10+ Junior System Administrator Interview Questions and Answers

To check slowness on a workstation, I would perform various diagnostic tests and optimizations.

• Check CPU and memory usage using Task Manager or Resource Monitor

• Scan for malware and viruses using antivirus software

• Check for disk fragmentation and optimize disk usage

• Update operating system and drivers to the latest versions

• Disable unnecessary startup programs and services

• Check network connectivity and speed

Yes, I have experience in SCCM and Windows OS migration.

• I have worked with SCCM to deploy software updates and patches.

• I have also used SCCM to deploy new operating systems to computers.

• I am familiar with the process of creating and deploying task sequences for OS migration.

• I have experience with Windows 7 to Windows 10 migration.

• I have also worked on Windows Server migration using SCCM.

• I am comfortable with troubleshooting issues related to SCCM and OS migration.

PST and OST files are data files used by Microsoft Outlook for storing emails, contacts, and calendar items.

• PST files are used for storing emails and data locally on a computer.

• OST files are used for offline access to emails when connected to an Exchange server.

• PST files can be imported/exported easily, while OST files sync with the server.

• Example: A PST file might be created for archiving old emails, while an OST file allows access to current emails without internet.

The OSI model has 7 layers that standardize network communication protocols.

• 1. Physical Layer: Deals with the physical connection (e.g., cables, switches).

• 2. Data Link Layer: Manages node-to-node data transfer (e.g., Ethernet).

• 3. Network Layer: Handles routing of data packets (e.g., IP).

• 4. Transport Layer: Ensures reliable data transfer (e.g., TCP, UDP).

• 5. Session Layer: Manages sessions between applications (e.g., API calls).

• 6. Presentation Layer: Translates data formats (e....read more

Configuring a DVR involves setting up hardware, connecting to a network, and configuring recording settings.

• 1. Connect the DVR to a power source and TV using HDMI or RCA cables.

• 2. Connect the DVR to the internet via Ethernet or Wi-Fi for remote access.

• 3. Access the DVR's settings menu using the remote control.

• 4. Configure recording settings, such as schedule and resolution.

• 5. Set up user accounts for remote viewing on mobile devices or computers.

Switch forwards data to specific devices based on MAC addresses, hub broadcasts data to all devices, router connects different networks.

• Switch operates at layer 2 of the OSI model, hub operates at layer 1, and router operates at layer 3.

• Switch forwards data only to the intended device based on MAC addresses, while hub broadcasts data to all connected devices.

• Router connects different networks and routes data between them based on IP addresses.

• Switches are more efficient than ...read more

CCTV systems involve cameras, recording devices, and monitors for surveillance and security operations.

• Cameras capture video footage, which can be analog or digital.

• DVR/NVR devices store recorded footage; DVR for analog, NVR for IP cameras.

• Monitors display live feeds or recorded footage for real-time surveillance.

• Cabling connects cameras to recording devices; coaxial for analog, Ethernet for IP.

• Remote access allows users to view footage via the internet or mobile apps.

EC2 is a web service that provides resizable compute capacity in the cloud.

• EC2 stands for Elastic Compute Cloud.

• It allows users to rent virtual servers on which they can run their own applications.

• EC2 instances can be easily scaled up or down based on demand.

• Users have full control over their instances, including the choice of operating system, networking, and security settings.

• EC2 provides a wide range of instance types optimized for different use cases, such as general-purp...read more

DORA process stands for Discovery, Optimization, Remediation, and Automation in IT operations.

• Discovery involves identifying the current state of IT systems and processes.

• Optimization focuses on improving efficiency and performance.

• Remediation addresses any issues or problems found during the discovery phase.

• Automation aims to automate repetitive tasks to streamline operations.

• Example: Using DORA process to enhance network monitoring and troubleshooting.

405 error means method not allowed.

• 405 error occurs when the requested method is not allowed for the specified resource.

• It is typically returned when trying to use a method (such as POST or PUT) that is not supported by the server for the requested URL.

• For example, trying to POST data to a URL that only allows GET requests would result in a 405 error.

The OSI model is a conceptual framework used to understand network communication in seven layers.

• Layer 1: Physical - Deals with the physical connection (e.g., cables, switches).

• Layer 2: Data Link - Manages node-to-node data transfer (e.g., Ethernet).

• Layer 3: Network - Handles routing of data (e.g., IP addresses).

• Layer 4: Transport - Ensures complete data transfer (e.g., TCP, UDP).

• Layer 5: Session - Manages sessions between applications (e.g., API calls).

• Layer 6: Presentation ...read more

The routing process determines the best path for data packets to travel across networks.

• Routing involves analyzing the destination IP address of a packet.

• Routers use routing tables to decide the best path for data.

• Dynamic routing protocols (e.g., OSPF, BGP) adjust routes based on network changes.

• Static routes can be manually configured for specific paths.

• Example: A packet destined for 192.168.1.1 is routed through the most efficient path based on the routing table.