WebLogic portal or server is a platform used to develop and maintain web applications. Computer programmers and developers require a comprehensive understanding of WebLogic to create interactive applications. If you are applying for jobs that use the WebLogic portal or server, the interviewer may ask some technical questions related to the subject. In this article, Pritish Kumar Halder discusses some common WebLogic portal interview questions and provides their example answers.
15 Commonly Asked WebLogic Portal Interview Questions
Here are some WebLogic portal interview questions to help you prepare better:
1. What is a WebLogic Server?
This may be the first question that your interviewer might ask you at the beginning of the interview to check your understanding of the technology. Answer it by defining what a WebLogic server is and its usage in the industry.
Example: “WebLogic is a unified server platform that enables the development, deployment and maintenance of web applications. It also helps in implementing Java Enterprise Edition (JEE) and Jakarta Enterprise Edition. It is widely used in the industry to launch and scale e-commerce enterprises.”
2. What is the use of HTTP?
The interviewer can ask these basic questions to test your fundamental knowledge. Answer this question by explaining the use of HTTP briefly.
Example: “HTTP is used to enable the communication between the processes and WebLogic server.”
3. What are some features of the WebLogic server?
Hiring managers typically ask this question to assess if you are aware of the different benefits and applications of WebLogic. List down some of the primary features of the WebLogic server to answer this question.
Example: “Some of the features of the WebLogic server are comprehensive Java support, diverse client options, flexible web services, e-commerce enterprise scalability, e-commerce security and flexibility to develop and scale.”
4. What is a WebLogic express?
To test your knowledge about the latest innovations in the industry, the interviewer may ask you about WebLogic express and its usage. In your response, you can tell them about the platform and its usage.
Example: “WebLogic express is an innovative and dynamic platform that allows e-commerce enterprises to create engaging applications quickly. It has five primary features which are Java server pages, servlets, remote method invocation, web server functionality and WebLogic server.”
5. What are the key components of the WebLogic server?
The interviewer might ask you technical questions to understand your expertise in the topic. Make sure you answer such questions comprehensively. In your response to this question, list all the components of the server.
Example: “The WebLogic server has three primary components. They are domain, cluster and servers.”
6. What are the conditions that the WebLogic server may face?
Experienced developers and programmers typically know the different conditions of the server. List them to the interviewer to showcase your understanding of the server.
Example: “There are nine different conditions of the WebLogic server. These are starting, running, shutdown, standby, resuming, unknown, failed and suspending.”
7. What is the difference between multicast and unicast?
Multicast and unicast are two different clustering techniques. The interviewer may ask you this question to find out if you understand these techniques. Explain the primary difference between both to answer this question.
Example: “Multicast is a complex clustering system where each server needs to message each other to confirm their existence. In this system, no cluster master is allotted. Due to the exchange of many messages, it creates a lot of complications in the process as compared to unicast. Unicast is a clustering method where a cluster master is assigned. Every time a server goes live, it can directly message the cluster master. It is simple and avoids excessive messaging.”
8. What number is the default admin server?
This is another simple yet technical question to assess your understanding of essential WebLogic functions. Answer this technical question based on your knowledge of the WebLogic server.
Example: “The default admin server number is 7001.”
9. What is the significance of removing cache?
It is important for the employer to make sure that you perform different technical tasks in WebLogic and understand their importance. Explain why it is essential to remove cache to showcase your expertise to the interviewer.
Example: “Removing cache is a significant part of deploying new versions of applications. Every time you upload new code objects to the web application, the WebLogic server scans for any old objects present in the server directory. The presence of old objects may cause complications in deploying a new version. This is why it is important to clear cache prior to performing these actions.”
10. What is an administration server?
The interviewer might ask this question to know your understanding of different types of servers. Answer this question by defining what an administration server is and explaining its role.
Example: “An administration server is the hub of all activities related to the configuration of the server. It helps in tracking all the domain resources at a single place and managing them effectively.”
11. What is the procedure for accessing the admin console?
As the interview progress, the interviewer might ask you questions specific to certain functions to evaluate your practical knowledge. In your response, explain the process of accessing the admin console.
Example: “To access the admin console, open the navigation bar of a browser. Next, type the name of the administrator machine. This will redirect you to the login page where you can enter the login credentials to enter the console.”
12. What is the process of analysing a server hang issue?
This question can help interviewers understand your problem-solving abilities. Discuss the causes of a server hang and commands to analyse them to answer this question.
Example: “A server may hang due to various reasons like a heavy load, shortage of resources or hardware issues. To understand the cause use this command: Java weblogic.admin ping. If there is a response to this command, you can go ahead and find out the cause of the problem.”
13. What are the different ways of installing a WebLogic server?
This question can help the interviewer assess your understanding of specific WebLogic procedures. Answer this by listing the three different ways of installing a WebLogic server.
Example: “The three methods of installing a WebLogic server are console mode, graphical mode and silent mode. The first two methods are interactive, while the third one is a non-interactive method used with .xml files.”
14. What is a domain template?
The domain is an important part of the WebLogic server. Interviewers can ask this question to assess your specialised knowledge of WebLogic. Answer this question by stating what a domain template is, and you can also explain its usage.
Example: “Domain templates are .jar files which are crucial for WebLogic domains. If you create a domain template, it becomes easier to configure while creating a new domain. We can also use these templates for clusters, machines, servers or applications.”
15. What is the difference between WebLogic development mode and production mode?
Knowing about the different models of WebLogic development is crucial for web developers. Answer this question by listing down the features of both development and production modes.
Example: “The WebLogic server development mode helps deploy applications automatically when the server starts. This is enabled by the WebLogic admin server, which creates boot.properties files. In the WebLogic server development mode, we activate the workshop debugger using the debugflag. Compared to the production mode, the security configuration is not as robust as the WebLogic server development mode. The compilation time goes down by enabling a fast swap. This ensures that Java classes are in place. Finally, Sun Java Development Kit is used to run the WebLogic server domains in development mode.
The WebLogic server production mode does not allow automatic deployment of applications. Instead, one has to use weblogic.deployer to deploy updates through the admin console manually. Also, in the production mode, the WebLogic server provides additional security features. In addition to this, the production mode in the WebLogic server allows a maximum file size of up to 500kb, and up to 25 threads are available to execute queues. As compared to the development mode, the WebLogic server production mode does not allow fast swap. All security configurations are enabled in WebLogic server production mode.”