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ICSE Class IX Notes 2019 : Computer Applications

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Omkar mantri
Vibgyor High School, Haralur Road, Bangalore

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COMPUTER NOTES 1. Important Questions Question What are principles of OOP s? Name any four principles/ define any two principles Define Inheritance/ Polymorphism/ Encapsulation/ Abstraction (You can get more marks by highlighting the key points) Define Class/ Object Write two types of Java Programming (Ans: Standalone, Application) Why is Java termed as a platform? (Ans: Platform is the environment in which programs execute. Instead of directly interacting with the OS, java runs on a JVM) Write any 2 features of Java ! Define WORA/ WORM (Board Exam Question) Difference between Interpreter and Compiler What are the types of comments ! Define Package What is Java Character set? Define Unicode Define Datatypes (or different types of datatypes) (Board Exam Question) What is the size in bits/bytes (Board Exam Question) Default Value of Datatypes (Board Exam Question) What is type casting? ! What is implicit/ explicit? Difference between Print and Println What are the types of Unary Operators? (Ans: Prefix & Postfix) Example if p=5, find d=++p + 5 (Such type of questions can come) (Board Exam Question) Differentiate between Constructors and Functions (Board Exam Question) What package is called automatically in the Java Program? What all classes does it contain? Define / Give Syntax/ What package is used for- Buffered Reader and Scanner Class Define non-parametrised constructor Conversion of Math Expression into Java Expression Marks 2 4 2 m/ per 2 2 2 2 2 2 2 2 2 (No idea) 2 1/per 1/per 2 2 2 2 2 2 2 2 2 2

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