Ekart Logistics Senior Systems Engineer Interview Questions and Answers

4 questions, duration:-1:30 , platform:-hackerearth

Q1. How to manage and configure postfix mail server.
Ans. 
Postfix mail server can be managed and configured using configuration files and command line tools.
• Edit the main configuration file /etc/postfix/main.cf to make changes to the server settings

• Use postconf command to view or change configuration parameters

• Restart the postfix service after making changes for them to take effect

• Utilize tools like postmap to manage lookup tables for postfix

• Monitor mail server logs for troub
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Q2. OS go to maintenance mode, how to fix it.
Ans. 
To fix an OS in maintenance mode, reboot the system, check for any recent changes or updates, run diagnostics, and restore from a backup if necessary.
• Reboot the system to see if it resolves the issue

• Check for any recent changes or updates that may have caused the OS to go into maintenance mode

• Run diagnostics to identify any hardware or software issues

• Restore the OS from a backup if needed
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Q1. What is the difference between L2 and L3 switch
Ans. 
L2 switches operate at the data link layer and make forwarding decisions based on MAC addresses, while L3 switches operate at the network layer and make forwarding decisions based on IP addresses.
• L2 switches operate at the data link layer of the OSI model

• L2 switches make forwarding decisions based on MAC addresses

• L3 switches operate at the network layer of the OSI model

• L3 switches make forwarding decisions based on IP ...read more
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Q2. Wh lan is faster and wifi?
Ans. 
Wired LAN is faster than WiFi.
• Wired LAN typically offers faster and more stable connection speeds compared to WiFi.

• WiFi speeds can be affected by interference, distance from the router, and the number of devices connected.

• Examples of wired LAN technologies include Ethernet and Powerline adapters.
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Q1. What do we do if scope are full on DHCP server
Ans. 
If scope are full on DHCP server, you can either expand the scope or delete inactive leases to make room for new ones.
• Expand the scope by increasing the range of IP addresses available for lease

• Delete inactive leases to free up space for new leases

• Check for any misconfigured devices causing IP address conflicts
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Q1. 1.Java8 and multithreading concepts. 2.Microservices architecutre . 3.Angular lifecycle hooks.
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Q2. Microservice architecture level
Ans. 
Microservice architecture is an architectural style that structures an application as a collection of loosely coupled services.
• Microservices are small, independent, and autonomous services that communicate with each other through APIs.

• Each microservice is responsible for a specific business capability and can be developed, deployed, and scaled independently.

• Microservices promote flexibility, scalability, and fault tole...read more
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Q3. Good answer for interview of java
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Q1. Microservices architecutre
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Q2. Microservices architecutre Angular
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Q1. What is proxy server?
Ans. 
A proxy server acts as an intermediary between clients and servers, forwarding requests and responses.
• Proxy server acts as a middleman between clients and servers

• It forwards client requests to the appropriate server

• It caches data to improve performance

• It can be used for filtering and blocking certain content

• Examples: Squid, Nginx, Apache HTTP Server
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Q2. What is Dns? What is DHCP? Which port is useing smtp?
Ans. 
DNS is a system that translates domain names into IP addresses. DHCP is a protocol that assigns IP addresses to devices on a network. SMTP uses port 25.
• DNS stands for Domain Name System

• It translates domain names (e.g., www.example.com) into IP addresses (e.g., 192.168.1.1)

• DHCP stands for Dynamic Host Configuration Protocol

• It automatically assigns IP addresses to devices on a network

• SMTP stands for Simple Mail Transfer ...read more
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Q3. What is vpn? Which port use for DNS service?
Ans. 
VPN stands for Virtual Private Network. It provides a secure and encrypted connection over a public network.
• VPN allows users to access a private network remotely.

• It creates a secure tunnel between the user's device and the network.

• VPN masks the user's IP address and encrypts the data transmitted.

• It is commonly used for remote work, accessing geo-restricted content, and enhancing online privacy.

• Examples of VPN protocols
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Q4. Define colour stright through cable? If os corrupt. How it is resolved?
Ans. 
A color straight through cable is a type of Ethernet cable used to connect devices in a network.
• A color straight through cable is also known as a patch cable or a straight-through cable.

• It is used to connect devices such as computers, switches, and routers in a network.

• The cable has the same pin configuration on both ends, allowing for direct device-to-device connections.

• The color coding of the cable follows the T568A ...read more
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Q1. Basic technical question
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Q2. Basic Server and basic security related question.
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