Get [LATEST] IBM API Connect Interview Questions and Answers

Last updated on 18th Nov 2021, Blog, Interview Questions

In this program of IBM API Connect interview questions, we have included all regularly asked basic and IBM API Connect interview questions for experienced candidates with detailed answers to help you clear the job interview. The following list includes the best important IBM API Connect questions for freshers as well as IBM API Connect questions and answers for experienced candidates to help them prepare for the interview. This complete guide of IBM API Connect interview questions will encourage you to crack your Job interview easily.

1. Why maintaining the lifecycle of an API is important?

Ans:

An API is designed to access the features or the functions of an operating system. Creating an API is not always a simple job. It needs a lot of money to be invested. If the API doesn’t work properly due to lack of maintenance, there are certain things that can go wrong. There are chances of the introduction of lots of errors. Because it is possible to integrate applications with each other, an API designed for a specific task might be used for others and thus the future cost can be saved. However, this is only possible when the lifecycle of an API is maintained.

2. Who can use IBM API connect and why?

Ans:

IBM API is a good option to consider for those who are engaged in It operations, Developers, and business promoters. It has been designed to help them in different aspects such as decision making, reliable management of operations, and helping programmers to ensure proper integration with each other.

3. What is API connect used for?

Ans:

IBM® API Connect® is a complete, intuitive and scalable API platform that lets you create, expose, manage and monetize APIs across clouds. This means you and your customers can power digital applications and spur innovation.

4. In an API builder work, how many files are created for the master package and temporary tables?

Ans:

Two files are created basically and both are useful to create the output code.

5. How can you say that API testing is different from UI-level testing?

Ans:

API testing	UI- LEVEL TESTING
Execution among different applications can be done through an API.	Testing the graphical interface is generally considered UI testing.

6. What exactly is the motive of the API connected by IBM?

Ans:

IBM API’s aim is to make the application highly reliable and scalable. API’s are generally the data applications that are small in size and are meant to help experts in performing a specific task. IBM API cut down all the errors from the work of programmers and the key challenges that are associated with the integration approach.

7. Why do clients need an API integration strategy?

Ans:

Setting up an API strategy can promote innovation, collaboration, and improve customer service. Organizations that fail to integrate all their different IT systems together and leverage the power of APIs will watch themselves lose market share to those who do.

8. Why do businesses need API?

Ans:

APIs, or application program interfaces, are vital tools for businesses in all industries. The importance of APIs from a technical standpoint, they allow the capabilities of one computer program to be used by another. They are a means by which two different programs are able to communicate.

9. What is the benefit of using Runscope for API testing?

Ans:

Runscope is basically a web application that offers backend services. It is actually an interface that is very easy to use.

10. What is API connect in IBM?

Ans:

11. While creating an Application Program Interface, when can problems declare their presence?

Ans:

Problems can be there anytime. However, there are stages that need the extra attention of the developers and other experts. While running, testing, updating, or while scaling, there are certain chances of things going wrong

12. Name one feature about IBM API Connect that makes it the ideal option to consider for any form of the development process in IT?

Ans:

The API connects is capable of handling multiple languages when it comes to development and supports all sizes of applications. It is based on the frameworks of Node.js and Java and thus there is no need for the users to worry about anything when it comes to using them for development and integration purposes.

13. What are the core capabilities of API connect?

Ans:

The IBM API Connect solution provides an infrastructure, tools, and facilities that allows users to create, manage, and stage APIs. The ability to perform tasks in the IBM API Connect user interfaces is controlled through user roles, and the permissions that are assigned to those roles

14. Is API connect a gateway?

Ans:

BM API Connect includes a single, signed, encrypted gateway to reduce cybersecurity risks.

15. Mention what is the difference between RPC or document style web services? How you determine to which one to choose?

Ans:

Rpc	Document style web
Document style web service is most appropriate in some applications where XML message behaves as document and content of that document can alter and intention of web service does not rely on the content of XML message.	In document style web services, we can transport an XML message as part of SOAP request which is not possible in RPC style web service.

16. What are the major challenges that are associated with the development of an application in the present scenario?

Ans:

Application development has changed up to a great extent in the last few years. The reason for this is to change the needs of businesses and users. There are certain challenges associated with modern application development. The very first one is to integrate the different technologies with each other which need expertise in different sections of IT. This often creates bugs and other similar issues. Also making the apps scalable and compatible with all the technologies and frameworks is a daunting task.

17. What do you mean by the term bug management?

Ans:

Bug management is an important module in product lifecycle management. Its aim is to simply eliminate the bugs up to a good extent and the fact is it’s easy to maintain all the general standards with this approach. A bug is basically a small error in the software or an application that can affect its functionality.

18. What exactly do you know about the Software Development Life cycle?

Ans:

It is nothing but the systematic development of different modules related to an application. It is generally done to ensure outcomes free from any form of technical glitches as it largely matters in Information Technology.

19. What are the modules that are associated with the SDLC?

Ans:

There are actually certain modules and largely depends on the application type and its function. Some of the basic modules include:

• System analysis
• Requirement gathering
• Coding
• Testing
• Documentation

20. Define an API lifecycle management architecture?

Ans:

21. What if one module of an API has a data error in it? Can it be considered for further use?

Ans:

Errors are quite common in API. However, this doesn’t mean that you can proceed with them further. There is always a need to rectify the same for the purpose of integration. If modules have data errors, there are chances that the entire project may fail.

22. What do you mean by the term estimation? How does that matter?

Ans:

Estimating the various aspects related to the design of an API is considered as the basic estimation. It generally covers the cost factors, maintenance factors. Factors such as efforts, time, as well as resources are considered on a large scale in this approach.

23. What exactly do you know about API testing?

Ans:

API basically specifies the way the different components of software interact with each other and what would be the outcome of the same. It is basically a set of procedures and well-defined functions that enable the creation of applications that are always in a position to simply access the features and functions of the data of any assigned application. Testing all such functions is generally considered API testing.

24. Name the three tools that are generally used to test the API?

Ans:

There are certain tools available. However, the ones that are considered as best are:

• Load UI Pro
• Soap UI Pro
• Alertsite API

25. Explain the architectural style for creating web API?

Ans:

Web API	Xml
The architectural style for creating web API are. HTTP for client server communication.	XML/JSON as formatting language. Simple URI as the address for the services. Stateless communication.

26. What are the tests that you can perform on an API? Are these tests related to each other in some way?

Ans:

API can be verified to know whether it’s updating any data structure or is not performing this task. This is actually the most common test that can simply be performed. All the returned values from an API can be checked and this is another common test. In addition to this, sometimes an API triggers another one without intimation and this is another test that needs to be performed.

All these tasks are completely different and they have no applications with each other. However, a few steps are common in them.

27.Name and compare the three editions of API Connect?

Ans:

The three editions of API Connect are:

• Essentials
• Professionals
• Enterprise

Essentials are available free of cost for developers and businesses. In this edition, no IDM support is available. Professional is the edition that can be considered for departmental use. It enables users to add nodes with a data center but there is a limit on the same. The third edition is the Enterprise which has all the features that can be accessed anytime. Full support of IBM is available all the time.

28. What do you mean by the term SOAP?

Ans:

It is basically considered for exchanging information among the systems that are different. It stands for Simple Object Access Control and is basically a very common protocol used in the API approach.

29. Name any two important tasks that you need to perform when it comes to testing an API?

Ans:

Configuring the application control parameters and view & execute the API test reports are very important tasks.

30. When getting started with IBM API connect?

Ans:

31. What are the actions in the lifecycle management of an API?

Ans:

The very first thing is to make sure that the API has been designed to meet the specific standards so that it couldn’t affect future outcomes. There are compilers that must be used to ensure compatibility. Any form of bugs that declare their presence must immediately be removed and at the same time, developers must make sure user-friendly APIs as they need less maintenance.

32. Why is APIgee needed?

Ans:

APIgee enables you to provide secure access to your services with a well-defined API that is consistent across all of your services, regardless of service implementation. A consistent API: Makes it easy for app developers to consume your services.

33. How developers can create testing tools for Win32 applications?

Ans:

This is generally done with the help of a TestAPI. It actually offers a complete set of building blocks that are useful for this task. It also consists of data structure and all-important algorithms. Because it is actually a library of utilities, a number of tools can be created with the help of it.

34. Name the different methods of performing an Input Injection?

Ans:

In API, sometimes there is a need to simulate the user input for different purposes. All such ways are regarded as Input Injection. There are certain methods for this and a few of them are:

• Simulation using Low-level Input
• Robotic simulation
• Direct method Invocation
• Device Driver simulation
• Accessibility interface invocation.

35. Name a few protocols that are commonly used for testing an API?

Ans:

These are:

• SOAP
• HTTPS
• UDDI
• JMS

36. Mention what is JAX-WS and JAX-RS?

Ans:

Jax-rs	Jax-wS
communication in JAVA, and JAX-RS lets you do the REST communication in JAVA.	communication in various ways in Java. JAX-WS is a library that can be used to do SOAP

37. What are API management features?

Ans:

API design – API management solutions provide users – from developers to partners – the ability to design, publish and deploy APIs as well as record documentation, security policies, descriptions, usage limits, runtime capabilities and other relevant information.

38. What is API?

Ans:

An API (Application Programming Interface) is a collection of software functions and procedures, called API calls, that can be executed by other software applications. Application developers code that links to existing APIs to make use of their functionality. This link is seamless and end-users of the application are generally unaware of using a separately developed API.

During testing, a test harness-an application that links the API and methodically exercises its functionality-is constructed to simulate the use of the API by end-user applications.

39. Why is maintaining the lifecycle of an API important?

Ans:

An API is designed to access the features or the functions of an operating system. Creating an API is not always a simple job. It needs a lot of money to be invested. If the API doesn’t work properly due to lack of maintenance, there are certain things that can go wrong. There are chances of introducing lots of errors. Because it is possible to integrate applications with each other, an API designed for a specific task might be used for others and thus the future cost can be saved. However, this is only possible when the lifecycle of an API is maintained.

40. What are the topologies for API connect?

Ans:

41. Can You Tell Us Which Java API Helps In Developing A RESTFul Web Service?

Ans:

There are many frameworks and libraries available that a developer can use to create RESTful web services in Java. For example, the JAX-RS library is a standard way to develop a REST web service.

42. Mention what is the difference between RPC or document style web services? How do you determine which one to choose?

Ans:

In document style web services, we can transport an XML message as part of SOAP request which is not possible in RPC style web service. Document style web service is most appropriate in some application where XML message behaves as document and content of that document can alter and intention of web service does not rely on the content of XML message.

43. How to test API’s ?

Ans:

To test the API’s you should follow the following steps:

• Select the suite in which you want to add the API test case
• Choose test development mode
• Develop test cases for the desired API methods
• Configure application control parameters
• Configure test conditions
• Configure method validation
• Execute API test
• View test reports
• Filter API test cases
• Sequence API test cases.

44. List out the tools or API for developing or testing web API?

Ans:

Testing tools for web services for REST APIs includes:

• Spring REST web service using MVC
• Jersey API
• CFX
• Axis
• Restlet.

45. What exactly do you know about the Rest API?

Ans:

Developers often have to make requests and have to receive responses. REST API is nothing but a set of functions through which developers can perform the same task. The best thing is it can easily be accessed or can be made available through HTTP protocol. The developers can always make sure of reliability as well as the functionality of the tasks and the good thing is they are all similar to each other which makes them simple to handle and operate.

46. Explain API framework?

Ans:

API framework is self-explanatory. Values for test run and for holding the configurable parts, config file is used. Automated test cases must be represented in “ parse-table” format within the config file. When testing an API, it is not necessary to test each API so the config file has some sections whose all API are activated for that specific run.

47. What Do You Understand By Payload In RESTFul Web Service?

Ans:

Request body of every HTTP message includes request data called Payload. This part of the message is of interest to the recipient.

48. What are the tools used for API test automation?

Ans:

While testing Unit and API testing, both target source code, if an API method is using code based on .NET then the tool which is supporting should have .NET Automation tools for API testing can be used are:

• NUnit for .NET
• JUnit for Java
• HP UFT
• Soap UI.

49. Explain what REST API is?

Ans:

It is a set of functions to which the developers perform requests and receive responses. In REST API interaction is made via HTTP protocol.

REST – stands for Representational State Transfer, it is quickly becoming the de facto standard for API creation.

REST stands for Representational State Transfer. REST is an architectural style of developing web services which take advantage of the ubiquity of HTTP protocol and leverages HTTP method to define actions. It revolves around a resource where every component is a resource which can be accessed by a common interface using HTTP standard methods.

In REST architecture, a REST Server provides access to resources and REST client accesses and presents those resources. Here each resource is identified by URIs or global IDs. REST uses different ways to represent a resource like text, JSON, and XML.XML and JSON are the most popular representations of resources these days.

50. What is integrated IBM API connect?

Ans:

51. What is a proxy endpoint?

Ans:

Proxy endpoints are the client-side equivalent of object adapter endpoints. A proxy endpoint identifies the protocol information used to contact a remote object, as shown in the following example: A proxy must have, or be able to obtain, at least one endpoint in order to be useful.

52. What are the benefits of using IBM API connect according to you?

Ans:

It is actually an approach that always makes sure of properly creating an API which is necessary to get errors free results. In addition to this, it is also necessary that API’s run in a reliable manner and can be managed securely. For all this, IBM API can simply be trusted. It is actually one of the best API lifecycle management solutions that are widely trusted.

53. In the API document explain how to document each function ?What are the tools used for documentation?

Ans:

Description: Small description about what a function does

Syntax: Syntax about the parameter of the code, the sequence in which they occur, required and optional elements etc.

Parameters: Functions parameters

Error Messages: Syntax of error messages

Example Code: Small snippet of code

Related Links: Related functions

Popular tools used for API documentations are JavaDoc.

54. State The Core Components Of An HTTP Request?

Ans:

Each HTTP request includes five key elements.

The Verb which indicates HTTP methods such as GET, PUT, POST, DELETE. 2.URI stands for Uniform Resource Identifier (URI).It is the identifier for the resource on the server. 3. HTTP Version which indicates HTTP version, for example-HTTP v1.1. 4. Request Header carries metadata (as key-value pairs) for the HTTP Request message. Metadata could be a client (or browser) type, the format that client supports, message body format, and cache settings. 5. Request Body indicates the message content or resource representation.

55. What does IBM API Connect do?

Ans:

IBM® API Connect® is a complete, intuitive and scalable API platform that lets you create, expose, manage and monetize APIs across clouds. This means you and your customers can power digital applications and spur innovation.

56. Explain The Caching Mechanism?

Ans:

Caching is a process of storing server responses at the client end. It makes the server save significant time from serving the same resource again and again. The server response holds information which leads a client to perform the caching. It helps the client to decide how long to archive the response or not to store it at all.

57. Explain The RESTFul Web Service?

Ans:

Mostly, there are two kinds of Web Services which are quite popular. SOAP (Simple Object Access Protocol) which is an XML-based way to expose web services. Web services developed using REST style are known as RESTful web services. These web services use HTTP methods to implement the concept of REST architecture. A RESTful web service usually defines a URI, Uniform Resource Identifier a service, provides resource representation such as JSON and a set of HTTP Methods.

58. What Purpose Does The OPTIONS Method Serve For The RESTful Web Services?

Ans:

This method lists down all the operations a web service supports. It makes read-only requests to the server.

59. How does the API Builder work?

Ans:

API Builder is a PLSQL program consists of four SQL files

For setting API parameters and starting the process one file is responsible

Two files are created for temporary tables and Master package to create the outputted code

Fourth file creates “spooled” output of the code into a file called “output_script_.sql”

60. What is IBM API connect administration?

Ans:

61. Explain what is TestAPI ?

Ans:

TestAPI is a library of utility and test APIs that enables testers and developers to create testing tools and automated tests for .NET and Win32 applications. It provides a set of common test building blocks, types, data-structure and algorithms.

62. Mention the steps for testing API?

Ans:

API testing steps:

• Select the test case that has to be fulfilled
• For API call develop a test case
• To meet the test case configure the API parameters
• Determine how will you validate a successful test
• Using programming language like PHP or NET execute the API call
• Allow the API call to return the data to validate.

63. Mention, Whether You Can Use GET Request Instead Of PUT, To Create A Resource?

Ans:

No, you shouldn’t use a PUT or POST method. Instead, apply the GET operation which has view-only rights.

64. What are the features of API connect for the core IT sector and what makes businesses trust this approach for large-scale deployments?

Ans:

One of the leading features about the API Connect is it simply boosts the rate of innovation in the core IT sector. It makes language reading easy and at the same time helps developers to impose a strict upper limit on the code while performing a specific task. Every customer can be paid special attention by any business with the help of this approach. Also, the delivery of services, as well as applications can be made better and up to an excellent extent. This is the reason why a lot of businesses are adopting it.

65. Write the procedure or the modules of creating an API in a stepwise manner?

Ans:

• Creation
• Testing
• Deployment
• Debugging
• Clustering
• Scaling
• Monitoring
• Management and administration

In this to this, integration can also be done in case the need of the same is felt.

66. Explain what is REST and RESTFUL?

Ans:

Rest	Restful
REST represents REpresentational State Transfer; it is a relatively new aspect of writing web API.	RESTFUL is for web services written by applying REST architectural concepts called RESTful services, it focuses on system resources and how state of resource should be transported over HTTP protocol to different clients written in different languages.

67. What types of Bugs will API testing find?

Ans:

The types of Bugs, API will find Missing or duplicate functionality Fails to handle error conditions gracefully:

• Stress
• Reliability
• Security
• Unused flags
• not implemented errors
• Inconsistent error handling
• Performance
• Multi-threading issues
• Improper errors.

68. What are the common tests performed on API’s?

Ans:

The common tests performed on API’s

• Verification of the API whether it is updating any data structure
• Verify if the API does not return anything
• Based on input conditions, returned values from the API’s are checked
• Verification of the API whether it triggers some other event or calls another API.

69. Mention what is the difference between PUT and POST?

Ans:

“PUT”puts a file or resource at a particular URI and exactly at that URI. If there is already a file or resource at that URI, PUT changes that file or resource. If there is no resource or file there, PUT makes one.

POST sends data to a particular URI and expects the resource at that URI to deal with the request. The web server at this point can decide what to do with the data in the context of the specified resource.

70. How to build secure microservice based application with IBM API connect?

Ans:

71. Mention what the main areas to be taken into consideration while writing an API document?

Ans:

• source of the content
• Document plan or sketch
• Delivery layout
• Information required for each function in the document
• Automatic document creation programs.

72. What are the main challenges of API testing?

Ans:

The main challenges in API testing is:

• Parameter Selection
• Parameter Combination
• Call sequencing.

73. What are the types of API?

Ans:

• Web APIs.
• Open APIs.
• Internal APIs.
• Partner APIs.
• Composite APIs.
• REST.
• JSON-RPC and XML-RPC.
• SOAP.

74. What is API testing with runscope?

Ans:

Runscope is a web application that provides backend services and an easy to use interface for testing APIs.

75. What is API testing?

Ans:

API (Application Programming Interface) specifies how some software components should interact with others, in other words it’s a set of functions and procedures that allows the creation of applications which access the features or data of an application or operating system. Testing of these functions is known as API testing.

76. Mention what are the different application integration styles?

Ans:

The different integration styles includes:

• Shared database
• Batch file transfer
• Invoking remote procedure (RPC)Swapping asynchronous messages over a message oriented middle-ware (MOM)

77. What are the tools used for API testing?

Ans:

The tools used for various API testing are:

• SoapUI Pro
• LoadUI Pro
• Alertsite API monitoring

78. What is Input injection and what are different ways of doing it?

Ans:

• Input Injection
• Direct Method Invocation
• Invocation using an accessibility interface
• Simulation using low-level input
• Simulation using a device driver
• Simulation using a robot

79. Explain what are the principles of API test design?

Ans:

The principle for API test design are:

Setup: Create objects, start services, initialize data etc

Execution: Steps to exercise API or scenario, also logging

Verification: Oracles to evaluate execution outcome

Reporting: Pass, failed or blocked

Clean up: Pre-test state

80. How to deploy NGINX API gateway?

Ans:

81. Explain how JAXB relates to RESTful web API?

Ans:

JAXB stands for java arch for xml binding.

82. Suppose you are writing an API document, what are the prime factors that you pay attention to?

Ans:

While writing an API, the very first thing to consider is to provide the source of the content so that it can be assured that the outcome will be free from any form of errors. Next is to pay attention to the Delivery Layout. Users also need to provide the information for all the functions present in the document.

83.While testing an API, is there always a need to test the entire API that is configured in the same file?

Ans:

No, there is no need for the same. This is because in a specific file, all API’s are similar in every aspect. Testing one means all others are tested.

84. Mention what is the difference between AJAX and REST?

Ans:

Ajax	Rest
In Ajax, the requests are sent to the server by using XMLHttpRequest objects. The response is used by the JavaScript code to dynamically alter the current page.	REST requires the interaction between the customer and server.

85. How can you say that API testing is different from UI level testing?

Ans:

Testing the graphical interface is generally considered as UI testing. It basically includes testing the ways users interact with the applications and its elements such as images. Its prime aim is to check whether the layout and the appearance of an application is fine or not. On the other side, API testing is meant to enable the communication among the software systems that are separate. Execution among different applications can be done through an API.

86. Name one feature about IBM API Connect that makes it the ideal option to consider for any form of development process in IT?

Ans:

The API connect is capable of handling multiple languages when it comes to development and supports all size applications. It is based on the frameworks of Node.js and Java and thus there is no need for the users to worry about anything when it comes to using them for the development and integration purposes.

87. What if one module of an API has data error in it? Can it be considered for further use?

Ans:

Errors are quite common in API’s. However, this doesn’t mean that you can proceed with them further. There is always a need to rectify the same for the purpose of integration. If modules have data errors, there are chances that the entire project may fail.

88. What are REST principles?

Ans:

The 5 principles of REST:

• Contract first approach
• Uniform Resource identifiers.
• Statelessness.
• Client-Server model.
• Layered architecture.

89. What is the REST paradigm?

Ans:

Representational state transfer (REST) is a software architectural style that was created to guide the design and development of the architecture for the World Wide Web. REST defines a set of constraints for how the architecture of an Internet-scale distributed hypermedia system, such as the Web, should behave.

90. How to Protecting API resources using mobile first in IBM?

Ans:

91. What is the full form of the REST API?

Ans:

Overview. A REST API (also known as RESTful API) is an application programming interface (API or web API) that conforms to the constraints of REST architectural style and allows for interaction with RESTful web services. REST stands for representational state transfer and was created by computer scientist Roy Fielding.

92. What is API data?

Ans:

API is an acronym for Application Programming Interface that software uses to access data, server software or other applications and have been around for quite some time. APIs use defined protocols to enable developers to build, connect and integrate applications quickly and at scale.

93. What is an API and how does it work?

Ans:

API stands for Application Programming Interface. An API is a software intermediary that allows two applications to talk to each other. In other words, an API is the messenger that delivers your request to the provider that you’re requesting it from and then delivers the response back to you.