What are thread groups?Java experienced interview question/Java Interview Questions and Answers for Freshers & Experienced

What are thread groups?

Thread Groups are a group of threads and other thread groups. It is a way of grouping threads so that
actions can be performed on a set of threads for easy maintenance and security purposes.

Posted Date:- 2021-08-18 01:16:30

Compare the sleep() and wait() methods in Java

What is reflection and why is it useful?

What is JDBC?

What is Application Context?

What does System.gc() and Runtime.gc() methods do?

What is Spring?

What is JVM? Why is Java called the “Platform Independent Programming Language”?

Find all substrings of String in java?

How to check if two Strings are anagram in java?

How to reverse a String in java? Can you write a program without using any java inbuilt methods?

How objects of a class are created if no constructor is defined in the class?

What's the purpose of using Break in each case of Switch Statement?

Why Strings in Java are called as Immutable?

When the constructor of a class is invoked?

State some situations where exceptions may arise in java?

Can an Interface extend another Interface?

What are the restriction imposed on a static method or a static block of code?

Which method is used to create the daemon thread?

What is daemon thread?

Why String is declared final or immutable in java?

Write a Java Program to iterate ArrayList using for-loop, while-loop, and advance for-loop.

What access modifiers can be used for class?

Explain where variables are created in memory?

In how many ways we can do exception handling in java?

In how many ways we can do synchronization in java?

Can we use catch statement for checked exceptions?

What is synchronization and why is it important?

How to sort a collection of custom Objects in Java?

. Difference between ‘IS-A’ and ‘HAS-A’ relationship in java?

What are thread groups?

What is Nested top-level class?

Which class represents the socket that both the client and server use to communicate with each
other?

What is currentThread?

Can we have a try block without catch block?

What value does read Line() return when it has reached the end of a file?

Does garbage collection guarantee that a program will not run out of memory?

What are the wrapped, classes?

What is the catch or declare rule for method declarations?

How many objects will be created below:

What is marker interface in java? Can you provide some examples of marker interface?

What is Java ClassPath?

How can we pass argument to a function by reference instead of pass by value?

What's the difference between the methods sleep and wait?

What is the difference between a Window and a Frame?

How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters?

What is a WAR file?

What is the preferred size of a component?

What is the difference between preemptive scheduling and time slicing?

What is a transient variable?

Explain about anonymous inner classes in java?

Explain method overloading?

What is the right data type to represent a price in Java?

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