Basics of Java Part 2

 


11.  Exception Handling :

    Exception handling in Java allows you to handle runtime errors gracefully. It involves try, catch, finally, and throw keywords.


12.  Packages :

    Packages are namespaces that organize classes and interfaces into a hierarchical structure. They help in organizing and managing large-scale Java applications.


13.  Modifiers :

    Modifiers are keywords that define the access levels, scope, and behavior of classes, methods, and variables. Examples include public, private, protected, static, etc.


14.  Constructors :

    Constructors are special methods used for initializing objects. They have the same name as the class and are called when an object is created.


15.  Methods Overloading and Overriding :

    Overloading is the ability to define multiple methods with the same name but different parameters in the same class. Overriding involves redefining a method in a subclass with the same signature as in the superclass.


16.  Interfaces :

    Interfaces in Java define a contract for classes to implement. They contain method signatures without any implementation and support multiple inheritance.


17.  Abstract Classes :

    Abstract classes are classes that cannot be instantiated on their own and may contain abstract methods (methods without a body). They are meant to be extended by subclasses.


18.  Java Virtual Machine (JVM) :

    JVM is the runtime environment in which Java bytecode is executed. It provides a platform-independent execution environment.


19.  Garbage Collection :

    Java's automatic memory management system that automatically deallocates memory when objects are no longer in use. Developers don't have to explicitly free memory as in languages like C++.


20.  Java Development Kit (JDK) :

    JDK is a software development kit used for developing Java applications. It includes the Java Runtime Environment (JRE), compiler, debugger, and other tools necessary for Java development.

Comments

Post a Comment

Popular posts from this blog

Basic Java Interview Questions

Image
21. Question: What is the purpose of the 'interface' keyword in Java?      Answer: The 'interface' keyword in Java is used to declare a collection of abstract methods that can be implemented by classes. It provides a way to achieve multiple inheritances and define a contract for implementing classes.   22. Question: How does the 'StringBuilder' class differ from 'StringBuffer' in Java?      Answer: Both 'StringBuilder' and 'StringBuffer' are used for string manipulation, but 'StringBuilder' is not synchronized, making it more efficient in a single-threaded environment, whereas 'StringBuffer' is synchronized, ensuring thread safety in a multi-threaded environment.   23. Question: What is the purpose of the 'transient' keyword in Java?      Answer: The 'transient' keyword in Java is used to indicate that a variable should not be serialized during object serialization. It is often used for sensitive informatio...
Read more

Cloud Computing Interview Questions

Image
1. **What is Cloud Computing?**    - *Answer:* Cloud Computing is a technology that allows users to access and use computing resources (such as servers, storage, databases, networking, software) over the internet instead of relying on local servers or personal devices. 2. **Explain the three service models in Cloud Computing.**    - *Answer:* The three service models are:      - Infrastructure as a Service (IaaS)      - Platform as a Service (PaaS)      - Software as a Service (SaaS) 3. **What are the key characteristics of Cloud Computing?**    - *Answer:* Key characteristics include on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. 4. **Can you differentiate between scalability and elasticity in the context of Cloud Computing?**    - *Answer:* Scalability refers to the ability to handle increasing workload, while elasticity specifically focuses on ...
Read more

Machine Learning Basic Interview Questions

Image
  Certainly! Here are 10 more machine learning interview questions along with their answers in regards to previous LinkedIn post: Certainly! Here are 10 more machine learning interview questions along with their answers: 21. Explain the concept of Support Vector Machines (SVM).     - Answer: Support Vector Machines are supervised learning models used for classification and regression tasks. SVM finds a hyperplane that best separates different classes by maximizing the margin between them. 22.   What is the purpose of the F1 score?       -  Answer:  The F1 score is the harmonic mean of precision and recall. It provides a balance between precision and recall, making it a useful metric when the class distribution is imbalanced. 23.   Describe the concept of Cross-Entropy in the context of Neural Networks.       -  Answer:  Cross-Entropy is a loss function used in neural networks for classificatio...
Read more