To find the value of the expression (1/2 + 3/2 + 0.1), we need to perform the addition operation.

Let's simplify the expression step by step:

1/2 + 3/2 + 0.1

Both 1/2 and 3/2 have the same denominator, so we can add the numerators and keep the denominator the same:

(1 + 3) / 2 + 0.1

4/2 + 0.1

Now, let's simplify the fraction 4/2:

4/2 = 2

So, the expression becomes:

2 + 0.1

Adding 2 and 0.1:

2 + 0.1 = 2.1

Therefore, the value of the expression (1/2 + 3/2 + 0.1) is 2.1.

The correct answer is option B) 1.1.

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• Wrong explanation

To answer this question, you need to understand the syntax for declaring methods in a programming language. Let's go through each option to understand why it is correct or incorrect:

Option A) void method1 { /* ... */ } - This option is incorrect because it is missing the parentheses after the method name. The correct syntax for declaring a method includes the parentheses to enclose any parameters that the method may take.

Option B) void method2() { /* ... */ } - This option is correct because it follows the correct syntax for declaring a method. The method name is "method2" and it does not take any parameters, as indicated by the empty parentheses. The return type of the method is "void", indicating that the method does not return a value.

Option C) void method3(void) { /* ... */ } - This option is incorrect because it includes the keyword "void" as a parameter. In most programming languages, the "void" keyword is used only as the return type to indicate that the method does not return a value. It should not be used as a parameter.

Option D) method4() { /* ... */ } - This option is incorrect because it does not specify a return type for the method. In most programming languages, you need to specify the return type of a method, even if it is "void" to indicate that the method does not return a value.

The correct answer is B) void method2() { /* ... */ }. This option is correct because it follows the correct syntax for declaring a method and does not have any errors or missing components.

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• Wrong explanation

To answer this question, you need to understand the concept of class modifiers in Java.

Option A) abstract class Link { } - This option is incorrect because an abstract class can be extended by other classes.

Option B) native class Link { } - This option is incorrect because the "native" keyword is used to indicate that a method is implemented in a language other than Java, and it is not used to define a class that cannot be extended.

Option C) final class Link { } - This option is correct because the "final" keyword is used to indicate that a class cannot be extended. Therefore, this class cannot have any subclasses.

Option D) abstract final class Link { } - This option is incorrect because the "abstract" and "final" keywords are contradictory. An abstract class is meant to be extended, while a final class cannot be extended. It is not possible to have a class that is both abstract and final.

The correct answer is C) final class Link { }. This option is correct because the "final" keyword ensures that the class cannot be extended.

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• Wrong explanation