Explanation:

Why B is Correct?

SMTP connection failures are most commonly caused by:

Incorrect server details (e.g., wrong hostname, port, or authentication credentials).

Network issues (e.g., firewall blocking port 25/587, DNS resolution failures).

Tableau’s Email Configuration Guide lists this as the first troubleshooting step.

Why Other Options Are Incorrect?

A.Installing an email client: Tableau Server communicates directly with SMTP servers—no local client is needed.

C.Increasing RAM: Unrelated to SMTP connectivity issues.

D.Changing email format: Affects message content, not delivery failures.

Reference:

Tableau’s SMTP Troubleshooting Guide.

Final Note:

Start with B—90% of SMTP issues stem from misconfiguration or network blocks. If unresolved, check firewall rules or SMTP server logs.

Explanation:

Why B is Correct?

A comprehensive load test must mimic real-world usage patterns, including:

Viewing dashboards (VizQL processes).

Publishing workbooks (Backgrounder/Repository).

Refreshing extracts (Backgrounder/Data Engine).

This reveals bottlenecks across all server components, not just one area.

Tableau’s Load Testing Guide emphasizes diverse user simulations.

Why Other Options Are Incomplete?

A. Single dashboard test: Only stresses VizQL, ignoring other services (e.g., Backgrounder).

C. Data source speeds alone: Measures external systems, not Tableau Server’s capacity.

D. Admin-only tests: Privileged tasks (e.g., user management) don’t reflect typical user load.

Key Elements of a Robust Load Test:

User concurrency: Ramp up from 100 to 1,000+ users.

Activity mix:

70% dashboard views, 20% extracts, 10% publishes.

Monitor metrics: CPU, memory, query latency, and error rates.

Reference:

NIST SP 800-146: Recommends simulating realistic workloads for accurate testing.

Final Note:

B is the only holistic approach. Options A/C/D test narrow scenarios, risking overlooked failures. Always model real user behavior.

Explanation:

Why B is Correct?

Intermittent performance issues during peak times typically stem from resource bottlenecks (e.g., high concurrent users, inefficient queries, or large extracts).

Usage analysis helps pinpoint:

Peak traffic times (e.g., 9 AM–11 AM).

Resource-heavy dashboards (via Tableau Cloud’s Admin Insights or Usage Metrics).

Query latency from underlying data sources.

Tableau’s Performance Troubleshooting Guide recommends this as the first step.

Why Other Options Are Premature?

A. Adding instances blindly: Overprovisioning is costly and unnecessary if the issue is a single inefficient dashboard.

C. Upgrading internet: Rarely the cause—Tableau Cloud runs on AWS/Azure, and client-side internet speed affects only individual users.

D. Reducing dashboards: A last resort—optimization should come before removal.

Steps to Diagnose Performance Issues:

Review Admin Insights in Tableau Cloud:

Check "Content Performance" and "User Activity" tabs.

Identify slow dashboards:

Look for high-load workbooks (e.g., complex calculations, large extracts).

Optimize or schedule refreshes during off-peak hours.

Reference:

Tableau’s Admin Insights Documentation.

Final Note:

Start with B—data-driven decisions beat guesswork (A/C/D). If analysis reveals infrastructure limits, then consider scaling (A)

Explanation:

Why B is Correct?

At-rest encryption ensures that data extracts (.tde or .hyper files) stored on Tableau Server’s disk are unreadable without a decryption key, protecting against unauthorized access (e.g., theft, breaches).

Tableau’s Extract Encryption Guide mandates this for compliance (e.g., HIPAA, GDPR).

Why Other Options Are Incorrect?

A. VPN for transfers: Secures data in transit, not at rest (extracts are already encrypted during transfer via HTTPS).

C. Intrusion detection: Useful for monitoring but doesn’t directly encrypt extracts.

D. Increasing storage: Irrelevant—encryption adds minimal overhead (~5-10% space).

Key Steps for Secure Extract Encryption:

Generate a strong encryption key (e.g., 256-bit AES).

Reference:

Tableau’s Security Hardening Guide prioritizes at-rest encryption.

Final Note:

B is the only direct solution for securing extracts at rest. Options A/C/D address peripheral concerns but not core encryption. Always back up the encryption key separately!

Explanation:

Why B is Correct?

Dependency resolution errors occur when Tableau Server’s prerequisites (e.g., libraries like libssl, libpq) are missing or outdated.

The first step is to check Tableau’s Linux Installation Requirements and ensure all dependencies are met.

Commands like ldd (to check missing libraries) or apt/yum (to install packages) resolve most issues.
Why Other Options Are Incorrect?

A. Disabling firewall/antivirus: Rarely affects dependency installation—focus on package management first.

C. Unrestricted internet access: Only needed if dependencies are fetched from online repos (but check local packages first).

D. Changing hostname: Irrelevant to dependency errors (hostname matters for clustering, not installation).

Reference:

Tableau’s Linux Dependency Guide.

Final Note:

Always start with B—dependency issues are common and fixable. Options A/C/D are tangential unless B fails.