Java Thread MCQ Questions and Answers for OCJP Preparation

Practice Java Thread MCQ questions and answers designed for OCJP certification preparation, technical interviews, and Java programming assessments. This free online quiz covers important multithreading concepts such as thread creation, thread lifecycle, synchronization, concurrency, Runnable interface, Thread class methods, and commonly asked Java Thread interview questions.

What Are Java Threads?

A thread is the smallest unit of execution within a Java application. Multithreading allows multiple tasks to run concurrently, helping applications improve responsiveness and utilize system resources efficiently.

Java provides built-in support for multithreading through the Thread class and Runnable interface. Developers use threads to perform background processing, parallel execution, asynchronous tasks, and high-performance application development.

This Java Thread MCQ quiz helps you practice commonly asked questions on thread lifecycle, synchronization, concurrency concepts, thread methods, and OCJP certification topics.



Java Online Mock OCJP Test Series: 1

Topic- Threads in Java

The test consists of 10 questions.

No negative marking for this test.

No Time limit

The pass percentage is 70%

The correct answer with a description will be displayed after the answer has been marked.

Submit the test to calculate your score once you are done with all the questions.

Complexity Level- Easy





Q1: Select the method that should be overridden to provide thread's behavior when Thread class is extended:















Q2: start() method is called to ______

Select the correct answer:













Q3: Threads in java share the same memory space and resources.

Select True or False:











Q4: Select the output of the below program:

public class threadExample extends Thread{
String msg;

threadExample(String s){
msg=s;
System.out.println("Hi");
}
public void run() {
System.out.println(msg);
}
public static void main(String[] args) {
threadExample obj1=new threadExample("hello");
threadExample obj2=new threadExample("world");
}
}













Q5: A syncronized method ______












Q6: A deadloack in Java is ____?

Select the correct answer:












Q7: When a currently running thread is moved to ready to run state just to give other high priority thread a chance to execute, then this process is called:












Q8: When a currently running thread executes for a fixed length of time and then moved to ready to run state, this process is called ________












Q9: Call to Thread.yield() method will____

Select the correct answer:














Q 10: Select all the correct non-runnable states of a thread:

































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Frequently Asked Questions (FAQs)

What is a Java Thread?

A Java Thread is an independent path of execution within a program. Multiple threads can run concurrently, allowing applications to perform several tasks at the same time.

Why are Java Thread questions important for interviews?

Multithreading is a frequently tested topic in Java interviews because it is widely used in enterprise applications, backend systems, and concurrent programming scenarios.

Does this quiz cover Java multithreading concepts?

Yes. The quiz covers thread creation, thread lifecycle, synchronization, Runnable interface, Thread class methods, concurrency concepts, and common thread-related interview questions.

Are Java Thread MCQs useful for OCJP certification preparation?

Yes. Thread and multithreading concepts are commonly included in Java certification exams, making these practice questions useful for OCJP preparation.

Can beginners attempt this Java Thread quiz?

Yes. Beginners can use these questions to understand Java multithreading fundamentals, while experienced developers can use them for revision and interview preparation.