Google Cloud Digital Leader GCDL Questions 826–829 | Page 12/12

826

Multi-Selectmedium

A media company needs to store and serve video files globally with high availability and low latency. They also need to process these videos using transcoding. Which THREE Google Cloud services should they use? (Choose 3)

Select 3 answers

A.Cloud Storage

B.Compute Engine

C.Transcoder API

D.Cloud CDN

E.BigQuery

AnswersA, C, D

Cloud Storage is the correct choice because it is a managed object storage service that provides highly durable and available storage for video files. With regional and multi-regional locations, it allows media to be stored globally and served directly via HTTP/HTTPS, with options like Google Cloud CDN for edge caching. It is purpose-built for holding large binary media assets like videos, unlike compute or analytics services.

Why this answer

Cloud Storage stores the video files. Cloud CDN caches content at edge locations. Transcoder API processes video transcoding.

Compute Engine is for general compute; BigQuery is for analytics; Cloud Run is for serverless apps.

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827

MCQeasy

What is a key business benefit of moving from a capital expenditure (CapEx) model for IT infrastructure to an operational expenditure (OpEx) model like pay-as-you-go cloud computing?

A.Improved cash flow by avoiding large upfront hardware purchases

B.Elimination of all IT staff

C.Reduced need for software licenses

D.Guaranteed performance improvement

AnswerA

Moving to cloud converts large, one-time capital expenditures for on-premises hardware into predictable operational expenditures. By avoiding significant upfront purchases of servers and storage arrays, organizations preserve cash for strategic investments and benefit from a pay-as-you-go model that spreads costs over the subscription period. This directly improves short-term cash flow, as monthly fees are generally lower than the initial capital outlay and can be matched to actual usage.

Why this answer

Pay-as-you-go eliminates large upfront hardware costs, converting them to variable costs based on usage, which improves cash flow and agility.

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828

MCQmedium

An e-commerce company plans its infrastructure for peak shopping events (e.g., Black Friday) which drive 50× normal traffic. On-premises, they must maintain 50× capacity year-round. In the cloud, they provision 50× capacity only during peak periods. Which cloud characteristic enables this cost optimization?

A.Measured service — metering and reporting resource consumption.

B.Elasticity — the ability to rapidly scale resources up during peak demand and release them when no longer needed.

C.Broad network access — accessing resources from any internet-connected device.

D.Resource pooling — the provider's resources are shared among many customers.

AnswerB

Elasticity is the ability to rapidly and automatically provision or release cloud resources in response to changing workload demand. In this case, the company scales to 50x capacity for the Black Friday peak, runs for that period, then scales back to the normal 1x baseline, so it only pays for the extra capacity when it is actually used. This avoids the cost of permanently over-provisioning a data center for a short-lived surge, which is exactly the cost optimization described.

Why this answer

Elasticity is the cloud characteristic that allows resources to be automatically provisioned to handle 50× peak traffic and then de-provisioned when demand subsides, eliminating the need to maintain idle capacity year-round. This contrasts with on-premises infrastructure, where capacity must be statically over-provisioned to handle peak loads, leading to significant cost inefficiency. The ability to scale out and scale in dynamically based on real-time demand is the core enabler of the described cost optimization.

Exam trap

The GCDL exam often tests the distinction between elasticity (dynamic scaling of resources for a single customer) and resource pooling (sharing of resources among multiple customers), leading candidates to confuse the multi-tenant efficiency of pooling with the on-demand scaling characteristic of elasticity.

How to eliminate wrong answers

Option A is wrong because measured service refers to metering and reporting resource consumption for billing and usage tracking, not the ability to dynamically adjust capacity to match demand. Option C is wrong because broad network access describes the capability to access resources from any internet-connected device via standard protocols (e.g., HTTPS, SSH), which is unrelated to scaling infrastructure for peak events. Option D is wrong because resource pooling involves the provider sharing its physical and virtual resources among multiple customers via a multi-tenant model, which improves provider efficiency but does not directly enable a single customer to scale their own resource allocation up and down on demand.

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829

MCQeasy

A startup is building a mobile app and needs a real-time database that synchronises data across user devices automatically. The data model is document-based, and the app needs offline support. Which database should they use?

A.Cloud Bigtable

B.Cloud SQL

C.Firestore

D.Memorystore

AnswerC

Firestore is a NoSQL document database with real-time synchronization built into its mobile SDKs, automatically pushing data changes to connected clients and persisting a local cache for offline operation. It resolves conflicts and syncs local writes when connectivity returns, enabling responsive, collaborative mobile experiences. Its flexible, schema-less document model maps naturally to app objects, making it the standard choice for real-time mobile apps.

Why this answer

Firestore is a NoSQL document database designed for mobile and web apps with real-time synchronization, offline support, and automatic multi-device sync. Cloud SQL is relational and not designed for mobile offline sync. Bigtable is for time-series.

Memorystore is a cache.

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Google Cloud Digital Leader (GCDL) — Questions 826–829