Question 1UNIT 2 MILESTONE 2What is true about an ArrayList as a collection type?This collection type can contain duplicate values.1 2 3 4If a value is added to this collection type that exists, that value will notbe added.This collection type does not contain duplicate values.This collection type uses key-value pairs to track data.SAVE & CONTINUEReport an issue with this question56 7O Mark this question8UN2.1 A222.2.12.2 Loop2.2:2.2.2 Question 4What should the return statement say?static String echoString (String text) {return}O text text textThe following method should return the text variable three times,combined together side by side.text + text + texttext + "\n" + text + "\n" + textO Nothing should be added.SAVE & CONTINUERun script "void(0);"esc+F1@F2#Say20F32$3 4OMark this question000F45%6F578>9HereMilestUNIT 2 T12.1 Arrays2.1.12.1.22.1.3.2.1.4 J2.1.5 C2.1.6 M2.1.7 De2.2 Loops2.1.8 Tic-2.2.1 Intro2.2.2 Loop*22210epF6

What is true about an array list as a collection type?a. if a value is added to this collection type…

What is true about an ArrayList as a collection type? If a value is added to this collection type that exists, that value will not be added. O This collection type can contain duplicate values. O This collection type does not contain duplicate values. O This collection type uses key-value pairs to track data.

What is true about an ArrayList as a collection type? If a value is added to this collection type that exists, that value will not be added. O This collection type can contain duplicate values. O This collection type does not contain duplicate values. O This collection type uses key-value pairs to track data.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

T/F 11) An array, when instantiated, is fixed in size, but an ArrayList can dynamically change in size when new elementsare added to it.
List collection views of a map interface
TRUE OR FALSE In order to use static methods in Collections, we must create a Collection object using a new operator.
TaskDeclare and implement 5 classes: FloatArray, SortedArray,FrontArray, PositiveArray & NegativeArray.1- The FloatArray class stores a dynamic array of floats and itssize. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the end of the array.- Overloading for the insertion operator << to write the array to afile (ofstream)- Overloading for the extraction operator >> to read the arrayelements from the file (ifstream) and add them to the array.- A destructor to deallocate the array2- The SortedArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the right place in the arraysuch that the array remains sorted with every add. Don’t add tothe array then sort but rather add in the right place.3- The FrontArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the front of…
What are the distinctions between an ArrayList and a Vector?Which collection class is best for data manipulation?
Q2 You have a dynamic array with 3 elements in it and a capacity of 4. The capacity doubles when additional space is needed and shrinks by 50% (rounding down) when the size is at or below 1/3 capacity. Answer the questions below for the following operation sequence: Add, Add, Remove, Remove, Remove Q2.1 What will be the capacity of the list when the whole sequence is completed? Answer= Enter your answer here
@6 The Reference-based Linked Lists: Select all of the following statements that are true. options: As a singly linked list's node references both its predecessor and its successor, it is easily possible to traverse such a list in both directions. According to the terminology introduced in class, the head reference variable in a singly linked list object references the list's first node. According to the terminology introduced in class, in a doubly linked list, each node references both the head and tail node. In a double-ended singly linked list, the tail reference variable provides access to the entire list. In a circular linked list, the last node references the first node.
6. the grade is under 20 which is outlier, remove it from the array list. 7. Print array list using System.out.println() 8. Use indexOf to print index of 80. 9. Use get function. 10. What is the difference between get and index of? 11. Print the values of the array list using Iterator class. 12.. Delete all the values of the array list using clear function. 13. Print all the values of the array after you execute clear using System.out.println(). what is the result of using clear function? 14. What is the shortcoming of using array List?
#Steps: Create a Main class. Declare an ArrayList in the main() method and store the given values in it. Create an array called output of the size of the ArrayList. Iterate through for-loop to get each element from the array List and load it into the array using the get() method of the list. Print the array to see the loaded elements. import java.util.ArrayList; import java.util.List; public class Main { public static void main(String[] args) { List<String> nameList = new ArrayList<String>(); nameList.add("Robert"); nameList.add("Samson"); nameList.add("Alex"); nameList.add("William"); System.out.println("Elements of List: " + nameList); // Create an array of the same size as nameList Hint: use size() method // Fetch the elements from the nameList and insert into newly created array // Hint: Use get() method to fetch the elements from…