The document discusses topics related to object-oriented programming concepts in Java, including:
- Describing, comparing and contrasting primitive data types, enums, and objects
- Classes, abstract classes, interfaces and inheritance
- Class composition and associations between classes
- Information hiding using private attributes and public methods
- Polymorphism applied to classes and interfaces
Here we are going to learn why is a good practice to use interfaces and how they are different from abstraction classes. Further more we are going to see how which one of them to use.
Here we are going to learn why is a good practice to use interfaces and how they are different from abstraction classes. Further more we are going to see how which one of them to use.
Defining Simple Classes
Using Own Classes and Objects
Access Modifiers
Constructors and Initializers
Defining Fields
Defining Properties, Getters and Setters
Defining Methods
Exercises: Defining and Using Own Classes
In this chapter we will understand how to define custom classes and their elements. We will learn to declare fields, constructors and properties for the classes. We will revise what a method is and we will broaden our knowledge about access modifiers and methods.
100% Accurate and Updated dumps available for 1Z0-804 Exam-Java SE 7 Programmer II get 20% off on all dumps visit@https://www.troytec.com/1Z0-804-exams.html
Chapter 4:Object-Oriented Basic ConceptsIt Academy
Exam Objective 1.1 Describe, compare, and contrast primitives (integer, floating point,boolean, and character), enumeration types, and objects.
Exam Objective 3.1 Develop code that uses primitives, enumeration types, and object references, and recognize literals of these types.
Framhald af umfjöllun um hlutbundna forritun og hönnun. Nú förum við yfir Generic Programming sem sem leið til að búa til sveigjanlega og endurnýtanlegar einingar. Skoðum líka reflection. Þá verður farið fyrir hvernig má hann laustengdar einingar og notum við frægan andarleik sem dæmi.
Þá mun Code Horror Dude kíkja í heimsókn
In computer programming, code smell is any symptom in the source code of a program that possibly indicates a deeper problem. Code smells are usually not bugs—they are not technically incorrect and do not currently prevent the program from functioning. Instead, they indicate weaknesses in design that may be slowing down development or increasing the risk of bugs or failures in the future.
Defining Simple Classes
Using Own Classes and Objects
Access Modifiers
Constructors and Initializers
Defining Fields
Defining Properties, Getters and Setters
Defining Methods
Exercises: Defining and Using Own Classes
In this chapter we will understand how to define custom classes and their elements. We will learn to declare fields, constructors and properties for the classes. We will revise what a method is and we will broaden our knowledge about access modifiers and methods.
100% Accurate and Updated dumps available for 1Z0-804 Exam-Java SE 7 Programmer II get 20% off on all dumps visit@https://www.troytec.com/1Z0-804-exams.html
Chapter 4:Object-Oriented Basic ConceptsIt Academy
Exam Objective 1.1 Describe, compare, and contrast primitives (integer, floating point,boolean, and character), enumeration types, and objects.
Exam Objective 3.1 Develop code that uses primitives, enumeration types, and object references, and recognize literals of these types.
Framhald af umfjöllun um hlutbundna forritun og hönnun. Nú förum við yfir Generic Programming sem sem leið til að búa til sveigjanlega og endurnýtanlegar einingar. Skoðum líka reflection. Þá verður farið fyrir hvernig má hann laustengdar einingar og notum við frægan andarleik sem dæmi.
Þá mun Code Horror Dude kíkja í heimsókn
In computer programming, code smell is any symptom in the source code of a program that possibly indicates a deeper problem. Code smells are usually not bugs—they are not technically incorrect and do not currently prevent the program from functioning. Instead, they indicate weaknesses in design that may be slowing down development or increasing the risk of bugs or failures in the future.
Oracle Certified Associate (OCA) Java SE 8 Programmer II (1Z0-809) - Practice...Udayan Khattry
Assess your preparation with these Practice Test Questions with Explanation. Questions are Extracted from Highest Rated Course on Udemy which has helped a lot of students to pass the exam with good score.
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Access our sample Java8 certification questions.
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For each 1z0-808 certification question you can find the solution, the explanation and the exam objective of 1z0-808
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
3. QUESTION 01 Which four are primitive integer types in Java? (Choose four.) A. int B. byte C. long D. char E. float F. String G. Integer
4. QUESTION 02 Which two compile without error? (Choose two.) A. boolean b = 0; B. float f = 3.14; C. double d = 1000; D. char c = '0078';
5. QUESTION 03 Which three are legal ways to declare and initialize an instance variable? (Choose three.) A. static int x = 42; B. public int x = 'c'; C. public int x = null; D. public Integer f = null; E. static integer f = new integer (42); F. public integer f = new integer(42);
6. QUESTION 04 Which two are valid? (Choose two.) A. enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES } class EnumTest { public static void main(String args[]) { System.out.println(Suit.CLUBS); } } B. class EnumTest { public static void main(String args[]) { enum Num { ONE, TWO, THREE, FOUR } System.out.println(Num.ONE); } } C. class EnumTest { enum Colors { Red = 1, Green = 2, Blue = 4, Yellow = 8 } public static void main(String args[]) { System.out.println(Colors.Red); } } D. class EnumTest { enum Days { Sat, Sun, Mon, Tue, Wed, Thu, Fri } public static void main(String args[]) { System.out.println(days.Sat); }
7. QUESTION 05 Given: 1. class Variables { 2. int i; 3. String s; 4. Object o; 5. String g = null; 6. Integer y; 7. char c; 8. } Which four are object references? (Choose four.) A. i B. s C. o D. g E. y F. c
8. QUESTION 06 Which three are true? (Choose three.) A. An abstract class CANNOT be instantiated. B. An interface can extend multiple interfaces. C. All methods in an abstract class must be abstract. D. If abstract class B directly extends abstract class A, class B must implement all abstract methods declared in A. E. If concrete class C extends concrete class B, and B implements interface A, then all methods from interface A can be invoked on an instance of C.
9. QUESTION 07 Which two are true? (Choose two.) A. An abstract class can implement an interface. B. An abstract class can be extended by an interface. C. An interface can be extended by an abstract class. D. An interface CANNOT be extended by another interface. E. An abstract class can be extended by a concrete class. F. An abstract class CANNOT be extended by an abstract class.
10. QUESTION 08 Given: 1. abstract class A {} 2. class B {} 3. interface C {} 4. interface D {} 5. // insert code here Which, inserted at line 5, results in a compilation failure? A. class E extends A {} B. class E extends A, B {} C. class E implements C {} D. class E implements C, D {} E. interface E extends C, D {} F. class E extends B implements D {}
11. QUESTION 09 Which two are true about the relationship "A keyboard has 101 keys."? (Choose two.) A. This is a one-to-one relationship. B. This is a composition relationship. C. This is a one-to-many relationship. D. This is a many-to-many relationship. E. This is a not a composition relationship.
12. QUESTION 10 Exhibit: Which correctly implements the relationship shown in the diagram? A. class Cat { Dog d; } class Dog { Cat c; } B. class Cat { } class Dog { cat c; } C. class Cat { Dog d; } class Dog { } D. class Cat { } class Dog { }
13. QUESTION 11 You are asked to create a Dog class that exposes the Dog class String name and int breed to other code as read-only attributes, provides encapsulation, and adheres to the standard JavaBeans naming conventions. Which approach implements these requirements? A. Provide public getName()/setName() and public getBreed()/setBreed() methods in the Dog class, and mark the name and breed instance variables private. B. Provide private name() and private breed() methods in the Dog class, and mark the name and breed instance variables public. C. Provide public getName() and public getBreed() methods in the Dog class, and mark the name and breed instance variables private. D. Provide public name() and public breed() methods in the Dog class, and mark the name and breed instance variables private. E. Provide private getName() and private getBreed () methods in the Dog class, and mark the name and breed instance variables private.
14. QUESTION 12 Given: 1. class Exam { 2. private int num = 0; 3. public int getNum() { 4. return num; 5. } 6. } 7. public class Sample { 8. public static void main(String[] args) { 9. Exam e = new exam (); 10. e.num = 100; 11. int num = e.getNum(); 12. System.out.print1n("The number is: " + num); 13. } 14. } What is the result? A. Compilation fails. B. The number is: 0 C. The number is: 100 D. An exception is thrown at runtime.
15. QUESTION 13 Given: 1. public class Boat{ 2. // insert code here 3. public void setGas(int v){ 4. gas = v; 5. } 6. } Which, inserted at line 2, is valid and demonstrates encapsulation? A. struct int gas; B. public int gas; C. private int gas; D. protected int gas;
16. QUESTION 14 Given: 1. // insert code here 2. void play(); 3. void stop(); 4. } 5. // insert code here 6. public void play() { } 7. public void stop() { } 8. } Which, inserted at lines 1 and 5, allows the code to compile? A. 1. interface Player { 5. class DVDPlayer implements Player { B. 1. implements Player { 5. class DVDPlayer interface Player { C. 1. class Player { 5. interface DVDPlayer implements Player { D. 1. interface Player { 5. class DVDPlayer extends Player { E. 1. abstract class Player { 5. class DVDPlayer extends Player {
17. QUESTION 15 Given: 3. interface Pet { 4. void eat(); 5. } 6. class Dog implements Pet { public void eat() { } } 7. class Beagle extends Dog { public void eat() { } } Which demonstrates the "program to an interface" principle? A. class PetFood { public void go(Pet p) { p.eat(); } } B. class PetFood { public void go(Dog d) { d.eat(); } } C. class PetFood { public void go(Beagle b) { b.eat(); } } D. class PetFood extends Pet { public void go(PetFood d) { d.eat(); } } E. interface PetFood implements Pet { public void go(Pet d) { d.eat(); } }
19. QUESTION 01 Which four are primitive integer types in Java? (Choose four.) A. int B. byte C. long D. char E. float F. String G. Integer
20. QUESTION 02 Which two compile without error? (Choose two.) A. boolean b = 0; B. float f = 3.14; C. double d = 1000; D. char c = '0078';
21. QUESTION 03 Which three are legal ways to declare and initialize an instance variable? (Choose three.) A. static int x = 42; B. public int x = 'c'; C. public int x = null; D. public Integer f = null; E. static integer f = new integer (42); F. public integer f = new integer(42);
22. QUESTION 04 Which two are valid? (Choose two.) A. enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES } class EnumTest { public static void main(String args[]) { System.out.println(Suit.CLUBS); } } B. class EnumTest { public static void main(String args[]) { enum Num { ONE, TWO, THREE, FOUR } System.out.println(Num.ONE); } } C. class EnumTest { enum Colors { Red = 1, Green = 2, Blue = 4, Yellow = 8 } public static void main(String args[]) { System.out.println(Colors.Red); } } D. class EnumTest { enum Days { Sat, Sun, Mon, Tue, Wed, Thu, Fri } public static void main(String args[]) { System.out.println(days.Sat); }
23. QUESTION 05 Given: 1. class Variables { 2. int i; 3. String s; 4. Object o; 5. String g = null; 6. Integer y; 7. char c; 8. } Which four are object references? (Choose four.) A. i B. s C. o D. g E. y F. c
24. QUESTION 06 Which three are true? (Choose three.) A. An abstract class CANNOT be instantiated. B. An interface can extend multiple interfaces. C. All methods in an abstract class must be abstract. D. If abstract class B directly extends abstract class A, class B must implement all abstract methods declared in A. E. If concrete class C extends concrete class B, and B implements interface A, then all methods from interface A can be invoked on an instance of C.
25. QUESTION 07 Which two are true? (Choose two.) A. An abstract class can implement an interface. B. An abstract class can be extended by an interface. C. An interface can be extended by an abstract class. D. An interface CANNOT be extended by another interface. E. An abstract class can be extended by a concrete class. F. An abstract class CANNOT be extended by an abstract class.
26. QUESTION 08 Given: 1. abstract class A {} 2. class B {} 3. interface C {} 4. interface D {} 5. // insert code here Which, inserted at line 5, results in a compilation failure? A. class E extends A {} B. class E extends A, B {} C. class E implements C {} D. class E implements C, D {} E. interface E extends C, D {} F. class E extends B implements D {}
27. QUESTION 09 Which two are true about the relationship "A keyboard has 101 keys."? (Choose two.) A. This is a one-to-one relationship. B. This is a composition relationship. C. This is a one-to-many relationship. D. This is a many-to-many relationship. E. This is a not a composition relationship.
28. QUESTION 10 Exhibit: Which correctly implements the relationship shown in the diagram? A. class Cat { Dog d; } class Dog { Cat c; } B. class Cat { } class Dog { cat c; } C. class Cat { Dog d; } class Dog { } D. class Cat { } class Dog { }
29. QUESTION 11 You are asked to create a Dog class that exposes the Dog class String name and int breed to other code as read-only attributes, provides encapsulation, and adheres to the standard JavaBeans naming conventions. Which approach implements these requirements? A. Provide public getName()/setName() and public getBreed()/setBreed() methods in the Dog class, and mark the name and breed instance variables private. B. Provide private name() and private breed() methods in the Dog class, and mark the name and breed instance variables public. C. Provide public getName() and public getBreed() methods in the Dog class, and mark the name and breed instance variables private. D. Provide public name() and public breed() methods in the Dog class, and mark the name and breed instance variables private. E. Provide private getName() and private getBreed () methods in the Dog class, and mark the name and breed instance variables private.
30. QUESTION 12 Given: 1. class Exam { 2. private int num = 0; 3. public int getNum() { 4. return num; 5. } 6. } 7. public class Sample { 8. public static void main(String[] args) { 9. Exam e = new exam (); 10. e.num = 100; 11. int num = e.getNum(); 12. System.out.print1n("The number is: " + num); 13. } 14. } What is the result? A. Compilation fails. B. The number is: 0 C. The number is: 100 D. An exception is thrown at runtime.
31. QUESTION 13 Given: 1. public class Boat{ 2. // insert code here 3. public void setGas(int v){ 4. gas = v; 5. } 6. } Which, inserted at line 2, is valid and demonstrates encapsulation? A. struct int gas; B. public int gas; C. private int gas; D. protected int gas;
32. QUESTION 14 Given: 1. // insert code here 2. void play(); 3. void stop(); 4. } 5. // insert code here 6. public void play() { } 7. public void stop() { } 8. } Which, inserted at lines 1 and 5, allows the code to compile? A. 1. interface Player { 5. class DVDPlayer implements Player { B. 1. implements Player { 5. class DVDPlayer interface Player { C. 1. class Player { 5. interface DVDPlayer implements Player { D. 1. interface Player { 5. class DVDPlayer extends Player { E. 1. abstract class Player { 5. class DVDPlayer extends Player {
33. QUESTION 15 Given: 3. interface Pet { 4. void eat(); 5. } 6. class Dog implements Pet { public void eat() { } } 7. class Beagle extends Dog { public void eat() { } } Which demonstrates the "program to an interface" principle? A. class PetFood { public void go(Pet p) { p.eat(); } } B. class PetFood { public void go(Dog d) { d.eat(); } } C. class PetFood { public void go(Beagle b) { b.eat(); } } D. class PetFood extends Pet { public void go(PetFood d) { d.eat(); } } E. interface PetFood implements Pet { public void go(Pet d) { d.eat(); } }