Multidimensional Arrays

Question 1

A multi-dimensional array in Java is an _____ _______ ______

Answer 1

array of arrays

Question 2

It helps represent data in a ____ ______-_____(e.g., rows and columns),
similar to a spreadsheet or a
chessboard.

Answer 2

table-like structure

Question 3

It helps represent data in a table-like
structure (e.g., rows and columns),
similar to a _______or a
________.

Answer 3

spreadsheet or a chessboard.

Question 4

Multi-dimensional arrays are useful when
you need to store data in _____ ____ or
model ______ ______

Answer 4

1.grid form
2.mathematical
3.matrices

Question 5

The most common type is the _____ ______,
which is like a_____ with ______ and
___________

Answer 5

1. 2D array
2. table with rows and
   columns

Question 6

_____ also supports arrays with more than
two dimensions, like 3D arrays (arrays
of 2D arrays).

Answer 6

Java

Question 7

A 1D array is a linear collection of elements of the same _____ (type).

Answer 7

Type

Question 8

arrays are less common and are mainly
used in ______ ______ such as
3D modeling, simulations, or scientific
computing

Answer 8

1. 3D
2. specialized applications

Question 9

Each row is an array of integers, so the structure is an array where each element is itself an _____

Answer 9

Array

Question 10

A 1D array is stored in _____ memory locations (_________).

Answer 10

Continuous

Question 11

Static initialization is straightforward when you have _____ values (predefined).

Answer 11

Predefined

Question 12

3D arrays are less common and are mainly
used in specialized applications such as
3D_______, ______, or _______ ________.

Answer 12

1.modeling
2. simulations
3. scientific computing

Question 13

Java does not implement _____ ______ _____ internally like some other
languages. Instead, it’s an array of arrays, which means you can have jagged (uneven) arrays

Answer 13

true multidimensional arrays

Question 14

You can use multi-dimensional arrays for things
like:

Answer 14

1. Grids or maps
2. Matrix operations
3. Representing tabular data (rows and
   columns)
4. Game boards (e.g., Sudoku or Tic-TacToe)

Question 15

The _____ _____ (arr) holds the memory address of the first element.

Answer 15

reference variable

Question 16

Array elements are accessed by
______ ___ _______ from the reference
point.

Answer 16

incrementing the index

Question 17

2D Array: An array of arrays (a______to an
array of arrays).

Answer 17

reference

Question 18

1D Array: An array of arrays (a reference to an
array of arrays).

Memory Layout:
The first reference points to an array of rows
(arrays).
Each row (array) is stored separately in
memory.

Question 19

int[][] arr2D = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} };
The reference (______) holds the address of
the array of arrays.
Each row (_____) is stored at a different
memory location.

Answer 19

1. arr2D
   2.1D array

Question 20

The main array (arr3D) holds a _____ to
2D arrays (slices).
Each 2D array is stored separatel

Answer 20

reference

Question 21

_____ Array:
1. A continuous block of memory for the array elements.
2. The reference holds the address of the first element

Answer 21

1D

Question 22

______ Array:
1. An array of arrays; the main reference points to an array of
1D arrays.
2. Each row (1D array) is stored at a different memory
location.

Answer 22

2D

Question 23

_____ Array:
1. An array of arrays of arrays; the main reference points to
an array of 2D arrays.
2. Each 2D array (slice) is stored at a different memory
location.

Answer 23

3D

Question 24

_________ ______ is straightforward when
you have predefined values.

Answer 24

Static initialization

Question 25

_______ _______ provides flexibility when the values are calculated or assigned during runtime, making it the preferred choice in many situations.

Answer 25

Dynamic initialization

Question 26

_____ Array: A linear collection of elements of the same type.

Answer 26

1D

Question 27

Matrix addition and matrix subtraction are common operations performed using 2D arrays in _________ and _______ _____.

Answer 27

1.mathematics 2. computer graphics

Question 28

3D Array Structure: The _______ is a_______ grid with three layers. Each layer has 3 rows, and each row contains 3 columns

Answer 28

1. voxelGrid 2. 3x3x3

Question 29

3D Array Structure: The voxelGrid is a 3x3x3 grid with three layers. Each layer has_____ ____, and each row contains 3 columns.

Answer 29

3 rows

Question 30

Filling the Grid: ____ _______fill the grid with values (like color codes)

Answer 30

Nested loops

Question 31

____________: Use print statements or debugging tools to check the values of your indices and array elements during program execution. This can help identify issues in nested loops and other ______ ______.

Answer 31

Debugging logic errors

Question 31

_________ _______ are essential for traversing multidimensional arrays in Java. _________ _____: Use two loops (one for rows and one for columns). _______ ______: Use three loops (one for depth, one for rows, and one for columns). You can access or modify array elements by using the correct indices inside these loops.

Answer 31

Nested Loops 2D Arrays 3D Arrays

Question 31

2D Jagged Array: Rows can have a ________ number of _______.

Answer 31

different columns

Question 32

____________ _______: Ensure that you don 't access an out-of-bounds index in your array to avoid _________________________.

Answer 32

1. Boundary Checking 2.ArrayIndexOutOfBoundsException

Question 32

_________ Arrays: If the layers in your 3D array don't need to have the ____ ______ of rows and columns, you can use______ arrays.

Answer 32

Jagged same number jagged

Question 32

You can access individual elements using _____ ______: matrix[0][1] = 10;

Answer 32

two indices

Question 32

__________ : Avoid calculating the _________ ______ inside the _____. Store the length in a variable before the loop to improve efficiency

Answer 32

Optimization array length loop

Question 32

__________ : Use _______ or ______for array dimensions instead of hardcoding them.

Answer 32

flexibility variables constants

Question 33

________ : A ________is more readable when you don 't need the exact _______.

Answer 33

Readability for-each loop indices

Question 34

If you don 't know the size at the start, consider ________ ________the array based on user input or calculations.

Answer 34

dynamically initializing

Question 35

_________the Array Dimensions: Always ______ your array with the correct dimensions to ensure proper ______ ________.

Answer 35

Predefine initialize memory allocation

Question 36

_____ Arrays: Perfect for representing ____ grids or multi-layered data (scientific simulations). Used in _____ matrix addition and other operations. Ideal for representing 3D environments or voxel data.

Answer 36

3d 3d 3d

Question 36

_____ Arrays: Commonly used for tabular data storage (student grades, sales data). Useful in matrix operations (addition, subtraction). Used for game boards (chess, tic-tac-toe)

Answer 36

2d

Question 37

A _______ is a 3D pixel, like a tiny cube that represents a block of space. Used in ____ _______, gaming, and ________ ________. A voxel grid is a _______ ____ of ______that form a 3D object or environment.

Answer 37

voxel 3D modeling medical imaging 3D array of voxels

Question 38

_______Arrays: Multi-dimensional arrays where all sub-arrays (rows/columns) have the same length

Answer 38

rectangular