AT&T Intern Interview Questions and Answers

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?
Ans. 
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
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English communication test

Q1. Tell me about yourself
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Q2. Why do you want to join this company
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Q1. OSI model, netwroking concepts
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The 1st round is a written test. The written test consists of some Aptitude questions,technical and 2 coding questions.

Q1. What is Stack? What are the applications of Stack? Fibonacci Series code.
Ans. 
A stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle.
• Applications include function call stack, undo-redo operations, infix to postfix conversion, and backtracking algorithms.

• Push and pop operations are used to add and remove elements from the stack, respectively.

• Fibonacci series can be implemented using a stack or recursion.

• Stacks can be implemented using arrays or linked lists.
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Q2. Toughest challenges that you have faced in your life? How did u overcome it?
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Q1. OS based question
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Q2. Data Structure based question
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Q1. Basic Background Information
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