Systems Administrator Ii Interview Questions
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Systems Administrator Ii interview questions shared by candidates
When does DNS use TCP instead of UDP
4 Answers↳
DNS use TCP for zone transfer.
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Maximum UDP packet size is 512 bytes (or 4096, with the extension of DNS protocol). When the request is larger then a max. UDP size, DNS will switch to TCP. Less
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speed
User has lost root password, how do you reset?
4 Answers↳
Boot in single mode by typing E on the selected the kernel in grub then add S or single or 1 to the end of line eg. then B to boot the selected kernel. once in the single-user mode disable SElinux with below command eg: setenforce 0 now using passwd command "With SElinux Off as Selinux will not let you change it" eg: [root@centos images]# passwd Changing password for user root. New password: your-password BAD PASSWORD: it is based on a dictionary word BAD PASSWORD: is too simple Retype new password: your-password passwd: all authentication tokens updated successfully. Less
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Actually the easiest way to do this is to single the box in run-level 1 then use the standard passwd tools to update the hash. That's far simpler than using a live cd and editing the shadow file. This a network based kvm. is an operation that can be done at the DC or over ipmi or Less
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init 1, change root password... I missed this one.
A customer calls in saying that they're having problems sending email. They're using IIS SMTP and a web-based application to send the messages. What are 3 things which you would look for first, in the order you find most probable, in troubleshooting this issue?
2 Answers↳
1) SMTP Virtual Server configuration 2) DNS configuration 3) RBL/IP Blacklisting Less
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PDC Emulator Allows Windows Server 2003 to act as the primary domain controller. Provides replication support for the backup domain controller. Assists with time and group policy synchronization. Infrastructure Master - (One per domain) Responsible for updating the group to user references whenever there are changes. Also receives new names. Relative ID Master - RID - (One per domain) Ensures that every object created has a unique ID number. Schema Master - (One per forest) Responsible for maintaining and modifying the AD schema. Domain Naming Master - (One per forest) Responsible for adding and deleting domains in a forest. Less
Define the difference between a hub and a switch
3 Answers↳
A hub works on the physical layer (layer 1) and doesn't separate collision or broadcast domains. A switch works on the data link layer (layer 2) and separates collision domains. This allows multiple devices to talk at full duplex using one switch. A router works on the network layer (layer 3) and separates both collision domains and broadcast domains. Less
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A hub works on the physical layer, where as the switch works on the datalink layer . A Switch creates a broadcast domain for each port and allows for full duplex of data allowing you to TX and RX at the same time. A hub is a shared device, it will propagate broadcast traffic. Most are only half duplex . Less
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Network topology. haven't used since collage. Googled and found hub propogates to many servers at once (Token Ring) and Switch uses propogation to different subnets. Less
How would you handle a computer problem that you couldn't resolve?
3 Answers↳
I would use available tools: Internet, coworkers, software company. Whatever I need to do to get it resolved. Less
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If I did not know how to solve the problem, first, I would contact the IT Department (Information Technologies). If there is not an actual IT Department, I would go to the person in charge and inquire as to how to find a solution to this problem after I have researched the internet (YouTube) to see if I could still resolve this issue myself. Less
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Backup, reload.
Provide the IP address of a host that's pinging you.
2 Answers↳
netstat installation didn't have ICMP support. Use tcpdump.
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tcpdump.....
Technical questions that were on the spot for troubleshooting. This was for Windows and Linux.
1 Answers↳
Accordingly..
