Arrays

Question 1

________ store values, but typically only ________ at a time.

Answer 1

Variables, one value

Question 2

_____ allow you to ______ a variable _______ efficiently.

Answer 2

Loops, reuse, multiple times

Question 3

A ________ is a way of organizing and storing data so that it can be ________ and ________ efficiently.

Answer 3

data structure, accessed, modified

Question 4

What are the common Data structures? (name 6 common structures)

Answer 4

arrays, linked lists, stacks, queues, hash tables, trees

Question 5

______ in Java are _______(consisting of parts all of the same kind.)

Answer 5

Arrays, homogeneous

Question 6

Arrays store ________ values of a specific _______ and provide _________ to store the same.

Answer 6

one or more, data type, indexed access

Question 7

A specific ________ in an array is accessed by its ______.

Answer 7

element, index

Question 8

______ offer a convenient means of ________
related information.

Answer 8

Arrays, grouping

Question 9

An ______ in an array is a ______ value stored at a
particular position. Each element shares the same
_______ as the array.

Answer 9

element, single, data type

Question 10

What is the plural form of index?

Answer 10

Indices

Question 11

What is an index?

Answer 11

An index is the position of an element inside an array.

Question 12

A _________ is the _______ address in computer memory (RAM) where an array stores its ________.

Answer 12

memory location, physical, elements

Question 13

What happens when an array is created?

Answer 13

Java allocates a continuous block of memory to store its values.

Question 14

Arrays in Java are ______ types, meaning the variable holds a ________ (not actual values).

Answer 14

reference, memory address

Question 15

The _______ is the total ______ of elements stored in an array. In Java, we use .length to get the size of the array.

Answer 15

array length, number

Question 16

What are the parts of array?(refer to the anatomy of an array)

Answer 16

name of the array list, indexes, array objects with index positions, value of the list, address of the list, memory address

Question 17

What are the 3 main types of Arrays?

Answer 17

Single Dimensional Array, Double Dimensional Array, Multi-Dimensional Array

Question 18

This array contains one or more arrays, allowing you to store data in a structured, tabular, or grid-like format, like a table with rows and columns

Answer 18

Multi-Dimensional Arrays

Question 19

This Array is a ____ dimensional array can be visualized as a table or a matrix. It contains rows and columns.

Answer 19

Double Dimensional Arrays

Question 20

This is an Array where you can imagine a ____ Dimensional Arrays as a row, where elements are stored one after another.

Answer 20

Single Dimensional Arrays

Question 21

What is the first step you will do in declaration and initialization?

Answer 21

you must declare a variable of the desired array type

Question 22

What is the second step you will do in declaration and initialization?

Answer 22

you must allocate the memory that will hold the array, using new, and assign it to the array variable.

Question 23

Identify the parts(the ones inside the parenthesis) of this syntax: (int) a = new int ([5]);

Answer 23

data type, size of array

Question 24

Each element is initialized to a _______, a process known as _________.

Answer 24

default value, auto-initialization

Question 25

A ________ array (1D array) in Java is a structured way of ______________ of the same data type under a single variable name.

Answer 25

one-dimensional, storing multiple values

Question 26

Since an ______ is an ________ structure, the 1st element of the array is stored at the ____ index, 2nd element is stored on __ index, and so on.

Answer 26

array, index-based, 0th, 1st

Question 27

How to access 1D array element?

Answer 27

We can access a specific element by its index within the square bracket

Question 28

It is the way of processing each array element sequentially from the first to the last.

Answer 28

Array Traversal

Question 29

Since arrays have a ______, they often require _____ to efficiently _____, ______, and process their elements.

Answer 29

fixed size, loops, access, modify

Question 30

Which loop is commonly used when working with arrays?

Answer 30

For-loop

Question 31

The ______ is used to iterate through an array, allowing us to access each _____one by one without _____ writing separate statements for each index.

Answer 31

for loop, element , manually

Question 32

Why do we use for loop with array?

Answer 32

Efficient Iteration, Handles Arrays of Any Size, Easy Access to Indexes, Useful for Common Operations

Question 33

What is the other name for enhanced for loop?

Answer 33

for-each loop

Question 34

This eliminates the need for index tracking, making the code cleaner and easier to read.

Answer 34

enhanced for loop or for-each loop

Question 35

What are the 2 limitations of for-each loop?

Answer 35

1.Cannot Modify Array Elements and 2.Cannot Access Index Directly

Question 36

what are the 5 pitfalls of arrays?

Answer 36

1.Array Index Out of Bounds Exception (ArrayIndexOutOfBoundsException) 2.Fixed Size Limitation 3.Forgetting to Initialize an Array 4. Incorrect Use of .length 5. Forgetting That Arrays in Java Are Zero-Indexed

Question 37

Identify what type of pitfall is this: What is the error that occurs when .length is used incorrectly in loops?

Answer 37

Incorrect Use of .length

Question 38

Identify what type of pitfall is this: What error occurs when an array is declared but not initialized?

Answer 38

Forgetting to Initialize an Array

Question 39

Identify what type of pitfall is this: What is a common mistake beginners make regarding Java array indexing?

Answer 39

Forgetting That Arrays in Java Are Zero-Indexed

Question 40

Identify what type of pitfall is this: What exception occurs when trying to access an index outside the valid range of an array in Java?

Answer 40

Array Index Out of Bounds Exception (ArrayIndexOutOfBoundsException)

Question 41

Identify what type of pitfall is this: What is a limitation of arrays in Java regarding their size?

Answer 41

Fixed Size Limitation

Question 42

Java provides various utility methods to work with arrays through the _______ in the_______.

Answer 42

Arrays class, java.util package

Question 43

The ____ class is a utility class that provides _________ to perform common array ________.

Answer 43

Arrays, static methods, operations

Question 44

It simplifies tasks such as _______, ________, _______, and ________ without requiring manual implementation.

Answer 44

sorting, comparing, filling, copying arrays

Question 45

This array method sorts arrays in ascending order.

Answer 45

Arrays.sort()

Question 46

This array method checks if two arrays contain the same elements in the same order.

Answer 46

Arrays.equals()

Question 47

This array method sets all elements in an array to a specific value.

Answer 47

Arrays.fill()

Question 48

This array method creates a new array with the same elements as the original.

Answer 48

Arrays.copyOf()

Question 49

This array method converts an array into a formatted String representation.

Answer 49

Arrays.toString()

Question 50

This array method is used to search for an element in a sorted array efficiently.

Answer 50

Arrays.binarySearch()

Question 51

This array method is used to convert a String into a character array (char[]).

Answer 51

toCharArray()