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What is horizontal scaling in cloud computing?
a. Adding more CPU to a single server
b. Adding more servers to distribute the load
c. Reducing the number of servers
d. Upgrading storage only
Answer: b. Adding more servers to distribute the loadcloudzero+1
What is another term commonly used for horizontal scaling?
a. Scaling up
b. Scaling out
c. Scaling down
d. Scaling in
Answer: b. Scaling outsaisatwik+1
Which scaling method is most ideal for distributed cloud applications?
a. Vertical scaling
b. Diagonal scaling
c. Horizontal scaling
d. Linear scaling
Answer: c. Horizontal scalingscribd+1
What hardware component is crucial for horizontal scaling?
a. Monolithic server
b. Load balancer
c. GPU
d. Network switch only
Answer: b. Load balancervirtana+1
Which feature does horizontal scaling enhance the most?
a. Power consumption
b. CPU temperature
c. Availability and redundancy
d. Fan speed
Answer: c. Availability and redundancyvirtana+1
Which cloud providers implement auto-scaling horizontally?
a. Facebook only
b. AWS, Azure, Google Cloud
c. Only private clouds
d. Mainframes
Answer: b. AWS, Azure, Google Cloudcloud.google+1
In horizontal scaling, what happens when demand decreases?
a. Servers are shut down or removed
b. Servers are upgraded
c. Storage is reduced
d. CPU frequency is decreased
Answer: a. Servers are shut down or removedspot+1
What determines the upper scalability limit of horizontal scaling?
a. CPU speed of a single machine
b. Number of nodes that can be managed efficiently
c. Disk size
d. Operating system version
Answer: b. Number of nodes that can be managed efficientlysaisatwik+1
What is the main architectural model for horizontal scaling?
a. Monolithic
b. Distributed
c. Ring
d. Star
Answer: b. Distributedcloudzero+1
Which scenario benefits the most from horizontal scaling?
a. Predictable workload
b. Sudden surges in traffic
c. Single-user applications
d. Static websites
Answer: b. Sudden surges in trafficturbo360+1
What is a key disadvantage of horizontal scaling?
a. Limited scalability
b. Greater architectural complexity
c. Easier maintenance
d. Better performance
Answer: b. Greater architectural complexityspot+1
What is required to distribute traffic among horizontally scaled servers?
a. Static IP addresses
b. Load balancer software/appliance
c. SSD storage
d. RAID arrays
Answer: b. Load balancer software/applianceturbo360+1
Which of these is more cost-effective at large scale?
a. Vertical scaling
b. Horizontal scaling
c. Linear scaling
d. Diagonal scaling
Answer: b. Horizontal scalingmega+1
How does horizontal scaling affect fault tolerance?
a. Decreases fault tolerance
b. No effect
c. Increases fault tolerance due to redundancy
d. Depends on storage type
Answer: c. Increases fault tolerance due to redundancycloudzero+1
Which is NOT an advantage of horizontal scaling?
a. Improved availability
b. Unlimited scalability in theory
c. Single point of failure
d. High fault tolerance
Answer: c. Single point of failurevirtana+1
What can be used to automate horizontal scaling in the cloud?
a. Manual addition of servers
b. Auto-scaling policies and scripts
c. Changing BIOS settings
d. Increasing RAM only
Answer: b. Auto-scaling policies and scriptsmultishoring+1
Which layer often implements horizontal scaling in cloud architecture?
a. Presentation tier
b. Logic tier
c. Data tier
d. All of the above
Answer: d. All of the abovesaisatwik+1
Horizontal scaling is also known as:
a. Scaling down
b. Scaling in
c. Scaling out
d. Scaling up
Answer: c. Scaling outdigitalocean+1
Which technology allows dynamic allocation of computing nodes for scaling?
a. Mainframe computing
b. Virtualization
c. Tape drives
d. Static partitioning
Answer: b. Virtualizationmultishoring+1
What is required for effective horizontal scaling of stateful applications?
a. Shared disk only
b. No load balancing needed
c. Session state management/distribution
d. Redundant CPUs
Answer: c. Session state management/distributionvirtana+1
A cloud database experiencing massive read/write operations would optimally use:
a. Horizontal scaling
b. Vertical scaling
c. Physical partitioning
d. Linear scaling
Answer: a. Horizontal scalingplacementpreparation+1
Which major characteristic differentiates horizontal from vertical scaling?
a. Changes the same machine
b. Adds/removes entire servers or nodes
c. Reduces server cost only
d. Upgrades only RAM
Answer: b. Adds/removes entire servers or nodesdigitalocean+1
Which option best fits elastic scaling in cloud environments?
a. Only vertical scaling
b. Hybrid scaling
c. Horizontal scaling
d. None of the above
Answer: c. Horizontal scalinginterviewquizz+1
How does horizontal scaling help in application downtime?
a. Increases downtime
b. No change in downtime
c. Decreases downtime due to gradual, additive upgrades
d. Downtime is unavoidable
Answer: c. Decreases downtime due to gradual, additive upgradescloudzero+1
Which application is best suited for horizontal scaling?
a. Monolithic enterprise apps
b. Microservices architecture
c. Legacy COBOL systems
d. Spreadsheet apps
Answer: b. Microservices architecturesaisatwik+1
Which type of scaling is required for geographic distribution of services?
a. Vertical scaling
b. Horizontal scaling
c. Diagonal scaling
d. Serial scaling
Answer: b. Horizontal scalingmultishoring+1
Which metric improves with horizontal scaling?
a. Disk I/O only
b. Network throughput per instance
c. System throughput and capacity
d. Both a and c
Answer: c. System throughput and capacitycloudzero+1
When to prefer horizontal scaling over vertical scaling?
a. When increased RAM is the only requirement
b. When workload can be distributed across servers
c. For single-threaded apps only
d. Always
Answer: b. When workload can be distributed across serversvirtana+1
What is the main limiting factor for horizontal scaling?
a. CPU cores
b. Software architecture and dependencies
c. Hard disk capacity
d. ISP bandwidth
Answer: b. Software architecture and dependenciesturbo360+1
What happens if one node fails in a horizontally scaled system?
a. Entire service crashes
b. Data is lost
c. Other nodes take over due to redundancy
d. CPU overheating
Answer: c. Other nodes take over due to redundancysaisatwik+1
What cloud model most frequently uses horizontal scaling?
a. SaaS only
b. IaaS and PaaS
c. DaaS
d. BPaaS
Answer: b. IaaS and PaaSmultishoring+1
What scaling model uses commodity hardware for cost-effectiveness?
a. Vertical scaling
b. Horizontal scaling
c. Scaling in
d. Upgrading
Answer: b. Horizontal scalingcloudzero+1
Which database technology is known for horizontal scaling?
a. MySQL single-server
b. Cassandra
c. Access
d. Filemaker Pro
Answer: b. Cassandrasaisatwik+1
What is an essential design principle for applications to exploit horizontal scaling?
a. Monolithic codebase
b. Statelessness or distributed state handling
c. Local file persistence
d. No code changes
Answer: b. Statelessness or distributed state handlingcloudzero+1
How does horizontal scaling relate to cloud elasticity?
a. Enables elasticity by allowing quick expansion/contraction
b. Reduces elasticity options
c. No relationship
d. Only applies to storage
Answer: a. Enables elasticity by allowing quick expansion/contractioninterviewquizz+1
Which AWS feature directly supports horizontal scaling?
a. EC2 Vertical Upgrade
b. Auto Scaling Groups
c. Lambda Warm Starts
d. Glacier Storage
Answer: b. Auto Scaling Groupscloud.google+1
Which is NOT typically required when adding nodes in horizontal scaling?
a. Application code refactoring
b. Manual load balancing
c. Fault-tolerant design considerations
d. Local database-only access
Answer: d. Local database-only accesssaisatwik+1
Which application is most difficult to scale horizontally?
a. Stateless REST APIs
b. Sessionless web apps
c. Legacy monolithic apps with strong interdependencies
d. Microservices
Answer: c. Legacy monolithic apps with strong interdependenciesturbo360+1
What benefit does horizontal scaling provide in global cloud data centers?
a. Centralized points of failure
b. Reduced geographic redundancy
c. Lower network latency for distant users
d. Inflexible scaling process
Answer: c. Lower network latency for distant usersmultishoring+1
What is a risk of poor horizontal scaling implementation?
a. Slow server reboots
b. Overloaded or underused nodes due to lack of proper load balancing
c. Cheapest server cost
d. Disk fragmentation
Answer: b. Overloaded or underused nodes due to lack of proper load balancingspot+1
In which direction does horizontal scaling increase capacity?
a. Resource-rich servers
b. Multiple servers adding width to resource pool
c. Upgrading individual CPUs
d. Increasing only storage devices
Answer: b. Multiple servers adding width to resource pooldigitalocean+1
Who is responsible for managing additional nodes in a horizontally scaled cloud solution?
a. Physical security team
b. Application orchestration layer or cloud management system
c. Office users
d. Remote control systems only
Answer: b. Application orchestration layer or cloud management systemcloud.google+1
What is the initial cost implication of horizontal scaling?
a. Very low
b. Higher due to purchase of new servers
c. No impact
d. Cheaper than vertical scaling for one server
Answer: b. Higher due to purchase of new serversspot+1
In the public cloud, how is billing handled for horizontal scaling resources?
a. Annual commitment only
b. Pay-as-you-go for active nodes
c. No billing changes
d. Quarterly payments only
Answer: b. Pay-as-you-go for active nodesturbo360+1
When removing nodes during a scale-in event, what must happen to application data?
a. It is deleted
b. It is migrated, replicated, or redistributed to remaining nodes
c. No action needed
d. Backed up to tape
Answer: b. It is migrated, replicated, or redistributed to remaining nodesvirtana+1
What is the benefit of using commodity hardware in horizontal scaling?
a. Lower cost and easier replacement
b. Increases complexity excessively
c. Requires specialist engineers
d. Slower performance
Answer: a. Lower cost and easier replacementcloudzero+1
Which type of scaling may require downtime for server upgrades?
a. Horizontal scaling
b. Vertical scaling
c. Elastic scaling
d. Cloud bursting
Answer: b. Vertical scalingspot+1
Which metric drops if horizontal scaling is not done efficiently?
a. Availability and performance
b. Fan speed
c. Power supply efficiency
d. Number of users
Answer: a. Availability and performancespot+1
How does horizontal scaling contribute to high availability?
a. By centralizing all workloads
b. By distributing workload across multiple, independent nodes with redundancy
c. By having a single powerful server
d. Ignoring failure scenarios
Answer: b. By distributing workload across multiple, independent nodes with redundancysaisatwik+1
What is the impact of horizontal scaling on cloud disaster recovery?
a. Increases risk as more nodes may fail simultaneously
b. Improves resilience due to multiple nodes in multiple locations
c. Slows down recovery time
d. None
Answer: b. Improves resilience due to multiple nodes in multiple locationsmultishoring+1

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