Apigee interview questions And Answers

 Apigee is a platform to develop and manage APIs. Apigee was acquired by Google in September 2016 but the core technology first came into existence in 2004. The primary reason for choosing Apigee is to develop user-friendly APIs with modern REST interfaces and access keys. It also includes a ton of monitoring and analytical tools and a lenient security model to help the company take current back-end and expose all of its outside developers. With this write-up, we’ll go through Apigee interview questions and Apigee interview questions and answers for developers.

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 Categories of Apigee Interview Questions

Q.1) What is Apigee?

Ans: Apigee is a software platform for the development and management of APIs. Apigee frontline the services with a proxy layer that provides an abstraction or simulation for your backend APIs to provide, security, rate limiting, analytics, and more. Apigee manages the API gateway and enables easy processes to deploy and create modern friendly applications.

Q.2) What are the primary components of Apigee?

Ans: Apigee consists of the following components:

  • Apigee services: The APIs that you use to develop, manage, and send your API proxy.

  • Apigee runtime: A lot of containerized runtime services in a Kubernetes cluster that Google keeps up. All API traffic goes through and is handled by these services.

  • GCP services: Provides identity management, logging, analytics, metrics, and project management capacities.

  • Back-end services: Used by your applications to give runtime access to data to your API proxy.

Q.3) What are the available flavors of Apigee?

Ans: Apigee has the availability of the following factors:

Apigee: A hosted SAAS version in which Apigee maintains the environment, allowing you to concentrate on building your services and defining the APIs to those services.

Apigee hybrid: Lets you manage APIs on-premises, on Google Cloud Platform (GCP), or a mix of both.

Q.4) What things do you need to consider to make your services available on the web?

Ans: Considerations like:

Security: How will you control access to your services to prevent unauthorized access?

Compatibility: Will your services work across different platforms and devices?

Measurability: How can you monitor your services to make sure they are available?

Q.5) What are web services?

Ans: A web service speaks to a collection of open conventions and principles utilized for exchanging data between applications. Software applications written in different programming languages and running on different platforms can utilize web services to exchange data over computer networks like the internet in a way like between process communications on a single computer.

Q.6) What is synchronicity in web services?

Ans: The official of a customer to the execution of the service is termed as synchronicity. In synchronous invocations, the customer ends and trusts that the service will finish its activity before proceeding. Asynchronous operations permit a customer to invoke a service and afterward execute other functions.

Q.7) What are the main security concerns with web services?

Ans:

  • Network security

  • Service authentication

  • Confidentiality

Q.8) What if we want to maintain a user session in web services, is it possible?

Ans: No, we cannot have or maintain user sessions in web services as it is stateless.

Q.9) Is there any difference between API and Web Services?

Ans: API goes about as an interface between two unique applications so they can communicate with one another. An API isn't really web-based. The programming interface may utilize any methods for correspondence to start cooperation between applications.

Web service encourages connections between two machines over a network. It additionally utilizes SOAP, REST, and XML-RPC as methods for correspondence.

All Web services are APIs yet all APIs are not Web services. 

A Web service utilizes just three styles of utilization: SOAP, REST, and XML-RPC for communication though API may utilize any style for communication.

Web service in every case needs a system for its activity through an API needn't bother with a system for its activity.

Q.10) What is exactly an API?

Ans: API is known as Application Programming Interface that is software that enables two applications to interact with each other. It consists of a number of subroutine definitions, logos, and tools to create application software.

Apigee Certification Questions and Answers

Q.11) Give some examples of well-known APIs?

Ans: Google Maps API, Amazon Advertising API, Twitter API, YouTube API, etc.

Q.12) Are there any limits in the usage of APIs?

Ans: Numerous APIs have a specific limit set up by the provider. Accordingly, attempt to estimate your use and see how that will affect the general expense of the contribution. Regardless of whether this will be an issue depends on a huge part of how data is utilized. Getting captured by a standard and effectively cut-off as a result of budget limitations will deliver the service (and any framework or procedure relying upon it) virtually useless.

Q.13) Explain some architectural styles that are useful in creating a web API.

Ans:

HTTP for client-server communication

XML/JSON as a formatting language

Simple URI as the address for the services

Stateless communication

Q.14) Who can be the audience or users of API?

Ans: Web API can be devoured by any customers who support HTTP action words, for example, GET, PUT, DELETE, POST. Since Web API services don't require an arrangement, they can be handily utilized by any customer. In fact, even portable gadgets, for example, cell phones can easily use Web API, which is without a doubt the greatest preferred advantage of this technology.

Q.15) Explain API testing?

Ans: API testing is a type of software testing that determines if the created API can meet the expectations related to functionality, reliability, performance, and security of the application.

Q.16) State a few of the advantages of API testing?

Ans:

  • Test for Core Functionality: API testing gives access to the application without a UI. The center and code-level of functionalities of the application will be tried and assessed right on time before the GUI tests. This will help identify the minor issues which can increase during the GUI testing.

  • Time Effective: API testing for the most part is less tedious than practical GUI testing. The web components in GUI testing must be surveyed, which makes the testing procedure slower. Especially, API test robotization requires less code so it can give better and quicker test inclusion contrasted with GUI test computerization. These will bring about the cost of putting something aside for the testing venture.

  • Language-Independent: In API testing, data is traded utilizing XML or JSON. These exchange modes are totally language-free, permitting clients to choose any coding language while receiving automation testing services for the venture.

  • Simple Integration with GUI: API tests empower exceptionally integrable tests, which is especially helpful on the off chance that you need to perform useful GUI tests after API testing. For example, straightforward incorporation would permit new client records to be made inside the application before a GUI test began.

Q.17) What are the common protocols in API testing?

Ans: There are many protocols available in API testing, such as JMS, REST, HTTP, UDDI, SOAP, etc.

Q.18) Explain the test environment of API?

Ans: Setting up the API's test condition isn't a simple errand, so you ought to have a prepared answer if your API testing meeting is coming. The test condition of API is somewhat finished and requires the arrangement of the database and worker, contingent upon the product necessities. No GUI (Graphical User Interface) is accessible in this test structure. At the point when the establishment procedure is finished, API is checked for the best possible activity. All through the procedure, the API called from the first condition is set up with various boundaries to consider the test outcomes.

Q.19) What is a service endpoint interface?

Ans: Service Endpoint Interface (SEI) is a Java interface class that defines the methods to be exposed as a web service.

Q.20) Have you ever utilized Apigee Edge?

Ans:  Apigee Edge platform is used for creating and managing APIs. By fronting services with an intermediary layer, Edge gives a reflection or exterior to your backend service APIs and gives security, rate constraining, shares, investigation, etc. I have utilized the intermediary layer of Apigee Edge to process the reaction from API and route to the end-user.

Apigee Developer Interview Questions

Q.21) What is WS-Security?

Ans: WS-Security or Web Services Security explains how security measures can be implemented in web services to protect them from any external attacks. WS-Security is a set of protocols that make sure security for SOAP-based messages by the implementation of the principles of security, integrity, and authentication.

Q.22) How can we make web services stateful?

Ans: Web services can be made stateful by implementing  session management techniques like:

  • Cookies

  • Hidden form field

  • Rewriting URL

  • HTTP session

Q.23) State the anatomy of a request?

Ans: It includes four parts:

  1. Endpoint

  2. Method

  3. Headers

  4. Data (or body)

Q.24) Explain idempotent operation?

Ans: Idempotent operations mean their result will always be the same, no matter how many times these operations are invoked.

Q.25) Which web services operations are idempotent?

Ans: PUT and DELETE operations are idempotent.

Q.26) Name the web service method which is read-only?

Ans: Get method.

Q.27) Explain the primary principles involved in API test design?

Ans:

  1. Setup: Create objects, start services, initialize data, etc

  2. Execution: Steps to apply API or the scenario, including logging

  3. Verification: Oracles to evaluate the result of the execution

  4. Reporting: Pass, failed, or blocked

  5. Clean up: Pre-test state

Q.28) State types of API testing?

Ans:

  • Validation Testing

  • Functional Testing

  • UI testing

  • Load testing

  • Runtime/ Error Detection

  • Security testing

  • Penetration testing

  • Fuzz testing

  • Interoperability and WS Compliance testing

Q.29) What are the mandatory checks while performing API testing?

Ans: While performing API testing, the following things should be considered:

  • Accuracy of data

  • Schema validation

  • HTTP status codes

  • Data type, validations, order, and completeness

  • Authorization checks

  • Implementation of response timeout

  • Error codes in case API returns, and

  • Non-functional testing like performance and security testing

Q.30) What common errors can you often find in API testing?

Ans:

  • Missing module errors

  • Documentation errors

  • Parameter validation errors

  • And some standard error expectations as if the result is not so predicted then the occurrence of errors can be seen and for the same warnings are specified in the form of a message. There can be one or more warnings within an individual module.

Conclusion

The above-mentioned 30 Apigee interview questions and answers will help you crack your next Apigee interview. These Apigee interview questions will also help you answer and successfully clear your screening round. Happy learning!