System Administrator Interview Questions
1. What do you know about the active directory in the system administration?
It is the centralized control of everything that the active directory can assure. The information and settings related to the development are stored in the central database.
For example, The database might list 100 user accounts with details like each person’s job title, phone number, and password.
2. What is Group Policy
It provides a central place for administrators to manage and configure operating systems, applications, and user settings. Using it properly enables you to increase the security of users’ computers and help defend against insider and external threats.
3. Why would you not restore a DC that was last backed up eight months ago?
Look for candidates who understand that a DC is a domain controller, and that backup files should generally not be older than 180 days. Backing up a DC that is several months old could lead to inconsistent data, caused by lingering objects.
4. What's the most frustrating support issue you've been called to resolve?
A good candidate will demonstrate that they overcame their frustration and handled the situation with a professional attitude. It is important that System Administrators do not express annoyance when supporting employees who rely on them to solve a variety of technical difficulties.
3. What experience do you have with hardware components?
Only candidates with proficient experience installing and replacing hardware components should be considered, as this is an operation which will frequently be performed by the system administrator.
4. How would you take the backup of Active directory database.
Here we need to use the command line to backup the active directory.
- Step 1 – Open the command prompt by clicking on start, typing “cmd,” and then hitting the enter button.
- Step 2 – In the command prompt, type “wbadmin start systemstatebackup – backuptarget;e:” and then press the enter button.
4. What is the difference between LDAP and Active Directory?
Candidates should be able to tell you that LDAP, or Lightweight Directory Access Protocol, is a standard protocol for querying and modifying entries in a directory service. Active Directory is a directory service implemented by Microsoft, and it supports the LDAP protocol, among others.
12. What is a domain controller?
A domain controller (DC ) is a windows-based computer system that is used for storing user account data in a central database.
13. According to you, what is the difference between FAT and NTFS?
FAT:
- There is no security when the user logs in locally.
- It usually supports file names with only 8 characters and does not support file compression.
- The partition and file size can be up to 4 GB, and there is no such security permission for file and folder levels.
- It doesn’t support bad cluster mapping, so it is not very reliable.
NTFS:
- There is security for both the local and the remote users.
- It usually supports file names that have 255 characters.
- It supports file compression, and the partition size can be up to 16 exabytes.
- There is security for file and folder levels.
- It supports bad cluster mapping and transaction logging and is highly reliable.
- edb.log - Records the transaction before writing the AD database.
- res2.log - It is second temporary log file and it is used when res1 is filled.
- res1.log - It is a log file for reserve space.
- edb.chk - It is a check point file and perform transaction records checking By seeing this file it can be known when last transaction committed to AD Db.
- ntds.dit - Actual Ad database where the information is written
This error occurs when the secure channel between the affected machine and Active Directory is broken. The secure channel is the mechanism by which domain-joined machines communicate securely with domain controllers, and it relies upon the password associated with a computer account.
solution:- login in cached account which have admin rights.
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