D-CS-DS-23 Dell Cloud Services Design Practice Questions
Prepare for D-CS-DS-23 with more than an answer.
- Level
- Professional
Domains covered on the exam 7
- Transforming Traditional IT to Digital IT8%
- Cloud Services Lifecycle and Management15%
- Workforce Transformation for Cloud Services17%
- Multi-cloud Strategy for Cloud Services12%
- Cloud Services Operating Model23%
- Cloud-native Applications17%
- Business Resiliency Support for Cloud Services8%
- 1
A manufacturing company is adopting a 'fail fast' culture as part of its DevOps transformation. Which practice directly supports this cultural shift?
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Correct answer: B
A 'fail fast' culture relies on discovering problems as early and as quickly as possible. A CI/CD pipeline with automated testing achieves this by running tests on every code change, immediately notifying developers of integration issues, bugs, or security vulnerabilities. This rapid feedback loop allows failures to be identified and fixed when the cost of change is lowest, embodying the fail-fast principle.
- 2
A cloud architect is defining a data protection strategy for a stateful application running in Kubernetes. The strategy must protect against data corruption and accidental deletion. Which Dell Technologies solution is specifically designed for comprehensive data protection of modern, cloud-native applications?
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Correct answer: C
Dell PowerProtect Data Manager is a software-defined data protection platform that provides backup, recovery, and replication for workloads across physical, virtual, and cloud environments. It has specific integrations for protecting modern applications, including providing application-consistent backups for databases and protecting Kubernetes workloads, including persistent volumes.
- 3
During a cloud service design review, an architect presents the following diagram for a proposed web application architecture. The business requires high availability and the ability to scale the web tier independently of the application tier. Which cloud service lifecycle consideration is best demonstrated by this design?
graph TD subgraph "Internet" Users((Users)) end subgraph "Cloud Provider" LB_Web[Web Load Balancer] subgraph Web_Tier [Web Tier - Auto Scaling Group] Web1[Web Server 1] Web2[Web Server 2] Web3[Web Server 3] end LB_App[App Load Balancer] subgraph App_Tier [App Tier - Auto Scaling Group] App1[App Server 1] App2[App Server 2] end DB[(Database Cluster)] end Users --> LB_Web LB_Web --> Web_Tier Web_Tier --> LB_App LB_App --> App_Tier App_Tier --> DBShow answer details
Correct answer: C
The architecture diagram explicitly shows key components for achieving scalability and high availability. The use of load balancers distributes traffic across multiple instances, preventing a single point of failure. The auto-scaling groups for both the web and app tiers allow the system to automatically add or remove instances based on demand, ensuring performance (scalability) and replacing failed instances (high availability). This design directly addresses these critical planning considerations.
- 4
The primary purpose of value stream mapping in a digital IT context is to identify and eliminate waste in the process of delivering value to the customer.
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Correct answer: A
This statement is true. Value stream mapping (VSM) is a Lean management technique used to analyze the flow of materials and information required to bring a product or service to a customer. Its core goal is to visualize the current state, identify sources of waste (e.g., delays, handoffs, rework), and design a future state that minimizes this waste, thereby reducing lead time and increasing efficiency.
- 5
A software company is deploying its cloud-native application across multiple geographic regions in both AWS and Azure. To ensure consistent and repeatable deployments, they use a Git repository as the single source of truth for the desired state of their infrastructure and applications. Changes to the Git repository automatically trigger a reconciliation process that updates the live environment. What is this practice called?
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Correct answer: C
GitOps is an operational framework that takes DevOps best practices used for application development, such as version control, collaboration, compliance, and CI/CD, and applies them to infrastructure automation. The core idea is to have a Git repository that always contains declarative descriptions of the infrastructure currently desired in the production environment and an automated process to make the production environment match the described state in the repository.
- 6
A financial services firm is adopting a cloud operating model and wants to implement Infrastructure as Code (IaC) using Terraform. The development team is distributed globally. During initial testing, developers storing the
terraform.tfstatefile on their local machines caused frequent overwrites and configuration drift. Which action represents the most robust and secure solution to this problem?Show answer details
Correct answer: B
Using a remote backend is the standard best practice for teams using Terraform. It provides a centralized, consistent location for the state file. Crucially, features like state locking prevent multiple users from running
terraform applysimultaneously, avoiding race conditions and state corruption. Enabling server-side encryption adds a critical layer of security for the sensitive information often contained in state files. - 7
A development team is building a new cloud-native application. They have embedded database connection strings, API keys, and other credentials directly into their container images for simplicity. Which two Twelve-Factor App principles are being violated by this practice? (Select TWO)
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Correct answer: B, D
Factor III (Config) states that configuration which varies between deploys (development, staging, production) should be stored in the environment. Hardcoding credentials into the container image violates this, as the image would need to be rebuilt for each environment.
Factor V (Build, release, run) demands strict separation between these stages. By embedding environment-specific configuration into the container image, the build stage is being contaminated with configuration that belongs in the release stage. A single build (image) should be promotable to any environment by applying the correct external configuration.
- 8
A large enterprise is struggling with a siloed organizational structure where Development, QA, and Operations teams work independently. This has resulted in long deployment cycles, frequent integration issues, and a culture of blame. As a cloud architect, which organizational change is most critical for a successful workforce transformation towards a cloud-native model?
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Correct answer: C
The core principle of a cloud-native and DevOps-oriented workforce transformation is to break down silos. Creating cross-functional teams where developers, QA engineers, and operations specialists work together on a specific product fosters collaboration, shared responsibility, and faster feedback loops. This directly addresses the problems of long cycles and blame culture.
- 9
A European retail company wants to leverage services from both AWS and Azure to avoid vendor lock-in and use best-of-breed services for analytics and AI. They also need to maintain a private cloud for processing sensitive customer data in their on-premises data center. Which term best describes their overall cloud strategy?
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Correct answer: D
This strategy incorporates elements of both hybrid and multi-cloud. It is 'hybrid' because it combines a private cloud (on-premises data center) with public clouds. It is 'multi-cloud' because it uses more than one public cloud provider (AWS and Azure). Therefore, 'Hybrid Multi-cloud' is the most precise and comprehensive term for this architecture.
- 10
A team is conducting a value stream mapping exercise for their software delivery process. They have identified several stages and the average time spent in each. The analysis reveals that a feature request waits in a backlog for 30 days before development starts, development takes 5 days, testing takes 3 days, and deployment takes 1 day. However, the code spends 10 days waiting for a manual security review between development and testing. What is the lead time for this process?
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Correct answer: C
Lead time in value stream mapping is the total time from the initial request to the final delivery. It includes both value-added time (active work) and non-value-added time (wait time). The calculation is: 30 days (backlog wait) + 5 days (development) + 10 days (security review wait) + 3 days (testing) + 1 day (deployment) = 49 days.
