161.2

The amount of memory used by an array depends upon the array's data type and how many elements in the array currently have data stored in them.

F, not currently, declared.

What is the output of the following code given the function definition below? string word = "Hello"; mystery (word); cout << word; void mystery (string p) // function definition { int size = p.length (); for (int c = 0; c < size; c++) p.insert(0, "*"); } a) Hello b) *Hello c) Hello***** d) *****Hello

a

You are passing a two dimensional array, defined as below, to a function. What would be a correct function prototype? (ROWS and COLS are global constants.) int table [ROWS] [COLS]; a) float calculate (int matrix [ ] [ COLS], int rows); b) float calculate (int matrix [ROWS ] [ ], int rows); c) float calculate (matrix [ ROWS] [ COLS], int rows); d) float calculate (int matrix [ROWS ] [ ], int cols);

a

. The correct reference for the element in the third row and fifth column of a matrix called myMatrix represented by a two dimensional array is: a) myMatrix [3] [5] b) myMatrix [2] [4] c) myMatrix [2, 4] d) myMatrix [5]

b

An array can store a group of values, but the values must be a) constants. b) all the same data type. c) numeric, not characters or strings. d) declared at the time the array is created. e) none of the above.

b

If the array defined as int myArray[20][10] is being passed to a function named displayArray, along with information on the number of rows and number of columns, which of the following function calls is correct? a) displayArray(int myArray, 20, 10); b) displayArray(myArray, 20, 10); c) displayArray(myArray[20][10]); d) displayArray(myArray[ ][ ], 20, 10); e) none of the above

b

The statement int *ptr; means a) the variable called *ptr will store an asterisk and an integer value. b) ptr is a pointer variable that will store the address of an integer. c) the variable called ptr will store an integer value. d) All of the above e) None of the above

b

What are the values in the array after execution of the following code? int a[4] = {3, 7, 6, 2}; int i = 2; a[i] = i + 1; a[i + 1] = a[ i - 1]; a[1] = 5; a) 5, 3, 3, 6 b) 3, 5, 3, 7 c) 5, 7, 3, 7 d) 5, 7, 2, 1

b

What is the output of the following segment of code? int *p; p = new int; *p = 7; cout << *p; a) 0 b) 7 c) there will be an error message d) we cannot tell because we do not know what memory address will be assigned to p

b

Given the function prototype and variable declarations, which of the following is a valid function call? void compute (int, float, char&, int& ); // function prototype int x, y; //variable declarations float p, q; char r, s; a) compute (x, 7.3, 'c', y); b) compute (y, p, s, x + y); c) compute (5, p + q, r, y); d) compute (x , s, r, 8);

c

If dynamically allocated memory is not freed, a) a run-time error informs your user that the program did not free memory space. b) the source code will not link correctly. c) the system may run out of memory. d) it results in a compiler error. e) None of the above

c

What is the output of this code, given the following function definition? int x =5, y = 2; y = mixUp (x, y); cout << x; int mixUp (int &p, int t) //function definition { p = p * t; return p + 1; } a) 5 b) 6 c) 10 d) 11

c

What is the value of b after the following function call? int b = 3; mystery (b); // function call void mystery (int &val) //function definition { for (int c = 0; c < 5; c++) val += 2; } a) 2 b) 3 c) 13 d) 15

c

The type of the literal string "Hello" is best described as a) *char[]. b) *string. c) char *. d) string *. e) None of the above

c, e

. A recursive function should be designed to stop making recursive calls when it reaches its a) return statement. b) closing curly brace. c) last parameter. d) base case. e) None of the above

d

The statement cout << &num1; will output a) the value stored in the variable called num1. b) the string "&num1". c) the number 1. d) the memory address of the variable called num1. e) None of the above

d

The statement int *ptr = new int; acquires memory to hold an integer and then a) assigns an integer value to the variable called ptr. b) initializes the allocated memory to 0. c) creates a new pointer called int. d) sets ptr to point to the allocated memory. e) None of the above

d

To declare an array that will store students' last names of up to 25 characters in length, which is an appropriate statement? a) char lastName[25]; b) string lastName[25]; c) string lastName[24]; d) char lastName[26]; e) None of the above

d

What is the output of the following function call, given the function definition below? cout << tester (4); // function call int tester (int n) // function definition { if (n == 1) return 3; else return 2 * tester ( n - 1); } a) 3 b) 6 c) 12 d) 24

d

What is the value of pointer p after the following assignment? p = new char; a) 0 b) "" c) stack address d) heap address

d

What would be the result of the call doTask (5, 4), given the following definition? int doTask (int a, int b) { if (a <= 2) return 5; else return doTask(a-1, b-1) + a + b; } a) 5 b) 10 c) 17 d) 26

d

When should a parameter be a reference parameter? a) When the parameter is carrying information into the function that does not have to be returned b) When the parameter is carrying information into the function that may be changed and the new value should be returned c) When the information is to be returned from the function using the parameter. d) Both b and c

d

Which of the following is a valid assignment, given the following declarations? float *s; float *t; a) s = 50.0; b) t = 2000; c) s = s * 2; d) s = t;

d

Suppose that a recursive function with integer parameter n has a base case of 0, and for each non-base case, the function makes a recursive call with argument n+1. If the function is initially called with an actual argument of n = 3, the function call will a) return after a chain of 4 recursive calls. b) return after a chain of 2 recursive calls. c) return after a chain of 3 recursive calls. d) cause an infinite chain of recursive calls. e) None of the above

d,e

An overloaded function is one a) that has too many parameters. b) that does different things depending on who calls it. c) that attempts to do too much in a single function. d) that call other functions. e) that has the same name as another function

e

A one-dimensional array can be initialized at the time it is defined, but a two-dimensional array cannot be.

f

In C++, if you attempt to store more data in an array than it can hold, the compiler will issue an error.

f

The ampersand (&) is used to dereference a pointer variable in C++.

f

The following array definition is legal because C++ allows arrays to be implicitly sized. int grades[ ];

f

The following statement is a valid C++ array definition. double money[25.00];

f

To account for the null terminator stored at the end of each C-string, the strlen function returns the number of characters in its argument, plus one.

f

. A pointer can be passed as an argument to a function.

t

An individual array element can be processed or passed to a function just like a regular C++ variable.

t

Any algorithm that can be coded with recursion can also be coded using a loop.

t

C++ allows arrays to have more than two dimensions.

t

C++ does not perform array bounds checking.

t

C-string can be assigned to an variable whose type is the string class.

t