Top 35 System Administrator Interview Questions and Answers
Top 35 System Administrator Interview Questions and Answers
Q1: What is Active Directory?
Active Directory is database service which contains all the information about object such as users, group, object, OU and computer. It enables authentication and authorization for client in a network. It’s used to manage centralized security in domain network.
Q2: Which protocol is used by Active Directory?
LDAP protocol
Q3: What is DNS?
DNS stand for Domain Name System. It is used to resolve FQDN (fully qualified domain name) to IP address and vice versa such as www.example.com to 61.95.352.76. It is use 53 port.
Q4: How many records create on DNS?
There are Six records create on DNS server:
1. A and AAAA record
2. PTR record
3. CName/ Alias record
4. SRV record
5. SOA record
6. MX record
Q5: How many zones are create?
There are three zones:
1. Primary zone
2. Second zone
3. Stub zone
Q6: What is DHCP?
DHCP stand for dynamic host configuration protocol. It is provide automatic IP address range such as subnet, gateway etc. to computer in network. It uses 67 and 68 port.
Q7: How does DHCP work?
DHCP work on DORA process:
D denote as discover DHCP
O denote as offer DHCP
R denote as request DHCP
A denote as acknowledgement
Q8: Which ports are used by DHCP?
Port 67 and 68
Q9: What is Super Scope?
A super scope is a collection of individual scope that can be managed as a single administrative unit in network.
Q10: What is different between Window server 2008 and Window server 2012?
1. Microsoft has removed dcpromo command to install Active Directory domain service from window server 2012 whereas window server 2008 is used to install.
2. Window server 2008 had release both 32bit and 64bit whereas window server 2012 completely released 64bit for better performance and scalability.
3. Window server 2012 has upgrade version IISv8 with more features whereas window server 2008 IIS version 7.
4. Window server 2012 has both interfaces core and graphic it means if want to work on core so may switch core and if want to graphics mode so may switch but in Window server 2008 have both different-different installation.
5. Microsoft has released new version of PowerShell 3 with advance feature where window server 2008 has PowerShell 2 version.
6. Hyper-v 3.0 has upgrade in Window server 2012 with some features such as virtual machine can be migrating without shared storage.
7. Window server 2012 has feature that i-pad or phone can be part of domain in network.
Q11. What is WDS?
WDS stand for Windows deployment service. It is used to install operating system through remotely in network.
Q12: How many FSMO roles?
There are five FSMO roles:
1. Schema role
2. Domain naming master role
3. Infrastructure role
4. PDC Emulator role
5. RID (relative infrastructure) role
Q13: In which file active directory database store and location?
Ntds.dit and location c:/window/ntds
Q14: What are the GPO?
Group policy object is collection of group policy security settings. Gpo affects the user and computer accounts located in sites, domain and organization Units(OU). There are two types of Group policy object local and non-local.
Q15: How to take gpo backup?
Open group policy object management > right click on group policy object > click on backup > select target (where you want to keep your backup file) > ok.
Q16: What is DFS?
Distributed File System (DFS) allows administrators to group shared folders located on different servers by transparently connecting them to one or more DFS namespaces. A DFS namespace is a virtual view of shared folders in an organization
Q17: How many types of Backup?
There are five types of Backup:
1. Normal Backup
2. Copy backup
3. Differential backup
4. Incremental backup
5. Daily backup
Q18: What is different between differential and incremental backup?
Differential Backup:
Differential backups copy those files that have been changed since the last full backup took place. So if a full backup was done on Day 1, Day 2's differential will copy all of the files that have changed since Day 1's backup copied everything. Day 3's differential backup will also copy all of the files that have changed since Day 1's full copy was made
Incremental Backup:
Incremental backups copy all of the files that have changed since the last backup was made. They do this whether the last backup was a full one or an incremental copy. So if a full backup was done on Day 1, Day 2's incremental will back up all of the files that have changed since Day 1. Likewise, Day 3's incremental backup will only copy those files that have changed since Day 2's incremental took place
Q19: What is WSUS?
Windows Server Update Services (WSUS), also called Windows Update Services (WUS), is a free add-on for managing patches and updates to the Microsoft Window operating systems.
Q20: How to take active directory backup?
1. Open up your command prompt by clicking Start and type "cmd" and hit enter.
2. In your command prompt type "wbadmin start systemstatebackup -backuptarget:e:" and press enter.
Note: You can use a different backup target of your choosing
3. Type "y" and press enter to start the backup process.
2. In your command prompt type "wbadmin start systemstatebackup -backuptarget:e:" and press enter.
Note: You can use a different backup target of your choosing
3. Type "y" and press enter to start the backup process.
Q21: How many lookup zone in DNS?
There are two lookup zone:
1. Forward lookup zone
2. Reverse lookup zone
Q22: How many partition in Active Directory?
There four partition in Active Directory:
1. Schema partition
2. Domain partition
3. Infrastructure partition
4. Application partition
Q23: What is structure of Active Directory?
There are two structure of Active Directory:
1. Logical structure: Domain and organization Units
2. Physical structure: Site, tree and forest
Q24: What is IIS?
Internet Information Server (IIS) is one of the most popular web servers from Microsoft that is used to host and provide Internet-based services to ASP.NET and ASP Web applications. A web server is responsible for providing a response to requests that come from users. When a request comes from client to server IIS takes that request from users and process it and send response back to users
Q25: What is FTP?
The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.
Q26: What is DHCP reservation?
A DHCP reservation is a permanent IP address assignment. It is a specific IP address within a DHCP scope that is permanently reserved for leased use to a specific DHCP client.
Q27: When I am accessing website so error 503 has shown service unavailable how to fix it?
Click on Start > Run > Type inetmgr > Press enter key > Expand IIS > click on application pools > Start application pool if it shows stopped > right click on application pool and click on recycle.
Q28: How to take database backup Microsoft SQL express server 2014?
Open Microsoft SQL express server 2014 > Right click on database > Click on backup > Click on browse and assign path where you have to keep backup file > ok.
Q29: How many file create in Microsoft SQL?
Microsoft SQL create two files MDF and LDF.
Q30: How can I access Microsoft SQL server through IP Address in network?
Open Microsoft SQL configuration management > Double click on Network > Enable TCP/IP service.
Q31: How many network address?
There are five network address:
Class A: 1 to 126
Class B: 128 to 191
Class C: 192 to 223
Class D: 224 to 239
Class E: 240 to 255
Q32: What is private and public ip address?
Public ip address is unique in throughout world and it is paid ip address and use for WAN environment. It provide by ISP.
Private ip address is use for LAN environment and it is free of cost.
Q33: What is range of public ip address?
Class A: 10.0.0.0 to 10.255.255.255
Class B: 172.16.0.0 to 172.31.255.255
Class C: 192.168.0.0 to 192.168.255.255
Q34: What is APIPA IP address?
When client request for automatic ip address from DHCP server and then DHCP server does not provide any IP address in that case client assign ip address 169.254.x.x itself that is APIPA IP address.
Q35: How can I set Desktop Wallpaper through group policy?
Open group policy management > create new policy assign name Desktop Wallpaper > Right click on that > select edit > Expand user configuration > Expand Administrative templates > Click on Desktop > Enable prohibited change wallpaper > Enable set Desktop Wallpaper > provide image location >press ok.
6 comments
Nice post. I was checking constantly this blog and
ReplyDeleteI'm impressed! Very useful information specifically the last part :) I care for such information much.
I was seeking this certain info for a long time.
Thank you and best of luck.
Várias das causas mais prováveis estão listadas aquém.
ReplyDeleteAlgumas das causas mas prováveis estão listadas abaixo.
ReplyDeleteMédico acha incrÃvel não apresentar perda auditiva.
ReplyDeletePoucas das causas mais prováveis estão listadas aquém.
ReplyDeleteCorrection
ReplyDeleteQ32: What is private and public ip address?
PUBLIC ip address is unique in throughout world and it is paid ip address and use for WAN environment. It provide by ISP.
PRIVATE ip address is use for LAN environment and it is free of cost.
Please leave your comments...... Thanks