200-901 Exam Dumps and Practice Questions

JSON (JavaScript Object Notation) and XML (eXtensible Markup Language) are both used for data interchange but have different characteristics:

Human Readability: JSON is often considered more human-readable because it is more concise and closely resembles the structure of programming languages like JavaScript.

Support for Arrays: JSON natively supports arrays, making it straightforward to represent lists of values. XML can represent arrays, but it does not do so natively and requires additional markup to represent arrays.

Data Mapping: XML provides extensive support for mapping data structures, including attributes and mixed content, making it suitable for complex data structures.

Data Types: JSON is lighter and provides sufficient data types for many applications (strings, numbers, objects, arrays, booleans, and null), whereas XML can be more verbose and supports a broader range of data types.

JSON vs XML - W3Schools

The YAML data provided is converted to JSON format. YAML and JSON are both data serialization formats, and the conversion involves retaining the structure and values of the original YAML dat

a. The JSON format uses braces {} and brackets [] to denote objects and arrays, respectively.

The EXPOSE instruction in a Dockerfile informs Docker that the container listens on the specified network ports at runtime.

EXPOSE Instruction: It does not publish the port but indicates to Docker that the application inside the container uses this port.

Listening Port: The Docker container will be configured to listen on port 5000 using EXPOSE 5000.

Dockerfile Reference: Dockerfile EXPOSE

Latency refers to the delay between a client request and a server response. A large distance between a client device and a host server increases the latency due to the time it takes for data to travel over the network.

Latency: The time delay experienced in a system, particularly in networking, where it refers to the time taken for data to travel from the source to the destination.

Impact: High latency can result in slow response times, negatively impacting the performance of applications, especially those requiring real-time interactions.

Network Latency Overview: Network Latency

The EXPOSE instruction in a Dockerfile informs Docker that the container listens on the specified network ports at runtime. This does not publish the ports to the host machine, but it allows them to be connected to from other containers.

A . Local port 8080 of the container that launched with this docker image is accessible from co-hosted containers and external clients - Incorrect. The EXPOSE instruction does not make the port accessible to external clients. B. Local port 8080 is not reachable at all because no IP address is specified along with the EXPOSE command of the Dockerfile - Incorrect. The EXPOSE instruction does not require an IP address. C. Local port 8080 is accessible from other containers running on the same docker host as the container that launched with this docker image - Correct. The EXPOSE instruction makes the port available for inter-container communication. D. Local port 8080 of the container that launched with this docker image is accessible to external clients - Incorrect. The EXPOSE instruction does not publish the port to external clients.

Dockerfile reference - EXPOSE