Java? 11 (because multiplication has higher precedence than addition). What method is used to convert a string to uppercase in Java? `toUpperCase()` What will `Sln(10 / 3.0);` print? 3.