220-1201 Practice Question: That their cloud-based application is running…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

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  Bandwidth

  Why it's wrong here

  Bandwidth refers to the maximum amount of data that can be transmitted over a network connection in a given amount of time, typically measured in bits per second (bps). While insufficient bandwidth can certainly lead to slow application performance, the problem described, which is related to geographic distance, primarily manifests as a delay in data reaching its destination rather than a limitation on the volume of data that can be sent. Therefore, it addresses the capacity, not the time taken for a single piece of data to travel.

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  Elasticity

  Why it's wrong here

  Elasticity in cloud computing describes the ability of a system to automatically scale its computing resources, such as CPU, RAM, or storage, up or down in response to fluctuating demand. This dynamic adjustment ensures optimal performance and cost-efficiency by matching resource allocation to current workload requirements. However, elasticity does not mitigate performance degradation caused by the physical distance data must travel between the user and the cloud server, as it pertains to resource availability, not transmission delay.

• ✓

  Latency

  Why this is correct

  Latency is the time delay between when a data packet is sent from a source and when it is received at its destination, often measured in milliseconds (ms). In cloud-based applications, significant geographic distance between the end-user and the cloud server's data center directly increases this transmission delay, as data must travel further across the network infrastructure. This elevated latency results in a noticeable slowdown and unresponsiveness within the application, making it the primary factor for performance issues tied to server location.

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  Fault tolerance

  Why it's wrong here

  Fault tolerance is a system design principle that enables a system to continue operating without interruption even if one or more of its components fail. This is achieved through redundancy, where backup components or systems are ready to take over immediately in the event of a primary failure, ensuring high availability and reliability. While crucial for service uptime, fault tolerance does not address performance degradation caused by the physical distance between a user and a functional cloud server, as its focus is on preventing service outages, not optimizing data transmission speed over distance.

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