PCF interview questions for freshers/PCF Interview Questions and Answers for Freshers & Experienced

What is Loggregator?

The Loggregator (log aggregator) system streams application logs to developers.

Posted Date:- 2021-09-29 08:52:04

How you can secure your data while moving it in a cloud?

The components used in less expensive client computers matches with the hardware components of a server computer in cloud computing. Although server computers are usually built from higher-grade components than client computers. Basic components include Motherboard, Memory, Processor, Network connection, Hard drives, Video, Power supply, etc.

Posted Date:- 2021-09-29 08:50:39

How the components of cloud Foundry communicate?

By simply posting the messages internally with the help of HTTPS protocols and HTTP, components can communicate with each other. It is also possible that they can send NATS messages directly to each other.

Posted Date:- 2021-09-29 08:49:41

What do you know about system integrators in Cloud Foundry?

These are very useful in providing a game plan of a complex process that is used to design a cloud platform. Integrator enables to build correct private and hybrid cloud network as they are equipped with all the information related to creating a data center.

Posted Date:- 2021-09-29 08:48:48

What Security aspects are available with the Cloud Foundry?

Cloud Foundry assures several security aspects and common ones are

1. Access Control: Users are provided permission to control the access of others who enter the cloud environment
2. Identity Management: authorizing the application services is done by identity management
3. Authorization and Authentication: To ensure security, cloud Foundry only allows the authenticated and authorized users to access applications, data, or any information.
Thus cloud foundry is secure

Posted Date:- 2021-09-29 08:48:01

Do I need a Linux Foundation ID to register for the Certificate exam?

Yes, to register for the exam, you will need a Linux Foundation ID. If you do not already have a Linux Foundation ID, apply for one here. You will receive an email with the subject line: “Validate your Linux Foundation ID email.” Once completed, you can log in when prompted with your new Linux Foundation ID credentials.

Posted Date:- 2021-09-29 08:47:19

What are the characteristics of Cloud Foundry?

Cloud Foundry is capable to offer hardware requirements depending on the demand. Without failure, it is capable of handling and controlling aggressive workloads. Also, Cloud Foundry is capable to escalate the resource on demand. There are other characteristics such as scalability and using different languages on a single app.

Before proceeding with Cloud Foundry, are there any essential things that are being paid attention to?
Although Cloud Foundry is a secure platform, there are certain things that one must consider and they are :

1. Uptime
2. Loss of Data
3. Business continuity
4. Compliance
4. Data integrity
5. Data Storage
6. Compatibility issues

Posted Date:- 2021-09-29 08:46:22

How cloud services are measured?

Cloud computing provides the services to the organizations so they can run their applications and install them on the cloud. Virtualization is used to deploy the cloud computing models as it provides a hidden layer between the user and the physical layer of the system. The cloud services are measured in terms of use. Pay as much as you use that can be on the basis of hours or months or years. Cloud services allow users to pay for only what they use and according to the demand, the charges or the prices gets increased.

Posted Date:- 2021-09-29 08:45:29

What is Diego Cell?

Application instances, application tasks, and staging tasks all run as Garden containers on the Diego Cell VMs. The Diego cell rep component manages the lifecycle of those containers and the processes running in them, reports their status to the Diego BBS, and emits their logs and metrics to Loggregator.

Posted Date:- 2021-09-29 08:44:45

Cloud Controller maintains which records?

A) The Cloud Controller also maintain records of orgs, spaces, user roles, services, and more.

Posted Date:- 2021-09-29 08:43:38

How the users and workspaces are organized by Cloud Foundry?

Cloud controller or manager can simply define orgas as well as workspaces within assigned roles such as auditor, developer, and admin to every user to organize user access to control resource use and to the cloud. The UAA server simply braces access control and can store the information of the user either internally or externally through SAML and LDAP.

Posted Date:- 2021-09-29 08:42:56

What Is The Security Aspects Provided With Cloud?

Security is one of the major aspects which come with any application and service used by the user. Companies or organizations remain much more concerned with the security provided with the cloud. There are many levels of security which have to be provided within a cloud environment such as:

Identity management: it authorizes the application service or hardware component to be used by authorized users.
Access control: permissions have to be provided to the users so that they can control the access of other users who are entering in the cloud environment.

Authorization and authentication: provision should be made to allow the authorized and authenticated people only to access and change the applications and data.

Posted Date:- 2021-09-29 08:42:20

What Is The Difference Between Scalability And Elasticity?

Scalability is a characteristic of cloud computing through which increasing workload can be handled by increasing in proportion the amount of resource capacity. It allows the architecture to provide on-demand resources if the requirement is being raised by the traffic. Whereas, elasticity is being one of the characteristic provide the concept of commissioning and decommissioning of a large amount of resource capacity dynamically. It is measured by the speed by which the resources are coming on demand and the usage of the resources.

Posted Date:- 2021-09-29 08:41:35

Comment On The Security Of Cloud Computing?

It is a sub-domain of networks, computers and information security in a larger aspect. Cloud computing security is referred to as cloud computing. It is designed in such a way that it acts to safeguard the policies and technologies of organizations. Controls are deployed to protect applications, company’s data and framework of security protocols.

Posted Date:- 2021-09-29 08:40:56

Give A Brief Introduction Of Windows Azure Operating System?

The Windows Azure operating system is used for running cloud services on the Windows Azure platform, as it includes necessary features for hosting your services in the cloud. It also provides a runtime environment that consists of the Web server, computational services, basic storage, queues, management services, and load balancers. The operating system provides development. Fabric for development and testing of services before their deployment on the Windows Azure in the cloud.

Posted Date:- 2021-09-29 08:40:21

What do you know about Hybrid and Community Cloud?

The Community cloud is considered when organizations with similar needs and goals need to share the cloud service. On the other side, the Hybrid Cloud consists of several service providers. It can be considered as an integration of both private and public cloud which is considered by organizations when they need both public as well as private clouds.

Posted Date:- 2021-09-29 08:39:42

Why is Virtualization required in implementing the Cloud Foundry?

Handling service level policies are the first thing that demands virtualization in Cloud Foundry. In addition to this, handling cloud operating system is also made easy with virtualization. The most important is virtualization is very useful when it comes to keeping the user level and the backend level concepts different from each other. Moreover, it helps in cutting down the errors that declare their presence from time to time.

Posted Date:- 2021-09-29 08:38:51

What are the platforms that are used for the large-scale Cloud Foundry?

There are two common platforms that are considered when it comes to large-scale Cloud Foundry and they are MapReduce and Apache Hadoop. Both of them are compatible and best in doing their task.

Posted Date:- 2021-09-29 08:38:23

Where resources are stored in Cloud Foundry?

A Git system is there in Cloud Foundry that is used on GitHub for controlling simply the build packs, source code, important documentation as well as other resources. It is also possible that developers use GitHub for custom configurations. Large binary files like droplets are stored in an internal or external blobstore which is maintained by the Cloud Foundry. When it comes to sharing or storing the information which is temporary, Consul and MYSQL is being considered by Cloud Foundry.

Posted Date:- 2021-09-29 08:37:54

Tell about the different modes of software as a service (SAAS)?

There are two modes basically and they are “Fine-grain multi-tenancy in which resources are simply shared without limit but functionality doesn’t change. Another mode is “Simple multi-tenancy” in which every user has self-reliant resources and is quite distinct as compared with other users. Generally, it is considered as a powerful mode than others.

Posted Date:- 2021-09-29 08:37:25

What do you know about cloud load balancing?

* Cloud Foundry installation complete these tasks at three different levels

* Cloud Foundry controller simply runs the applications and some other operations on the cloud virtual machines simply balancing the demand.

* Bosch simply comes out with virtual machines on the head of computing infrastructure. After this, it expands and runs cloud foundry on the top of the cloud. A manifest document is followed to simply configure this deployment process.

* The router simply routes the traffic to Virtual machines that run the apps in such a way that it starts working with a client-provided load balancer.

Posted Date:- 2021-09-29 08:36:18

Is there any difference between scalability and elasticity in Cloud Foundry?

A scalability is an approach in Cloud Foundry with the help of which blooming workload can be handled by growing in magnitude the supply of resource capacity. On the other side, elasticity reflects the notion of assigning and eliminating of resource capacity on a large amount. Both Scalability and Elasticity are required to derive the best results. Also, both these can be considered as the characteristics of Cloud Foundry.

Posted Date:- 2021-09-29 08:35:11

Name the security laws that are implemented for data security in the cloud?

The first one is the Input Validation which controls the input data. The second law is File which controls and manages the data being employed in any of the files. Output reconciliation is another law which is liable for controlling the reconciliation of data from input to output.

Posted Date:- 2021-09-29 08:34:37

What are the different layers that define the architecture of Cloud Foundry?

Node Controller, Walrus, cloud Controller, Storage Controller, and Cluster Controller are the layers of cloud Foundry architecture. These layers are best in making the cloud environment reliable and developers can perform their tasks simply and quickly. Because of these layers, Cloud Foundry is the best technology.

Posted Date:- 2021-09-29 08:34:06

How monitoring and analyzing of Cloud Foundry can be done?

Well, it is not a big deal. As the cloud simply runs, router Virtual machines, cloud controller virtual machines, and other apps running on virtual machines develop metrics and logs. Logg-reactor system manages the concerned data in a usable and structured form i.e. the firehouse. It is possible to simply direct the outcome for specific uses like analyzing and monitoring user behavior simply by considering nozzles.

Posted Date:- 2021-09-29 08:33:40

How Iaas and PaaS are different terms?

Infrastructure as a Service (IaaS) basically provides a base infrastructure and the end-users are liable for the configuration of environment and platform which is significant to expand applications. The common examples of this approach are Microsoft Azure and Amazon Web Service.

Platform as a Service (PaaS) is useful when it comes to cutting down the environment configuration by offering a platform that is always ready to use. It is possible to host PAAS services on top of IAAS infrastructure.

Posted Date:- 2021-09-29 08:33:02

What is the difference between Cloud Foundry and traditional data centers?

Traditional data centers were always having issues related to software or hardware and thus a lot of money is required. On the other side, Cloud Foundry is a good approach. It doesn’t need a lot of money to be invested for its maintenance as well as management. Also, in terms of scalability, Cloud Foundry is an excellent approach as compared to traditional data centers.

Posted Date:- 2021-09-29 08:32:34

What are the benefits of using Cloud Foundry?

The leading benefit of this platform as a service (PAAS) is its open-source nature. Developers can easily keep up the pace without worrying about the infrastructure and expertise. It is also compatible with a very large number of languages which makes it best for any type of results. In addition to this, Cloud Foundry is useful for both small as well as large-scale apps. Moreover, this technology can easily be deployed and factors such as cost and expertise are not a big deal. There are several other benefits such as:

1. Centralized logging
2. Application Health Management
3. Application portability
4. Support for various IaaS providers
5. Dynamic routing
6. Application Auto-scaling

Posted Date:- 2021-09-29 08:32:13

Can we use third party log mangers in Cloud Foundry (PCF)?

Yes, Cloud Foundry provides provision to use third party managers like Splunk, Logstash, Logenteries, Papertrail etc.

Posted Date:- 2021-09-29 08:30:52

How memory allocation happens?

-512 is default memory would get allocate.
-Can configure/extend as per project application or production needs

Posted Date:- 2021-09-29 08:30:11

In how many ways we can use Pivotal Cloud Foundry?

There are various ways to connect to Cloud Foundry.
* Command Line Interface (CLI)
* Web based application management
* Eclipse/STS plugin

Posted Date:- 2021-09-29 08:09:35

What is Services?

Any type of add-on can be provisioned alongside your app
-database,mail,messaging etc
-services are usually bound to one or more applications
-connection information are put in environment variable called VCAP_SERVICES

Posted Date:- 2021-09-29 08:08:50

What is Manifests?

-A deployment blueprint for an application
-Repeatable :redeploy using same manifest
Example:
---
applications:
- name : teckgeeknextPrj
memory : 64M
instances : 3
domain :cfapps.io

Posted Date:- 2021-09-29 08:07:14

How to force delete Queue on Qmanager with PCF commands?

PCFMessage message = new PCFMessage (CMQCFC.MQCMD_CHANGE_Q);
message.addParameter(CMQC.MQCA_Q_NAME, name);
message.addParameter(CMQC.MQIA_INHIBIT_GET, CMQC.MQQA_GET_INHIBITED);
agent.send(message);

Posted Date:- 2021-09-29 08:06:04

How to write PCF command to get channel status with a condition?

responses = agent.send(request);
for (int j = 0; j < responses.length; j++) {
:
:
checkStatus = chStatusText[chlStatus];
}
System.out.println("chl: " + channelName + " STATUS: " + checkStatus + ")");

Posted Date:- 2021-09-29 08:05:03

What is Point coordination function?

Point Coordination Function is an optional technique that is used in preventing collisions which are based WLAN standard including Wi-Fi, it is an access control sublayer technique used in arears where carrier sense multiple access with collision avoidance is used.PCF is used as a distributed coordination function which is used in centralised control system, and is present in the access point of the wireless network.

Posted Date:- 2021-09-29 08:04:39

What are the advantages of PCF?

PCF is compatible with large number of languages.
PCF also can be used in small and large application.
PCF acts as a centralised logging.
PCF can compute efficiencies.
PCF supports various IaaS providers.

Posted Date:- 2021-09-29 08:04:12

What are the components of PCF?

Components of PCF are as follows:
BOSH helps in deploying kubernets clusters, and acts like a deployment manager tool which is developed for using with Cloud Foundry.
Ops Manager helps in automating tasks and supporting the deployment of PCF into IaaS environments.
User Account and Authentication Server acts as a components of PCF controls identity and access management of the server.
Gorouter used by PCF for handling incoming requests from operators and developers.
Cloud Controller helps in centralizing API endpoints where developers and operators that sends commands to PCF and deploys application.
Diego acts as an container orchestration system for PCF deployments.
Loggregator helps in aggregating and streaming computer generating log and event files and metrics from all PCF's infrastructure components and application which are deployed.

Posted Date:- 2021-09-29 08:03:37

What is the difference between Cloud Foundry, PCF Dev, PCF and Pivotal Web services?

CF - Cloud Foundry is a project with an open source. It is created by the Foundation of the Cloud. Anyone can take and run the parts of the opensource.
PCF - Pivotal Cloud Foundry is a commercial version of Cloud Foundry that is produced by Pivotal. It has commercial functionalities appended above and beyond what is available in Cloud Foundry's open source version, but is 100% Cloud Foundry compliant.
PCF Dev - PCF Dev is a scaled down PCF version that can be run in a VM on your local machine. It has developer-oriented apps that would like to work locally and possibly offline. It has not all of PCF's functionality. It's free, but mixed in commercial components.
Pivotal Web services - This is Pivotal's hosted version of Cloud Foundry. The core runs the latest bits of open source, but Pivotal also mixes some of the services offered by PCF. PCF Dev has some services, but not as many as PWS.

Posted Date:- 2021-09-29 08:03:12

What are the features of UAA in Cloud Foundry (PCF)?

Below are the main features of UAA

* Token exchange for SAML , JWT bearers, support for JWT
* Token revocation
* Authentication, authorization, and configuration management fro Rest Api's
* Token exchange for SAML and JWT bearers
* Logging, Auditing, and monitoring
* Flexibility of the server, including support for MySQL and Postgres

Posted Date:- 2021-09-29 08:02:39

What is UAA in Cloud Foundry (PCF)?

User Account and Authentication (UAA) is an open source identity server in Cloud Foundry. UAA provides identity-based security for both applications and APIs. Cloud Foundry provide open standards for authentication and authorization including following:

* OAuth
* OpenID Connect
* System for Cross-domain Identity Management (SCIM)
* Lightweight Directory Access Protocol (LDAP)
* Security Assertion Markup Language (SAML)

Posted Date:- 2021-09-29 08:01:48

What is Cloud Foundry log aggregator and it's architecture?

Cloud Foundry log aggregator collects logging output from application instances, cloud foundry components. And aggregates into consolidated log.
Logging Server : Process is called Doppler.
Loggregator= Metrics agents + Logging Servers + Traffic Controllers

Components:

* Metron Agent: Receive both logs and metrics
* Doppler Server: Accumulates data from agents
* Traffic Controllers: Allow access to metrics and logs

Posted Date:- 2021-09-29 08:00:27

What is droplet in Cloud Foundry?

Droplet is the execution unit of the Cloud Foundry. The result is a droplet once an application has been pushed to Cloud Foundry using a buildpack. Therefore, a droplet on top of the request is nothing but an abstraction that contains information such as metadata.

Posted Date:- 2021-09-29 08:00:02

What is stagging in Cloud Foundry?

An archive within Cloud Foundry which contains the application-ready to run on Diego. A droplet is the result of the application staging process.

Posted Date:- 2021-09-29 07:59:47

What is difference between restart and restage in Cloud Foundry (PCF)?

By Restarting application, it stop your application and restarts application with the existing available compiled droplet.
By Restaging application, it stop your application and restages application by compiling new droplet and start the application.
So if you have made any changes in code, in that case use restage to re-compile your code else use restart to restart the application.

Posted Date:- 2021-09-29 07:59:32

What are the components in Cloud Foundry and Cloud Foundry Architecture?

Cloud Foundry is an open source cloud PaaS(Plateform as a Service), It can be deployed on any IaaS (Infrastructure as a Service), like OpenStack, AWS, vSphere. Below is high level cloud foundry architecture and it's major components.

Posted Date:- 2021-09-29 07:58:51

Why Cloud Foundry?

* Open Source : Reduce vendor lock
* Public OR Private
* Language Independence ‐ Via Buildpacks
* Wide growing range of services

Posted Date:- 2021-09-29 07:58:20

What are types of cloud computing?

Iaas (Infrastructure as a Service)

* Replacement for physical hardware
* Provides virtual hardware , OS, Network
* Amazon Web Services (AWS), RackSpace, Microsoft Azure, VMware vCloudAir

PaaS (Platform as a Service)

* More than a raw machine with OS
* Provides ready-made Platform for running apps
* CloudFoundry, Heroku, Google App Engine, Amazon Elastic Beanstalk

SaaS (Software as a Service)

* Complete Software Application
* SaleForce.com, Google Apps etc.

Posted Date:- 2021-09-29 07:57:54

What do you understand by "The Cloud"?

* Distributed applications accessible over network.
* Resource on Demand : On-demand cloud computing allow provide resources on an "as needed" basis to client, rather than all at once. Advantages are Efficient Resources Management, Reduced Costs etc.
* Can run in-house (private cloud) as well.
* Hardware and Software sold as commodity
* Inherently Virtualized : Because of this feature, there are many benefits like Cost reduction, Clean up the environment.,Uptime increase,Faster provisioning, Easier backup.

Posted Date:- 2021-09-29 07:55:35

What is the Cloud Foundry?

Cloud Foundry is an open source cloud computing platform originally developed in-house at VMware. It is a platform (PaaS) for cloud native application, it helps developer to just focus on code rather worrying about platform they use and their configurations.

Posted Date:- 2021-09-29 07:54:23

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