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COP 3014 Final Exam Questions and Answers
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COP 3014 Final Exam Questions and Answers
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COP 3014 Final Exam Questions andAnswers
What operator returns the memory address of the variable? - Answer-address operator
(&)
char = 1 byte
int = 4 bytes
doubles = 8 bytes
int x = 25;
cout << &x << end; //outputs 0x8f05
How are array names used as pointers? - Answer-array names are pointers, to the first
element in the array
What are local and global variables? - Answer-Global variables are defined outside of
the main
local variables are defined in functions
What statement causes a function to end? - Answer-return 0;
What does a pointer store? - Answer-memory addresses
What is the difference in statements:
cout << ptr << endl;
cout << *ptr << endl; - Answer-ptr prints address
*ptr prints value (dereferenced)
How do ++ and -- affect pointers? - Answer-add or subtract bytes
char = 1 byte
int = 4 bytes
doubles = 8 bytes
What operations can be used on pointers? - Answer-arithmetic operations
How do you dynamically allocate memory? - Answer-use the new function
How do you declare pointers and allocate memory to them? - Answer-int *iptr = nullptr;
iptr = new int; //requests computer to allocate enough memory for a new int variable.
, iptr contains the address of the newly allocated memory
use *iptr to assign values to dynamically allocated space
What is the null termination character for character strings? - Answer-\0
Pass parameters by reference vs by value? - Answer-reference (ref) changes value
value is a copy
Type of data returned from functions? - Answer-based on void, int, or double function
declaration
How many characters can be stored in the array: char array[1000]? - Answer-999,
because of null character \0
How do you define character arrays? - Answer-char greeting[6] = {'H', 'e', 'l', 'l', 'o', '\0'}
=
char greeting[] = "Hello";
What do isupper and toupper do? - Answer-isupper checks if character is uppercase
letter
toupper converts lowercase letter to uppercase
How to declare a 2D array? - Answer-char myarray[1000] [1000];
Pass as parameter in prototype:
void checkarray(int a[ ][4]);
What do atoi and itoa do? - Answer-atoi converts string to integer
itoa converts integer to string (non-standard function)
How do you calculate the size of a character array? - Answer-Add 1 to array size to
include null character \0
How do you declare a file pointer? - Answer->> outputs to
<< receives from
How do you open a file? - Answer-ifstream datafile ("input.txt");
or
ifstream datafile;
datafile.open(filename);
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