CS161 Exam – 14 questions – instant Delivery – Perfect Solution

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Problem Statement

1. The output of the following code will be 3.

int num1 = 1;

int* num2 = &num1; int& num3 = *num2; num1 = 3;
std::cout << num3 << std::endl; • True • False 2. If we have a program with a variable bob of type pointer-to-Employee, what is the following line equivalent to? fn = bob->firstName;

• fn = *(bob).firstName;

• fn = *(bob.firstName);

• fn = (*bob).firstName;

• fn = (*bob.firstName);

3. The following code will print the number 7.
int num = 4; int* val = # num = 7;
std::cout << val << std::endl;  True  False 4. The name of an array acts as a pointer to the first element in the array. • True • False 5. A pointer is a variable that can store a memory address as its value. • True • False 6. What would the result of the following code be? int nums[4] = {1,2,3,4}; nums[2] = 7; std::cout<< *nums << std::endl; • It will print 1. • It will print a syntax error message. • It will print garbage, because we are accessing memory we didn't allocate. • It will print [1, 2, 7, 4]. Question 7 7. Pass by reference makes a copy of the value that is being passed and stores it in the corresponding parameter of the function. • True • False 8. You indicate that a function does not return a value by… o putting a “&” in front of the function name. o giving it a return type of “void”. o leaving out the return type. o giving a reference type as tthe return type. 9. Each class may have any number of constructors, but at most one destructor. • True • False 10. A class can contain variables of other class types. True False 11. In C++ a single array may store different data types. o True o False 12. What is the output of the following code? int nums[] = {1,2,3,4}; nums[2] = 7; for (int i=0; i<4; i++) std::cout << nums[i] << " "; std::cout << std::endl; • 1 7 3 4 • 1 2 7 4 • 1 7 2 4 • 1 3 7 4 13. What string will the following code output? string str = “infinite indigo origami”; string output = “”; int counter = 1; while (str.at(counter) != ‘i’) { output += str.at(counter); counter += 3; } std::cout << output << std::endl; OUTPUT: nnengog 14. Assume there is a class called Cat, which has a string field called name, and a get method called getName. If you have an array of pointers to Cat objects, how would you get the name of the third Cat? • catArray[2].getName() • *catArray[2].getName() • catArray[2]->getName()

• catArray[getName(2)]

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