IBM PHP Programmer Interview Questions and Answers for Experienced

SOAP is a protocol while REST is an architectural style for web services.

• SOAP uses XML for messaging while REST uses JSON or XML.

• SOAP requires more bandwidth and processing power than REST.

• SOAP has built-in error handling while REST relies on HTTP error codes.

• SOAP supports both stateful and stateless communication while REST is stateless.

• SOAP is commonly used in enterprise applications while REST is used for web-based ...read more

REST supports methods like GET, POST, PUT, DELETE, PATCH, OPTIONS, HEAD.

• GET - retrieves a resource

• POST - creates a new resource

• PUT - updates an existing resource

• DELETE - deletes a resource

• PATCH - partially updates a resource

• OPTIONS - returns the supported methods for a resource

• HEAD - returns metadata about a resource

One way SSL is unidirectional while two way SSL is bidirectional.

• One way SSL only authenticates the server to the client while two way SSL authenticates both the server and the client to each other.

• One way SSL uses only server certificate while two way SSL uses both server and client certificates.

• One way SSL is commonly used in websites while two way SSL is used in applications that require higher security such as onli...read more

Public key is used for encryption and private key is used for decryption.

• Public key is shared with others to encrypt messages.

• Private key is kept secret and used to decrypt messages.

• Public key is used in digital signatures to verify authenticity.

• Examples include RSA, DSA, and Elliptic Curve Cryptography.

• Public key is longer than private key for added security.

Cloud refers to the delivery of computing services over the internet.

• Cloud computing allows users to access data and applications from anywhere with an internet connection.

• It offers scalability, flexibility, and cost-effectiveness compared to traditional on-premises computing.

• Examples of cloud services include Amazon Web Services, Microsoft Azure, and Google Cloud Platform.

Public cloud is accessible to everyone while private cloud is restricted to a specific organization.

• Public cloud is owned and operated by third-party providers while private cloud is owned and operated by the organization itself.

• Public cloud is accessible over the internet while private cloud is accessible only within the organization's network.

• Public cloud is more cost-effective for small businesses while private clou...read more

OAuth 2.0 is an authorization framework that allows third-party applications to access user data without sharing passwords.

• OAuth 2.0 is used for authentication and authorization.

• It allows users to grant access to their resources stored on one site to another site.

• It uses access tokens to grant access to resources.

• Examples of OAuth 2.0 providers include Google, Facebook, and Twitter.

OAuth 2.0 is used for secure authorization and authentication in various applications.

• OAuth 2.0 is used by Google to allow third-party applications to access user data without sharing passwords.

• It is used by Facebook to allow users to log in to other websites using their Facebook credentials.

• It is used by Microsoft to allow users to grant access to their Office 365 data to third-party applications.

• OAuth 2.0 is also use...read more

SSL can be configured at HTTP layer by enabling HTTPS protocol and configuring SSL certificates.

• Enable HTTPS protocol in web server configuration

• Generate or obtain SSL certificates

• Configure SSL certificates in web server

• Ensure secure communication between client and server

• Test SSL configuration for any vulnerabilities