Alina Schellig

9. Juni 2022

Java Interview Questions and Answers 2023 Updated

Filed under: Education — admin @ 19:41

Runtime exceptions are not checked exceptions, which means that you are not required to handle them explicitly in your code. Non-tracing garbage collectors work by dividing memory into regions and periodically reclaiming unused regions. One common type of non-tracing garbage collector is the generational garbage collector. Java is also similar to C and C++ but is simpler and enforces an object-oriented programming model. People use Java for applications that can run on a single computer or can be spread amongst servers.

A Stream represents an input source or an output destination, which could be a file, an i/o device, another program, etc. FileInputStream in Java is used to read data from a file as a stream of bytes. It is mostly used for reading binary data such as images, audio files, or serialized objects. All the stream classes can be divided into two types of classes that are ByteStream classes and CharacterStream Classes. The ByteStream classes are further divided into InputStream classes and OutputStream classes. CharacterStream classes are also divided into Reader classes and Writer classes.

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What is the purpose of the not-sr-only class in Tailwind CSS? This class accepts lots of value in tailwind CSS in which all the properties are covered in class form. This class is used to improving accessibility with screen readers. The calc() is a built-in function java 7 certifications in CSS that enables you to carry out mathematical computations. You can use the calc() function in Tailwind CSS to dynamically determine values for different CSS properties. You can use the “calc()” statement just by wrapping it inside square brackets.

  • Write a Java program to rotate arrays 90 degrees clockwise by taking matrices from user input.
  • Multiple inheritance is not supported by the Abstract class.
  • Now, we can write the program for computing the nth term of the Fibonacci series as follows.
  • In contrast to Reader/Writer classes, which accept character arrays as parameters, input/output stream class methods accept byte arrays.
  • In Java, Collection interface (java.util.Collection) and Map interface (java.util.Map) are the two main “root” interfaces of Java collection classes.
  • The operating system divides the CPU time that is available when numerous threads are running on a single CPU into small time slices and gives each thread a time slice to execute.

Dynamic method dispatch is a resolving mechanism for method overriding during the run time. Method overriding is the one where the method in a subclass has the same name, parameters, and return type as a method in the superclass. A component of the object-oriented notion known as multiple inheritances allows a class to inherit properties from many parent classes.

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Props are objects which can be used inside a component. After creation, if we try to add more than documents to their capacity, it overwrites the existing documents. Sharding is a very important concept that helps the system to keep data in different resources according to the sharding process.

  • From Java 7 onwards, you can also catch multiple exceptions in a single catch block, as shown in the following example.
  • When a class is declared as final in Java, it can’t be extended by any subclass class but it can extend other class.
  • In general all the JavaScript functions have a default value of undefined but we can overwrite it by specifying a particular value.
  • It is flexible and safe in comparison to JSONP (JSON with Padding).
  • Multithreaded programs in Java contain threads that run concurrently instead of running sequentially.

It uses less memory as every single node has only one pointer. Traversal in a singly linked list is possible in only a forward direction. The map allows a single null key at most and any number of null values. Thread has Parents’ PCB, its https://remotemode.net/ own Thread Control Block, and Stack and common Address space. A FailFast iterator is an iterator that throws a ConcurrentModificationException if it detects that the underlying collection has been modified while the iterator is being used.

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