IBM Senior Systems Engineer Interview Questions and Answers

Angular lifecycle hooks manage component initialization, updates, and destruction, ensuring efficient rendering and resource management.

• ngOnInit: Called once after the first ngOnChanges. Ideal for initialization logic. Example: Fetching data from a service.

• ngOnChanges: Invoked before ngOnInit and whenever one or more data-bound input properties change. Example: Reacting to input changes.

• ngDoCheck: Called during ev...read more

WSDL and SOAP have different components that enable communication between web services.

• WSDL components include types, messages, port types, bindings, and services.

• SOAP components include envelope, header, body, and fault.

• WSDL describes the web service and SOAP defines the message format.

• WSDL is written in XML and SOAP messages are sent over HTTP.

• Examples of WSDL and SOAP can be found in popular web services like A...read more

Security patterns for SOAP and REST services

• Use HTTPS for secure communication

• Implement authentication and authorization mechanisms

• Use message encryption and decryption

• Implement input validation and output encoding

• Use rate limiting to prevent DoS attacks

• Implement logging and monitoring for security incidents

• Use OAuth for secure API access

• Implement CORS to restrict access from unauthorized domains

Spring Boot is a Java-based framework used for building standalone, production-grade applications.

• Spring Boot simplifies the process of creating and deploying Spring-based applications.

• It provides a set of pre-configured dependencies and an embedded web server.

• It also offers features like auto-configuration, which reduces the amount of boilerplate code needed.

• Spring Boot is widely used for building microservices a...read more

I am willing to adapt to new technologies and work environments.

• I am always eager to learn new things and keep myself updated with the latest trends in the industry.

• I am open to feedback and willing to make changes to improve my work.

• I am comfortable working in different environments and can quickly adapt to new situations.

• I am a team player and can work with people from diverse backgrounds and cultures.

• I am willi...read more

API error codes are numerical or alphanumeric codes that indicate an error occurred during API usage.

• Error codes help developers identify and troubleshoot issues with API requests and responses.

• Common error codes include 400 Bad Request, 401 Unauthorized, 404 Not Found, and 500 Internal Server Error.

• API providers may also create custom error codes specific to their API.

• Error codes may be accompanied by error messa...read more