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What is the main purpose of a redundant power supply in cloud computing servers?
a. To increase processing speed
b. To ensure continuous operation during power failure
c. To reduce energy consumption
d. To enable virtualization
Answer: b. To ensure continuous operation during power failureracksolutions+2
Which of the following scenarios best uses a redundant power supply?
a. Personal desktop computers
b. High-availability data centers
c. Small home routers
d. Standalone inkjet printers
Answer: b. High-availability data centerscontabo+2
In a dual-redundant power supply system, if one unit fails, what happens?
a. The server shuts down
b. The other power supply continues to run the server
c. Data is lost
d. Server performance is degraded
Answer: b. The other power supply continues to run the serverracksolutions+1
How is redundancy typically achieved for power in a cloud data center?
a. Using multiple independent power sources
b. Using a single large battery
c. Relying only on the public grid
d. Through software optimization
Answer: a. Using multiple independent power sourcesinterviewquizz+2
What does “hot swapping” a power supply mean?
a. Removing a working unit for maintenance
b. Replacing a failed unit without shutting down the device
c. Increasing output voltage
d. Upgrading server memory
Answer: b. Replacing a failed unit without shutting down the devicecontabo+1
Which component often distributes power to redundant server racks?
a. DHCP server
b. Power Distribution Unit (PDU)
c. DNS resolver
d. Firewall
Answer: b. Power Distribution Unit (PDU)synaccess+1
What is the N+1 redundancy model?
a. No redundancy
b. One backup for every required component
c. A single power source
d. Two times backup
Answer: b. One backup for every required componentliquidweb+1
What is the advantage of using separate power circuits for redundant supplies?
a. Saves physical space
b. Ensures uptime if one circuit fails
c. Reduces cabling cost
d. Increases cooling efficiency
Answer: b. Ensures uptime if one circuit failssynaccess+2
Which power redundancy method provides a mirror image of the minimum power needed?
a. N redundancy
b. N+1 redundancy
c. 2N redundancy
d. 3N/2 redundancy
Answer: c. 2N redundancysocomec+1
Which of the following is NOT typically part of a power redundant server rack?
a. Multiple independent power sources
b. Redundant internal power supplies
c. Multiple PDUs
d. Single-phase monitor
Answer: d. Single-phase monitorcontabo+1
What does 2N+1 redundancy offer?
a. Only twice the minimum power
b. Twice the minimum plus an extra backup
c. 50% of the minimum power
d. Only generator-based power
Answer: b. Twice the minimum plus an extra backupliquidweb+1
What is a common consequence if both redundant power supplies fail simultaneously?
a. The server switches automatically to solar power
b. The server shuts down
c. User data remains accessible
d. The CPU performance increases
Answer: b. The server shuts downracksolutions+1
Which type of facility most benefits from redundant power supplies?
a. Personal gaming rooms
b. Data centers
c. Internet cafes
d. School labs
Answer: b. Data centersliquidweb+2
What should each redundant power supply ideally connect to?
a. The same PDU
b. Different power chains/circuits
c. Only to UPS
d. Solar panel
Answer: b. Different power chains/circuitssynaccess+1
What is the primary goal of redundant power in cloud computing?
a. Lower energy bills
b. Maintenance convenience
c. Maximize uptime and availability
d. Increase storage capacity
Answer: c. Maximize uptime and availabilityinterviewquizz+2
If the utility power grid fails, which system usually takes over first?
a. Redundant power supply unit
b. Backup generator
c. UPS (Uninterruptible Power Supply)
d. Solar panels
Answer: c. UPS (Uninterruptible Power Supply)contabo+1
Which of the following terms is NOT directly associated with redundant power supply?
a. Hot swap
b. Primary/secondary circuits
c. Failover
d. Stack overflow
Answer: d. Stack overflowracksolutions+1
Where are redundant PDUs typically found?
a. Home offices
b. Enterprise server racks
c. Network printers
d. Laptop batteries
Answer: b. Enterprise server rackssynaccess+1
Which element in the data center chain primarily ensures the conversion of power for equipment?
a. Network switch
b. Power Distribution Unit (PDU)
c. Load balancer
d. SSD drive
Answer: b. Power Distribution Unit (PDU)contabo+1
A dual-corded server is designed to connect to:
a. Only one power chain
b. Two independent power sources
c. One generator
d. No external supply
Answer: b. Two independent power sourcessynaccess+1
What is the primary distinction between redundancy and UPS?
a. Redundancy is inside the server, UPS is external backup
b. UPS provides network redundancy
c. UPS manages network traffic
d. Redundancy increases storage
Answer: a. Redundancy is inside the server, UPS is external backupracksolutions+1
What is the main reason for implementing power redundancy in cloud systems?
a. To increase power consumption
b. To prevent service interruptions
c. To enable software patches
d. To save network bandwidth
Answer: b. To prevent service interruptionsinterviewquizz+2
What do most modern redundant power supplies support?
a. Manual restart
b. Hot swap
c. Lower output voltage
d. Single circuit input
Answer: b. Hot swapracksolutions+1
In a cloud environment, which critical system is most protected by redundant power?
a. Graphic design PCs
b. Core network servers
c. Individual desktop workstations
d. USB hubs
Answer: b. Core network serverscontabo+2
What happens in a power redundant rack during a main power feed failure?
a. Immediate shutdown
b. Backup power feed supplies power
c. Server enters power-save mode
d. Cooling stops working
Answer: b. Backup power feed supplies powersynaccess+1
Which describes N redundancy?
a. No backup is present
b. A single backup supply
c. Double the backup
d. Triple redundancy
Answer: a. No backup is presentsocomec+1
What type of redundancy would be excessive for a small cloud environment concerned with cost?
a. N redundancy
b. 2N+1 redundancy
c. N+1 redundancy
d. Manual failover
Answer: b. 2N+1 redundancysocomec+1
What is the best solution for temporary power loss in a data center?
a. SSD cache
b. UPS system
c. Single-phase monitor
d. RAID array
Answer: b. UPS systemcontabo+1
Which device allows remote monitoring of power usage and switching?
a. Legacy PDU
b. Smart PDU
c. DSL modem
d. Backup generator
Answer: b. Smart PDUsynaccess
Which option ensures sustained data center operation in case of total utility failure?
a. Redundant network interfaces
b. Multiple emergency generators
c. Air conditioning only
d. Single-phase power
Answer: b. Multiple emergency generatorscontabo+1
What is typically the minimum redundancy standard for mission-critical cloud services?
a. No redundancy
b. N+1 redundancy
c. N redundancy
d. N-1 redundancy
Answer: b. N+1 redundancyliquidweb+1
What should redundant power supplies be regularly checked for?
a. Cleanliness and connectivity
b. File system integrity
c. DNS resolution
d. Database backup frequency
Answer: a. Cleanliness and connectivityracksolutions
What is the role of a rack-mount UPS in a redundant system?
a. Provides network redundancy
b. Supplies short-term backup power
c. Cools the rack
d. Loads OS
Answer: b. Supplies short-term backup powersynaccess+1
Why must cloud providers use geographically distributed data centers with redundant power?
a. For legal compliance
b. To maximize uptime in all regions
c. To improve network bandwidth
d. To reduce storage requirements
Answer: b. To maximize uptime in all regionsinterviewquizz
If one redundant power supply is disconnected for service, what is the impact on a running server?
a. Immediate shutdown
b. Server continues uninterrupted
c. Data is lost
d. Hardware fails
Answer: b. Server continues uninterruptedracksolutions+1
Redundant power supplies eliminate which main point of failure?
a. Network port
b. Single power source
c. Application error
d. Software crash
Answer: b. Single power sourceracksolutions+1
What should each PDU in a dual-redundant setup ideally supply?
a. All power to all devices
b. Separate power to different redundant supplies
c. Network connectivity
d. Only backup power
Answer: b. Separate power to different redundant suppliescontabo+1
In redundant power architecture, what is the “failover” process?
a. Automatic switchover to backup
b. Manual power switch
c. Scheduled reboot
d. Maintenance shutoff
Answer: a. Automatic switchover to backupracksolutions+1
What do modern data centers often use for more flexible power delivery?
a. Overhead bus systems
b. Single underfloor cabling
c. Power strips
d. Patch panels
Answer: a. Overhead bus systemscontabo
During normal operations, how is power provided in a server with two redundant supplies?
a. Only one supply is active
b. Both supplies share the load
c. One acts as a cold backup
d. Both are inactive
Answer: b. Both supplies share the loadracksolutions+1
If only one power supply unit in a redundant pair has experienced a fault, what should be done?
a. Shut down the server
b. Hot swap the failed unit
c. Ignore the fault
d. Increase server load
Answer: b. Hot swap the failed unitracksolutions
Which statement is true about 3N/2 redundancy?
a. Three power supplies for every server
b. Power for three servers shared by two
c. Provides extra power above minimum
d. No backup
Answer: c. Provides extra power above minimumsocomec+1
What additional feature do smart PDUs offer for managing redundancy?
a. Firmware upgrades
b. Remote switching and metering
c. Data encryption
d. Network redundancy
Answer: b. Remote switching and meteringsynaccess
What is the main function of a circuit breaker in power distribution?
a. Allocate IP addresses
b. Protect circuits from overloads
c. Cool the device
d. Monitor network
Answer: b. Protect circuits from overloadssynaccess+1
Which system is integral for uninterrupted data center operation during extended outages?
a. Solar power only
b. Emergency generator
c. CPU cooler
d. Rack switches
Answer: b. Emergency generatorcontabo+1
Redundant power is considered critical for which cloud characteristic?
a. Elasticity
b. High availability
c. Scalability
d. Cost optimization
Answer: b. High availabilityinterviewquizz+1
The redundancy in power supply is primarily aimed at preventing which issue?
a. Network latency
b. Data loss from power failure
c. OS spoofing
d. Resource overcommitment
Answer: b. Data loss from power failureinterviewquizz+1
What should be regularly tested to ensure redundant power supply effectiveness?
a. Backup switchover
b. Printer ink levels
c. Patch cable shielding
d. OS version
Answer: a. Backup switchovercontabo+1
What does “geographic redundancy” add to a data center’s power design?
a. Increased storage space
b. Enhanced resilience by using multiple locations
c. Redundant Wi-Fi
d. Lower latency only
Answer: b. Enhanced resilience by using multiple locationsinterviewquizz
Why is server power redundancy not usually implemented in average desktop computers?
a. Not cost-effective for home use
b. No need for high uptime
c. Single power supply suffices
d. All of the above
Answer: d. All of the abovesynaccess+2

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