To understand the output of this program, let's go through each line of code:

1. int x=10, y=15; - This line declares two integer variables x and y and initializes them with the values 10 and 15, respectively.

2. x = x++; - This line is using the post-increment operator on x. The post-increment operator increments the value of x by 1 and returns the original value before the increment. However, since the assignment statement x = x++ is assigning the value of x++ back to x, the result is undefined behavior. Therefore, it is not recommended to use the post-increment operator in an assignment statement like this. The behavior of this statement is unpredictable.

3. y = ++y; - This line is using the pre-increment operator on y. The pre-increment operator increments the value of y by 1 and returns the incremented value. So, ++y will increment the value of y to 16, and then assign that value back to y.

4. printf("%d %dn",x,y); - This line prints the values of x and y.

Given the above code, the output of the program will be "11 16". Therefore, the correct answer is D) 11, 16.

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To answer this question, you need to understand the concept of access specifiers in C++.

Access specifiers in C++ are used to define the visibility and accessibility of class members (variables and functions) within a class or from outside the class. There are three access specifiers in C++: public, private, and protected.

Here is an explanation for each option:

Option A) Public - This option is a valid access specifier in C++. Public members are accessible from within the class, as well as from outside the class.

Option B) Private - This option is a valid access specifier in C++. Private members are only accessible from within the class.

Option C) Protected - This option is a valid access specifier in C++. Protected members are accessible from within the class and its derived classes.

Option D) Internal - This option is not a valid access specifier in C++. "Internal" is not an access specifier in C++. It is not used to define the visibility or accessibility of class members in C++.

The correct answer is option D) Internal. This option is not an access specifier in C++.

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To answer this question, you need to understand what STL stands for. Let's go through each option to understand why it is correct or incorrect:

Option A) Simple Template Library - This option is incorrect because the correct expansion of STL is not "Simple Template Library."

Option B) Standard Template Library - This option is correct. STL stands for Standard Template Library. The Standard Template Library is a library in C++ that provides a collection of generic algorithms, data structures, and containers.

Option C) Static Type Library - This option is incorrect because the correct expansion of STL is not "Static Type Library."

Option D) Single Type-based Library - This option is incorrect because the correct expansion of STL is not "Single Type-based Library."

The correct answer is B) Standard Template Library.

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