China Railway Construction Corporation Interview Questions and Answers

Q1. Do you have any experience working in data center
Ans. 
Yes, I have 5 years of experience working in data centers.
• Managed server hardware installations and upgrades

• Performed routine maintenance tasks such as cabling and rack mounting

• Troubleshooted network and server issues

• Implemented disaster recovery plans

• Monitored and optimized data center performance
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Q2. What’s component inside of server
Ans. 
Components inside a server include CPU, RAM, hard drives, power supply, motherboard, and network interface cards.
• CPU (Central Processing Unit) - processes instructions and performs calculations

• RAM (Random Access Memory) - stores data and instructions that the CPU needs

• Hard drives - store data and programs long-term

• Power supply - provides electricity to the server components

• Motherboard - connects all the components toge...read more
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Q3. What’s should you do before turn off server?
Ans. 
Before turning off a server, it is important to properly shut down all running applications and services to prevent data loss or corruption.
• Save any work in progress and close all applications

• Ensure all services are stopped gracefully

• Check for any pending updates or patches

• Backup important data if necessary

• Notify users or stakeholders about the planned shutdown

• Document the shutdown process for future reference
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Q4. Tell me different type of optical cables
Ans. 
Different types of optical cables include single-mode fiber, multi-mode fiber, and plastic optical fiber.
• Single-mode fiber: used for long-distance communication, has a small core size and transmits infrared laser light.

• Multi-mode fiber: used for shorter distances, has a larger core size and transmits infrared LED light.

• Plastic optical fiber: used for short-distance applications like home networks, made of plastic inste
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Q1. Process of troubleshooting network issue
Ans. 
Troubleshooting network issues involves identifying the problem, gathering information, isolating the cause, and implementing a solution.
• Identify the problem by gathering information from users and monitoring tools

• Isolate the cause by checking network configurations, hardware, and software

• Implement a solution by making necessary changes and testing the network

• Document the troubleshooting process for future reference
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Q2. What tools do you use to check optical fiber
Ans. 
I use tools like optical power meters, visual fault locators, and OTDRs to check optical fiber.
• Optical power meters measure the power level of the optical signal.

• Visual fault locators help identify breaks or bends in the fiber.

• OTDRs (Optical Time Domain Reflectometers) analyze the quality of the fiber by sending pulses of light and measuring reflections.
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MCQ's and speech assesment,DSA ,C,Git,Dbms, everything was included and last part u will be able to choose language of your choice i chose java

Q1. For core Java if u have to develop a music app for ex Spotify which concepts can be implemented in java .
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Q2. AWS,cloud computing autoscaling ,IAM etc
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Q1. Question about applications and possibilities.
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Q2. Questions about frameworks.
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Q3. Questions about past projects
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Two LLM based application development

Q1. Whats LEL tell procedures
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Q2. Tel us the control of confind
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