System Administrator Interview Questions and Answers

System Administrator Interview Questions and Answers

A system administrator or systems administrator or sysadmin is primarily responsible for setting up and monitoring the operations and maintenance of an office’s computer systems. Especially multi-user computers, such as servers. The SA seeks to ensure that the uptime, performance, resources, and security of the computers he or she manages meet the needs of the users, without exceeding a set budget when doing so. System administrators perform more of the day-to-day different tasks related to maintaining the critical business data that resides on the mainframe, while the system programmer focuses on maintaining the system itself.

Other administrator services are:

Database administrator: A database administrator (DBA) maintains a database system and is responsible for the integrity of the data and the efficiency and performance of the system.

Network administrator: A network administrator maintains network infrastructure such as switches and routers, and diagnoses problems with these or with the behavior of network-attached computers.

Security administrator: A security administrator is a specialist in computer and network security, including the administration of security devices such as firewalls, as well as consulting on general security measures.

Web administrator: A web administrator maintains web server services (such as Apache or IIS) that allow for internal or external access to web sites. Tasks include managing multiple sites, administering security, and configuring necessary components and software. Responsibilities may also include software change management.

Computer operator: A computer operator performs routine maintenance and upkeep, such as changing backup tapes or replacing failed drives in a redundant array of independent disks (RAID). Such tasks usually require physical presence in the room with the computer, and while less skilled than sysadmin tasks, may require a similar level of trust, since the operator has access to possibly sensitive data.

Systems analyst: A systems analyst documents, trouble shoots, and develops existing and new computer and work processes and systems. (Wikiversity)

The main responsibilities of system administrator are:

  • Installing and updating system software and checking software
  • OS upgrades and configuration changes
  • Preventing the spread of viruses and malicious programs and solve the errors
  • Allocating mass storage space
  • Reviewing system logs
  • Responsibility for System security management and for documenting the configuration of the system
  • Active Directory management (adding and configuring new workstations and setting up user accounts to provide authorizations)
  • Performing backups of data and creating recovery policy
  • Performance monitoring and optimization
  • Keeping the network up and running.
  • User training and management
  • High-level technical knowledge and technical support experience
  • Answering technical queries.

What is system administrator?

What are the personal characteristics of a system administrator?

What is difference between FAT and NTFS?

What is the Domain and Domain Tree and Forests in Active Directory?

What is VPN?

What are the pros or cons of using DHCP?

What is DHCPinform?

What is a DNS?

What is a DNS Leak?

What is Proxy Server?

Where is a Proxy server used?

What are the different types of Proxy Server?

What difference can we find in the usage of CSVDE vs LDIFDE?

What is VOIP?

What is APIPA?

What is RFC 1518?

What is malware?

What is a Spyware?

What is Dos Attack?

What is DDoS Attack?

What is Tor (The Onion Router)?

What are symptoms of DDoS attacks?

What SATA?

What is PATA or IDE?

What is a WINS?

What is MBR?

What is Exploit kit?

What is Bit Locker?

What is loop back?

What is LDAP?

What is KCC?

What is the ISTG? Who has that role by default?

When do we use WDS?

What is Semaphore?

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