Bharat Sanchar Nigam Intern Interview Questions and Answers

Q1. Use of Hash Table
Ans. 
Hash tables are data structures that store key-value pairs for efficient retrieval.
• Hash tables use a hash function to map keys to indexes in an array.

• They have constant time complexity for insertion, deletion, and lookup operations.

• Collisions can occur when multiple keys hash to the same index, which can be resolved using techniques like chaining or open addressing.
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Q1. It was a online coding round with one question related to a medium hard binary search question..
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Q2. The second question was bit ambiguous question involving a tree, where we were asked to add a tree child and subchild in the form a a directory and subdirectory
Ans. 
Adding a tree child and subchild resembles creating directories and subdirectories in a file system.
• A tree structure consists of nodes, where each node can have multiple children.

• To add a child, create a new node and link it to the parent node.

• For example, if 'Folder A' is a parent, 'Folder B' can be a child of 'Folder A'.

• To add a subchild, link a new node to the child node, e.g., 'File 1' as a subchild of 'Folder B'.

• T...read more
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Q1. Tell me about yourself
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I'm a passionate student eager to learn and contribute, with a background in project management and a love for technology.
• Currently pursuing a degree in Computer Science, focusing on software development.

• Completed an internship at XYZ Corp, where I assisted in developing a mobile app.

• Active member of the university coding club, participating in hackathons and workshops.

• Volunteered at a local non-profit, helping to stre...read more
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Q2. Why do you want to join this company
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As per JD, i was being offered for a security Intern role and for this job description we have following in aptitude test:
20 questions in Problem Solving assesment and included topics were : Profit and Loss, HCM and LCM, simple interest, compound interest, Number system, Time & Work, Time, speed & distance, Ratio Analysis, Set theory, Profit & Loss, Percentages and Algebra.

30 questions from Technical topics like programming, coding, security and DBMS and oops.

And 10 questions from English Proficiency and communication .

There were 2 questions from security and management and questions were related to brute force, CTF and sort of simple concepts in LINUX.

Q1. 1. Tell me something about yourself.
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Q2. 2. Why do you think that this job role suites you most.
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Q3. 3. What does CIA stand for in cyber security?
Ans. 
CIA stands for Confidentiality, Integrity, and Availability in cyber security.
• Confidentiality refers to protecting sensitive information from unauthorized access.

• Integrity ensures that data remains accurate, complete, and unaltered.

• Availability ensures that systems and data are accessible and usable when needed.

• These three principles form the foundation of a secure cyber environment.

• Example: Encrypting data to maintain...read more
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Q4. How do you find out whether a system is compromised or vulnerable?
Ans. 
To determine if a system is compromised or vulnerable, conduct regular vulnerability scans and penetration testing.
• Perform regular vulnerability scans using tools like Nessus or OpenVAS

• Conduct penetration testing to simulate attacks and identify vulnerabilities

• Monitor system logs for suspicious activity

• Stay up-to-date with security patches and updates

• Use intrusion detection and prevention systems

• Perform code reviews an...read more
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Q5. What is penetration testing?
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Penetration testing is a simulated cyber attack on a computer system to identify vulnerabilities and assess security measures.
• It involves attempting to exploit weaknesses in a system's defenses

• The goal is to identify potential security risks and provide recommendations for improvement

• Penetration testing can be done manually or with automated tools

• Examples of penetration testing include network penetration testing, web ...read more
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Q6. Name some standard tools used in assessing the security of a system.
Ans. 
Standard tools for assessing system security
• Vulnerability scanners (e.g. Nessus, OpenVAS)

• Penetration testing tools (e.g. Metasploit, Nmap)

• Network analyzers (e.g. Wireshark, tcpdump)

• Log analysis tools (e.g. Splunk, ELK Stack)

• Firewall and intrusion detection systems (e.g. Snort, Suricata)
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Q7. What is your strength and weakness.
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Q8. And Atlast, What is your project and what was your contribution and how did you manage in project work and explanation of technology used in project.
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Q1. Tell me about yourself.
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Q2. Why do you want to work for our company?
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Q3. What are your greatest strengths and weaknesses?
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Q4. Why are you looking for a change?
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Q5. Tell me about the gap in your resume during 12th and college admission.
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Q6. How would you rate yourself on a scale of 1 to 10?
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Reasoning in Aptitude

Q1. What is Computer Networks
Ans. 
Computer Networks are systems of interconnected computers that communicate with each other to share resources and information.
• Computer networks allow for sharing of resources such as files, printers, and internet connections.

• They enable communication between devices through protocols like TCP/IP.

• Examples include LANs (Local Area Networks), WANs (Wide Area Networks), and the Internet.
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Q2. What is VPN, how it works
Ans. 
VPN stands for Virtual Private Network, it allows users to securely access a private network over a public network.
• VPN encrypts data to ensure secure transmission over the internet

• It masks the user's IP address to maintain anonymity

• VPN creates a secure tunnel between the user's device and the private network

• Common uses include remote access to company networks and bypassing geo-restrictions

• Examples of VPN services incl...read more
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