Infosys Consulting System Analyst Interview Questions and Answers

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. Even and odd number index
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Q1. 1. ISO27001, Risk Assement , Audit and PCIDSS, CIA and Cyber security? 2.What is Control Testing?
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Q2. Risk Treatment, Risk Register
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Aptitude test with quant and reasoning and basic English objective type questions

Basic programs on data structure, loops exception handling, API

Q1. General discussion on projects you worked on. Might ask you to explain solution of a given problem. Will also evaluate you on your communication skills
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Q2. Given a production issue , How will you act to the situation
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Q1. Data analyst does
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Q2. Data cleaning means
Ans. 
Data cleaning is the process of identifying and correcting errors or inconsistencies in data to improve its quality.
• Removing duplicate entries

• Correcting spelling errors

• Handling missing values

• Standardizing data formats

• Identifying and removing outliers
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Q1. What difference do you bring
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Q1. What is AD ,Tell me about iso layers,what is tcp/ip.
Ans. 
AD is Active Directory, a directory service developed by Microsoft. ISO layers refer to the OSI model, and TCP/IP is a protocol suite.
• Active Directory is a directory service used to manage resources in a network.

• ISO layers refer to the Open Systems Interconnection model, which is a conceptual model used to describe network communication.

• TCP/IP is a protocol suite used for communication between devices on a network.

• TCP/...read more
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Q1. Salary discussion,joining avail and previous emp details
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