Deck 7: Arrays

Question 1

Write the declaration for a function named funct1 that expects an array of floats, the number of elements in the array and does not return any value.

Answer 1

void funct1float myArray[], int numElements);

Question 2

The following array declaration is legal
double scores[]={0.1,0.2,0.3};

Answer 2

True

Question 3

The modifier that guarantees that an array argument will not be changed is called ______.

Answer 3

const

Question 4

If your index used to access the indexed variables of the array has the value of a non-existent index, this is called _________

Question 5

How many indexed variables does the following array have?
int myArray[12]={1,2,3,6,5,4,7,1,2};

Question 6

The following function declaration guarantees the values in the array argument are not changed.
void function1int array[], int numElements);

Question 7

If you use the const modifier in a function declaration, you do not include it in the function definition.

Question 8

Write the code to declare a two dimension array of integers with 10 rows and 20 columns.

Question 9

The locations of the various indexed variables in an array can be spread out all over the memory.

Question 10

Write the code to declare an array of 10 doubles named list;

Question 11

How many indexed variables does the following array have?
int myArray[]={1,2,3,6,5,4,7,1,2};

Question 12

Arrays can be passed to functions.

Question 13

If you put a value in the square brackets of a one-dimension array parameter, this value is _________ by the compiler.

Question 14

The computer remembers the address of which indexed variables) in an array? ______

Question 15

A computer's memory consists of numbered locations called __________.

Question 16

Arrays can be returned from a function.

Question 17

If a function is expecting a pass by reference parameter, you can pass an index variable from an array of the same base type to that function.

Question 18

The following function will work with any size integer array.
void function1int array[], int numElements);

Question 19

The indexed variables members) of an array must be integers.

Question 20

When you have a function that expects an array, it should also expect the size of the array or the number of indexed variables with valid data.

Question 21

What is wrong with the following code fragment?
Const int SIZE =5;
Float scores[SIZE];
Forint i=0; i<=SIZE;i++)
{
Cout << "Enter a score\n";
Cin >> scores[i];
}

A) Array indexes start at 1 not 0
B) Arrays must be integers
C) Array indexes must be less than the size of the array
D) Should be cin >> scores[0];

Question 22

What are the valid indexes for the array shown below?
Int myArray[25];

A) 0-25
B) 0-24
C) 1-25
D) 1-24

Question 23

Given the following function definition, will repeated calls to the search function for the same target find all occurrences of that target in the array?
Int searchconst int array[], int target, int numElements)
{
Int index=0;
Bool found=false;
While!found) && index < numElements))
{
Ifarray[index] == target)
Found=true;
Else
Index++;
}
Iffound==true)
Return index;
Else
Return -1;
}

A) Yes
B) No
C) Impossible to tell without looking at the values of the array
D) It depends on the value of target.

Question 24

If we want a search function to search an array for some value and return either the index where the value was found, or -1 if not found, which of the following prototypes would be appropriate?

A) void searchconst int array, int target, int numElements);
B) void searchconst int array, int target);
C) int searchconst int array[], int numElements);
D) int searchconst int array[], int target, int numElements);

Question 25

In the expression
double score[10];
double is called the ___________ of the array

Question 26

Given an array of integers of size 5, how does the computer know where the 3^rd indexed variable is located?

A) It adds 3 to the base address of the array
B) It adds space for 3 integers to the base address of the array
C) It remembers where all the indexed variables of the array are located.
D) None of the above

Question 27

Given the following function definition for a search function, and the following variable declarations, which of the following are appropriate function invocations?
Const int SIZE=1000;
Int searchconst int array[], int target, int numElements);
Int array[SIZE], target, numberOfElements;

A) searcharray[0], target, numberOfElements);
B) result=searcharray[0], target, numberOfElements);
C) result=searcharray, target, numberOfElements);
D) result=searcharray, target, SIZE);

Question 28

In the expression
cout << score[i] << endl;
i is called the

Question 29

An _______ is used to process a collection of data all of which is the same type

Question 30

Given the following function definition, what modifications need to be made to the search function so that it finds all occurrences of target in the array?
Int searchconst int array[], int target, int numElements)
{
Int index=0;
Bool found=false;
While!found) && index < numElements))
{
Ifarray[index] == target)
Found=true;
Else
Index++;
}
Iffound==true)
Return index;
Else
Return -1;
}

A) Add another parameter to indicate where to stop searching
B) Add another parameter to indicate where to start searching
C) This already can find all occurrences of a given target
D) Have the function return the whole array

Question 31

Which of the following function declarations correctly guarantee that the function will not change any values in the array argument?

A) void f1int array[], int size) const;
B) void f1int array[], int size);
C) void f1int &array, int size);
D) void f1const int array[], int size);
E) void f1int array[], const int size);

Question 32

Given an array named scores with 25 elements, what is the correct way to access the 25^th element?

A) scores+25
B) scores[24]
C) scores[25]
D) scores[last]

Question 33

Arrays are always passed to a function using

A) pass by value
B) pass by reference
C) pass by array
D) you cannot pass arrays to a function

Question 34

Indexes are numbered starting at _________

Question 35

Which of the following function declarations could be used to input data from the keyboard into the array?

A) void inputint array[], int &numElements, int MAX_SIZE);
B) void inputint array[], int numElements, int MAX_SIZE);
C) void inputint &array[], int numElements, int MAX_SIZE);
D) int array[] inputint array[], int &numElements, int MAX_SIZE);

Question 36

Which sort algorithm does the following outline define?
For i between 0 and number_used-1 inclusive
Put the ith smallest element at array[i]

A) sequential
B) selection
C) bubble
D) swap

Question 37

The individual variables that comprise an array are called __________

Question 38

What is wrong with the following code?
Float scores[10], total;

A) Cannot declare regular and array variables together.
B) Arrays must be integers
C) The 10 should be replaced with a variable name, whose value is input from the user
D) Nothing.

Question 39

Why should you use a named constant for the size of an array?

A) Readability of code
B) Makes changes to the program easier
C) Helps reduce logic errors
D) All of the above

Question 40

If you declare and initialize an integer array of size 10, but only list 5 values, what values are stored in the remaining 5 indexed variables?

A) 0
B) garbage
C) 0.0
D) '0'

Question 41

If you need a function that will handle multi-dimensional arrays, you must specify the following sizes inside the square brackets.

A) All the sizes
B) All sizes except the last dimension
C) All sizes except the first dimension
D) None of the sizes

Question 42

Which of the following correctly uses C++11's range-based for statement to iterate through every element of the array variable arr?

A) for auto x : arr)
B) foreach x in arr)
C) for auto x; x < arr.length; x++)
D) for x in arr

Question 43

Which of the following will correctly assign all the values in one array to the other array? Assume both arrays are of the same type and have SIZE elements)

A) array1=array2;
B) array1[]=array2;
C) fori=0;iD) fori=0;i

Question 44

What is the output of this code?
Int arr[] = { 1, 2, 3};
For int &element : arr)
Element+=10;
For int element : arr)
Cout << element << endl;

A) 1 2 3
B) 11 12 13

Question 45

Which of the following will read values from the keyboard into the array? Assume the size of the array is SIZE).

A) cin >> array;
B) cin >> array[];
C) cin >> array[SIZE];
D) fori=0;i> array[i];

Question 46

Which of the following function declarations will accept the following two-dimension array?
Int pages[10][30];

A) void f1int pages[][], int size);
B) void f1int pages[][30], int size);
C) void f1int pages[10][], int size);
D) void f1int& pages, int size);

Question 47

What is the output of this code?
Int arr[] = { 1, 2, 3};
For int element : arr)
Element+=10;
For int element : arr)
Cout << element << endl;

A) 1 2 3
B) 11 12 13

Question 48

Which of the following correctly declare an array that can hold up to 3 rows of 5 columns of doubles?

A) int array[3],[5];
B) int array[3][5];
C) float array[3][5];
D) float array[3,5];