Java all in one - Study guides, Class notes & Summaries

ANDROID FINAL EXAM 2024 WITH 100% CORRECT ANSWERS On an Android device, the Java code is initially compiled to _________. - correct answer bytecode SQLite, WebKit, OpenGL ES, and SSL are all part of the _______ layer in the Android software stack. - correct answer Libraries The Java packages , ase, and l are all examples of Java-based libraries that are - correct answer wrappers for C++ libraries The Window Manager, Location Manager, and Notification Manager are all part of the ___...

What kind of error is in the following line:- int a = ((2*45)*(6/2) hello (4+90)); Lexical Error Semantic Error Correct! Syntactic Error None of the above - ️️What kind of error is in the following line:- int a = ((2*45)*(6/2) hello (4+90)); Lexical Error Semantic Error Syntactic Error None of the above The syntactic structure of imperative programming languages normally include which of the following units: operators keywords identifiers conditional statements loop statemen...

Package - ANSWERAll java classes are part of a package. 1) It must be the first statement in a class. 2) Classes and interfaces in the same package can use each other without prefixing their names with the package name. 3) To use a class or interface from another package must use a full, qualified name (unless imported). 4) Should be the first line of a class file unless preceded by a Comment 4) applies to all classes/interfaces in class file 5) lower case names 6) separated from subs by dot ...

Computer Science 221 Final Exam Questions And Answers To distribute your application to different platforms, how many Java versions do you need to create? - ANS one version Which one of the following statements is true? - ANS Java has a huge developer community Which method is the starting point of all Java programs? (Just type the name of the method) - ANS main Fill in the blank to declare a method called "hello()". void _______ - ANS hello() Make this text ...

CSE 205 Exam Questions With 100% Correct Answers If no visibility modifier is defined for a method, the method will be treated as public by default and it can be accessed by any other classes from anywhere. - answerFalse A wrapper class represents a particular primitive data type. In total there are 7 wrapper classes in Java, except the one for boolean data type. - answerFalse The purpose of inheritance is "code reuse". i.e. instead of repeating similar data/method definitions in severa...

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...

CSC 230 - Exam 1 Study Review Test. What do imperative languages do? - CORRECT ANSWER They focus on how a computation should be performed What is a procedural language? - CORRECT ANSWER One that focuses on the actions performed by a collection of procedures (functions) What is an object-oriented language? - CORRECT ANSWER One that is comprised of a collection of objects, which have both state and operations. Object-oriented languages focus on the state of the objects. What is the g...

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...

Object - An instance of a class Class - Blueprint/prototype from which objects are created Inheritance - subclasses can inherit states/behaviors of superclasses interface - contract between class and outside world; when a class implements an interface, it promises to provide the behavior published by that interface package - a namespace for organizing classes & interfaces in a logical manner; makes large software projects easier to manage Encapsulation - Hiding the internal state ...

How is Python implemented? correct answersPython is interpreted, similar to Java it is compiled into byte code and then executed by the Python VM. What are the two modes supported by Python? correct answersNormal Mode: entire .py files are read and compiled Interactive Mode: read-eval-print loop (REPL) executes statements piecewise. How is Python typed? correct answersPython is strongly, dynamically typed language. It is strongly typed since we cannot perform integer operations on a strin...