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What does N-1 policy in cloud computing refer to?
a. Running one less component than needed
b. Having one spare component for redundancy
c. Using no redundancy in the system
d. Reserving two spares for every component
Answer: b. Having one spare component for redundancyphoenixnap+2
The primary goal of N-1 redundancy is to:
a. Minimize costs without sacrificing uptime
b. Completely eliminate hardware usage
c. Double all system components
d. Reduce storage requirements
Answer: a. Minimize costs without sacrificing uptimemeter+1
Which cloud resource is commonly protected using an N-1 policy?
a. User authentication systems
b. Storage and compute nodes
c. DNS entries only
d. Application source code
Answer: b. Storage and compute nodesphoenixnap+1
In N-1 redundancy, “N” refers to:
a. Any arbitrary value
b. Number of active components required for full service
c. Always one
d. Total physical servers minus failed units
Answer: b. Number of active components required for full servicemeter+1
The “-1” in N-1 redundancy stands for:
a. Number of users minus one
b. Reduction in performance after failure
c. Allowing for the failure of any one component
d. The number of backup sites
Answer: c. Allowing for the failure of any one componentbmc+1
Which system would benefit most from N-1 policy?
a. Stateless servers supporting a web application
b. Standalone developer workstations
c. Compact flash storage on a single device
d. Local desktops isolated from a network
Answer: a. Stateless servers supporting a web applicationphoenixnap+1
What is a typical advantage of N-1 over 2N redundancy?
a. Higher total system cost
b. Increased hardware requirements
c. Lower cost with high availability
d. No failover capabilities
Answer: c. Lower cost with high availabilitybmc+1
N-1 redundancy is particularly important in cloud environments because of:
a. High cost of data center real estate
b. Security threats only
c. Unpredictable failure events
d. Frequent software upgrades
Answer: c. Unpredictable failure eventsmeter+2
Which is NOT true about N-1 redundancy?
a. It guarantees zero downtime always
b. It provides fault tolerance for single failures
c. It is less expensive than full duplication
d. It allows maintenance without service interruption
Answer: a. It guarantees zero downtime alwaysbmc+1
In a setup with 4 power supplies required for operation, an N-1 design would provision:
a. 3 power supplies total
b. 4 power supplies total
c. 5 power supplies total
d. 8 power supplies total
Answer: c. 5 power supplies totalphoenixnap+1
N-1 redundancy is also commonly referred to as:
a. Over-provisioning
b. Hot swapping
c. Minimal redundancy
d. Spare-based redundancy
Answer: d. Spare-based redundancymeter+1
A main risk of only using N-1 redundancy is:
a. Double hardware usage
b. Vulnerability to multiple simultaneous failures
c. Increased operational complexity
d. Lowered performance during peak
Answer: b. Vulnerability to multiple simultaneous failuresphoenixnap+1
The N-1 model is popular for which cloud infrastructure layer?
a. Application only
b. Hardware and networking
c. Management console interfaces
d. API endpoint tracking
Answer: b. Hardware and networkinglearn.microsoft+2
The N-1 policy helps meet which kind of data center uptime targets?
a. Only Tier I
b. Tier II and Tier III
c. Tier IV only
d. Consumer desktops
Answer: b. Tier II and Tier IIImeter+1
With N-1 redundancy, maintenance can be performed:
a. Only during full outages
b. While all systems stay operational
c. Only after service downtime
d. With no failover
Answer: b. While all systems stay operationalphoenixnap+1
An example of N-1 redundancy in cloud storage is:
a. A single disk in a standalone server
b. RAID 5 with one parity disk
c. Tape backup only, no online redundancy
d. Unlimited replicas of each file
Answer: b. RAID 5 with one parity diskbmc+1
N-1 redundancy provides protection against:
a. Any two components failing simultaneously
b. Loss of single components at a time
c. All hardware and software outages
d. Software version mismatches
Answer: b. Loss of single components at a timemeter+1
In N-1 networking design, what element is often redundant?
a. Web browsers
b. Network switches and routers
c. Smartphone apps
d. Source code repositories
Answer: b. Network switches and routersphoenixnap+1
Compared to N only, N-1 redundancy is:
a. Less reliable
b. Equally reliable
c. Significantly more reliable
d. Less fault tolerant
Answer: c. Significantly more reliablebmc+1
A cloud setup requiring 6 servers for function would provision how many in N-1?
a. 3
b. 6
c. 7
d. 12
Answer: c. 7meter+1
The N-1 principle allows cloud providers to:
a. Reduce capital expenses without increasing risk excessively
b. Remove all redundancy requirements
c. Add downtime during maintenance
d. Eliminate failover planning
Answer: a. Reduce capital expenses without increasing risk excessivelybmc+1
N-1 redundancy helps organizations avoid which issue?
a. Hardware overstock
b. Service outages due to single points of failure
c. Software compatibility issues
d. Supply chain complexity
Answer: b. Service outages due to single points of failurephoenixnap+1
Under N-1, if one backup component fails during maintenance, the system:
a. Remains fully operational
b. Shuts down immediately
c. Operates at half capacity
d. Loses complete functionality
Answer: a. Remains fully operationalmeter+1
N-1 redundancy is the industry standard for:
a. Consumer hardware
b. Professional data centers
c. Mobile devices
d. High-performance desktops
Answer: b. Professional data centerscoresite+2
What is NOT a primary reason organizations choose N-1 for cloud?
a. Lower cost than 2N or 2N+1
b. Meets regulatory minimal availability
c. Maximizes performance at any cost
d. Practical balance of uptime vs. expense
Answer: c. Maximizes performance at any costbmc+1
How does N-1 policy relate to scalability in the cloud?
a. N-1 prevents any scale-up
b. N-1 models can easily scale by adding further redundancy
c. N-1 only works for small environments
d. N-1 requires all scaling to be manual
Answer: b. N-1 models can easily scale by adding further redundancyphoenixnap+1
What problem can arise if N-1 is not properly monitored?
a. No effect on operations
b. Unnoticed backup failure risking downtime
c. Improved service speed
d. Lowered cloud costs
Answer: b. Unnoticed backup failure risking downtimemeter+1
N-1 redundancy is adopted mainly for:
a. Load balancing
b. Predictable failure management
c. Increasing network bandwidth
d. Complex application design
Answer: b. Predictable failure managementphoenixnap+1
In the event of simultaneous dual failures, N-1 redundancy will:
a. Maintain all services
b. Allow some downtime
c. Eliminate all risks
d. Automatically duplicate all servers
Answer: b. Allow some downtimebmc+1
To further increase reliability over N-1, a cloud provider can implement:
a. N only
b. 2N or N+2 models
c. No redundancy
d. Shared hosting only
Answer: b. 2N or N+2 modelscoresite+1
N-1 redundancy is suitable for organizations seeking:
a. Extreme cost cutting with high risk
b. Balanced approach to uptime and spending
c. Unlimited uptime only
d. Minimal compliance only
Answer: b. Balanced approach to uptime and spendingbmc+1
N-1 redundancy is less suitable for:
a. Tier IV data centers
b. Mid-tier and small enterprise facilities
c. Cloud environments prioritizing cost control
d. On-premise server rooms
Answer: a. Tier IV data centersmeter+1
What cost benefit is associated with N-1?
a. Highest upfront cost
b. Reduced capital expenses compared to full duplication
c. No savings at all
d. Reduces only operational costs, not capital
Answer: b. Reduced capital expenses compared to full duplicationbmc+1
Standard N-1 implementation in cloud assumes failure is:
a. Temporary and rare
b. Unavoidable at some point
c. Only caused by software bugs
d. Intentionally induced
Answer: b. Unavoidable at some pointmeter+1
What key metric does N-1 support in service level agreements?
a. Response time
b. Power usage effectiveness
c. Uptime percentage
d. Number of supported users
Answer: c. Uptime percentagephoenixnap+1
What typically triggers a switch to the spare in N-1 design?
a. Increased network load
b. Failure of any single component
c. Expansion of customer base
d. Scheduled decommission of system
Answer: b. Failure of any single componentphoenixnap+1
What is required after the standby (spare) is used in an N-1 architecture?
a. Permanent run with fewer components
b. Immediate replacement or repair of failed unit
c. Total outage of system
d. Conversion to no redundancy
Answer: b. Immediate replacement or repair of failed unitmeter+1
The efficiency of N-1 model in cloud is best described as:
a. Resource heavy, inefficient
b. Highly efficient for cost vs. uptime tradeoff
c. Not cost-effective
d. Poor performance during failover
Answer: b. Highly efficient for cost vs. uptime tradeoffbmc+1
N-1 redundancy for cloud network architectures typically involves:
a. Extra network interfaces only
b. Redundant switches, firewalls, and uplinks
c. Additional IP address blocks
d. Extra mobile data plans
Answer: b. Redundant switches, firewalls, and uplinksphoenixnap+1
In power distribution, N-1 redundancy protects against failures by including:
a. Two backup units for every active
b. Single backup per group of “N” required units
c. No backup at all
d. Shared backup with another facility
Answer: b. Single backup per group of “N” required unitsmeter+1
The N-1 model is also useful in cloud application deployment by:
a. Permitting blue/green deploys with rollback
b. Restricting number of users per application
c. Limiting deployment environments
d. Disallowing disaster recovery
Answer: a. Permitting blue/green deploys with rollbacklearn.microsoft+1
Among the following, which best practices align with N-1 usage?
a. Single-threaded routine deployments
b. Continuous monitoring and health checks
c. Static resource assignment
d. No failover planning
Answer: b. Continuous monitoring and health checkslearn.microsoft+1
What aspect of cloud computing drives adoption of N-1 policy?
a. Elastic scaling of resources
b. Fixed resources per user
c. Strict on-premise management
d. Manual failover switching
Answer: a. Elastic scaling of resourceswikipedia+2
N-1 can help cloud environments comply with which requirements?
a. Physical access logging only
b. Uptime SLAs and regulatory mandates
c. Custom hardware decoding
d. Proprietary application frameworks
Answer: b. Uptime SLAs and regulatory mandatesphoenixnap+1
A key disadvantage of N-1 policy is:
a. Wastefully high operating cost
b. No benefit in power savings
c. Possible vulnerability if multiple failures occur
d. Mandatory use in all systems
Answer: c. Possible vulnerability if multiple failures occurmeter+1
To mitigate risks in N-1, cloud architects should:
a. Disable health monitoring
b. Incorporate rapid failure detection and response
c. Increase manual maintenance
d. Reduce redundancy further
Answer: b. Incorporate rapid failure detection and responselearn.microsoft+1
Which use case would NOT justify N-1 redundancy?
a. Mission-critical medical systems requiring ultra-high uptime
b. Enterprise file storage
c. Web application clusters
d. Email server farm
Answer: a. Mission-critical medical systems requiring ultra-high uptimebmc+1
If a system operating under N-1 configuration fails and the redundancy is not replenished, the next failure will cause:
a. Full failover to new redundancy
b. Immediate service outage
c. Increased redundancy automatically
d. Unaffected operations
Answer: b. Immediate service outagebmc+1
Which cloud provider feature aligns with the N-1 policy for virtual machines?
a. Spot instance pricing
b. Auto-scaling groups with healthy capacity plus spare
c. Single-tenant bare metal only
d. Free-tier offerings
Answer: b. Auto-scaling groups with healthy capacity plus sparelearn.microsoft+1
The N-1 policy is best summarized as:
a. Maximum redundancy possible, regardless of efficiency
b. Zero redundancy with total cost minimization
c. Efficient redundancy model for balancing uptime and cost
d. Exclusive to private on-premises environments
Answer: c. Efficient redundancy model for balancing uptime and costbmc+2

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