Exam 3 Fundamentals of Programming

1. Given the function definition

   void Twist (int a, int& b)
   {  int c;
     c = a + 2;
     a = a * 3;
     b = c + a;
   }
   
   What is the output of the following code fragment that invokes Twist?  
   
     int r = 1;
     int s = 2;
     int t = 3;
     Twist (t, s);
     cout << r << ' ' << s <<  ' ' << t << endl;
   

   1 14 3
   1 10 3
   5 14 3
   1 14 9
   
   
2. Given the function definition

   void DoThis (int& alpha, int beta)
   {  int temp;
      alpha = alpha + 100;
      temp = beta;
      beta = 999;
   }
   What is the output of the following code fragment that invokes DoThis?  
     int gamma = 10;
     int delta = 20;
     DoThis (gamma, delta);
     cout << gamma << ' ' << delta << ' ' << endl;
   

   gamma = 10 and delta = 20
   gamma = 110 and delta = 20
   gamma =10 and delta = 999
   gamma = 110 and delta = 999
   
   
3. Given the function prototype:

         void Fix (int&, double);
     Which of the following is an appropriate function call when someInt and someDouble are delcared?
         int someInt = 0;
         double someDouble = 0.0; 
         

   Fix (24, 6.85);
   someDouble = 0.3 * Fix(someInt, 6.85);
   Fix (someInt + 5, someDouble);
   Fix (someInt, someDouble);
   
   
4. Which of the following is the correct function heading for a parameterless function named PrintStars?
   void PrintStars
   void PrintStars;
   void PrintStars()
   void PrintStars();
   
   
5. Given the function heading:

   void GetNums (int howMany, float& alpha, float& beta)
   
   Which of the following is a valid function prototype for GetNums?
   

   void GetNums (int howMany, float& alpha, float beta);
   void GetNums (int, float&, float &);
   int GetNums (int, float&, float&);
   int GetNums(int howMany, float& alpha, float& beta);
   
   
6. The function someFunc() should have two formal parameters of type int named alpha and beta. The parameter for alpha should be pass-by-value and the parameter for beta should be pass-by-reference. What is the most appropriate function heading for someFunc()?
   void SomeFunc (int alpha, int beta)
   void SomeFunc (int& alpha, int beta)
   void SomeFunc (int alpha, int& beta)
   void SomeFunc (int& alpha, int& beta)
   
   
7. If a C++ function does not use parameters, you still must put parentheses around the empty parameter list.
   True
   False
   
   
8. Given:
   string name1 = "Aaron", name2 = "Aardvark", name3;
   What is the output of the following code segment?

   if (name1 > name2)
     {name3 = name1;
      name1 = name2;
      name2 = name3;
     }
   cout << "The first name on the list is " << name1 << endl;
   

   Aaron
   Aardvark
   
   
9. In C++, an array can be passed as a parameter either by value or by reference.
   True
   False
   
   
10. Given the declaration
    int beta [20];
    the expression beta [3] accesses the third component of the array.
    True
    False
    
    
11. C++ does not check for out-of-bounds array indices while a program is running.
    True
    False
    
    
12. An individual array component can be passed as a parameter to a function.
    True
    False
    
    
13. What is the output of the following program fragment?
    int alpha[5] = {100, 200, 300, 400, 500};
    int i;
    for (i = 4; i > 0; i--)
       cout << alpha[i] << ' '; cout << endl;
    400 300 200 100
    500 400 300 200 100
    500 400 300 200
    4 3 2 1
    
    
14. In C++, an array is passed by default as a value parameter.
    True
    False
    
    
15. Given the declarations
    int status [10];
    int i;
    Which of the following loops correctly zeros out the status array?
    
    for (i = 0; i <= 10; i++) status[i] = 0;
    for (i = 0; i < 10; i++) status[i] = 0;
    for (i = 1; i <= 10; i++) status[i] = 0;
    for (i = 1; i < 10; i++) status[i] = 0;
    
    
16. Given the declaration
    int beta [20];
    the statement
    beta = beta + 1;
    adds 1 to all 20 elements of the array.
    
    True
    False
    
    
17. Given:
    char myString[] = "Adios";
    the C++ compiler allocates an array of 5 elements.
    True
    False
    
    
18. The following are valid C++ statements:
    int num[3];
    num = {0, 0, 0};
    True
    False
    
    
19. In C++, the subscript of a one-dimensional array must be of type integer.
    True
    False
    
    
20. In a C++ program, 't' is contained in memory as a single character, whereas "t" is contained in memory as two characters.
    True
    False
    
    

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