Java midterm study guide

I’m stuck on a Programming question and need an explanation.

Need all these questions checked and need correct answers for the whole test. I have provided the test in a word document.TEST 1 – MIDTERM – 1) What is the value of names[4] in the following array? String[] names - {"Jeff", "Dan", "Sally", "Jill", "Allie"}; a) Sally b) Allie (CORRECT) c) Jill d) None 2) Values held by attributes of an object describe the object's a) identity (CORRECT) b) operation c) state d) class 3) Which of the following can contain multiple entries and can grow its size/length automatically? a) Array (CORRECT) b) HashMap c) String d) StringBuilder 4) Which keyword is used to indicate that a class cannot be extended through inheritance a) abstract b) final (CORRECT) c) public d) static 5) An abstract class cannot a) be instantiated b) have abstract methods c) be used as a superclass d) have fields/attributes (CORRECT) 6) What is wrong with the following constant declaration? final int count = "2"; a) type int is not valid for final designation b) count is a Java reserved keyword and cannot be used as an identifier (CORRECT) c) count must be assigned an integer value d) visibility is not provided for the constant. 7) What value is printed for the following statement? int n = 0; for (int i=1; i < 6; i = i + 2) { n = n + 1; } System.out.println(n); a) 2 b) 3 (CORRECT) c) 4 d) 5 8) What happens when this statement is executed? Automobile car = new Automobile (1); a) An object of the Automobile class is created. (CORRECT) b) An object of the Automobile class is declared, but not created. c) A constructor that accepts a string in the Automobile class is called. d) The default constructor in the Automobile class is called. 9) A methods signature is defined by which of the following? a) method name only b) method name, number of arg, and arg types c) method name, number of arg, abd arg types and sequences d) method name, number of arg, arg types and sequences, and method return type (CORRECT) 10) The maximum number of interfaces which can be implemented by a class is a) zero b) one c) two d) more than two (CORRECT) 11) Two or more methods in the same class may have the same name as long as ___ are different. a) their return values (CORRECT) b) their signatures c) the statements within their curley braces d) their access specifiers 12) Where an object is passed as an argument for a method _________ is actually passed. a) a copy of the object b) a reference to the object c) the name of the object d) none of the following 13) What keyword do you use in class declaration to create a subclass? a) extends (CORRECT) b) overrides c) inherites d) overloads 14) Which of the following statements is false a) All the methods in an interface are abstract b) All interface can contain static constraints c) A class can inherit another class and all the same time implement an interface d) A Class can implement just the methods of an interface it needs instead of all methods of an interface. 15) To write a file more efficiently you should use a a) FileReader stream b) BufferedWriter stream c) Filestream d) FileWriter stream (CORRECT) 16) Which method transmits any remaining data from the buffer without closing the stream? a) close() b) flush() c) send() d) stop() 17) Assume x is an integer number what is the highest index value in the following array? byte[] values = new byte[x]; a) 0 b) x-1 c) x d) x+1 18) To change the size of an ArrayList, you must a) code a stateent that specified the new number of elements b) code a statement that specifies the percent by which you want the size increased c) either a or b d) none of the above ( CORRECT ) 19) What is the value of s after the following code is executed? ArrayList inventory = new ArrayList(); inventory.add("B"); invetory.add("C"); inventory.add("D"); inventory.add(1,"E"); String s = inventory.get(2); add(E e): Appends the specified element to the end of this list add(int index, E element): inserts the specified element at the specified position in this list. a) "B" b) "C" c) "D" d) "E" 20) When the code within a catch block executed? a) When the code in the try block doesn't compile b) When the exception specified in the catch block is thrown in the try block c) When the try blok finishes executing d) When a runtime error occurs 21) Which of the following can you not code in a subclass? a) a method with the same signature as a method in the superclass b) a call to a constructor of the superclass c) a method that's not ddefined by the superclass d) a call to a private method of the superclass (CORRECT) 22) What propery controls whether the user can edit the text stored in the component? a) editable b) focusable c)mnemonic d) text (CORRECT) 23) What property to you use to specify a shortcut key that you can use to access the component? a) editable (CORRECT) b) focusable c) mnemonic d) text 24) To add controls to a form and adjust them so they display correctly,