A search algorithm ________.

is used to find an item in a data structure

always returns the first result

is only applicable to sorted data

cannot be implemented in Python

A ragged array is __________.

a two-dimensional array where the rows have different numbers of columns

a one-dimensional array for which the number of elements is unknown

a two-dimensional array for which the number of rows is unknown

a partially initialized two-dimensional array of ranged values

When an array is passed to a method __________.

it is passed just as any other object would be passed

the method has direct access to the original array

a reference to the array is passed

The binary search algorithm __________.

will cut the portion of the array being searched in half each time it fails to locate the search value

is less efficient than the sequential search algorithm

will have a maximum number of comparisons equal to the number of elements in the array

will, normally, have the number of comparisons that is half the number of elements in the array

In order to do a binary search on an array, __________.

you must first do a sequential search to be sure the element you are looking for is there

the values of the array must be numeric

The sequential search algorithm __________.

uses a loop to sequentially step through an array, starting with the first element

returns 1 if the value being searched for is found or -1 if the value is not found

requires the array to be ascending order

must always be implemented as a method

In memory, an array of String objects __________.

consists of an array of references to String objects

consists of elements, each of which is a reference to a String object

is compressed to four bytes for each element

must be initialized when the array is declared

Which of the following is a correct method header for receiving a two-dimensional array as a parameter?

public static void passMyArray(int[][])

public static void passMyArray(int[1, 2])

public static void passMyArray[1][2])

public static void passMyArray(int[],int[] myArray)

What would be the result of executing the following code? int[] X = {0, 1, 2, 3, 4, 5};

An array of 6 values, ranging from 0 through 5 and referenced by the variable X will be created.

An array of 6 values, all initialized to 0 and referenced by the variable X will be created.

The variable X will contain the values 0 through 5.

Given the following two-dimensional array declaration, which statement is true? int[][] numbers = new int[6][9];

The numbers array has 6 rows and 9 columns.

The numbers array has 6 columns and 9 rows.

What would be the result after the following code is executed? int[] numbers = {40, 3, 5, 7, 8, 12, 10}; int value = numbers[0]; for (int i = 1; i

The value variable will contain the lowest value in the numbers array.

The value variable will contain the average of all the values in the numbers array.

The value variable will contain the sum of all the values in the numbers array.

The value variable will contain the highest value in the numbers array.

What would be the result after the following code is executed? final int SIZE = 25; int[] array1 = new int[SIZE]; int value = 0; for (int a = 0; a < array1.length; a++) { value += array1[a]; }

value contains the sum of all the values in array1.

value contains the highest value in array1.

value contains the lowest value in array1.

Arrays and ArryList

Authored by Yuba Siwakoti

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40 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An ArrayList object automatically expands in size to accommodate the items stored in it.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Java does not limit the number of dimensions an array may have.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To determine if two arrays are equal you must compare each of the elements of the two arrays.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A sorting algorithm is a technique for scanning through an array and rearranging its contents in some specific order.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Objects in an array are accessed with subscripts, just like any other data type in an array.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A sorting algorithm is used to locate a specific item in a larger collection of data.

True

False

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Arrays and ArryList

An ArrayList object automatically expands in size to accommodate the items stored in it.

Java does not limit the number of dimensions an array may have.

The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.

To determine if two arrays are equal you must compare each of the elements of the two arrays.

A sorting algorithm is a technique for scanning through an array and rearranging its contents in some specific order.

Objects in an array are accessed with subscripts, just like any other data type in an array.

A sorting algorithm is used to locate a specific item in a larger collection of data.

An array can hold multiple values of several different types of data simultaneously.

Declaring an array reference variable does not create an array.

Once an array is created, its size cannot be changed.

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