350-901 Developing Applications using Cisco Core Platforms and APIs (DEVCOR) Questions and Answers

An enterprise refactors its monolithic application into a modem cloud-native application that is based on microservices. A key requirement of the application design is to ensure that the IT team is aware of performance issues or bottlenecks in the new application Which two approaches must be part of the design considerations'' (Choose two.)

Drag and drop the code from the bottom onto the box where the code is missing to permit network traffic between 10.0.0.0/8 and all other networks on port 80 for a Cisco Nexus 9000 switch by using the Puppet module. Not all options are used.

Refer to the exhibit.

Which code snippet is required in the headers to successfully authorize wireless information from Cisco DNA Center?

Refer to the exhibit.

Drag and drop the code from the bottom onto the box where the code is missing to construct a Python script that will retrieve location data Not all options are used.

A user is receiving a 429 Too Many Requests error. Which scheme is the server employing that causes this error?

A development team is looking for a tool to automate configurations across the infrastructure. The tool must have these characteristics:

•written in Python

•define playbooks (or intent

•stateless

•imperative

Which tool meets these requirements?

Drag and drop the characteristics from the left onto the correct data processing techniques on the right, in the context of GDPR.

A developer is creating a Python script to use the Webex Teams REST API to list joined spaces, and gracefully handle and print the errors it receives. Drag and drop the code snippets from the left onto the item numbers on the right that match the missing sections in the exhibit to complete the script.

Where should distributed load balancing occur in a horizontally scalable architecture?

Which HTTP status code indicates that a client application is experiencing intentional rate limiting by the server?

An application has initiated an OAuth authorization code grant flow to get access to an API resource on behalf of an end user.

Which two parameters are specified in the HTTP request coming back to the application as the end user grants access? (Choose two.)

There is a requirement to securely store unique usernames and passwords. Given a valid username, it is also required to validate that the password provided is correct. Which action accomplishes this task?

A developer must deploy a containerized application foe network device inventory management. The developer sets up a Kubernetes duster on two separate hypervisors. The SLA is not currently meeting a specified maximum value for network latencyjitter CPU/memory and disk I/O are functioning property. Which two design approaches resolve the issue'' (Choose two.)

A developer corrects an application bug with ID buglDa98416945110x and then installs it on a Cisco Catalyst 9300 series switch. Which command will enable the application called myapp?

{'lat': 37.4180951010362, 'lng': -122.098531723022, 'address': '', 'serial': 'Q2HP-F5K5-F98Q',

'mac': '88:15:44:ea:f5:bf', 'lanIp': '10.10.10.15',

'url': 'https://n149.meraki.com/DevNet-Sandbox/n/EFZDavc/manage/nodes/new_list/78214561218351',

'model': 'MS220-8P', 'switchProfileId': None, 'firmware': 'switch-11-31', 'floorPlanId': None}

Refer to the exhibit. A developer needs to find the geographical coordinates of a device on the network L_397561557481105433 using a Python script to query the Meraki API. After running response = requests.get() against the Meraki API, the value of response.text is shown in the exhibit.

What Python code is needed to retrieve the longitude and latitude coordinates of the device?

Which security approach should be used for developing a REST API?

A network engineer needs to retrieve interface data using the Cisco IOS XE YANG Model. Drag and drop the

components from the bottom onto the box where the code is missing to complete the RESTCONF URI. Not all

options are used.

Refer to the exhibit.

This script uses ciscoyang to configure two VRF instances on a Cisco IOS-XR device using the Yang NETCONF type.

Which two words are required to complete the script? (Choose two.)

Refer to the exhibit.

Drag and drop the code from the bottom onto the box where the code is missing in the script to read from a .csv file and import the host entries. The script uses the Cisco Firepower API to create the appropriate entries. The script will be used as part of the security analysis dashboard application to visualize data about network security and host information. Not all options are used.

Refer to the exhibit. Which snippet creates a Webex Teams space and adds the users in the variable user list to that space?

A)

B)

C)

D)

Drag and drop the REST API authentication method from the left to the description on the right

A Cisco Catalyst 9000 switch has guest shell enabled. Which Linux command installs a third-party application?

Refer to the exhibit. The code fetches the latest order from the purchases table for a specific user. An engineer needs to pass query parameters to the execute function to prevent an SQL injection attack. Which code snippet must be placed in the blank in the code to meet this requirement?

A)

B)

C)

D)

Refer to the exhibit.

Cisco IOS XE switches are used across the entire network and the description that is filed for all interfaces must be configured. Which code snippet must be placed in the blank in the script to leverage RESTCONF to query all the devices in the device list for the interfaces that are present?

A)

B)

C)

D)

A developer plans to create a new bugfix branch to fix a bug that was found on the release branch. Which command completes the task?

Drag and drop the code from the bottom onto the box where the code is missing to retrieve and display wireless network hearth information. The wireless network devices are being managed by Cisco DNA Center and are compatible with REST API Not all options are used.

User report that they can no longer process transactions with the online ordering application, and the logging dashboard is displaying these messages.

Fri Jan 10 19:37:31.123 EST 2020 [FRONTEND] INFO: Incoming request to add item to cart from user 45834534858

Fri Jan 10 19:37:31 247 EST 2020 [BACKEND] INFO: Attempting to add item to cart

Fri Jan 10 19:37:31 250 EST 2020 [BACKEND] ERROR: Failed to add item: MYSQLDB ERROR: Connection refused

What is causing the problem seen in these log messages?

A developer is working on a live project and must apply a new feature. After the commit,the manager informs the team that the wrong file was applied. The developer must undo the single commit and apply the file with the name feature-App-UXU1411841916ADD. Which command must the developer use?

Refer to the exhibit.

A kubeconfig file to manage access to clusters is provided. How many clusters are defined and which of them are accessed using username/password authentication versus certificate?

An application is being built to collect and display telemetry streaming data. Drag and drop the elements of this stack from the left onto the correct element functions on the right.

A developer is creating a Python script to catch errors using REST API calls and to aid in debugging. Drag and drop the code from the bottom onto the box where the code is missing to implement control flow for REST API errors. Not all options are used.

Which two techniques protect against injection attacks? (Choose two.)

A client is written that uses a REST API to interact with a server. Using HTTPS as the transport, an HTTP request is sent and received an HTTP response. The response contains the HTTP response status code: 503 Service Unavailable.

Which action is the appropriate response?

What is the function of dependency management?

Refer to the exhibit.

An engineer is managing a network that consists of Cisco IOSXE devices. There is a need to retrieve the details of the interface GigabitEthernet2 using RESTCONF. Which URI will accomplish this by providing the same response as shown in the JSON body?

A)

B)

C)

D)

Which two design considerations should be considered when building a Cisco Meraki dashboard out of available APIs? (Choose two,)

A developer is designing an application that uses confidential information for a company and its clients. The developer must implement different secret storage techniques for each handled secret to enforce security policy compliance within a project. Drag and drop the security policy requirements from the left onto the storage solutions on the right

Refer to the exhibits. An interface named “GigabitEthernet2” has been configured on a Cisco IOS XE device. Using RESTCONF APIs as defined by the ietf-interfaces@2014-05-08.yang model, which two combinations of “rest_operation” and “payload” must be added to the Python script to set the “description” to “Configured by RESTCONF”? (Choose two.)

The UCS Python SDK includes modules for Service Profile template creation. Which two UCS Service Profile template types are supported? (Choose two.)

Refer to the exhibit.

An architect wrote an application to collect device information from the Cisco Meraki Dashboard API. Every time a network change occurs the application collects information and records new endpoint MAC addresses. The application stopped working after the locations and network equipment of a competitor were acquired. Which application approach must be applied to reduce latency and rate limiting?

A timeframe custom dashboard must be developed to present data collected from Cisco Meraki. The dashboard must include a wireless health alert count. What needs to be built as a prerequisite?

Which two methods are API security best practices? (Choose two.)

What is a benefit of running multiple instances of a back-end service and using load balancing to distribute the communication between the front-end and back-end services?

Drag and drop the code from the bottom onto the box where the code is missing to retrieve a summary of physical compute resources. The collected information about the compute resources will be presented in a dashboard to be developed for device monitoring purposes. Not all snippets are used.

Refer to the exhibit.

A Docker swarm cluster is configured to load balance services across data centers in three different geographical regions west central and east. The cluster has three manager nodes and three worker nodes Anew service named cisco.devnet is being deployed. The service has these design requirements

• All containers must be hosted only on nodes in the central region

• The service must run only on nodes that are ineligible for the manager role

Which approach fulfills the requirements?

Refer to the exhibit.

Which RESTCONF verb changes the GigabitEthernet2 interface from 192.168.100.1/24 to 10.10.10.1/24

Refer to the exhibit.

Which action should be performed to avoid an SQL injection attack?

An organization manages a large cloud-deployed application that employs a microservices architecture. No notable issues occur with downtime because the services of this application are redundantly deployed over three or more data center regions. However, several times a week reports are received about application slowness. The container orchestration logs show faults in a variety of containers that cause them to fail and then spin up brand new.

Which action must be taken to improve the resiliency design of the application while maintaining current scale?

Refer to the exhibit Drag and drop the code from the bottom onto the box where the code is missing to query the last 10 Bluetooth clients seen by APs in their network using the Meraki Dashboard API Not all options are used.

Refer to the exhibit.

An engineer is implementing the response for unrecoverable REST API errors. Which message needs to be placed on the snippet where the code is missing to complete the print statement?

What is a benefit of implementing a Cl pipeline?