Java interfaces - Study guides, Class notes & Summaries

What is JDBC API and when do we use it? - Java DataBase Connectivity API allows us to work with relational databases. JDBC API interfaces and classes are part of and package. We can use JDBC API to get the database connection, run SQL queries and stored procedures in the database server and process the results. JDBC API is written in a way to allow loose coupling between our Java program and actual JDBC drivers that makes our life easier in switching from one database to another datab...

OCA Java SE 8 Programmer certification Exam Questions & Answers 2023/2024 Package statement Import statements Comments Class declaration { Variables Comments Constructors Methods Nested classes Nested interfaces Enum } - ANSWER-Structure of a Java class public final class Runner extends Person implements Athlete {} - ANSWER-Components of a class declaration using an example - Per Java naming conventions, package names should all be in lowercase. - The package and su...

Prior to Java SE 8, Java supported three programming paradigms. Java SE 8 adds ________. a. procedural programming b. object-oriented programming c. generic programming d. functional programming. d. functional programming The new language and library capabilities that support functional programming were added to Java as part of Project ________. a. Utilitarian b. Upsilon c. Lambda d. Utility c. Lambda Which of the following statements is false? a. Prior to functional programming,...

SOLUTIONS MANUAL for Big Java_Early Objects, Enhanced eText 7th Edition Cay S. Horstmann (Complete 25 Chapters plus .java Solutions) TABLE OF CONTENT: 1 Introduction 2 Using Objects 3 Implementing Classes 4 Fundamental Data Types 5 Decisions 6 Loops 7 Arrays and Array Lists 8 designing classes 9 Inheritance 10 Interfaces 11 Input/Output and Exception Handling 12 Object-Oriented Design 13 Recursion 14 Sorting and Searching 15 The Java Collections Fr...

CPSC2150 Exam Guide Questions and CORRECT Answers Generics - CORRECT ANSWER- make interfaces and classes reusable by parameterizing them reference types - CORRECT ANSWER- Java demands that generic arguments must be wrapper type - CORRECT ANSWER- Each of the primitive types has a corresponding immutable - CORRECT ANSWER- Wrapper types are

Platform Independence: Write Once, Run Anywhere One of the main benefits of Java. This means that any code written with java only needs to be compiled once, rather than needing to be recompiled for different operating systems Verbose, Clear Syntax Used to tell the JVM which kind of information to see. The three verbose options supported by JVM are verbose: class, verbose: garbage collection, and verbose: Java Native Interface. Garbage collection, finalize An object is eligible for garbage ...

Test Driven Development (TDD) cons correct answers Only works with blackbox testing Coding to the test plan relies on having a great test plan What are we parameterizing with generics? correct answers A data type used somewhere in the class or interface (Ex. Lists) What is used as a stand in for data type using generics? correct answers T When is the actual type of a generic entry selected? correct answers When the client uses the type to declare or instantiate a variable. (as of java ...

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...

What is the difference between an Interface and an Abstract class? ~ "An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods." ...

Mission Control - CORRECT ANSWERS Managed customers can use this to access their clusters, check for system updates SaaS Updates - CORRECT ANSWERS SaaS updates are done automatically ActiveGate - CORRECT ANSWERS Proxy between OneAgent and a database, cloud, etc. ActiveGate use cases - CORRECT ANSWERS Access sealed networks Large memory dump storage Collecting large external logs AWS load distribution monitoring Monitoring using AG Virtualized infrastructure Monito...