Sample Questions and Answers
How do you implement API rate limiting within a Heroku app integrating with Salesforce?
A) Track API usage per user/session and throttle requests before reaching Salesforce limits, returning appropriate error messages
B) Do not limit API usage
C) Let Salesforce reject excess calls without notification
D) Fail silently on rate limits
Answer: A
Explanation: Client-side throttling prevents hitting external API limits.
Which Heroku logging add-on supports real-time log analysis and alerting?
A) Papertrail provides live log tailing, search, and alert configuration
B) Heroku Scheduler only runs jobs
C) Heroku Postgres logs are unrelated
D) Logplex discards logs immediately
Answer: A
Explanation: Real-time logging helps detect and respond to issues quickly.
What is the advantage of using Heroku Private Spaces for Salesforce-Heroku integrations?
A) Provides isolated network environment with private IPs, VPN connectivity, and enhanced security controls suitable for enterprise compliance
B) Public internet access only
C) No security benefits
D) Limits app scalability
Answer: A
Explanation: Private Spaces are ideal for sensitive, regulated workloads.
How can you implement multi-region redundancy for Heroku apps syncing Salesforce data?
A) Deploy apps and databases across multiple regions, replicate data asynchronously, and use DNS-based routing for failover
B) Single-region deployment only
C) Rely on Heroku default region
D) Multi-region is unsupported
Answer: A
Explanation: Multi-region setups increase availability and disaster resilience.
How do Heroku Dyno Metadata and Runtime API help in dynamic configuration?
A) Provide environment info like dyno ID, release version, and app name, enabling dynamic behavior based on deployment context
B) Provide no runtime info
C) Are disabled by default and useless
D) Only used for billing
Answer: A
Explanation: Metadata enables smarter app behavior per deployment.
Which approach is best for managing secrets rotation in Heroku apps?
A) Automate rotation with external secrets manager integrations (e.g., HashiCorp Vault) and update Heroku Config Vars via API without downtime
B) Manual rotation once a year
C) Never rotate secrets
D) Hardcode secrets
Answer: A
Explanation: Automated rotation improves security posture.
How can you improve response times of Heroku apps integrating with Salesforce?
A) Implement caching layers (e.g., Redis) to reduce repetitive API calls and serve frequent queries faster
B) Always fetch data live from Salesforce on every request
C) Avoid caching
D) Disable concurrency
Answer: A
Explanation: Caching reduces latency and API load.
What is a key feature of Heroku Connect in the context of Salesforce integration?
A) Bi-directional data sync between Salesforce objects and Heroku Postgres tables, enabling seamless data sharing
B) One-way data export only
C) Syncs only metadata
D) No sync capabilities
Answer: A
Explanation: Heroku Connect bridges Salesforce and Heroku app data.
How does implementing a circuit breaker pattern in a Heroku app interacting with Salesforce APIs improve reliability?
A) It prevents overwhelming the API during failures by temporarily halting calls and allowing graceful recovery
B) Immediately retries failed calls endlessly
C) Ignores failures and continues calls
D) Degrades app performance
Answer: A
Explanation: Circuit breakers help avoid cascading failures.
What role does Heroku Autoscaling play in managing application load?
A) Automatically adjusts dyno count based on traffic metrics to maintain performance and cost efficiency
B) Requires manual scaling only
C) Has no effect on load
D) Scales storage only
Answer: A
Explanation: Autoscaling dynamically manages capacity.
What is the function of the Heroku Release Phase in deployment?
A) Runs scripts like database migrations or setup tasks before the new release is deployed to dynos
B) Starts dynos immediately
C) Handles backups
D) Rolls back releases automatically
Answer: A
Explanation: Ensures deployment steps happen before app runs.
How can you improve security when connecting Heroku apps to Salesforce using OAuth?
A) Use JWT Bearer Token flow with certificates to avoid storing passwords and enable short-lived tokens
B) Use password grant flow with stored passwords
C) Use no authentication
D) Hardcode tokens
Answer: A
Explanation: JWT flow enhances security with cert-based auth.
How do you handle large volumes of inbound webhook events from Salesforce to Heroku?
A) Use a queueing system (e.g., Heroku Redis, Kafka) to buffer and process events asynchronously to prevent overload
B) Process webhooks synchronously only
C) Ignore webhook failures
D) Process events directly in web request handlers
Answer: A
Explanation: Queues improve reliability and scalability.
What is the main benefit of structured logging in Heroku apps?
A) Facilitates efficient log parsing, filtering, and automated alerting in log aggregation systems
B) Logs are unreadable
C) Reduces log verbosity
D) Disables logging
Answer: A
Explanation: Structured logs enable powerful analysis.
How do you ensure data privacy when storing Salesforce data in Heroku Postgres?
A) Use column-level encryption, restrict access, and enforce network isolation via Private Spaces
B) Store data unencrypted publicly
C) Share database credentials broadly
D) No data protection needed
Answer: A
Explanation: Encryption and isolation safeguard sensitive info.
What approach helps ensure high availability for Salesforce integrations in Heroku?**
A) Implement retries with exponential backoff, circuit breakers, and fallback logic for degraded modes
B) Fail fast without retries
C) Ignore errors
D) Only manual intervention
Answer: A
Explanation: Resilient patterns improve uptime and user experience.
How do Heroku Review Apps improve the development workflow for Salesforce integrations?
A) Provide ephemeral, isolated environments that mirror production allowing integration testing before merging code
B) Use production environment only
C) No isolated testing
D) Only run tests locally
Answer: A
Explanation: Review Apps reduce integration risk by enabling safe testing.
What is the recommended way to protect sensitive configuration data such as Salesforce client secrets in Heroku?
A) Store them in Heroku Config Vars, never in source code or logs, and restrict access via Heroku team permissions
B) Commit them to the Git repository
C) Store in plaintext files on dynos
D) Share secrets via email
Answer: A
Explanation: Config Vars are encrypted and secure; storing secrets in code is a security risk.
How can you restrict inbound network access to a Heroku app for enhanced security?
A) Deploy the app in a Heroku Private Space, which allows IP whitelisting and VPN connectivity
B) Allow all traffic from the internet
C) Use public apps only
D) Rely on Heroku firewall defaults without changes
Answer: A
Explanation: Private Spaces enable fine-grained network controls.
What OAuth flow is best suited for server-to-server Heroku-Salesforce communication without user interaction?
A) JWT Bearer Token flow, which uses signed certificates for secure, unattended authentication
B) Authorization code flow requiring user login
C) Password grant with stored passwords
D) No OAuth flow
Answer: A
Explanation: JWT flow avoids storing passwords and supports automated auth.
How does Heroku recommend handling API tokens to avoid accidental exposure?
A) Use environment variables (Config Vars) and rotate tokens regularly; avoid logging or embedding in code
B) Hardcode tokens in source
C) Share tokens with all team members openly
D) Never rotate tokens
Answer: A
Explanation: Protecting tokens reduces risk of compromise.
How can you encrypt data at rest in Heroku Postgres to protect Salesforce data?
A) Use Heroku’s built-in Transparent Data Encryption (TDE) and enable column-level encryption in your application
B) Store data unencrypted
C) Rely only on database backups
D) Encryption is not needed
Answer: A
Explanation: Encryption at rest protects data in case of storage compromise.
What practice ensures secure inter-service communication in a Heroku Private Space?
A) Use mutual TLS (mTLS) and IP whitelisting to verify identities and encrypt traffic internally
B) Use unencrypted HTTP
C) Allow traffic from any IP
D) Disable all encryption internally
Answer: A
Explanation: mTLS strengthens service-to-service trust and confidentiality.
How does the OAuth scope parameter contribute to security in Salesforce API integration?
A) Limits the permissions granted to the Heroku app, enforcing least privilege access to Salesforce data and actions
B) Grants unlimited access by default
C) Is unrelated to security
D) Disables access control
Answer: A
Explanation: Scopes restrict what the app can do, minimizing risk.
How do you prevent CSRF attacks in Heroku web apps that integrate with Salesforce?
A) Implement anti-CSRF tokens and validate them on every state-changing request
B) Ignore CSRF protection
C) Use GET requests for all state changes
D) Disable session management
Answer: A
Explanation: Anti-CSRF tokens are standard defense against forgery.
What is a secure method to handle Salesforce Platform Event subscriptions in Heroku?
A) Use authenticated CometD clients with TLS and replay tokens to prevent message spoofing and loss
B) Use unsecured WebSocket connections
C) Subscribe without authentication
D) Poll REST API instead
Answer: A
Explanation: Secure, authenticated event consumption ensures data integrity.
How can you audit access to sensitive Salesforce data stored on Heroku?
A) Enable detailed logging in the app and Heroku Postgres, use third-party audit tools, and monitor Config Vars access
B) No auditing is required
C) Audit only Salesforce access logs
D) Audit manually every month
Answer: A
Explanation: Audit trails support compliance and incident investigation.
What role does Heroku Shield play in securing apps handling sensitive Salesforce data?
A) Provides compliance-grade security with features like encrypted Postgres, Private Spaces, and strict network controls
B) Is a performance optimization tool only
C) Enables public access
D) Offers no additional security
Answer: A
Explanation: Shield supports HIPAA, PCI, and other regulatory requirements.
Why should secrets never be stored in Heroku buildpacks or source code?
A) They can be exposed in version control or build logs, risking unauthorized access
B) They are automatically encrypted there
C) It is recommended to store them there
D) Buildpacks hide secrets by default
Answer: A
Explanation: Secrets in code are a common cause of breaches.
What approach should be used to handle user authentication for a Heroku app integrated with Salesforce Identity?
A) Use Salesforce as an identity provider with SAML or OpenID Connect for single sign-on (SSO)
B) Manage separate user accounts in the app only
C) Use basic auth with no federation
D) No authentication needed
Answer: A
Explanation: SSO improves security and user experience.
How can Heroku apps ensure secure logging practices?
A) Avoid logging sensitive info such as passwords or tokens and use structured logs with redaction where needed
B) Log all request and response data fully
C) Disable logs altogether
D) Share logs openly
Answer: A
Explanation: Secure logging protects privacy and compliance.
What is the impact of Heroku’s ephemeral filesystem on sensitive data storage?
A) Files stored locally are lost on dyno restart; do not store sensitive data locally, use secure external storage instead
B) Data persists permanently
C) Files are backed up automatically
D) Ephemeral filesystem encrypts files
Answer: A
Explanation: Ephemeral storage is unsuitable for sensitive data persistence.
How can you enforce least privilege principle in Heroku apps accessing Salesforce?
A) Use scoped OAuth tokens with minimal permissions and segregate duties between app components
B) Grant admin privileges by default
C) Use a single token for all access
D) Avoid using OAuth scopes
Answer: A
Explanation: Least privilege limits exposure from compromised credentials.
What is a secure way to update Heroku Config Vars in CI/CD pipelines?
A) Use Heroku API with access tokens stored securely in CI secrets vaults and avoid printing secrets in logs
B) Hardcode Config Vars in scripts
C) Commit Config Vars in source control
D) Pass secrets in plain text in logs
Answer: A
Explanation: Secure management avoids accidental leaks.
How do you protect against injection attacks in Heroku apps querying Salesforce data?
A) Use parameterized queries, validate input rigorously, and avoid string concatenation in queries
B) Accept raw input without validation
C) Use concatenated strings in SOQL queries
D) Ignore input sanitation
Answer: A
Explanation: Proper input handling prevents injection vulnerabilities.
What is the benefit of using mutual TLS (mTLS) between Heroku apps and Salesforce?
A) Both client and server authenticate each other, strengthening trust and preventing man-in-the-middle attacks
B) Only server authentication is performed
C) mTLS weakens security
D) mTLS disables encryption
Answer: A
Explanation: Mutual authentication improves connection security.
How can you detect anomalous behavior in Salesforce-Heroku integrations?
A) Use application monitoring tools combined with anomaly detection on API call patterns and error rates
B) Monitor only server uptime
C) Ignore behavioral anomalies
D) Only check logs monthly
Answer: A
Explanation: Anomaly detection helps detect attacks or failures early.
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