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Tutor profile: Andriy M.

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Andriy M.
Computer Science Tutor at University of Michigan
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Questions

Subject: Java Programming

TutorMe
Question:

What is the relationship between a class and an interface?

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Andriy M.
Answer:

A class can implement multiple interfaces, while a class can only extend a parent class.

Subject: Calculus

TutorMe
Question:

Find the following limit: $$\lim_{x \to \infty} \frac{2^x}{x^2}$$

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Andriy M.
Answer:

We can use L'Hopital's rule to reduce the limit to a more reasonable form: $$\lim_{x \to \infty} \frac{2^x}{x^2} = \lim_{x \to \infty} \frac{2^x}{2x} $$ $$= \lim_{x \to \infty} \frac{2^x}{2} $$ $$= \infty $$

Subject: C++ Programming

TutorMe
Question:

Consider the following code: int foo = 3; int* bar = &foo; cout << bar; What output will the code produce?

Inactive
Andriy M.
Answer:

After running the code, the output should be a memory address that contains the value 3 (referred to by the variable "foo".) This is because bar is of type int pointer, and NOT of type int. So when we print bar, we are asking to print the value stored in bar, which is the address of foo.

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