MCQs

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1. What is a frequent consequence of a failed load balancer in cloud environments?
   a. Even traffic distribution
   b. Server underutilization
   c. Server overload and possible downtime
   d. Reduced security
   Answer: c. Server overload and possible downtimetech-now+1
2. When a cloud load balancer fails, what is likely to happen to application response time?
   a. Decreases
   b. Remains unchanged
   c. Increases significantly
   d. Unaffected if DNS is healthy
   Answer: c. Increases significantlyalibabacloud+1
3. Which protocol misconfiguration is a common reason for failed load balancing?
   a. SMTP
   b. HTTP
   c. SSL/TLS
   d. DHCP
   Answer: c. SSL/TLSbugasura+1
4. On cloud platforms, what happens if health checks are misconfigured on the load balancer?
   a. Traffic always gets rerouted
   b. Healthy servers are marked unhealthy
   c. Traffic never gets routed
   d. Security settings erase
   Answer: b. Healthy servers are marked unhealthyoracle+1
5. Which scenario is most likely a symptom of load balancer failure?
   a. All backend servers display “Healthy”
   b. Uneven or no traffic to some servers
   c. Reduced storage usage
   d. Increased throughput
   Answer: b. Uneven or no traffic to some serverstech-now+1
6. What is a critical first step when troubleshooting a load balancer crash?
   a. Update software
   b. Rapid failure detection and alerting
   c. Add servers manually
   d. Ignore minor errors
   Answer: b. Rapid failure detection and alertingcyfuture+1
7. What kind of network configuration may directly cause a load balancer to fail?
   a. Inadequate routing rules
   b. Updated firmware
   c. Strong encryption
   d. High disk I/O
   Answer: a. Inadequate routing rulesalibabacloud+1
8. If backend servers are failing independently in a cloud architecture, what may be the root cause for “failed load balancing”?
   a. Load balancer is healthy, backend nodes have issues
   b. Optimized DNS
   c. Additional resource allocation
   d. Software updates
   Answer: a. Load balancer is healthy, backend nodes have issuesbugasura+1
9. How can expired SSL certificates impact cloud load balancing?
   a. They boost security
   b. Cause connection errors, reducing trust and usability
   c. Have no effect
   d. Increase load balancer speed
   Answer: b. Cause connection errors, reducing trust and usabilityoracle+1
10. What is a load balancer bottleneck?
    a. Backend storage limitation
    b. The load balancer is overwhelmed during traffic spikes
    c. DNS failure
    d. Encrypted traffic
    Answer: b. The load balancer is overwhelmed during traffic spikestech-now+1
11. Which cloud load balancer symptom signals a DNS configuration problem?
    a. Consistent backend traffic
    b. Applications become inaccessible
    c. Increased efficiency
    d. Higher resource utilization
    Answer: b. Applications become inaccessiblecloud.google+1
12. What is generally not a symptom of failed load balancing?
    a. Sudden latency spikes
    b. Uniform response times across all servers
    c. Traffic distribution errors
    d. Health check failures
    Answer: b. Uniform response times across all serversbugasura+1
13. What tool can help monitor and detect failed load balancing events in real-time?
    a. Word processor
    b. Cloud-native monitoring tools (e.g., AWS CloudWatch)
    c. Print server
    d. Calculator
    Answer: b. Cloud-native monitoring tools (e.g., AWS CloudWatch)cyfuture+1
14. Which is NOT a recommended step during immediate response to load balancer failure?
    a. Activate incident response team
    b. Assess outage scope
    c. Ignore traffic patterns
    d. Check recent changes
    Answer: c. Ignore traffic patternscyfuture+1
15. A failed health endpoint in a server group can cause which problem?
    a. Security breach
    b. Load balancer will not route traffic to the endpoint
    c. Increased replication speed
    d. Faster disk I/O
    Answer: b. Load balancer will not route traffic to the endpointoracle+1
16. What is the impact of network connectivity issues between the load balancer and backend servers?
    a. Faster traffic distribution
    b. Inability of load balancer to distribute requests to those servers
    c. Optimized TCP performance
    d. Enhanced security
    Answer: b. Inability of load balancer to distribute requests to those serversalibabacloud+1
17. Hardware malfunctions in a load balancer appliance will most likely result in:
    a. Improved throughput
    b. Delay in traffic distribution or loss of service
    c. Decreased server capacity
    d. Reduced application latency
    Answer: b. Delay in traffic distribution or loss of servicecyfuture+1
18. Improper firewall settings can cause load balancer:
    a. Not to block traffic
    b. To block legitimate requests leading to downtime
    c. To increase traffic flow
    d. To encrypt all packets
    Answer: b. To block legitimate requests leading to downtimeaws.amazon+1
19. What is a best practice to prevent failed load balancing due to sudden traffic spikes?
    a. Limit resources
    b. Enable auto-scaling for load balancers
    c. Disable health checks
    d. Increase DNS records
    Answer: b. Enable auto-scaling for load balancerstech-now+1
20. How can misconfigured DNS records cause load balancing failure?
    a. Blocking backend communication
    b. Improving latency
    c. Enhancing network congestion
    d. Upgrading certificates
    Answer: a. Blocking backend communicationcloud.google+1
21. Which log should be checked first when debugging load balancer failures?
    a. Authentication log
    b. Load balancer logs
    c. Application error log
    d. Database slow log
    Answer: b. Load balancer logsaws.amazon+1
22. If some users report access, but others cannot reach the cloud service, what failure is possible?
    a. Regional DNS or load balancer failure
    b. Backend storage is full
    c. High memory usage
    d. All servers are healthy
    Answer: a. Regional DNS or load balancer failurecloud.google+1
23. SSL/TLS misconfiguration during failed load balancing may cause which direct effect?
    a. All requests succeed
    b. Users experience secure connections
    c. Users receive connection errors
    d. Automated failover triggers immediately
    Answer: c. Users receive connection errorsbugasura+1
24. Which brief, transient cloud event is often mistaken for permanent load balancing failure?
    a. Latency spike due to autoscaling event
    b. Slow firmware update
    c. Certificate renewal
    d. Service restart
    Answer: a. Latency spike due to autoscaling eventtech-now+1
25. What primary cloud resource’s misallocation may simulate a load balancer failure?
    a. Network bandwidth
    b. Printer resources
    c. User quotas
    d. Mobile app usage
    Answer: a. Network bandwidthalibabacloud+1
26. When a load balancer is set with incorrect backend health check intervals, this can cause?
    a. Balanced request rates
    b. Flapping server status and traffic blackholing
    c. Enhanced redundancy
    d. Neutral response time
    Answer: b. Flapping server status and traffic blackholingoracle+1
27. Which is NOT a typical cause of failed load balancing in cloud applications?
    a. Health check misconfiguration
    b. Redundant network paths
    c. Traffic overload
    d. DNS misconfiguration
    Answer: b. Redundant network pathsbugasura+1
28. What cloud-native strategy is foundational for surviving load balancer failure?
    a. Single instance deployment
    b. Multi-regional redundancy
    c. Static resource allocation
    d. Direct client-server links
    Answer: b. Multi-regional redundancytech-now+1
29. Why may round-robin algorithms sometimes fail under heavy load?
    a. They ignore server capacity or health under peak loads
    b. They reallocate resources efficiently
    c. They prioritize healthy servers
    d. They always check backend health
    Answer: a. They ignore server capacity or health under peak loadsalibabacloud+1
30. Traffic distribution errors are often caused by:
    a. High CPU on servers
    b. Inefficient load balancing algorithm
    c. Fast SSDs
    d. Frequent patching
    Answer: b. Inefficient load balancing algorithmoracle+1
31. Unavailable backend servers due to failed load balancing result in:
    a. Increased uptime
    b. Downtime or denied user access
    c. Reduced errors
    d. Accelerated data retrieval
    Answer: b. Downtime or denied user accesscloud.google+1
32. Which step is best to isolate load balancer failure causes?
    a. Rebooting the database
    b. Reviewing load balancer logs, configurations, and metrics
    c. Increasing DNS TTL
    d. Deploying more storage
    Answer: b. Reviewing load balancer logs, configurations, and metricsaws.amazon+1
33. If a cloud provider’s load balancer goes down globally, what happens?
    a. Regional failover, if configured; otherwise, global downtime
    b. Faster migration
    c. Instant security hardening
    d. Increased backup speed
    Answer: a. Regional failover, if configured; otherwise, global downtimebugasura+1
34. Load balancer plugin or API misconfigurations in multi-cloud deployments may result in:
    a. Improved operability
    b. Data synchronization or traffic distribution failures
    c. Auto-scaling
    d. Lower latency
    Answer: b. Data synchronization or traffic distribution failuresplacementpreparation+1
35. What purpose do cloud health checks serve in preventing load balancer failure?
    a. Send traffic to all servers equally
    b. Remove unhealthy servers from active traffic pools
    c. Encrypt data only
    d. Lower server load
    Answer: b. Remove unhealthy servers from active traffic poolsoracle+1
36. Misconfigured firewall policies on the load balancer itself can:
    a. Allow all traffic by default
    b. Block legitimate traffic, causing interruptions
    c. Speed up traffic routing
    d. Upgrade firmware automatically
    Answer: b. Block legitimate traffic, causing interruptionsaws.amazon+1
37. Which monitoring metric is least relevant when checking for failed load balancing?
    a. Throughput
    b. Response time
    c. CPU temperature on one server
    d. Connection errors
    Answer: c. CPU temperature on one serveralibabacloud+1
38. After a failed load balancer restarts, what must be confirmed for proper recovery?
    a. Database backup
    b. All backend servers are healthy and registered
    c. SSL certificates renew automatically
    d. Serverless functions redeploy
    Answer: b. All backend servers are healthy and registeredtech-now+1
39. What redundant architecture prevents total outage on load balancer failure?
    a. Single instance deployment
    b. Active-active/active-passive failover clusters
    c. DNS with long TTL
    d. Storage mirroring
    Answer: b. Active-active/active-passive failover clustersgeeksforgeeks+1
40. Why can DNS failover sometimes NOT resolve a load balancer crash promptly?
    a. DNS propagation delay
    b. Automated health checks
    c. Low request rates
    d. Synchronous backups
    Answer: a. DNS propagation delaycloud.google+1
41. When troubleshooting failed traffic routing, why check backend server health?
    a. To optimize CDN
    b. Load balancer may distribute to failing/unregistered nodes
    c. For routine maintenance
    d. For increasing capacity
    Answer: b. Load balancer may distribute to failing/unregistered nodesbugasura+1
42. Which event is NOT a likely result of failed cloud load balancing?
    a. Service downtime for some users
    b. Consistent geographic latency reduction
    c. Overloaded remaining servers
    d. Performance bottlenecks
    Answer: b. Consistent geographic latency reductiontech-now+1
43. What action is vital after identifying a failed load balancer node in a cluster?
    a. Ignore it if intermittent
    b. Isolate and replace the node
    c. Reboot all backend servers
    d. Change all SSL certificates
    Answer: b. Isolate and replace the nodealibabacloud+1
44. Cloud load balancer misrouting may result in:
    a. Random server selection regardless of health
    b. Faster content delivery
    c. Improved resource reservation
    d. Higher security rating
    Answer: a. Random server selection regardless of healthbugasura+1
45. Service unavailability after a cloud infrastructure change suggests:
    a. Proper failover configuration
    b. Potential load balancer/DNS misconfiguration
    c. Robust health checks
    d. Instant scaling success
    Answer: b. Potential load balancer/DNS misconfigurationcloud.google+1
46. Cloud-native load balancing is especially vulnerable during:
    a. Planned maintenance with no failover
    b. Instantaneous request distributions
    c. Synchronous storage migration
    d. Idle periods
    Answer: a. Planned maintenance with no failovercyfuture+1
47. What is one effect of accidentally removing all backend servers from a load balancer?
    a. High availability
    b. All traffic drops with 5xx errors
    c. Enhanced distribution
    d. Improved boot times
    Answer: b. All traffic drops with 5xx errorsoracle+1
48. A proxying error by a load balancer during SSL passthrough often causes:
    a. All connections succeed
    b. Handshake failures and dropped requests
    c. Enhanced request persistence
    d. Faster cache cycles
    Answer: b. Handshake failures and dropped requeststech-now+1
49. Which ONE change always improves resilience to load balancer failure?
    a. Remove redundant paths
    b. Enable multi-zone or multi-region deployment
    c. Lower resource allocation
    d. Increase TTL on DNS records
    Answer: b. Enable multi-zone or multi-region deploymentbugasura+1
50. A typical log clue for failed load balancing is:
    a. Frequent 5xx errors in load balancer logs
    b. Successful upstream handshakes
    c. All health checks passing at all times
    d. High throughput with no delay
    Answer: a. Frequent 5xx errors in load balancer logsaws.amazon+1

1. https://tech-now.io/en/it-support-issues/cloud-server/how-to-fix-a-load-balancer-failure-step-by-step-guide-to-restoring-traffic-distribution
2. https://bugasura.io/blog/cloud-app-testing/
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7. https://cloud.google.com/load-balancing/docs/https/troubleshooting-ext-https-lbs
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10. https://www.sanfoundry.com/cloud-computing-mcqs/
11. https://www.scribd.com/document/663279534/Elastic-Load-Balancer-MCQS
12. https://testbook.com/objective-questions/mcq-on-cloud-technology–5eea6a0d39140f30f369e30f
13. https://interviewkickstart.com/blogs/interview-questions/cloud-computing-mcqs-it-professionals
14. https://www.utu.ac.in/DiwalibaPolytechnic/download/Objective%20Type%20Questions/CE-IT/Cloud%20Infrastructure.pdf
15. https://www.sanfoundry.com/1000-cloud-computing-questions-answers/
16. https://docs.oracle.com/en-us/iaas/Content/Balance/Reference/troubleshooting_load_balancer.htm
17. https://examradar.com/fundamentals-of-cloud-computing-and-cloud-services-mcqs/
18. https://docs.rackspace.com/docs/cloud-load-balancer-troubleshooting
19. https://www.readmcqs.com/cloud-computing-mcq/
20. https://www.scribd.com/document/714050526/Cloud-Computing-Mcqs