Java constructors - Study guides, Revision notes & Summaries

AP Computer Science Final Exam with Verified Solutions In Java, a method can have the same name as another method in the same class if their parameter lists are different. True The private access modifier allows a class member to be accessed only within the same package. False In Java, a String is a mutable object. False Java supports multiple inheritance directly through classes. False 2 The super keyword in Java is used to refer to the parent classs method...

AP Computer Science A 100& Correct What is encapsulation in object-oriented programming? Encapsulation is the concept of bundling data (fields) and methods (functions) that operate on the data into a single unit, typically a class. It helps to protect the internal state of an object and exposes only necessary parts through public methods. What does inheritance allow you to do in Java? Inheritance allows a subclass to inherit fields and methods from a superclass. This promotes co...

Which of the following is not a primitive data type in Java? A. int B. double D. Character C. String E. C and D - Answer-E. C and D Which of the following type casting is done implicitly in Java? A. int to float B. double to float C. byte to short D. A and B E. A and C - Answer-E. A and C Which of the following is false about constructors in java? A. All classes in java have at least one constructor B. Constructors cannot be private C. Constructors' tasks include initialization o...

Which of the following is not a primitive data type in Java? A. int B. double D. Character C. String E. C and D : E. C and D Which of the following type casting is done implicitly in Java? A. int to float B. double to float 2 C. byte to short D. A and B E. A and C : E. A and C Which of the following is false about constructors in java? A. All classes in java have at least one constructor B. Constructors cannot be private C. Constructors' tasks include initialization of...

java A Java class is described in a text file with a ______ extension import The ______ keyword defines other classes or groups of classes that you are using in your class class The ______ keyword precedes the name of a class public The name of the class and the file name must match when the class is declared _______ modifier The keyword public in front of the class keyword is a ______ and not required instance Variables, or the data associated with programs are called ________ fields ...

What are the main features of Java? ~ 1. Object-oriented 2. Simple 3. Platform Independent 4. Secured 5. Robust 6. Portable 7. Multithreaded 8. Distributed What are the fundamental principles of OOP? ~ 1. Inheritance 2. Abstraction 3. Polymorphism 4. Encapsulation What is Inheritance in Java? ~ Inheritance is one of the key principles of OOP. Through Inheritance, one class can inherit the properties of another class. The class from which properties are inherited is called a...

CPSC 2150 Exam 1 Questions & Answers 2024/2025 When zipping up our directory on unix, which flag will we use to include all the subdirectories and their files as well? - ANSWERS-r Which of the following are included in a Makefile command? (may be more than one) - ANSWERStarget, dependencies, unix command to run In java, a main function must... - ANSWERSBe inside of a class Be static Have one argument, an array of strings Anything that is not one of the 8 primitive data types in J...

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...

CNIT 325 Questions and Answers Rated A+ To compile: javac MyFirstP Will produce: MyFirstP To execute: java MyFirstProgram Java Class is a design construct, includes data (attributes) and behavior (methods) Object The living version of a class; "physical" version of the design construct class is like a house blueprint object is the house "Object is an instance of a class" Encapsulation "Data hiding" The idea of safeguarding data inside behavior. Access to the data is controlled by the...

Abstract classes used when: Common abstract methods to be re-used for different clients. 'Extend' the class. Abstract classes do not have pre-defined methods, only abstract methods. T/F? False. Abstract class must have at least one abstract method, rest may be initiated pre-defined methods. Interfaces used when: All abstract methods and no pre-defined methods. 'Implement' the class. Local (method) variables must be defined but not initialized. T/F? False. Local vari...