Cloud Computing - Study Mode

[#431] The message in pub/sub is an opaque blob of . . . . . . . .
Correct Answer

(B) bytes
(F) bytes

Explanation

Solution: Option A: Bits are the smallest unit of data in computing, representing a binary value of either 0 or 1. While messages can ultimately be represented in bits, referring to a message as an "opaque blob" implies a larger and more complex data structure than individual bits. Option B: Bytes consist of 8 bits and are a more appropriate unit for describing a message in pub/sub systems. Messages in this context are often treated as opaque blobs of data, meaning the content is not interpreted by the pub/sub system itself. Instead, it is delivered as a sequence of bytes, allowing flexibility in the data format. Option C: Word generally refers to a data unit that varies in size depending on the architecture (e.g., 16, 32, or 64 bits). While a word is a valid data size, it is not commonly used to describe messages in pub/sub systems, where a more standardized unit like bytes is preferred. Option D: Nibble represents 4 bits and is not typically used to describe the size of messages in pub/sub systems. It is a smaller unit of data compared to bytes and is insufficient for encapsulating complex messages effectively. Conclusion: The correct answer is Option B: Bytes , as messages in pub/sub systems are typically described as opaque blobs of bytes, providing a flexible and efficient way to handle various types of data without interpretation by the messaging system.

[#432] CNS stands for . . . . . . . .
Correct Answer

(A) consumption near sweet-spot
(E) consumption near sweet-spot

Explanation

Solution: Option A: Consumption near sweet-spot is not a widely recognized term in cloud computing or networking contexts. While it suggests optimizing resource consumption, it does not accurately define what CNS typically stands for. Option B: Continuous network system could imply a system designed for uninterrupted network services, but it does not represent the common definition of CNS in the context of cloud computing. It lacks specificity and recognition in this field. Option C: Compact neural system is unrelated to cloud computing terminology. This term may refer to neural network architectures in machine learning, but it does not align with the standard definition of CNS in cloud contexts. Option D: Compound near sweet-spot is also not a recognized term in cloud computing. Similar to Option A, it suggests some form of optimization but does not define CNS correctly. Conclusion: None of the options accurately define CNS in the context of cloud computing. However, if the question aims to refer to a term often associated with network optimization, Option A might be the closest in concept, but it is still incorrect. The acronym CNS is generally understood to refer to "Cloud Networking Services," which is not listed here. Therefore, the question may require clarification, as none of the provided options are standard definitions for CNS.

[#433] URI and content type support is which protocol feature?
Correct Answer

http

Explanation

Solution: Option A: HTTP (Hypertext Transfer Protocol) is a protocol used for transferring hypertext requests and information on the internet. It supports URIs (Uniform Resource Identifiers) to locate resources and allows for specifying content types in HTTP headers, making this option relevant to the question. Option B: UDP (User Datagram Protocol) is a communication protocol used for sending messages across a network without establishing a connection. It does not support URIs or content types in the same way that application-layer protocols like HTTP do. Therefore, this option is not relevant to the question. Option C: CoAP (Constrained Application Protocol) is a specialized web transfer protocol for constrained devices and networks, often used in Internet of Things (IoT) applications. CoAP also supports URIs and can handle content types, making it a valid option for this question. Option D: SPI (Serial Peripheral Interface) is a protocol used for communication between microcontrollers and peripherals. It operates at a lower level than HTTP or CoAP and does not inherently support URIs or content types, making this option irrelevant. Conclusion: The correct answers are Option A: HTTP and Option C: CoAP , as both protocols support URI and content type features.

[#434] Processes on the remote systems are identified by . . . . . . . .
Correct Answer

(D) process id
(H) process id

Explanation

Solution: Option A: Host ID typically refers to a unique identifier for a host machine within a network. While it can help distinguish one machine from another, it does not specifically identify processes running on those systems, making this option inadequate. Option B: Host name and identifier combines both the name of the host and an additional identifier. Although it provides a way to locate a host, it does not directly relate to identifying specific processes running on the remote systems, thus making it less precise. Option C: Identifier is a general term that could refer to various types of identifiers, but it lacks specificity. It does not clarify what kind of identifier is being used to identify processes on remote systems, making this option vague. Option D: Process ID (PID) is a unique number assigned by the operating system to each running process. It specifically identifies processes on the system, whether local or remote, making this option the most accurate in the context of identifying processes. Conclusion: The correct answer is Option D: Process ID , as it accurately represents how processes on remote systems are identified. Process IDs are essential for managing and monitoring processes effectively, making them the most relevant choice in this context.

[#435] Which of the following is a system for creating block level storage devices that can be used for Amazon Machine Instances in EC2 ?
Correct Answer

(B) Amazon Elastic Block Store
(F) Amazon Elastic Block Store