To answer this question, you need to understand that reserved words in programming languages are words that are reserved for specific purposes and cannot be used as identifiers (such as variable names or function names). In Java, there are several reserved words.

Let's go through each option to understand why it is correct or incorrect:

Option A) method - This option is incorrect because "method" is not a reserved word in the Java programming language. It is a term used to describe a function or procedure that is associated with an object or class.

Option B) native - This option is correct because "native" is a reserved word in the Java programming language. It is used to indicate that a method is implemented in a language other than Java, such as C or C++.

Option C) subclasses - This option is incorrect because "subclasses" is not a reserved word in the Java programming language. It is a term used to describe classes that inherit properties and methods from a superclass.

Option D) reference - This option is incorrect because "reference" is not a reserved word in the Java programming language. It is a term used to describe a variable that holds the memory address of an object.

The correct answer is B) native. This option is correct because "native" is a reserved word in the Java programming language.

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• Wrong explanation

To answer this question, we need to understand what a keyword is in the context of Java programming.

In Java, keywords are reserved words that have predefined meanings and cannot be used as identifiers (such as variable names or class names). These keywords are used to define the syntax and structure of the Java programming language.

Let's go through each option to understand which one is a valid keyword in Java:

Option A) interface - This option is correct. "interface" is a valid keyword in Java and is used to define a collection of abstract methods that can be implemented by a class.

Option B) string - This option is incorrect. "string" is not a valid keyword in Java. However, "String" (with an uppercase "S") is a valid keyword and is used to represent a sequence of characters.

Option C) Float - This option is incorrect. "Float" is not a valid keyword in Java. However, "float" (with a lowercase "f") is a valid keyword and is used to represent floating-point numbers.

Option D) unsigned - This option is incorrect. "unsigned" is not a valid keyword in Java.

Based on the explanations above, the correct answer is Option A) interface.

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• Wrong explanation

To answer this question, you need to know that a collective noun is a word used to describe a group of people, animals, or things.

Let's go through each option to understand why it is correct or incorrect:

Option A) band - This option is incorrect because "band" is commonly used to describe a group of musicians, not lions. Option B) mischief - This option is incorrect because "mischief" is commonly used to describe a group of playful or mischievous individuals, such as a group of raccoons, not lions. Option C) leap - This option is incorrect because "leap" is commonly used to describe a group of leopards, not lions. Option D) pride - This option is correct because "pride" is the collective noun used to describe a group of lions.

The correct answer is D) pride. This option is correct because "pride" is the commonly accepted collective noun for lions.

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• Wrong explanation