Cisco 300-640 questions and answers

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Cisco 300-640 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: AI Infrastructure Fundamentals	20%	- Describe AI use cases in data center environments - Describe AI and machine learning concepts - Describe types of AI infrastructure: on-premises, cloud, hybrid, edge - Explain Cisco AI infrastructure solutions and portfolio - Describe core components of AI infrastructure: network, compute, storage, orchestration, monitoring
Topic 2: AI Infrastructure Deployment and Data Management	30%	- Configure high-performance networks for AI: Cisco Nexus, NDFC, lossless fabrics - Integrate AI frameworks and applications with Cisco infrastructure - Deploy and manage AI infrastructure with orchestration tools - Configure compute and storage using Cisco UCS: profiles, policies, Intersight - Implement data management and lifecycle for AI workloads
Topic 3: AI Infrastructure Components and Architecture	30%	- Evaluate storage requirements: capacity, performance, data pipelines, distributed architectures - Evaluate network requirements for AI workloads: bandwidth, latency, congestion control, RoCEv2, QoS - Evaluate power, cooling, and efficiency requirements - Evaluate hybrid and multi-cloud AI integration - Evaluate compute requirements: CPU, GPU, NVLink, virtualization, containerization, scalability
Topic 4: AI Infrastructure Operations and Troubleshooting	20%	- Monitor infrastructure: Nexus Dashboard, Intersight, telemetry, alerts - Implement performance benchmarking and validation - Manage health, logs, and events - Troubleshoot network, compute, storage, and orchestration issues - Optimize performance, security, and reliability

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Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions (Q77-Q82):

NEW QUESTION # 77
A customer deploys a UCS 885a server in a data center with two power grids. Three of the
3000W power supplies in the server connect to each grid. Due to an external event, one of the grids will be shut down for maintenance. How does the server respond to this event?

A. The server immediately shuts down and stops all operations.
B. The server continues to operate at full performance using redundant power supplies, but the PSU status LED glows solid amber.
C. The server operates with reduced performance and caps power to GPUs at 60%.
D. The server initiates a graceful shut down of the operating system.

Answer: C

Explanation:
With three 3000W power supplies lost from one power grid, the UCS C885A continues operating on the remaining grid but no longer has the full power budget available for maximum GPU operation. The server reduces performance by enforcing power limits, including capping GPU power, so workloads can continue running within the available power capacity.

NEW QUESTION # 78
An engineer configures Cisco Nexus Dashboard Fabric Controller for AI infrastructure automation. The company wants centralized policy management and simplified fabric provisioning across multiple pods. Which capability provides this benefit?

A. Distributed ACL processing
B. Local VLAN switching
C. Manual CLI consistency checks
D. Intent-based fabric automation

Answer: D

Explanation:
Intent-based fabric automation simplifies deployment and policy consistency across large AI infrastructures. Nexus Dashboard Fabric Controller automates provisioning, validation, and operational management. Distributed ACLs and local VLAN switching are operational features but do not centralize orchestration. Manual CLI verification is error-prone and unsuitable for rapidly scaling AI environments.

NEW QUESTION # 79
To support growing AI workload requirements, a regional medical practice is adding new X9516 X-Fabric module, UCS PCI Mezz cards, and UCS X580p PCIe nodes to their existing X-Series chassis. Which two administrative actions must be taken before the X-Fabric module is added to the chassis? (Choose two.)

A. Install UCS PCI Mezzanine cards in X-Series blades.
B. Disconnect cabling between IFMs and fabric interconnects.
C. Power down all blades that would connect to the X-Fabric modules.
D. Power down all IFMs in the chassis.
E. Disconnect device connector.

Answer: A,C

Explanation:
Before adding the X9516 X-Fabric module, the affected X-Series blades must be powered down because the X-Fabric connectivity path requires hardware installation and cannot be safely introduced while the connected compute nodes are running. The UCS PCI Mezzanine cards must also be installed in the blades so they can physically connect through the X-Fabric module to the X580p PCIe nodes for GPU expansion.

NEW QUESTION # 80
A data center operator configures telemetry streaming on Cisco Nexus switches. What is the primary operational advantage over traditional SNMP polling?

A. Increased packet fragmentation
B. Mandatory hardware replacement
C. Real-time visibility with lower overhead
D. Elimination of routing tables

Answer: C

Explanation:
Streaming telemetry continuously exports operational data in near real time, improving visibility and reducing polling overhead compared to SNMP. AI infrastructures require rapid monitoring of congestion and latency conditions. Telemetry does not remove routing tables or require hardware replacement.

NEW QUESTION # 81
How does RAG enhance the capabilities of LLMs?

A. by removing the data preparation and cleaning step
B. by removing inherent biases from LLM outputs
C. by retaining the LLM by altering its core parameters
D. by providing access to proprietary data

Answer: D

Explanation:
RAG enhances LLMs by retrieving relevant external or proprietary information at generation time and using that context to produce more accurate, current, and domain-specific responses without changing the model's core parameters.

NEW QUESTION # 82
......

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