How does a map tell us when an element is not found? A   The map returns a null reference. B   The map throws an exception. C   The map returns an empty data object. D   The map returns a value of zero.

1) What is one main disadvantage of an ArrayList? 2) Write a Java statement to create an ArrayList called list to hold 25 integers. 3) What is the type of the ArrayList defined in question number 2? 4) Write a for loop to initialize the objects in the ArrayList created in question number 2 above to -1.

A for construct is a loop construct that processes a specified list of objects. As a result,it is executed as long as there are remaining objects to process. True or False?

Please create a Java class that has the following data attributes and methods:   private int count - number of customers in the array    private customer Record[] data - array of customerRecord objects   public customer List() constructor that should initialize memory for data array and count value    public void getCustomerList(String fileName) - reads a file call fileName which is a text file containing lines (records) of customer data. This method fills the data array with the records from the file. The file will not have more than 100 records and will have the following format (where customer Number is an integer, firstName and lastName are Strings, and balance is a float:   customerNumber             firstName             lastName balance   public customerRecord getCustomer(int customerNumber) - returns the object corresponding to the customer with customerNumber. If the customer number is not in the array, return null.   public void enter CustomerRecord(customerRecord new_record)…

Missing line of code please

vWhat happens when an object such as an array is no longer referenced by a variable?

True or False: Object privileges allow you to add and drop users

Pls help ASAP

1-Write a JAVA program that reads an array from input file and invokes twodifferent methods Sort and Max ,that sorts the elements of the array and findsthe Max element and writes out the resulted array in to output file . Usetwo interfaces for methods and throw Exception Handling for Out Of Boundindex for the array

In Python: If you call the index method to locate an item in a list and the item is not found, this happens     A ValueError exception is thrown     An InvalidIndex exception is thrown     The method returns -1     Nothing happens, The method does not return anything and the program continues execution