Java constructors - Study guides, Revision notes & Summaries

What is the spring framework? correct answers It is a development framework created by Java that is meant to aid in developing virtually any kind of software given the right configuration. what is spring boot? correct answers A product that gets you into building a product with the spring framework quickly by providing other services to help with configurations, setting up virtual servers, etc. What is the use of the @ symbol in Java? correct answers It specifies an annotation in Java. The...

What are the components of a Java class file? * Package statement * Import statements * Comments * Class declaration { Variables Comments Constructors Methods Nested classes Nested interfaces Enum } If a class includes a package statement, where must it be placed? The first statement of the class file What are the two ways a class can use another packages classes? 1. By declaring an import statement of the fully qualified package + class name 2. By delcaring a variab...

Who is responsible for making sure that the precondition of a method is met? correct answers The client that calls the method Who is responsible for making sure that the postcondition of a method is met? correct answers The implementer of the method At which times is it safe to assume that the invariant of a class is true? correct answers After the constructor for the object has completed At the beginning of a public method After a public method has finished Which data types can be th...

A Programmer’s Guide to Java™ SCJP Certification Third Edition This page intentionally left blank A Programmer’s Guide to Java™ SCJP Certification A Comprehensive Primer Third Edition Khalid A. Mughal Rolf W. Rasmussen Upper Saddle River, New Jersey • Boston • Indianapolis • San Francisco New York • Toronto • Montreal • London • Munich • Paris • Madrid Capetown • Sidney • Tokyo • Singapore • Mexico City Many of the designations used by manufacturers...

Interface correct answers a place to specify a contract; provides a separation of concerns between class users and implementers; express some coherent concept like stacks, queues, sets and provides the methods and contracts for each How are Lists related to interfaces? correct answers Lists are interfaces in Java. It gives the contracts/methods that exist for all Lists, such as ArrayList, which is a class that implements this interface. ArrayList has all of the methods specified in the List i...

Reference Types Refers to an object, doesn't hold the value of the object they refer to, and stores the memory address where the object is located. Can be assigned null. Object Instance of a class Primitive Types Boolean, int, byte, double, float, long, don't have methods declared to them. Literal Fixed value that doesn't need further calculations in order to be assigned to a variable Local Variables Defined within a method, must be initialized before use. In ...

__________________ programming language provides a programmer with the ability to precisely define each step in the performance of a task as well as the means to be strongly modular. - ANSWER-Procedural ----The focus of procedural programming is to break down a programming task into a collection of data structures, variable, and subroutines, as opposed to object oriented programming, which breaks down a programming task into objects. In Java, every statement must end with this symbol - ANSWER...

Apex Workbook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Part 1: Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Creating Warehouse Custom Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Using the Developer Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Activati...

CSE 205 Exam Questions And Answers (Verified And Updated) An advantage of composition is the fact that we can sometimes reuse classes that we have already written, instead of having to design and write new classes. - answerTrue In Java a variable must... a) zeroed before it can be used b) be normalized before it can be used c) be deleted before it can be used d) be initialized before it can be used e) None of the above - answerAnswer: e): None of the above If "declared before it can b...

Boolean and boolean are the same data type correct answers False Static members belong to the class itself, and not to the object correct answers True A class in java can have multiple constructors correct answers True in java, it is possible to have a function that exists outside the class correct answers False Static member functions have access to instance members and data correct answers False in junit testing, we can safely assume that the test cases will run in the order the...