Help Needed On Take-Home C++ Final Exam

[dcf-joe]

I have already answered 46 out of 50 of the questions, and I just need some guidance on 4 of the questions.

Which of the following function declaration is correct?
int f(int[][] a, int rowSize, int columnSize);
int f(int a[3][], int rowSize;
int f(int a[3][], int rowSize;
int f(int a[3][], int rowSize;
int f(int a[][3], int rowSize;
int f(int a[][], int rowSize, int columnSize);

What is the correct term for numbers[99]?
index
index variable
array variable
indexed variable
array /* I believe this one is the answer */

Which of the following is incorrect? (There is more than one answer)
int a[2];
int a = new int[2]; /* I know this one is wrong because it should be int *a = ... */
int a() = new int[2]; /* This one does not even look right */
int a(2); /* This might be "incorrect," but it could be calling a function */
int a[];

Which of the following statements are true? (There is more than one answer)
Every element in an array has the same type. /* False, because I have used different types before and it works */
Array size must be declared by a constant expression. /* The book makes this statement verbatim */
The array elements are initialized when an array is created. /* Need help here */
The array size is fixed after it is created. /* Need help here */

 

[temp02]

• Which of the following function declaration is correct?
  
  int f(int a[][], int rowSize, int columnSize);​
• What is the correct term for numbers[99]?
  
  array <although the way the question was made was not the best IMHO>​
• Which of the following is incorrect? (There is more than one answer)
  
  int a[2];​
  int a[];​
• Which of the following statements are true? (There is more than one answer)
  
  Every element in an array has the same type. True <this really is true by definition, you must be thinking of a class list>​
  Array size must be declared by a constant expression. True <again like the other question above this is not the best way to ask this, depending on the context, but technically it's true>​
  The array elements are initialized when an array is created. False​
  The array size is fixed after it is created. True​

​

The answers were done based on the fact that we are talking about "true" arrays, not vectors nor dynamically allocated arrays.

Hope this helps.

 

[Kreij]

Which of the following is incorrect? (There is more than one answer)
int a[2]; Correct
int a = new int[2]; You are right, the new keyword returns a pointer
int a() = new int[2]; no
int a(2); Why would anyone delare a funtion with a constant parameter? I don't think so.
int a[]; You would have to do this with pointers and dynamic arrays ... no


Disclaimer : I could be wrong. lol

 

[dcf-joe]

Thanks ALL

 

[Kreij]

Let us know know you do on the test !!

... and, of course, come back for more help anytime.

 

[dcf-joe]

My teacher has not emailed me back with my final exam score, but I did make a B for the overall class period. Even though I very much wanted an A, I guess I did not work hard enough. But, I did learn a lot!!!

I would like to sincerely thank Kreij and temp02 for assisting me with those four questions.

 

[Kreij]

You're welcome dcf-joe, always a pleasure to help.
You know where to find us when you get stuck again.

 

[C4rnage]

The array size is fixed after it is created.

not sure about C++, but on C, you could realloc a array increasing its size. the commands were calloc and malloc, i dont remember the diference, but i think one, it will realloc and set 0.

 

[Kreij]

You are right C4r, and welcome to TPU