Module 5 Chapter 7 Arrays- Examen and Quiz PDF

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Module 5 Chapter 7 Arrays- Examen and Quiz...

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Question 1



5 out of 5 points

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

Tru e

Question 2



5 out of 5 points

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

Tru e

Question 3



5 out of 5 points

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

Tru e

Question 4



5 out of 5 points

Any items typed on the command-line, separated by space, after the name of the class, are considered to be one or more arguments that are to be passed into the main method. Selected Answer:

Tru e

Question 5



5 out of 5 points

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

Tru e

Question 6



5 out of 5 points

When an array of objects is declared but not initialized, the array values are set to 0. Selected Answer:

Fals e

Question 7



5 out of 5 points

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



Tru e

Question 8 5 out of 5 points

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

Fals e

Question 9



5 out of 5 points

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

Tru e

Question 10



5 out of 5 points

The Java compiler will display an error message when it processes a statement that uses an invalid subscript. Selected Answer:

Fals e

Question 11



5 out of 5 points

For the following code, what would be the value of str[2]? String[] str = {“abc”, “def”, “ghi”, “jkl”}; Selected Answer: mal Correcta es :

“ghi”

A reference to the String

"ghi" Question 12



5 out of 5 points

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

The numbers array has 6 rows and 9 columns. Question 13



5 out of 5 points

The binary search algorithm Selected Answer:

will cut the portion of the array being searched in half each time it fails to locate the search value. Question 14



5 out of 5 points

In order to do a binary search on an array Selected Answer:



the array must first be sorted. Question 15

5 out of 5 points

The ________ method removes an item from an ArrayList at a specific index. Selected Answer:

remove

Question 16



5 out of 5 points

A search algorithm Selected Answer:

is used to locate a specific item in a collection of data. Question 17



5 out of 5 points

To return an array of long values from a method, which return type should be used for the method? Selected Answer:

long[]

Question 18



5 out of 5 points

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

An array of 6 values, ranging from 0 through 5 and referenced by the variable x will be created. Question 19



5 out of 5 points

A partially filled array is normally used Selected Answer:

with an accompanying integer value that holds the number of items stored in the array. Question 20



5 out of 5 points

What is the value of scores[2][3] in the following array?

Selected Answer:



94

Question 1 5 out of 5 points

To return an array of long values from a method, which return type

should be used for the method? Selected Answer:

long[]

Question 2



5 out of 5 points

Java provides a mechanism known as a ________ which makes it possible to write a method that takes a variable number of arguments. Selected Answer:

variable-length argument list Question 3



5 out of 5 points

Selected Answer:

It specifies that only String objects may be stored in the ArrayList object. Question 4



5 out of 5 points

If numbers is a two-dimensional array, which of the following would give the number of columns in row r? Selected Answer:

numbers[r].length

Question 5



5 out of 5 points

A search algorithm Selected Answer:

is used to locate a specific item in a collection of data. Question 6



5 out of 5 points

When an array is passed to a method Selected Answer:

All of these are true. Question 7



5 out of 5 points

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



The numbers array has 6 rows and 9 columns. Question 8

0 out of 5 points

Which method is used to determine the number of items stored in an ArrayList object? Selected Answer:

items

CREO K ES SIZE

Question 9



5 out of 5 points

What would be the result after the following code is executed? Int [ ] numbers = {40, 3, 5, 7, 12, 10}; int value = numbers[0]; for (int I = 1; I < numbers.length; i++) { if (numbers[i] < value) value = numbers [i];}

Selected Answer:

The value variable will contain the lowest value in the numbers array. Question 10



5 out of 5 points

Which of the following statements is(are) true about this code? final int ARRAY_SIZE = 10; long[] array1 = new long[ARRAY_SIZE]; Selected Answer:

All of these are true. Question 11



5 out of 5 points

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

Tru e

Question 12



5 out of 5 points

Any items typed on the command-line, separated by space, after the name of the class, are considered to be one or more arguments that are to be passed into the main method. Selected Answer:



Tru e

Question 13 5 out of 5 points

When an array of objects is declared but not initialized, the array values are set to 0. Selected Answer:

Fals e

Question 14



5 out of 5 points

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

Tru e

Question 15



5 out of 5 points

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

Tru e

Question 16



5 out of 5 points

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

Fals e

Question 17



5 out of 5 points

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

Tru e

Question 18



5 out of 5 points

The Java compiler will display an error message when it processes a statement that uses an invalid subscript. Selected Answer:

Fals e

Question 19



5 out of 5 points

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



Tru e

Question 20 5 out of 5 points

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

Tru

e

Question 1 5 out of 5 points

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

Tru e

Question 2 5 out of 5 points

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

Tru e

Question 3 5 out of 5 points

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

Tru e

Question 4 5 out of 5 points

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

Tru e

Question 5 5 out of 5 points

The Java compiler will display an error message when it processes a statement that uses an invalid subscript. Selected Answer:

Fals e

Question 6 5 out of 5 points

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

Fals e

Question 7 5 out of 5 points

When an array of objects is declared but not initialized, the array values are set to 0. Selected

Fals

Answer:

e

Question 8 5 out of 5 points

Any items typed on the command-line, separated by space, after the name of the class, are considered to be one or more arguments that are to be passed into the main method. Selected Answer:

Tru e

Question 9 5 out of 5 points

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

Tru e

Question 10 5 out of 5 points

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

Tru e

Question 11 5 out of 5 points

What would be the result after the following code is executed? Int [ ] numbers = {50, 10, 15, 20, 25, 100, 30}; int value = 0; for (int I = 1; I < numbers.length; i++); value += numbers [i];

Selected Answer:

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

Question 12 5 out of 5 points

Which of the following is a correct method header for receiving a two-dimensional array as an argument? Selected Answer:

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

Question 13 5 out of 5 points

A(n) ________ is used as an index to pinpoint a specific element within an array.

Selected Answer:

subscri pt

Question 14 5 out of 5 points

The ________ method removes an item from an ArrayList at a specific index. Selected Answer:

remove

Question 15 5 out of 5 points

If numbers is a two-dimensional array, which of the following would give the number of columns in row r? Selected Answer:

numbers[r].length

Question 16 5 out of 5 points

A ragged array is Selected Answer:

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

Question 17 5 out of 5 points

Which of the following is a valid declaration for a ragged array with five rows but no columns? Selected Answer:

int[][] ragged = new int[5][];

Question 18 5 out of 5 points

A partially filled array is normally used Selected Answer:

with an accompanying integer value that holds the number of items stored in the array.

Question 19 5 out of 5 points

What would be the result after the following code is executed?

Selected Answer:

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

Question 20 5 out of 5 points

Java provides a mechanism known as a ________ which makes it possible to write a method that takes a variable number of arguments. Selected Answer:

variablelength argumen t list

EXAMEN Question 1 5 out of 5 points

Java provides a mechanism known as a ________ which makes it possible to write a method that takes a variable number of arguments. Selected Answer:

variable-length argument list

Question 2 5 out of 5 points

Which of the following import statements is required in order to use the ArrayList class? Selected Answer:

import java.util.ArrayList;

Question 3 5 out of 5 points

What would be the result after the following code is executed?

Selected Answer:

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

Question 4 5 out of 5 points

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

Selected Answer:

Tru e

Question 5 5 out of 5 points

A partially filled array is normally used Selected Answer:

with an accompanying integer value that holds the number of items stored in the array.

Question 6 5 out of 5 points

Which of the following methods returns a string representing all of the items stored in an ArrayList object? Selected Answer:

toString

Question 7 5 out of 5 points

What will be the result after the following code is executed?

Selected Answer:

The code contains a syntax error and will not compile.

Question 8 5 out of 5 points

Which of the following statements is(are) true about this code? final int ARRAY_SIZE = 10; long[] array1 = new long[ARRAY_SIZE]; Selected Answer:

All of these are true.

Question 9 5 out of 5 points

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

The numbers array has 6 rows and 9 columns.

Question 10 5 out of 5 points

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

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

Question 11 5 out of 5 points

The Java compiler will display an error message when it processes a statement that uses an invalid subscript. Selected Answer:

Fals e

Question 12 5 out of 5 points

To return an array of long values from a method, which return type should be used for the method? Selected Answer:

long[]

Question 13 5 out of 5 points

An array of String objects Selected Answer:

consists of an array of references to String objects.

Question 14 5 out of 5 points

Which method is used to determine the number of items stored in an ArrayList object? Selected Answer:

size

Question 15 5 out of 5 points

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

Tru e

Question 16 5 out of 5 points

A sorting algorithm is a technique for scanning

through an array and rearranging its contents in some specific order. Selected Answer:

Tru e

Question 17 5 out of 5 points

A ragged array is Selected Answer:

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

Question 18 5 out of 5 points

The ________ method removes an item from an ArrayList at a specific index. Selected Answer:

remove

Question 19 5 out of 5 points

A(n) ________ is used as an index to pinpoint a specific element within an array. Selected Answer:

subscri pt

Question 20 5 out of 5 points

In order to do a binary search on an array Selected Answer:

the array must first be sorted....