Java Find the Output Questions - Data Types

📘 Premium Read: Access my best content on Medium member-only articles — deep dives into Java, Spring Boot, Microservices, backend architecture, interview preparation, career advice, and industry-standard best practices.

✅ Some premium posts are free to read — no account needed. Follow me on Medium to stay updated and support my writing.

🎓 Top 10 Udemy Courses (Huge Discount): Explore My Udemy Courses — Learn through real-time, project-based development.

▶️ Subscribe to My YouTube Channel (172K+ subscribers): Java Guides on YouTube

Here are 10 Java code snippets designed to test your understanding of Java data types. Each question includes a code snippet and multiple-choice options for the output. After you complete the test, you can check your score, the correct answer, and an explanation.

1. What will be the output of the following Java code?

int a = 100;
int b = 200;
System.out.println(a + b);

a) 100200

b) 300

c) Compilation error

d) None of the above

2. What will be the output of the following Java code?

System.out.println(10 / 4);

a) 2

b) 2.5

c) 2.0

d) None of the above

3. What will be the output of the following Java code?

double num = 1.0 / 2.0;
System.out.println(num);

a) 0.5

b) 0

c) 1

d) 0.50

4. What will be the output of the following Java code?

char letter = 'A' + 1;
System.out.println(letter);

a) A

b) B

c) 66

d) None of the above

5. What will be the output of the following Java code?

System.out.println(11 % 6);

a) 5

b) 6

c) 1

d) 11

6. What will be the output of the following Java code?

boolean isJavaFun = true;
boolean isFishTasty = false;
System.out.println(isJavaFun && isFishTasty);

a) true

b) false

c) Compilation error

d) None of the above

7. What will be the output of the following Java code?

int x = 10;
int y = ++x;
System.out.println(x + ", " + y);

a) 10, 11

b) 11, 11

c) 11, 10

d) 10, 10

8. What will be the output of the following Java code?

byte b = 126;
b += 1;
b += 1;
System.out.println(b);

a) 128

b) -128

c) 127

d) -126

9. What will be the output of the following Java code?

double pi = 3.14159;
double radius = 10.0;
System.out.println(pi * radius * radius);

a) 314.159

b) 314.16

c) 315

d) 314

10. What will be the output of the following Java code?

System.out.println("1" + 2 + 3);

a) "123"

b) "6"

c) "15"

d) None of the above