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IBM Certified System Administrator - WebSphere Application Server

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Interview Questions and Answers

WebSphere provides scripting support using Jython and Jacl. Use scripting to automate administrative tasks, such as application deployment, configuration changes, and monitoring.

Memory leaks can be diagnosed using tools like heap dumps and memory analyzers. Analyze heap dumps to identify objects that are not being garbage collected and identify the source of the leak.

Class loading issues can occur when there are conflicts between different versions of the same class. Check the class path settings, verify that all required libraries are available, and review the class loading hierarchy.

SSL certificates are managed through the administrative console. You can generate certificate signing requests (CSRs), import certificates, and configure the server to use SSL for secure communication.

JMS configuration involves defining connection factories and destinations (queues or topics). Use the administrative console to create JMS resources and configure them to connect to a messaging provider.

Caching can be configured using various caching mechanisms, such as dynamic cache, object cache, and distributed cache. Configure caching parameters to improve application performance and reduce database load.

Best practices include enabling security features, using strong passwords, keeping software up-to-date, monitoring for security vulnerabilities, and following security guidelines from IBM.

Integration can be done through web services, APIs, or message queues. Configure WebSphere to communicate with other systems using appropriate integration technologies and protocols.

Security configuration involves setting up authentication mechanisms, authorization policies, and SSL certificates. Use the administrative console or scripting to configure security settings, such as user registries and role-based access control.

Clustering involves creating a deployment manager, adding nodes to the cluster, and configuring application deployment across the cluster members. Clustering enhances scalability and high availability.

Fix packs and updates are applied using the Installation Manager. Download the fix pack or update, launch the Installation Manager, and follow the instructions to apply the updates to the WebSphere environment.

The Deployment Manager is responsible for managing and synchronizing configuration changes across all nodes in a clustered environment. It provides a centralized management interface for administering the WebSphere environment.

High availability can be achieved through clustering, failover configurations, and load balancing. Configure multiple instances of the application server and use a load balancer to distribute traffic across the instances.

Performance monitoring can be done using the administrative console, Performance Monitoring Infrastructure (PMI), or external monitoring tools. Monitor metrics such as CPU usage, memory usage, thread pools, and response times.

Troubleshooting involves analyzing logs, checking server status, verifying configuration settings, and using debugging tools. Common issues include application deployment errors, connection problems, and performance bottlenecks.

Common profile types include the base profile, the deployment manager profile, the managed node profile, and the custom profile. Each profile type serves a specific purpose in a WebSphere environment.

Installation involves downloading the installation manager, launching it, selecting the desired WebSphere edition, and following the prompts. Choose the appropriate installation type (e.g., traditional or Liberty) and configure the profile.

Applications can be deployed through the administrative console, using the wsadmin command-line tool, or by using scripting languages like Jython or Jacl. The deployment process involves specifying the application archive (WAR, EAR) and configuring the deployment settings.

Data sources are configured through the administrative console. You need to specify the JDBC provider, data source name, JNDI name, database URL, and authentication credentials. Test the connection to ensure its working correctly.

WebSphere Server Administrators are responsible for installing, configuring, managing, and troubleshooting WebSphere Application Server environments. This includes deploying applications, monitoring performance, ensuring security, and applying updates.

Ripple start is a way to restart the servers in cluster. It first stops and then restarts each member of the cluster

Identify the ID of the process that is consuming CPU excessively.

- Reviewing CPU utilization with JVM utilities - thread dumps.

- Using a dedicated tool like TDMA

- Reboot.

- End or Restart Processes.

- Update Driv

The deployment manager is an administration application that runs in a special application server, which is created when you install the WebSphere® Application Server Network Deployment product or when you create a management profile using the deployment

Set global security.

- Set JVM.

- Set session management.

- Set the environment variable.

- Restart the server.

- Deploy the web app on the server.

- Create a shared library for the dgaas application.

vertical cluster:- Vertical clustering is the practice of deploying multiple identically configured web application server instances on a single machine.

- horizontal cluster:- Horizontal clustering is the practice of deploying Web Application Ser

Explain with examples that sync with the job description.

Some common issues - DNS issues and network connectivity.

- Slow servers and loading time.

- Poorly written code.

- Lack of load balancing.

- Traffic spikes.

Explain with examples that sync with the job description

stopServer.log, SystemErr.log, SystemOut.log, and trace.log

: In WebSphere web console, select Servers -> Server Types -> WebSphere application servers -> Server Infrastructure -> Java and Process Management -> Process definition. 3. In General Properties section, put 256 for “Initial heap size” and 1024 for “Maxi

In general, using archived files is more efficient when deploying applications to Managed Servers

A virtual host is a configuration entity that enables a single host machine to resemble multiple host machines. It maintains a list of Multipurpose Internet Mail Extensions (MIME) types that it processes

Explain with examples that sync with the job description.

Model–view–controller(MVC) is a software design pattern used for developing user interfaces that separate the related program logic into three interconnected elements. Each of these components is built to handle specific development aspects of an applicat

Explain specific instances with respect to the job JD.

(1) Choose the Right Technology when picking up a programming language, Database, Communication Channel.

(2) The ability to run multiple servers and databases as a distributed application over multiple time zones.

(3)Database backup, correcti

Most modern development processes can be described as agile. Other methodologies include waterfall, prototyping, iterative and incremental development, spiral development, rapid application development, and extreme programming

Software Development Life Cycle (SDLC) is a process used to design, develop and test high-quality software. Also referred to as the application development life-cycle.

NA

Explain specific instances with respect to the job JD.

A good software engineer is someone who is not only competent to write code but also competent to create, produce and ship useful software

NA

Schedule, Quality, Cost, Stakeholder Satisfaction, Performance

A software project manager determines the project specifications, builds the project team, draws up a blueprint for the whole project outlining the scope and criteria of the project, clearly communicates the project goals to the team; allocates budget, an

The most common software sizing methodology has been counting the lines of code written in the application source. Another approach is to do Functional Size Measurement, to express the functionality size as a number by performing Function point analysis.

software configuration management (SCM) is the task of tracking and controlling changes in the software code, part of the larger cross-disciplinary field of configuration management. Whereas change management deals with identification, impact analysis, do

Basecamp, Teamwork Projects, ProofHub, Zoho Projects, Nifty, Trello, JIRA, Asana, Podio, etc.

NA

Functional requirements are the specifications explicitly requested by the end-user as essential facilities the system should provide. Non-functional requirements are the quality constraints that the system must satisfy according to the project contract,

Different Types Of Software Testing - Unit Testing, Integration Testing, System Testing, Sanity Testing, Smoke Testing, Interface Testing, Regression Testing, Beta/Acceptance Testing.

Quality control can be described as part of quality management that is focused on fulfilling quality requirements. While quality assurance relates to how a process is performed or how a product is made.

Single Responsibility Principle (SRP), Open/Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), Dependency Inversion Principle (DIP).