Last updated on Jan 08, 2024
If you're looking to advance your electronics skills and want to be an expert in EMC technology, then you can explore the following EMC interview questions and answers. These interview questions are prepared in a simple, understandable way with the help of top industry experts at HKR. EMC, or electromagnetic compatibility, is the ability of an electrical device to define how a product works with other products in its environment. There is a good demand for EMC skills across many companies, and it holds a good market share.
We have compiled a list of top EMC interview questions with answers that are most frequently asked. Explore these questions and prepare well for the interviews to get into a suitable career in the field of electronics.
Most Frequently asked EMC Interview Questions
Ans. The term "EMC" refers to electromagnetic compatibility, which allows different electronic devices to function together without causing mutual interference. In an electromagnetic environment, EMC creates a link between electrical and electronic devices. Every electrical gadget can release a variety of electromagnetic fields. It eliminates the need for mutual contact and aids in limiting accidental generations and spread.
Ans. LUN refers to a logical unit number, which provides a host with an authenticated activity. Applying LUN is possible at the HBA Level, or HOST bus adapter. Further, LUN masking minimizes data loss and makes the LUN mask system unusable by other OS in addition to being used for writing volume labels at Windows-based servers.
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Ans. The critical components utilized in the EMC environment are listed below. These include:
The following is an essential code:
Fcp-bind-WWNN = “50060XY484411 cdc11: ipfc0t1”,
“50060xy4411 c6c12: lpfc1t2”;
The sd.conf file looks like:
Name = “sd” parent = “ipfc” target =1 lun =0;
Name = “sd” parent = “ipfc” target =2 lun =0;
Ans. To answer your question, a logical reference that is valid for the entire physical disk is a logical unit number or LUN. A LUN represents a piece of a physical disk, disk volume, or storage subsystem.
Ans. A HBA's maximum IOPS can be computed using the formula below.
(Device Queue depth per LUN * (1 / Storage latency in ms/1000)))
Ans. The name servers in the devices are used mainly by Wmn zoning to either permit or prohibit access to the fabric.
The principal benefits of Wmn Zoning are as follows:
Ans. The following are the key differences between the soft and hard zoning.
Ans. The following functions are carried out by the device masking architecture, including
Ans. The following are the main elements that will be taken into account when creating a San;
Here, three distinct tiers will be utilized;
Level 1: 99.999% uptime with 5 minutes of annual downtime.
Tier 2 levels: 99.9% availability (8.8 hours on average per year, with a maximum of 13.1 hours)
Tier 3 levels: 3.7 days/year downtime with 99% availability.
Ans. The interrelation between rotational and latency speed are as follows:
Latency time = (1/((Rotational speed in Rotation per min/ 60)) * 0.5 * 1000 milliseconds
Latency and Rotation per minute:
HDD Spindle RPM Avg. Rotational Latency [milli secs]
Ans. The general techniques for accessing SAN storage from an array are listed below.
Ans. The formula is as follows;
Total approx. drives = (RAID groups IOPS/(Hard drive type IOPS)) + large Random I/O adjustment + Hot spares + System drives.
To determine a hard disk drive's IOPS:
IOPS = ---------.
Average seek time + Average delay (latency)
To determine IOPS within a RAID:
(Total workload IOPS * % of the workload, i.e., read operations) + (Total workloads IOPS * % of workload that is read operations * RAID I/O penalty).
Ans. Capacity = Heads X Cylinders X Sectors X Block Size
Ans. Represents the number of buffers= BB_credits = [port speed] * [round trip time] / [Frame size].
Ans. The buffer-to-buffer credits or BB credits are helpful in transmission flow control through a Fibre Channel technology. They show the number of frames that a port stores. Moreover, the interface of the Fiber Channel uses buffer credits that make sure that all the packets reach their destination. To Flow-control technique to prevent frame drops in Fiber Channel transitions by avoiding buffer exhaust. Minimizing the BB credits provided to each port can improve the overall speed. It is what BB credits all about.
Ans. The following are the load balancing policies applicable in inter-switch links:
Conclusion
Thus, you have explored the frequently asked EMC interview questions and answers designed by the experts at HKR Trainings. These questions are helpful to enhance your skills in hardware gadgets for both freshers and experienced individuals. I hope you found this article on EMC interview questions helpful for your upcoming interviews in this field.
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