Csci 1260 Quiz 3

Front 1

How many values are normal variables designed to hold?

Back 1

Only one, as opposed to arrays, which can hold multiple values.

Front 2

How many types can a single array hold?

Back 2

Only one type (but can have many instances of those types)

Front 3

Arrays are ______, (the positions are numbered) starting with ____.

Back 3

Indexed

0

Front 4

An array can be thought of as a collection, list, or table of ____________.

Back 4

Data Elements

Front 5

An array is an _________, so it needs an _______ reference.

Back 5

object

Front 6

What would be the declaration of an array that holds 5 integers?

Back 6

int [ ] numbers = new int [5];

Front 7

Integer arrays are always initialized to ____

Back 7

0

Front 8

We may declare an _____________ and create a __________ in the same statement.

Back 8

array reference

New array instance

Front 9

Arrays may be made of ______ types and _________ types.

Back 9

Value & Reference

Front 10

The array size must be a _________

Back 10

Positive Integer

Front 11

Array sizes can be a __________ value, a ________, or __________.

Back 11

Literal, Constant, Variable

Front 12

Using a ____________ is preferred because the array size may be used in many places in the code and this way provides for easy changes

Back 12

Named Constant

Front 13

Once an array is created, can its size be altered?

Back 13

No

Front 14

In the list: numbers[0], numbers[1], numbers[2], numbers[3], numbers[4], numbers[5] what does each item represent?

Back 14

The reference names of the array

Front 15

An array is accessed by the ___________ and a __________ or ______________ that identifies which element in the array to access.

Back 15

reference name, subscript, index

Front 16

Array elements ___________________________ as any other variables

Back 16

be used as

Front 17

How are array elements accessed?

Back 17

array name & subscript

Front 18

If keyboard is your Scanner object and you want to store input into hours[0]. How would you do this?

Back 18

hours[0] = keyboard.nextInt();

Front 19

Array __________ always start at ____ and continue through (__________).

Back 19

indexes, zero, (array length - 1)

Front 20

If an some variable tries to be a reference for an array item that does not exist, what kind of error is thrown? (For example, if you try to put some data into arrayObjects[max + 1])

Back 20

ArrayIndexOutOfBoundsException

Front 21

An initialization list can be used to initialize the array when ___________

Back 21

There are relatively few items to be initialized.

Front 22

Size of the array is determined by _____________________, not necessarily the _______________that the spaces hold.

Back 22

the number of spaces that exist, value

Front 23

Sometimes using an advanced for loop is not preferable, what is a poignant example of this encountered in class?

Back 23

When you need to reference the index (or whatever your counter is) for use in the loop. Such as if you need to use the same index for two or more arrays like Month and date)

Front 24

In addition to initializing an array by setting all the values, one may assign an _____________ to the ______________________.

Back 24

existing array object, new array reference

Front 25

If Face is an enumerated type listing all faces in a playing card, how could you create an array of Faces named myFaces and initialize it with all the possible faces using the values method which is present in all enumerated types?

Back 25

Face[ ] myFaces = Face.values( );

Front 26

ALTERNATE ARRAY DECLARATION: what is an alternate position for the brackets that is different from: int [ ] numbers; ? How about for numbers and codes?

Back 26

int numbers [ ]; | int numbers [ ], int codes[ ]

Front 27

How do you declare multiple int (or any type) arrays on the same line? (use numbers, codes, and scores)

Back 27

int [ ] numbers, codes, scores;

Front 28

Processing a data item in an array is done the same way as any other variable. Give an example of the fourth item of the hours array being multiplied by the payRate variable and this product being put into grossPay.

Back 28

grossPay = hours[3] * payRate;

Front 29

How is the Enhanced for Loop described?

Back 29

Simplified array processing (read only)

Loops through all elements.

"for each item in the array, do..."

Front 30

What is Dr. Bailes algorithm for "enhanced for loops"?

Back 30

for (datatype elementVariableName : arrayName)

{

statement;

}

(Where the data type should be the same as the data type of the array being used.

Front 31

Arrays themselves are __________ts and each provides a _______ field named ____________ that is a c__________t that can be tested, displayed, compared, etc.

Back 31

objects, public field, length, constant

Front 32

Index subscripts are/ are not equal to index length

Back 32

not, the index goes to 1 - arrayLength

Front 33

If you allow the user to specify array size, what should you do to keep things....okay?

Back 33

Run a check to make sure the user specifies a reasonable size

Front 34

You can r__________gn array references :) but what happens to the old array values?

Back 34

reassign, they are LOST

Front 35

int [ ] array2 = array1

Is this the right or wrong way to copy an array? What is the proper name for this method?

Back 35

NOT THE RIGHT WAY! It's called a Shallow Copy

Front 36

To correctly copy an array, you must first have ___________ arrays of the _______ _____ze (NOT JUST 2 REFERENCES TO THE SAME ARRAY)

Then you must _______ the _________ elements of one array to the other, one ________ at a time.

Back 36

two separate, same size, copy the individual elements, one at a time in aloop

Front 37

What is the correct method of copying arrays called?

Back 37

A Deep Copy

Front 38

Arrays can be _________ed to methods like any other _______________ r______________e variable

Back 38

passed, object reference

Front 39

When comparing arrays, the == operator only determines whether array _______________ refer to the _______ a_____ ________t

Back 39

references, same array object

Front 40

What are some common tasks for which we have algorithms?

Back 40

-Fill or populate an array with info

-Display array

-Find largest/smallest value in an array

-Determine whether an array contains a particular value

-Sort the data in the array into some order

Front 41

What is the algorithm for finding the largest in an array?

Back 41

- Scan the items one at a time

- The first item is the largest at this point

- Scan the rest until we find larger

- Remember this ^

- Repeat previous 2 steps until finished

- At the end we will have the largest item

Front 42

The difference in code between comparing the smallest items vs the largest items is...

Back 42

Changing the > to an < in the if (arrayName[ I ] targetValue)

Front 43

What was the header for accessing arrays?

Back 43

Accessing the Elements of an Array

Front 44

When talking about the fact that array elements can be used as any other variable, what was the header?

Back 44

Inputting and Outputting Array Elements

Front 45

What (this was a header) is required to ensure that you do not try to access an element that does not exist?

Back 45

Bounds Checking

Front 46

When you use a for loop (other examples may exist) and you your loop goes one beyond the array length, what error is this called?

Back 46

off-by-one

Front 47

what is the proper term for: int numbers [ ];

Back 47

Array Declaration