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Viva Questions - Class 8 - Programming

Rumman Ansari July 20, 2026 9 views Subject Details

VIVA QUESTIONS — CLASS 8

Viva Questions — Programming (Java & BlueJ)

Be Confident, Be Prepared, Shine in Your Viva! This complete guide contains 20 essential Viva Questions and Answers for your Programming oral exam. Read carefully, practice speaking aloud, give examples, and you'll ace your viva!

Introduction

A Viva Voce is an oral examination where your teacher tests your understanding through spoken questions. Programming viva covers Java basics — variables, data types, operators, input/output, and BlueJ IDE.

Key to Success: Understand concepts — don't just memorize! When you truly understand, you can answer any question with confidence.

Motivational Tip

Your viva is a friendly conversation about programming. You've written programs, you know Java — now just speak it out! Take a deep breath, smile, and show what you've learned.

What is Programming?

Programming is the process of writing instructions in a language that a computer can understand and execute to perform tasks.

PROGRAMMING FLOW

Programmer → Code → Computer → Output

Key Points to Remember

Essentials

✅ Java is a programming language.
✅ BlueJ is an IDE for Java beginners.
✅ Variables store values.
✅ Data types define variable type.
✅ Operators perform operations.
✅ Scanner for input, println for output.
✅ Compilation converts code to bytecode.
✅ Programs solve real problems.

20 Viva Questions and Answers

Question 1

What is programming?

Fundamental Question

Answer: Programming is the process of writing instructions in a programming language that a computer can understand and execute to perform a task.

Question 2

What is Java?

Language Question

Answer: Java is a high-level, object-oriented programming language used to develop applications for computers, smartphones, and web.

Question 3

Who invented Java?

General Knowledge

Answer: Java was invented by James Gosling in 1995 at Sun Microsystems.

Question 4

What is BlueJ?

Tool Question

Answer: BlueJ is an Integrated Development Environment (IDE) designed specifically for teaching Java programming to beginners.

Question 5

What is IDE?

Abbreviation Question

Answer: IDE stands for Integrated Development Environment — a software that provides tools like editor, compiler, and debugger to write and run programs.

Question 6

What is a variable?

Definition Question

Answer: A variable is a named storage location in memory that holds a value which can be changed during program execution.

Example: int age = 15;

Question 7

Name any 5 data types in Java.

Naming Question

Answer:

int — whole numbers
double — decimal numbers
char — single character
String — text
boolean — true or false

Question 8

What is int data type?

Data Type Question

Answer: int stores whole numbers (integers) like 5, -10, 100, 2500.

Example: int age = 15;

Question 9

What is double data type?

Data Type Question

Answer: double stores decimal numbers (numbers with fractional part) like 3.14, 99.99.

Example: double price = 99.99;

Question 10

What is boolean data type?

Data Type Question

Answer: boolean stores only two values: true or false.

Example: boolean isPass = true;

Question 11

What is an operator?

Concept Question

Answer: An operator is a symbol that performs an operation on one or more values (called operands).

Example: +, -, *, /

Question 12

Name the arithmetic operators.

Naming Question

Answer:

+ — Addition
- — Subtraction
* — Multiplication
/ — Division
% — Modulo (remainder)

Question 13

What is the difference between = and ==?

Comparison Question

Answer:

= is assignment — assigns a value.
== is comparison — checks if two values are equal.

Question 14

What is % operator?

Operator Question

Answer: The % (modulo) operator gives the remainder after division.

Example: 10 % 3 = 1 (because 10 ÷ 3 = 3 remainder 1)

Question 15

What is Scanner in Java?

Input Question

Answer: Scanner is a built-in class in Java used to take input from the user.

Import: import java.util.Scanner;
Usage: Scanner sc = new Scanner(System.in);

Question 16

How do we print output in Java?

Output Question

Answer: We use System.out.println() to print output to the console.

Example: System.out.println("Hello, World!");

Question 17

What is compilation?

Concept Question

Answer: Compilation is the process of converting source code (Java code) into bytecode (machine-readable language) so the computer can execute it.

Question 18

What is an identifier?

Concept Question

Answer: An identifier is a name given to a variable, class, method, or object in a program.

Examples: studentName, HelloWorld, calculateSum

Question 19

What are the rules for naming identifiers?

Rules Question

Answer:

Must start with a letter, _, or $.
Cannot start with a number.
Cannot contain spaces or special characters (except _ and $).
Cannot be a Java keyword (like int, class).
Case-sensitive (name and Name are different).

Question 20

What is the basic structure of a Java program?

Structure Question

Answer: A Java program has:

A class declaration
A main() method
Statements inside main

public class ClassName {
    public static void main(String[] args) {
        // statements
    }
}

Quick Code Examples

Example 1: Hello World Program

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Example 2: Add Two Numbers

import java.util.Scanner;

public class AddNumbers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter first number: ");
        int a = sc.nextInt();
        System.out.print("Enter second number: ");
        int b = sc.nextInt();
        int sum = a + b;
        System.out.println("Sum = " + sum);
    }
}

Example 3: Variables and Data Types

int age = 15;
double marks = 95.5;
char grade = 'A';
String name = "Ravi";
boolean isPass = true;

System.out.println("Name: " + name);
System.out.println("Age: " + age);
System.out.println("Marks: " + marks);
System.out.println("Grade: " + grade);
System.out.println("Passed: " + isPass);

Viva Preparation Tips

Before the Viva

📖 Understand concepts, don't just memorize.
🎤 Practice speaking answers aloud.
💬 Give examples for each concept.
💻 Show sample code when asked.
😊 Be confident and smile.
🙋 Ask if you don't understand.
🙏 Thank the teacher after viva.
📚 Review your practical activities.
🖥️ Recall your BlueJ programs.
💪 Believe in yourself!

During the Viva

Confidence Tips

😊 Smile and greet politely.
👂 Listen to the full question.
💭 Take a moment to think.
🎤 Speak clearly and confidently.
👀 Maintain eye contact.
🎯 Give short, focused answers.
💻 Give code examples when possible.
🙏 Say "I'm not sure" if unsure — don't guess wildly.
💪 Stay calm if you make a mistake.
🙌 Thank the teacher at the end.

Common Mistakes to Avoid

Don't Do These!

❌ Missing semicolons in code examples.
❌ Wrong case in Java (System vs system).
❌ Not knowing the difference between = and ==.
❌ Forgetting to import Scanner.
❌ Confusing print with println.
❌ Not giving examples.
❌ Being too nervous.
❌ Guessing wildly when unsure.

Bonus Viva Questions

Extra Practice

Q. What is JVM? → Java Virtual Machine — runs Java bytecode.
Q. What is JDK? → Java Development Kit — tools for developing Java.
Q. What is JRE? → Java Runtime Environment — required to run Java.
Q. What is bytecode? → Intermediate code produced after compilation.
Q. What is a class? → A blueprint for creating objects.
Q. What is a method? → A block of code that performs a task.
Q. What is main() method? → The entry point of a Java program.
Q. What are keywords? → Reserved words with special meaning (like int, class).
Q. What are comments? → Notes in code that are ignored by compiler.
Q. Types of comments? → Single-line (//), Multi-line (/* */).

Did You Know?

Fun Fact

Java runs on over 3 billion devices worldwide! From your smartphone to smart TVs, from banking systems to space exploration software — Java is everywhere. It was named after Java coffee, and that's why its logo is a coffee cup!

Sample Viva Conversation

Example Scenario

Teacher: "Good morning! What is programming?"

You: "Good morning, ma'am. Programming is the process of writing instructions in a programming language that a computer can understand and execute."

Teacher: "Very good. Can you name a programming language?"

You: "Yes, ma'am. Java is a popular programming language. We are learning it in BlueJ IDE."

Teacher: "What is a variable in Java?"

You: "A variable is a named storage location in memory that holds a value. For example, int age = 15; — here age is the variable that stores 15."

Teacher: "Excellent! What data types do you know?"

You: "int for whole numbers, double for decimals, char for single characters, String for text, and boolean for true/false."

Teacher: "Well done!"

FAQs About Viva

Q1. How long is the viva?

Usually 5-15 minutes per student, covering key concepts.

Q2. What if I don't know an answer?

Say politely: "I'm not sure, ma'am/sir" — better than guessing wildly.

Q3. Should I memorize code?

Understand the logic. Practice writing simple examples like Hello World and Add Two Numbers.

Q4. Can I show code on paper?

Only if teacher asks or provides paper. Otherwise, explain verbally with syntax.

Q5. Should I explain step-by-step?

Yes! Explaining shows understanding. Break down complex answers.

Q6. What if I forget the exact term?

Describe it in your own words. Teachers appreciate understanding.

Q7. How do I overcome nervousness?

Deep breaths, practice with friends, remember you know this stuff!

Q8. What if I make a mistake?

Correct yourself politely: "Actually, I think it's..." — shows self-awareness.

Key Takeaways

Java is a programming language.
BlueJ is Java IDE for beginners.
Variables store values.
Data types: int, double, char, String, boolean.
Operators: arithmetic (+ - * / %), assignment (=).
Scanner for input; System.out.println for output.
Compilation converts code to bytecode.
Class names start with uppercase.
Understand concepts, don't just memorize.
Be confident, give examples, smile!

Key Takeaway

Prepare well, be confident, and speak clearly! You will shine in your viva!

Programming is a valuable skill in today's digital world. Your Java viva is a chance to show what you've learned. Answer confidently, give examples, and enjoy the conversation!

Remember: Learn Today, Lead Tomorrow! Practice Makes Perfect! 🌟

⭐ CODE SMART, THINK CLEAR, WRITE BETTER! ⭐

Best of Luck! Take a deep breath. Smile. Answer confidently. You will do great! 👍😊

Flowchart → Visual Thinking → Smart Solutions → Better Results! 🚀

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