Where are string objects stored in Java?
String objects in Java are typically stored in the Java heap, which is the same region of memory that objects are stored in. The Java heap is allocated from the main memory of the computer and is managed by the Java Garbage Collector.
Date:2023-01-14
Can JavaScript for in loop over an array?
Yes, JavaScript's for-in loop can loop over the array elements. Here is an example of using a for-in loop to iterate over an array:
let arr = [1, 2, 3];
for (let num in arr) {
console.log(arr[num]);
}
// Output:
1
2
3
Date:2023-01-14
What are the different types of scopes in JavaScript?
There are three main scopes in JavaScript:
1) Global Scope: Variables declared outside of any function belong to the global scope, and their values can be accessed and modified from anywhere within the code.
2) Function Scope: Variables declared inside a function belong to the local scope of that function and can only be accessed and modified from inside that function.
3) Block Scope: Variables declared with the let or const keywords (known as "block-scoped variables") are confined within the block in which they were declared (i.e. within curly braces). They cannot be accessed or modified outside of this block.
Date:2023-01-07
What are the deployment configuration properties in Java Web Start?
1. Codebase: The URL where Java Web Start applications are located on the web server
2. Check: The frequency of checking the server for new versions of the application
3. Part: The Java archive files that comprise the application
4. Vendor: A URL or e-mail address for the person or organization who supplied the application
5. J2SE Version: The minimum version of the Java Runtime Environment required to use the application
6. Initial Heap Size: The amount of memory allocated to the JVM
7. Maximum Heap Size: The maximum amount of memory allocated to the JVM
8. Runtime Parameters: Extra command line parameters for the JVM, such as -Xms and -Xmx
9. Shortcut & File Associations: How the application should be represented in menus and on the desktop
10. Pack200: Configure whether Pack200 compression is used for faster download and launch of applications
Date:2023-01-07
What is a core Java developer job description?
A Core Java Developer is responsible for developing and providing efficient, reliable, extensible and maintainable Java-based applications for multiple departments within an organization. This position requires a strong knowledge of object-oriented design patterns and algorithms, as well as a thorough understanding of the Java language, libraries, APIs and frameworks. A successful candidate will be organized and detail-oriented, have strong problem solving and communication skills, and be able to learn quickly and work independently or collaboratively.
Job Responsibilities:
• Develop high quality, bug-free applications in Java
• Designing, developing, testing and enhancing software applications
• Maintaining existing applications and fixing bugs
• Participating in software architecture design and development
• Writing well-designed, testable code
• Assisting with user acceptance testing (UAT)
• Collaborate with cross-functional teams to define and solve complex problems
• Troubleshooting and debugging applications
• Documentation of applications and processes
Date:2023-01-07
What is connector in Java EE?
Connector in Java EE stands for Java Database Connectivity (JDBC), which is a set of Java APIs that are used to connect to databases. It allows Java applications to access and manipulate data in a relational database. It also provides a common interface that enables developers to write code that can be used across a variety of databases without having to write different code for each database type.
Date:2023-01-07
What are the advantages of a Java EE application server?
1. Improved Security: Java EE application servers provide a secure environment for application deployment. They restrict access to unauthorized users and prevent hackers from gaining access to confidential data.
2. Flexible Deployment Options: Java EE application servers are more flexible than traditional web servers and provide the option of deploying applications locally, on-premises, or in the cloud.
3. Stable Platform: Java EE application servers are highly reliable and stable, offering reduced risk of application crashes due to hardware and software failures.
4. Scalability: Java EE application servers are designed to scale easily to meet the demands of small, medium, and large-scale enterprise applications.
5. Performance: Highly optimized for multitasking and multithreading, Java EE application servers offer improved performance and better database integration than traditional web servers.
6. Integration and Connectivity: Java EE application servers support a wide range of protocols and services, making it easier to integrate applications with back-end systems and services.
7. Maneuverability and Maintenance: Java EE application servers come with a set of tools and utilities, which makes maintenance and administration easier. The configurable, modular platform allows users to make changes easily.
Date:2023-01-07