what are the important questions in java?
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['Q1. Explain JDK, JRE and JVM?', 'Q2. Explain public static void main(String args[]) in Java.', 'Q3. Why Java is platform independent?', 'Q4. Why Java is not 100% Object-oriented?', 'Q5. What are wrapper classes in Java?', 'Q6. What are constructors in Java?', 'Q7. ... ', 'Q8.']
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['Q1. What is a pseudo-class? ... ', 'Q2. What is Namespacing in JavaScript? ... ', 'Q3. How can you reduce page loading time? ... ', 'Q4. What is CORS? ... ', 'Q5. What are the advantages of HTTP 2.0 over HTTP 1.1? ... ', "Q6. How do you take into account SEO, maintainability, UX, performance, and security when you're building a web application? ... ", 'Q7. ... ', 'Q8.']
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JDK is a superset of JRE, and contains everything that is in JRE, plus tools such as the compilers and debuggers necessary for developing applets and applications. JRE provides the libraries, the Java Virtual Machine (JVM), and other components to run applets and applications written in the Java programming language.
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['What is PHP? ... ', 'What types of loops exist in PHP? ... ', 'How do you display the output directly to the browser? ... ', 'Describe which programming language does PHP parallel to? ... ', 'How to create a MySQL connection? ... ', 'How to select a database? ... ', 'What is PEAR?']
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['the body() , the code inside the function.', 'the formals() , the list of arguments which controls how you can call the function.', "the environment() , the “map” of the location of the function's variables."]
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Simple: Java was designed to be easy to use, write, compile, debug, and learn than other programming languages. Java is much simpler than C++ because Java uses automatic memory allocation and garbage collection.
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['Primitive data types: The primitive data types include boolean, char, byte, short, int, long, float and double.', 'Non-primitive data types: The non-primitive data types include Classes, Interfaces, and Arrays.']
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['public class DoWhileExample2 {', 'public static void main(String[] args) {', 'do{', 'System. out. println("infinitive do while loop");', '}while(true);', '}', '}']
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['The name of the function.', 'Required parameters and their types.', 'Optional parameters (in square brackets, []), their types, and default values.', 'The return type of the function (after the final colon, :)']
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['What are the best practices to follow while writing a use case? ... ', 'What is the difference between exception flow and alternate flow? ... ', 'Do you think a business analyst should be involved in testing? ... ', 'What does INVEST stand for? ... ', 'What is Pareto Analysis?']
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['Java Platform, Standard Edition (Java SE)', 'Java Platform, Enterprise Edition (Java EE)', 'Java Platform, Micro Edition (Java ME)', 'JavaFX.']
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Top 6 Data Structures Every Java Programmer Should Learn. Java API provides built-in support for common data structures, essential for writing programs like an array, linked list, map, set, stack, and queue. ... Array, linked list, Stack, Queue, Map, Set, and How they are implemented in Java, along with how to use them.
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['What is a pointer on pointer? ... ', 'Distinguish between malloc() & calloc() memory allocation. ... ', 'What is keyword auto for? ... ', 'What are the valid places for the keyword break to appear. ... ', 'Explain the syntax for for loop. ... ', 'What is difference between including the header file with-in angular braces < > and double quotes “ “']
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Advantages of Java: Simple: Java was designed to be easy to use, write, compile, debug, and learn than other programming languages. Java is much simpler than C++ because Java uses automatic memory allocation and garbage collection. Object-Oriented: Allows you to create modular programs and reusable code.
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['Pattern questions.', 'Loop based questions.', 'Removal of vowel from string.', 'GCD programs.', 'Print and count all the numbers which are less than a given key element from a given array.', 'Find prime numbers upto n numbers.', 'Eliminate repeated letters in Array.', 'String reversal.']
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['Q #1) What is Android? ... ', 'Q #2) What is the Android SDK? ... ', 'Q #3) What are the different versions of Android OS that you remember? ... ', 'Q #4) What is the difference between Mobile Application Testing and Mobile Testing? ... ', 'Q #5) Name the languages supported for Android development.']
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jdk is necessary to compile to code and convert java code to byte codes while jre is necessary for executing the byte codes. JDK includes the JRE plus command-line development tools such as compilers and debuggers that are necessary or useful for developing applets and applications.