MCQs

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Overall MCQs for Reference

What does RPM stand for in the context of hard drive technology?
a. Rotations per minute
b. Random process memory
c. Rear panel motherboard
d. Resource power management
Answer: atestbook+1
Which typical RPM value do server hard drives commonly use?
a. 1200
b. 7200
c. 500
d. 12000
Answer: btestbook+1
What is the primary function of a higher RPM in server disks?
a. Consumes less power
b. Increases data access speed
c. Increases network speed
d. Decreases disk capacity
Answer: btestbook
If a hard drive operates at 6000 RPM, how long does it take for one full rotation?
a. 1 second
b. 0.01 second
c. 0.1 second
d. 10 seconds
Answer: btestbook
Which RPM class is usually found in enterprise-grade server HDDs?
a. 4200
b. 5400
c. 7200
d. 10000
Answer: dtestbook+1
What is the average rotational latency for a disk running at 7200 RPM?
a. 2.5 ms
b. 4.2 ms
c. 8.3 ms
d. 6.7 ms
Answer: dtestbook
A disk spinning at 5400 RPM completes how many rotations in one second?
a. 36
b. 90
c. 120
d. 60
Answer: btestbook
What does a higher RPM typically result in for hard drives?
a. Lower heat output
b. Higher power consumption
c. Larger disk size
d. Longer data retention
Answer: btestbook
What would the average latency be for a 6000 RPM disk?
a. 0.005 seconds
b. 0.01 seconds
c. 0.02 seconds
d. 0.001 seconds
Answer: atestbook
Which of the following RPM ratings is characteristic of some high-performance SAS drives?
a. 10000 RPM
b. 3600 RPM
c. 4800 RPM
d. 5400 RPM
Answer: atestbook
Lower RPM values in drives usually lead to:
a. Higher noise
b. Lower power consumption
c. Faster seek times
d. More heat
Answer: btestbook
An HDD with 15000 RPM has a rotational latency of approximately:
a. 4 ms
b. 3 ms
c. 2 ms
d. 1 ms
Answer: ayoutube
Rotational latency is calculated based on:
a. Full revolution
b. Half a revolution
c. Quarter revolution
d. Double revolution
Answer: btestbook
Which RPM is typically used in laptop hard drives?
a. 5400 RPM
b. 10000 RPM
c. 15000 RPM
d. 3000 RPM
Answer: atestbook+1
The maximum rotational delay for a disk operating at 5400 RPM is:
a. 0.055 sec
b. 0.011 sec
c. 0.044 sec
d. 0.5 sec
Answer: btestbook
What does increasing HDD RPM most directly impact?
a. Storage density
b. Data transfer rate
c. Disk form factor
d. Power cable requirement
Answer: btestbook+1
A 7200 RPM HDD completes how many revolutions per minute?
a. 72
b. 360
c. 7200
d. 72000
Answer: ctestbook
Which is not a true statement about server HDD RPM?
a. Higher RPM increases latency
b. Higher RPM increases transfer speed
c. Lower RPM reduces noise
d. Lower RPM saves power
Answer: atestbook
The typical rotational speed for archival or cold storage drives is:
a. 15000 RPM
b. 10000 RPM
c. 7200 RPM
d. 5400 RPM
Answer: dtestbook
If a disk spins at 15000 RPM, one rotation takes about:
a. 1.5 ms
b. 4 ms
c. 0.4 ms
d. 6 ms
Answer: byoutube
Which component’s performance is most directly affected by HDD RPM?
a. Network interface
b. CPU
c. Seek time
d. Disk I/O
Answer: dtestbook
What is the formula for time per rotation of a 6000 RPM disk?
a. 60/6000
b. 6000/60
c. 6000×60
d. 60×6000
Answer: atestbook
Average rotational delay is generally estimated by:
a. One full revolution
b. One quarter revolution
c. Half a revolution
d. Two revolutions
Answer: ctestbook
For a 7200 RPM drive, half a revolution takes approximately:
a. 4.17 ms
b. 8.34 ms
c. 2.08 ms
d. 7.20 ms
Answer: atestbook
In server environments, which combination is critical for performance?
a. High RPM, low heat
b. Low RPM, high seek
c. High RPM, high capacity
d. Low capacity, high price
Answer: ctestbook+1
SSDs are not measured in RPM because:
a. They are slower
b. They have no moving parts
c. They are larger
d. They use optical disks
Answer: btestbook
If an HDD’s average rotational latency is 4ms, how fast is it spinning?
a. 15000 RPM
b. 10000 RPM
c. 7200 RPM
d. 5400 RPM
Answer: ayoutube
Rotational latency depends on:
a. Access time
b. RPM
c. Disk size
d. Power rating
Answer: btestbook
The time for one rotation on a 10000 RPM disk is:
a. 6 ms
b. 0.6 ms
c. 10 ms
d. 36 ms
Answer: cgeeksforgeeks
What is a disadvantage of very high RPM HDDs?
a. Less data loss
b. Lower noise
c. Higher heat and power
d. Lower access speed
Answer: ctestbook
Which is an industry-standard RPM for high-end workstation drives?
a. 3600
b. 5400
c. 7200
d. 10000
Answer: dtestbook
What happens if an HDD RPM exceeds its rated maximum?
a. Better reliability
b. Catastrophic failure
c. Lower temperatures
d. More capacity
Answer: btestbook
A 5400 RPM drive will rotate how many times in 10 seconds?
a. 5400
b. 900
c. 54
d. 9000
Answer: btestbook
Average rotational latency (in seconds) for a drive spinning at N RPM is:
a. 30/N
b. 60/N
c. 1/N
d. N/2
Answer: atestbook
Why do servers often use higher RPM drives?
a. Lower costs
b. Improved IOPS
c. Lower vibration
d. Larger size
Answer: btestbook
What would be the effect of a failed spindle motor in a hard disk?
a. Faster spin
b. Reduced capacity
c. No movement (0 RPM)
d. Double RPM
Answer: ctestbook
A 15000 RPM drive has what time for a complete revolution?
a. 6 ms
b. 4 ms
c. 0.4 ms
d. 10 ms
Answer: byoutube
Which is not affected by HDD RPM?
a. Data transfer speed
b. Rotational latency
c. Seek time
d. Storage capacity
Answer: dtestbook
Typical RPM value for desktop SATA drives:
a. 7200
b. 10000
c. 12000
d. 4200
Answer: atestbook
What causes more noise in HDDs?
a. Lower RPM
b. High RPM
c. Large cache
d. Small form factor
Answer: btestbook
Data is read from which component that rotates in an HDD?
a. Cache
b. Platter
c. Spindle
d. PCB
Answer: btestbook
Rotational speed in SSDs is:
a. 10000 RPM
b. 0 RPM
c. 7200 RPM
d. 3600 RPM
Answer: btestbook
Average rotational delay for 5400 RPM disk is about:
a. 5.56 ms
b. 4.11 ms
c. 8.34 ms
d. 11.1 ms
Answer: atestbook
High RPM is especially important for:
a. Sequential reads
b. Random read/writes
c. Cold storage
d. Tape backup
Answer: btestbook
What determines maximum rotational delay?
a. RPM
b. Number of heads
c. Seek time
d. Disk capacity
Answer: atestbook
Which disk RPM is likely to use less energy?
a. 15000 RPM
b. 10000 RPM
c. 7200 RPM
d. 5400 RPM
Answer: dtestbook
A hard disk’s rotational period at 6000 RPM is:
a. 0.01 sec
b. 0.1 sec
c. 0.001 sec
d. 1 sec
Answer: atestbook
Servers needing faster access prefer which RPM?
a. 5400
b. 7200
c. 10000 and above
d. Below 5000
Answer: ctestbook
What hardware manages the RPM of a server HDD?
a. Firmware and spindle motor
b. CPU
c. RAM
d. Cache
Answer: atestbook
The RPM specification for a hard disk can usually be found:
a. On the disk label/model number
b. In BIOS only
c. On the RAM chip
d. On the power cable
Answer: alearn.microsoft+1

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