ECET 2026 Java – Introduction & Setup | Day 1 Night | CSE Diploma

Introduction

Welcome to Day 1 – Night Session of your ECET 2026 CSE preparation journey! Java is one of the most powerful and widely-used programming languages in the world. As per the C-23 curriculum, understanding the basics of Java and its setup environment is crucial for scoring well in the Computer Science section of ECET. This session gives you a simple yet solid start with key concepts and 10 expected MCQs for practice.

📘 Concept Notes: Java – Introduction & Setup

🌟 What is Java?

Java is a high-level, object-oriented programming language developed by Sun Microsystems (now owned by Oracle). It is known for its platform independence due to the Java Virtual Machine (JVM).

Key Features of Java:

• 🟢 Object-Oriented – Everything is treated as an object.
• 🔁 Platform Independent – “Write Once, Run Anywhere” using JVM.
• 🔒 Secure – Built-in security features like bytecode verification and sandboxing.
• ⚙️ Robust & Portable – Strong memory management and error handling.
• ⚡ Multithreaded & Dynamic – Efficient use of system resources.

🛠️ Java Setup Process

To write and run Java programs, you need the following components installed:

1️⃣ JDK (Java Development Kit)

• It includes JRE + Development Tools (compiler javac, debugger, etc.).

2️⃣ JRE (Java Runtime Environment)

• It allows you to run Java applications using JVM.

3️⃣ IDE (Integrated Development Environment) – Optional but helpful

• Examples: Eclipse, IntelliJ IDEA, NetBeans

✅ Setup Steps (Windows):

1. Download JDK from Oracle’s Official Site
2. Install it and set environment variable JAVA_HOME.
3. Add JDK’s /bin path to the System Path.
4. Open CMD and run java -version and javac -version to verify installation.

🔟 10 Expected MCQs – Java Introduction & Setup (ECET 2026)

Level: Easy to Moderate | Target: CSE Diploma Students

1. Java was initially developed by:
A. Microsoft
B. Oracle
C. Sun Microsystems
D. IBM

2. The full form of JDK is:
A. Java Deployment Kit
B. Java Development Kit
C. Java Data Kit
D. Java Default Kit

3. Which of the following is platform-independent?
A. C
B. Java
C. Python
D. Assembly

4. JVM stands for:
A. Java Variable Method
B. Java Virtual Machine
C. Java Visual Mode
D. Java Verified Model

5. Java programs are compiled into:
A. Assembly Code
B. Executable File
C. Bytecode
D. Machine Code

6. The tool used to compile Java code is:
A. javac
B. java
C. javadoc
D. jvm

7. The command to check Java version in CMD is:
A. java_check
B. java-version
C. java -v
D. java -version

8. IDE stands for:
A. Integrated Data Environment
B. Integrated Development Environment
C. Internal Development Environment
D. International Development Environment

9. JRE is required to:
A. Write Java programs
B. Compile Java code
C. Run Java applications
D. Debug Java code

10. To set up Java on Windows, which environment variable should be configured?
A. JAVA_DEV
B. JAVA_HOME
C. JAVA_PATH
D. JAVA_VAR

✅ Answer Key Table

Q.No	Answer
1	C
2	B
3	B
4	B
5	C
6	A
7	D
8	B
9	C
10	B

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🧠 Answer Explanations

1. C – Sun Microsystems: Java was created by James Gosling at Sun Microsystems in 1995.
2. B – Java Development Kit: JDK includes the tools needed to develop Java programs.
3. B – Java: It runs on JVM, making it platform-independent.
4. B – Java Virtual Machine: JVM is the engine that runs Java bytecode.
5. C – Bytecode: Java compiler converts source code into bytecode.
6. A – javac: The Java compiler tool is javac.
7. D – java -version: This command shows the installed Java version.
8. B – Integrated Development Environment: IDEs help in coding and debugging easily.
9. C – Run Java applications: JRE is required for executing Java programs.
10. B – JAVA_HOME: This environment variable points to the JDK installation directory.

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🎯 Why This Practice Matters

Practicing topic-based MCQs like this helps you:

• 🧠 Strengthen fundamental concepts
• 🕒 Save time in the ECET exam by recognizing quick answers
• 🎯 Improve accuracy through real-time testing
• 🔄 Align perfectly with the C-23 ECET curriculum pattern

👉 Regular sessions like this will boost your ECET 2026 rank and build strong conceptual confidence.

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