Question 1

Swapping two values can be accomplished with two statements.

Accepted Answer

A) True 
 B)False

Question 2

Match between columns
                        Premises: The size can change during program execution

Accepted Answer

The Answer of java.util and multidimensional array and static methods is...

Question 3

import java.util.*; 
import javax.swing.*; 
public class binary_search 
{ 
    public static void main(String[] args) 
   { 
           int myNums[]={2, 44, 5, 66, 78, 90, 23, 66}; 
           int point, find = 78; 
           point = Arrays.binarySearch(myNums, find); 
           System.out.println("Element found at index " + point); 
   
    } 
} 
Using the above code, what output will be displayed when the program is executed? Describe how the binarySearch() method functions.

Accepted Answer

When executed, the println statement wil

Question 4

Write the code for bubble sorting a someNums array of integers.

Accepted Answer

int comparisonsToMake = someNums.length

Question 5

When mathematicians use a two-dimensional array, they often call it a ____.

Accepted Answer

A)  grid 
B)  net 
C)  matrix 
D)  mesh 
A)  grid 
B)  net 
C)  matrix 
D)  mesh

Question 6

Declare an ArrayList that declares a list of strings with a capacity of 20.

Accepted Answer

ArrayList<String&

Question 7

Match between columns
                        Premises: A data type for which only appropriate behaviors are allowed.

Accepted Answer

The Answer of two-dimensional array and add() method and Enumerated is...

Question 8

The negative integer returned by the binarySearch() method when the value is not found is the negative equivalent of the array ____.

Accepted Answer

A)  type 
B)  scope 
C)  size 
D)  length 
A)  type 
B)  scope 
C)  size 
D)  length

Question 9

Using the ArrayList add() method, write the statement to insert "July" in the first position of the months ArrayList . Describe what would happen if the position number is invalid for the ArrayList .

Accepted Answer

months.add(0, "July"); 
If the

Question 10

Match between columns
                        Premises: Arrays with more than one dimension

Accepted Answer

The Answer of type-safe and jagged array and dynamically resizable is...

Question 11

You can think of the single dimension of a single dimensional array as the height of the array.

Accepted Answer

A) True 
 B)False

Question 12

The simplest possible sort involves two values that are out of order.

Accepted Answer

A) True 
 B)False

Question 13

import java.util.*; 
public class sortArray 
{ 
     public static void main(String[] args) 
    { 
       double[] lengths = {120.0, 0.5, 0.0, 999.0, 77.3}; 
       Arrays.sort(lengths); 
         System.out.println(Arrays.toString(lengths)); 
    } 
} 
Using the above code, what will be the output of the println statement when the code is executed?

Accepted Answer

The sort() method wi

Question 14

public class EnumExample 
{ 
    enum Day {SUNDAY, MONDAY, TUESDAY, WEDNESDAY, 
              THURSDAY, FRIDAY, SATURDAY }; 
​ 
    Day day; 
​ 
    public EnumExample(Day day) 
    { 
        this.day = day; 
    } 
​ 
    public void giveFeedback() 
    { 
        switch (day) 
        { 
            case MONDAY: 
                System.out.println("Mondays are bad."); 
                break; 
​ 
            case FRIDAY: 
                System.out.println("Fridays are better."); 
                break; 
​ 
            case SATURDAY: case SUNDAY: 
                System.out.println("Weekends are best."); 
                break; 
​ 
            default: 
                System.out.println("Midweek days are so-so."); 
                break; 
        } 
     } 
​ 
    public static void main(String[] args) 
    { 
        EnumExample firstDay = new EnumExample(Day.MONDAY); 
        firstDay.giveFeedback(); 
        EnumExample thirdDay = new EnumExample(Day.WEDNESDAY); 
        thirdDay.giveFeedback(); 
        EnumExample fifthDay = new EnumExample(Day.FRIDAY); 
        fifthDay.giveFeedback(); 
        EnumExample sixthDay = new EnumExample(Day.SATURDAY); 
        sixthDay.giveFeedback(); 
        EnumExample seventhDay = new EnumExample(Day.SUNDAY); 
        seventhDay.giveFeedback(); 
    } 
} 
Using the above enumeration and code, what will be the output when the program is executed?

Accepted Answer

Mondays are bad. 
Midweek days

Question 15

The Arrays class ____ methods are a new feature in Java 8 that makes sorting more efficient when thousands or millions of objects need to be sorted.

Accepted Answer

A)  compare 
B)  equals 
C)  parallelSort 
D)  fill 
A)  compare 
B)  equals 
C)  parallelSort 
D)  fill

Question 16

Match between columns
                        Premises: A package containing the Arrays class

Accepted Answer

The Answer of one-dimensional array and java.util and two-dimensional array is...

Question 17

int[][] myVals = {{2, 4, 6},                   {1, 3, 5, 7}};
Using the above array, what is the value of myVals.length ?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  5 
A)  1 
B)  2 
C)  4 
D)  5

Question 18

Describe how to visualize the following array. How would you identify the location of the 99 that is stored in the array? 
int[][] someNumbers = {{8, 9, 10, 11}, 
{1, 3, 12, 15}, 
{5, 9, 44, 99} };

Accepted Answer

The someNumbers array contains three row

Question 19

Match between columns
                        Premises: A two-dimensional array that has rows of different lengths

Accepted Answer

The Answer of jagged array and two-dimensional array and ascending is...

Question 20

What is sorting and how are objects organized as a result of being sorted?

Accepted Answer

Sorting is the process of arranging a se

Swapping two values can be accomplished with two statements.

Write the code for bubble sorting a someNums array of integers.

When mathematicians use a two-dimensional array, they often call it a ____.

Declare an ArrayList that declares a list of strings with a capacity of 20.

The negative integer returned by the binarySearch() method when the value is not found is the negative equivalent of the array ____.

Using the ArrayList add() method, write the statement to insert "July" in the first position of the months ArrayList . Describe what would happen if the position number is invalid for the ArrayList .

You can think of the single dimension of a single dimensional array as the height of the array.

The simplest possible sort involves two values that are out of order.

The Arrays class ____ methods are a new feature in Java 8 that makes sorting more efficient when thousands or millions of objects need to be sorted.

int[][] myVals = {{2, 4, 6}, {1, 3, 5, 7}}; Using the above array, what is the value of myVals.length ?

Describe how to visualize the following array. How would you identify the location of the 99 that is stored in the array? int[][] someNumbers = {{8, 9, 10, 11}, {1, 3, 12, 15}, {5, 9, 44, 99} };

What is sorting and how are objects organized as a result of being sorted?

Creating Your First Java Classes

Using Data

Using Methods, Classes and Objects

More Object Concepts

Making Decisions

Looping

Characters, Strings and the Stringbuilder

Arrays

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Using Javafx and Scene Builder

Filters

Exam 9: Advanced Array Concepts

Swapping two values can be accomplished with two statements.

Write the code for bubble sorting a someNums array of integers.

When mathematicians use a two-dimensional array, they often call it a ____.

Declare an ArrayList that declares a list of strings with a capacity of 20.

The negative integer returned by the binarySearch() method when the value is not found is the negative equivalent of the array ____.

Using the ArrayList add() method, write the statement to insert "July" in the first position of the months ArrayList . Describe what would happen if the position number is invalid for the ArrayList .

You can think of the single dimension of a single dimensional array as the height of the array.

The simplest possible sort involves two values that are out of order.

The Arrays class ____ methods are a new feature in Java 8 that makes sorting more efficient when thousands or millions of objects need to be sorted.

int[][] myVals = {{2, 4, 6}, {1, 3, 5, 7}}; Using the above array, what is the value of myVals.length ?

Describe how to visualize the following array. How would you identify the location of the 99 that is stored in the array? int[][] someNumbers = {{8, 9, 10, 11}, {1, 3, 12, 15}, {5, 9, 44, 99} };

What is sorting and how are objects organized as a result of being sorted?

Creating Your First Java Classes

Using Data

Using Methods, Classes and Objects

More Object Concepts

Making Decisions

Looping

Characters, Strings and the Stringbuilder

Arrays

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Using Javafx and Scene Builder

Filters