Systems Administrator Interview Questions and Answers 2021

By Aradhya Kumar 

Last updated on Mar 30 2021

Systems Administrator Interview Questions and Answers 2021

Latest Systems Administrator Interview Questions and Answers 2021


Is it true that you are searching for a skilled System Administrator for your company? Recognizing the correct possibility for this specialized position can be troublesome.

Here are some significant inquiries addresses you ought to request to assess the specialized and non-specialized abilities of the competitors showing up for the post of System Administrator.

The execution of the organization's IT systems like equipment, programming, and organization relies upon the systems administrator interview questions.

System Administrators make the main resource in an organization, so competitors need to have brilliant investigating abilities.

Likewise, they ought to have the option to disclose specialized subtleties to a non-specialized crowd. In this way, while meeting, dissect the information on IT best acts of the applicants.

A system administrator needs to manage issues, for example, updating workers and introducing applications and sponsorship up and recuperating information.

Along these lines, it is astute to pick applicants with expansive specialized foundations.

This profoundly capable position requires somebody with fantastic investigating abilities.

They ought to have the option to disclose specialized subtleties to a non-specialized crowd in a straightforward way.

Major abilities to look for in candidates:

  • MCSE and RHCE certifications.
  • Prophet Linux system admin.
  • Information on CompTIA Server+

VCP6-DCV: VMware Guaranteed Proficient 6 – Server farm Virtualization

While meeting a possibility for the post of system admin, ask the accompanying significant meeting inquiries:


Operational and Situational Questions


  • Assume you attempt to fix an issue, yet your endeavor fizzles. How will you respond?
  • How might you help a representative experiencing difficulty joining a video call while telecommuting?
  • In the event that a representative requests that you assist with a sluggish PC, how might you analyze the issue?
  • In the event that a few workers whine about their web speed, how might you deal with recognize the issue?
  • What are the three significant credits of an incredible Frameworks Chairman?
  • How might you handle the most noticeably terrible infection issue?


Role-specific Questions


  • What is the distinction between Windows Genius, Windows Home, and Windows Worker?
  • For what reason would it be advisable for us to utilize outside media like hard plates for reinforcements?
  • Portray the arrangement cycle for a printer in Windows 10.
  • How might you share two screens with a solitary Framework?
  • What is trash assortment?
  • What are the primary Email Workers and which are their ports?
  • As indicated by you, how frequently and for what reason do we need to redesign a worker?
  • How might you recharge your IP address from the order brief?


Social Questions


  • How would you focus on your assignments?
  • Did you at any point run into a circumstance when you didn't have a clue how to determine an issue? How could you handle that?
  • Do you lean toward working separately or in a group?
  • How would you stay refreshed with the most recent IT advancements?


List of Top Systems Administrator Interview Questions and Answers 


Q1. What are the contrasts between a domain and a workgroup?

Ans: In a domain, at least one PCs can be a worker to deal with the organization. Then again in a workgroup, all PCs are peers having no control over one another. In an area, the client needn't bother with a record to sign in on to a particular PC if a record is accessible on the space. In a workgroup, the client needs to have a record for each PC. In an area, PCs can be on various nearby organizations. In a workgroup, all PCs should be a piece of a similar nearby organization.

Q2. What are the individual qualities of a system administrator?

Ans: System admin is a specialist at dealing with equipment and programming. They are snappy with both their hands and their head. They can work alone, however, they realize when and how to speak with others, regardless of whether to report issues, gain proficiency with the data expected to fix issues, or educate representatives in regards to technical issues.

Q3. What is PPP protocol?

Ans: Highlight Point protocol helps correspondence between 2 PCs over a sequential link, telephone line or other fiber optic lines. For example Association between a web access Supplier and a host. PPP additionally gives confirmation. PPP works by sending Solicitation bundles and hanging tight for Recognize parcels that acknowledge, reject or attempt to change the solicitation. The convention is likewise used to haggle on network address or pressure choices between the hubs.

Q4. What are Ping and Tracert?

Ans: Ping and tracert are the orders used to send data to some distant PCs to get some data. Data is sent and gotten by bundles. Ping is utilized to check if the framework is in network or not. It additionally gives parcel lost data. In windows ping order is composed as ping ip _address. Tracert is called as follow course. It is utilized to track or follow the way the parcel takes from the PC where the order is given until the objective. In windows ping order is composed as tracertip_address.

Q5. What is IP spoofing? And how spoofing works?

Ans: Spoofing is a particular sort of digital assault wherein somebody endeavors to utilize a PC, gadget, or organization to deceive other PC networks by taking on the appearance of a genuine substance.

It's one of the numerous instruments programmers use to access PCs to dig them for touchy information, transform them into zombies (PCs took over for noxious use) or dispatch Refusal of-Administration (DoS) assaults. Of the few kinds of ridiculing, IP parodying is the most widely recognized.

To begin, a touch of foundation on the web is altogether. The information sent over the web is initial broken into different bundles, and those parcels are communicated freely and reassembled toward the end. Every parcel has an IP (Web Convention) header that contains data about the bundle, including the source IP address and the objective IP address.

In IP spoofing, a programmer utilizes instruments to alter the source address in the parcel header to make the getting PC system think the bundle is from a confided-in source, like another PC on a real organization, and acknowledge it. Since this happens at the organization level, there are no outer indications of altering.

Q6. What experience do you have with hardware parts?

Ans: Establishment and substitution are probably the most much of the time performed tasks with equipment. In some cases a framework executive may have to remake an equipment part.

Q8. Where is the AD database put away?

Ans: The Promotion information base is put away in C:\Windows\NTDS\NTDS.DIT.

Q9. What are NETBIOS and NETBEUI?

Ans: NETBIOS is a programming interface that permits 1/0 solicitations to be shipped off and gotten from a far off PC and it conceal the systems administration equipment from applications. NETBEUI is NetBIOS broadened UI. A vehicle convention planned by Microsoft and IBM is for the utilization on little subnets.

Q11. What is the SYSVOL folder?

Ans: The SYSVOL organizer stores the worker duplicate of the area's public documents that should be shared for regular access and replication all through a space. All Advertisement data sets are put away in an SYSVOL organizer and it's just made in an NTFS parcel. The Dynamic Registry Data set is put away in the %SYSTEM ROOT%NDTS envelope.

Q12. What is Junk assortment?

Ans: Trash assortment is the online defragmentation of the Dynamic Registry which happens at regular intervals.

Q13. When do we use WDS?

Ans: Windows solution services are a worker job used to send Windows working systems distantly. WDS is chiefly utilized for network-based operating system establishments to set up new PCs.

Q14. Clarify RSVP. How can it work?

Ans: Resource Reservation protocol is utilized to save assets across an organization. It is utilized for mentioning a particular Nature of Administration (QoS) from the organization. This is finished via conveying the solicitation (that needs a booking of the asset) of the host all through the organization. It visits every hub in the organization.

<>p RSVP utilized two nearby modules for reservation of assets. Affirmation control module affirms if there are adequate accessible assets while strategy module checks for the consent of reserving a spot. RSVP offers adaptability. On a fruitful consummation of the two checks RSVP utilizes the parcel classifier and bundle scheduler for the ideal Qos mentioned.

Q15. What is frame relay?

Ans: Edge hand-off is high velocity information correspondence innovation that works at the physical and information interface layers of the OSI model.Frame hand-off utilizes outlines for information transmission in an organization.

Q16. What are Lingering things?

Ans: Lingering item is an erased Advertisement object that actually stays on the reestablished space regulator in its nearby duplicate of Dynamic Registry. They can happen when changes are made to indexes after framework reinforcements are made.

While reestablishing a reinforcement document, Dynamic Registry, by and large, necessitates that the reinforcement record be close to 180 days old. This can occur if, after the reinforcement was made, the article was erased on another DC over 180 days prior.

Q17. For what reason would it be advisable for you to not reestablish a DC that was supported up a half year prior?

Ans: While reestablishing a reinforcement record, Dynamic Index for the most part necessitates that the reinforcement document be close to 180 days old. In the event that you endeavor to reestablish a reinforcement that is terminated, you may deal with issues because of waiting items.

Q18. Clarify the idea of DHCP.

Ans: Dynamic Host Design Convention is utilized allocating IP delivers to PCs in an organization. The IP addresses are relegated powerfully. Unquestionably, utilizing DHCP, the PC will have an alternate IP address each time it is associated with the organization. Sometimes the IP address may change in any event, when the PC is in-network. This implies that DHCP leases out the IP address to the PC for quite a while. Clear benefit of DHCP is that the product can be utilized to oversee IP address as opposed to the director.

Q19. Which job do qualities, for example, self-assuredness and critical thinking play in the vocation of a framework head?

Ans: Insightful reasoning and critical thinking is significant to have the option to examine programming or equipment breakdown. They are likewise important to have the option to improve or overhaul frameworks so they suit organization needs. Emphaticness additionally assumes a part since executives need to decide. They settle on arrangements, safety efforts, and things like framework updates.

Q20. What are principal Email servers and which are their ports?

Ans: Email workers can be of two kinds:

Approaching Mail Worker (POP3, IMAP, HTTP)

The approaching mail worker is the worker-related with an email address account. There can't be more than one approaching mail worker for an email account. To download your messages, you should have the right settings designed in your email customer program.

Active Mail Worker (SMTP)

Most cordial mail workers use SMTP (Basic Mail Move Convention) for sending messages. The active mail worker can have a place with your ISP or to the worker where you arrangement your email account.

The primary email ports are:

POP3 – port 110

IMAP – port 143

SMTP – port 25

HTTP – port 80

Secure SMTP (SSMTP) – port 465

Secure IMAP (IMAP4-SSL) – port 585

IMAP4 over SSL (IMAPS) – port 993

Secure POP3 (SSL-POP) – port 995


List of System Administrators Advanced Interview Questions 

1.Q: What does Active Directory mean?

A: The dynamic Registry implies a help that distinguishes and handles assets, making them noticeable for various gatherings or individuals that are approved. It has the job of an item store. The Dynamic index sees as articles workstations, individuals, workers gadgets or archives and they all have their own qualities and access control rundown or leg tendon.

2.Q: What is the meaning of Global Catalog?

A: A Worldwide Index is something that every area has, and it is utilized for validating the client on the organization, on windows 2000 organization logon's were shielded from disappointments by relegating a Worldwide Inventory to each site.

3.Q: What is the utilization for DHCP?

A: DHCP is utilized for the DHCP workers; PCs can get their design from a DHCP worker on an IP arrangement. The worker thinks nothing about the PCs until they ask for data. Generally the most well-known data sent is IP address and DHCP is utilized to make a huge organization simpler.

4.Q: What does a Super Extension do in DHCP?

A: The Super Extension gives the DHCP worker the likelihood to have leases to various customers on a similar actual organization. The leases come from numerous degrees. All degrees should be characterized utilizing DHCP chief before the Super Extension creation and they are named part scopes. The DHCP issues can be settled by the Super Degree in various manners like the accompanying:

  1. a) On an actual organization like a LAN network where different legitimate IP networks exist Super Extension is exceptionally valuable here. These kinds of organizations are likewise named multinets.
  2. b) There is additionally need for a Super Degree when the location pool for the current extension gets vacant and there is a requirement for new PCs on the actual organization.
  3. c) When customers need to precede onward another degree.
  4. d) When DHCP customers from the opposite side of the transfer specialists (BOOTP) or the organization has numerous sensible subnets.
  5. e) When standard organizations are restricted to renting addresses for the customers.

5.Q: How might we switch the parts in a Functioning Catalog?

A: Exchanging or moving jobs in a Functioning Index can be utilized Ntdsutil.exe.

6.Q: What is the reason for a Stub zone DNS?

A: The duplicate of a zone that has just the required assets for tracking down the legitimate DNS workers in that particular zone (DNS= Space Name Workers) is known as a Stub zone. It additionally settle names for DNS namespaces, thing required when names should be settled from two distinctive DNS namespaces. The Stub zone contains: the expert worker's IP that is utilized for refreshing the Stub zone and the SOA (Beginning of Power), the NS (name worker) and the paste A designated zone records.

5.Q: What fundamental record is utilized for Dynamic Registry reinforcement and how it is made?

A: Functioning Registry reinforcement is made utilizing the NTbackup utility. The reinforcement is made once with the framework state and they are reestablished additionally together with in light of the fact that they rely upon one another. The framework state has various parts like:

  1. a) The registry
  2. b) Boot documents or startup records (documents needed by the working framework to begin).
  3. c) The segment administrations
  4. d) The framework volume or the SYSVOL envelope is an organizer that contains documents that are shared on a space.
  5. e) The Dynamic Registry

6.Q: Does a windows administrator must be basic?

A: Yes and I can clarify how. A system head is liable for a whole organization which implies he/she should deal with various things simultaneously which is certainly not a simple undertaking. To accomplish this, an executive should have high hierarchical abilities and high specialized information and he/she should keep the issues from happening so he/she will not need to be compelled to fix them.

Complicated System Administrator Interview Questions

7.Q: How is the forward query zone not the same as the converse query zone in NDS?

A: There is one distinction between these two: the forward query implies name to IP and switches query implies IP to name.

8.Q: As a framework overseer would you be able to make reinforcement and recuperation of information?

A: This is a duty that any system administrator more likely than not expected as a fundamental expertise. Obviously, there are numerous kinds of reinforcement that can be made however all should be known for a fruitful profession.

9.Q: What is the significance of DHCP and what is the port utilized by it to work?

A: DHCP or Dynamic Host Setup Convention can allot an IP naturally, this is done indeed by the worker and has a number reach. At the point when the system begins an IP is allotted consequently. The DHCP worker has port number 68, while the customer has 67.

10.Q: Would you be able to guarantee a updated system constantly and perform statistical surveying?

A: Keeping awake to-date is another solid mark of an expert executive, innovation advances and we should stay aware of the stream, else we can't take care of our work in an expert manner. Statistical surveying is the way to up-to-date work.

11.Q: Is it feasible for a PC to have the option to peruse the web without having a default entryway?

A: Yes it is the length of we utilize a public IP address. The door is needed as a switch or firewall when utilizing an intranet address.

12.Q: What are the benefits or weaknesses of utilizing DHCP?

A: The benefit is that the DHCP worker designs all IPs naturally and the hindrance is that when you get another IP address the machine name stays as before in view of its relationship with the IP. It is anything but a genuine issue yet when someone attempts to get to the machine by its name it become one.

13.Q: Would you say you know about monitoring?

A: Indeed, checking is a base movement of a framework executive, he/she deals with all the entrance rights and the worker space, security of the client accounts is perhaps the main things here. Additionally a manager should ensure that the client's action doesn't influence in any capacity the uprightness of the worker.

14.Q: How might we make a SRV record in DNS?

A: To do this we should open the DNS then we should choose the abc.local space the correct snap and we should go to Other New Records and the SRV ( pick area).

15.Q: In how long are the security changes applied on the space regulators?

A: Including strategies for individual and public lockout, the progressions apply right away. The progressions likewise incorporate passwords and LSA or Neighborhood Security Authority.

16.Q: What do you do if an end client expresses that a record is no more?

A: Records are erased continually by end clients yet the reinforcement can reestablish them. In any case prior to utilizing the reinforcement we should check if the client didn't move the record accidentally in somewhere else.

17.Q: Where is the capacity spot of the natural settings and reports from the roaming profile?

A: These archives and settings are kept locally until the client's log off when they are moved into the common organizer from the worker so the sign on at a new system may take some time along these lines.

18.Q: What are the classes that we can discover in the Dynamic Index of Windows Worker 2003?

A: We can discover:

  1. a) The theoretical class which can be made to resemble a layout and make different formats, regardless of in the event that they are conceptual, assistant or underlying.
  2. b) The underlying class is the significant sort of class that is produced using numerous theoretical classes or a current primary class. They are the solitary ones that can make Dynamic Catalog objects.
  3. c) The assistant class is utilized as a swap for some credits of an underlying class, it is a rundown of qualities.
  4. d) The 88 class is utilized for objects classes that were characterized before 1993 and it's anything but a typical class, it doesn't utilize conceptual, underlying, or helper classes.

19.Q: When is a decent an ideal opportunity for making a backwoods?

A: Specific organizations that have various bases require various trees and separate namespaces. Furthermore, remarkable names in some cases bring forth various characters of DNS. Likewise organizations are once in a while obtained and get under different impacts however the progression should be protected for the names.

20.Q: Would you be able to disclose to us about you experience in the past with respect to windows organization?

A: I have ten years of involvement with this field, I was energetic about PCs since youth and I introduced many working frameworks at home and inside associations including these renditions of windows: 95, 98, 98 SE, NT, Millenium, 2000, 2003 Worker, XP, Seven, Vista. I likewise dealt with these frameworks and performed support, I worked with various applications from the windows climate.

21.Q: How might you handle a circumstance where for example in the event that you have an application that isn't running on Windows 2003 in light of the fact that it's more seasoned?

A: In the present circumstance the application must be begun in the similarity mode with a formerly windows working framework. This is made by right tapping the application symbol and picking another Windows from the similarity menu.

22.Q: What is the importance of Repadmin.exe from Windows Server 2008?

A: Repadmin.exe implies Replication Diagnostics Device and helps for the symptomatic of space regulators in the Windows system. This device is utilized by directors to see the replication geography from the point of view of each space regulator. The dynamic Registry backwoods can likewise be directed by Repadmin.exe and replication issues can be followed.

23.Q: What improvement would we be able to discover in the utilization of CSVDE versus LDIFDE?

A: CSVDE and LDIFDE are the two orders and are utilized for bringing in and trading objects yet they are diverse in the manner that CSVDE utilizes the arrangement CSV (Comma Isolated Worth) which is a Dominate record for documents and LDIFDE utilizes LDIF (LDAP Information Exchange Organization) document type which can be seen with a straightforward content tool. LDIFDE can be additionally utilized for altering or erasing objects dissimilar to CSVDE.

24.Q: What enormous contrasts exist between these two working frameworks: Windows 2000 and Windows XP?

A: Windows 2000 has a bigger number of abilities than Windows XP particularly with respect to highlights like DHCP, Terminal Administrations or DNS. It has every one of the benefits for worker utilization. Windows 2000 is somewhat more expert than XP, yet they are both accompanying various renditions for each client taste. While XP has Home form, Proficient or Endeavor, Windows 2000 has Proficient and Worker versions. The Home adaptation of XP accompanies negligible highlights on the grounds that the objective customers are fledglings.

25.Q: What are the things that make Unix not quite the same as Windows?

A: The code stacking runtime of Unix is not the same as the one that Windows has. We should get mindful of how the framework precisely functions before we make a progressively stacking module.

Unix has the common items with the .so expansion that exemplify lines of code that the projects will utilize and the capacities names. These capacity names become the references of those capacities in the memory of the program when the record is joined with the program. In Windows, the .dll document (dynamic-connect library record) doesn't have references and the code of the records doesn't connect to the memory of the program yet they overcome a query table that focuses on information or capacities.

Unix has only one kind of library record, with the .an expansion and the code of many item documents is contained inside with the .o augmentation. At the point when the connection is made for a common item record, the meaning of the identifier may not be found, so the article code from the library will be incorporated.

Organizations: Utilize Our Tests for Screening

Need to rehearse your system administration abilities for a forthcoming new job interview? Take a stab at tackling these system Organization inquiries addresses that test information on designing and keeping up system programming, equipment, and PC systems, particularly workers. We'll give input on your answers, and you can utilize a clue on the off chance that you stall out.

These System Administration questions are instances of genuine assignments utilized by businesses to screen work up-and-comers like framework overseers, sysadmins, systems administrator interview questions, and others that require information on PC programming and equipment.

An organization intends to buy PCs for its representatives so they can telecommute. The last choice to be made is which sort of capacity gadget to place into every PC, in view of the kind of day-by-day undertakings every representative does.

How might a typical SSD contrast with a typical HDD?

  • (Select every worthy answer.)
  • SSD will have a more exorbitant cost for each gigabyte.
  • SSD will be noisier.
  • SSD will duplicate huge records quicker.
  • SSD will be more impervious to harm if the PC falls.
  • SSD will for the most part give a bigger limit.
  • SSD will give more IOPS.

A startup is utilizing an in-house stockpiling framework that gives security if there should arise an occurrence of single-plate disappointments, yet this ended up being lacking.

Which of the accompanying setups can give twofold plate disappointment assurance on any two circles in the arrangement?

(Select all acceptable answers.)

4-disk RAID 0.

3-disk RAID 1.


3-disk RAID 5.

4-disk RAID 01 (RAID 0+1).

Media ServerSYSTEM administration NAS Stockpiling Frameworks NEW Open Simple

To make a media worker that will store preparing recordings for the representatives of an association, an Organization Joined Capacity (NAS) arrangement is picked. Select the alternatives that effectively depict a NAS arrangement.

(Select every adequate answer.)

  • NAS establishment and setup is in every day more costly and complex than SAN.
  • NAS utilizes document-level stockpiling for putting away information.
  • NAS utilizes object-level stockpiling for putting away information.
  • NAS can utilize the Organization Document system convention.
  • A Direct Joined Stockpiling (DAS) can likewise be utilized to substitute NAS for interfacing stockpiling to an organization.
  • A NAS in an organization has an IP address related to it.


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About the Author

Sprintzeal   Aradhya Kumar 

With years of experience and a vast amount of knowledge in Project Management, Agile Management, Scrum, and other popular domains, Aradhya Kumar is well-versed in creating content for audiences from various fields and industries.

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