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Java / Java Multithreading

What is Thread Group in Java?

ThreadGroup is a class that provides information about a thread group. It helps to get the list of active threads in a thread group and to set the uncaught exception handler for the thread.

Ever since setUncaughtExceptionHandler (UncaughtExceptionHandler e) was added in Java 1.5, it serves the purpose to set exception handler and ThreadGroup becomes obsolete and no longer used.

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Multitasking. Multiprogramming/Multiprocessing. Basic units of execution in concurrent programming. Is concurrency possible on simple single processor systems without multiple processors? Define Processes. Define Threads. What is the default thread of every Java application? Thread Objects. When does Thread Interference occur? How do you create a Thread? Which approach is recommended? Does Thread class implements Runnable? What is the signature of Thread run() method? Define synchronization. Can a thread be interrupted when it is in sleep? Does sleep() method throws any Exception? Can the start method be called twice on the same Thread? (OR) Can the start() method invoked again on the same thread object after start() been called first time? Why do we call Thread.start() method which in turns calls run method? Consumer Producer problem. Difference between Thread.interrupted() and Thread.isInterrupted(). Give few example from Java API that throws InterruptedException. Thread.sleep method() Best practice for "DO Nothing" Strategy for InterruptedException. How do you interrupt an thread that does not call any method that throws InterruptedException? join() method. is join() a overloaded method? Interrupts An example for join(long milliseconds). How do you interrupt an thread that does not call any method that throws InterruptedException? Explain the interrupt mechanism. Can run() method throw exception? Difference between sleep and wait method in Java. Is ++ (increment) operator thread-safe in Java? What is thread starvation? Does pressing Control-C causes InterruptedException in Java? What is livelock in multithreading? Explain race condition in multithreading. What causes starvation in threads? Difference between deadlock and livelock in Java multithreading. What is Slipped Condition in multithreading? What is Intrinsic Lock in Java multithreading? Explain Guarded Blocks in Java. What is BLOCKED state of a thread? Different states of a Java thread. 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Java Multithreading part II

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OOPS Concepts and its implementation in Java 19 Inheritance 29 Java Identifiers 4 JDK, JRE, JVM, JIT 69 Object, Class and Package 44 Variable 9 Local Variables 6 Instance Variables (Non Static Variables) 3 Class Variables (Static Variables) 13 Package 10 Operators 9 Modifiers 29 Data types 10 Methods 39 Access Modifiers 5 Control Statements 14 Constructor 38 Interface 46 Abstract Class 19 Enum 20 Arrays 20 Strings 32 Using String 29 Exception 55 Collections 56 List and its implementations 22 Map and its implementations 39 Set and its implementations 23 Queue and its implementations 4 Regular expressions 3 Design Patterns 75 Generics 20 Casting 5 volatile 13 Java ThreadLocal 10 Java Multithreading 113 Java Multithreading part II 18 final keyword 13 static keyword 16 Java Transactions (JTA) 21 Concurrent collections 55 Java Serialization 36 JDBC 53 JNDI 17 RMI 6 JAXB 10 JMS 45 Servlet Interview Questions 16 JMX 9 log4j 18 Annotations 10 XML 14 Garbage collection 31 Programs 8 JVM 4 Java8 streams 32 JavaFX 6 Autosys Interview questions 21 The Java Virtual Machine: How and What Is It Used For? Java 11 10 Java 12 5 Top Errors You Should Avoid when Studying Programming Java 17 1 JPMS 6 Java Record Keyword 4 MapStruct Java Interview questions

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