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class 8 computer chapter 5

1. Java Keyword 👉 Definition: Keywords are reserved words in Java that have special meaning to the compiler. They cannot be used as identifiers (like variable names). 👉 Example: class , public , static , void , int , if , else public class Example { public static void main(String[] args) { int number = 10; // 'int' is a keyword if(number > 5) { // 'if' is a keyword System.out.println("Number is greater than 5"); } } } 2. Java Token 👉 Definition: A token is the smallest unit in a Java program. 👉 Types of Tokens: Keywords Identifiers Literals (numbers, characters, strings) Operators ( + , - , * , / ) Separators ( ; , {} , () ) 👉 Example: int a = 10; // Tokens: int, a, =, 10, ; 3. Java Data Types 👉 Definition: Data types define the type of data a variable can store. Two categories: Primitive Data Types (8 types) byte → 1 byte (e.g. byte b = 100; ) short → 2 bytes (e.g...
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CLASS 8 COMPUTER

  Questions & Answers 1. A step-by-step procedure to solve a particular problem. Answer: b. Algorithm Explanation: An algorithm is a set of ordered steps or instructions designed to perform a specific task or solve a problem. Flowcharts and programs are based on algorithms. 2. Pictorial representation of steps to solve a specific problem. Answer: d. Flowchart Explanation: A flowchart uses symbols and arrows to represent the sequence of steps visually, making it easier to understand the process. 3. A shape used to connect different shapes in a flowchart. Answer: a. Arrow Explanation: Arrows indicate the flow of control or sequence between steps in a flowchart. 4. A rounded shape in a flowchart is used to show the: Answer: d. Start and Stop Explanation: Ovals (or terminals) in flowcharts represent the starting and ending points of the process. Part A: MCQ Q5. Which of the following is true about pseudocode? Options: a. It...
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10TH QUESTION

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  Section A Question 1 (a) Define the term Bytecode. Answer Java compiler converts Java source code into an intermediate binary code called Bytecode. Bytecode can't be executed directly on the processor. It needs to be converted into Machine Code first. (b) What do you understand by type conversion? How is implicit conversion different from explicit conversion? Answer The process of converting one predefined type into another is called type conversion. In an implicit conversion, the result of a mixed mode expression is obtained in the higher most data type of the variables without any intervention by the user. For example: int a = 10; float b = 25.5f, c; c = a + b; In case of explicit type conversion, the data gets converted to a type as specified by the programmer. For example: int a = 10; double b = 25.5; float c = (float)(a + b); (c) Name two jump statements and their use. Answer break statement, it is used to jump out of a switch statement or a...
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