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F5 Networks Software Development Engineer II Interview Questions and Answers

Updated 1 Feb 2025

F5 Networks Software Development Engineer II Interview Experiences

1 interview found

Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Jan 2025.

Round 1 - Coding Test 

One mcq two codes in total 240 min

Round 2 - Technical 

(1 Question)

  • Q1. Mostly on networking concepts
Round 3 - Technical 

(1 Question)

  • Q1. Coding question on data structures and algorithms

Interview Preparation Tips

Interview preparation tips for other job seekers - Just check in the initial state itself what tech stack they are checking out for even though I’ve checked and mentioned in my resume all the tech stack I knew they ran all the interview process in the same tech stack and then at last after three rounds came back to me and mentioned you cleared all the rounds but the issue is your tech stack and we are sorry about it.

Interview questions from similar companies

Interview Preparation Tips

Round: Test
Experience: It was a blend of topics from IT,CSE and ECE. Try to concentrate on coding and networks for this round. mostly luck based

Round: Group Discussion
Experience: A very easy round. Can easily clear it if you have minimum skills

Round: Technical Interview
Experience: needs a sound knowledge in networking .

Round: HR Interview
Experience: your personality and the way you behave matters a lot. Try to be humble and truthful

General Tips: as I mentioned earlier keep trying never loose hope
Skills: communication skills, grasping power , knowledge
College Name: VIT VELLORE
Motivation: high package :P
Funny Moments: none . but had to go to bangalore for interview which was fun :)

I applied via Campus Placement and was interviewed in Jan 2016. There were 3 interview rounds.

Interview Preparation Tips

Round: Test
Experience: Tested basics in each subject

Round: Technical Interview
Experience: Had asked me about my projects in detail. Some DSA questions were asked. Asked to code in C for some questions.

Round: Technical Interview
Experience: Asked questions about data structures and some more algorithms. Tested in Probability and some quant.

College Name: IIT Madras

Interview Questionnaire 

6 Questions

  • Q1. Tell us about yourself ?
  • Q2. Any knowledge of Networks/DS?
  • Ans. 

    Yes

    • Knowledge of network protocols and architectures

    • Understanding of data structures and algorithms

    • Experience with network troubleshooting and analysis

    • Familiarity with network security and encryption

    • Proficiency in network programming and socket programming

  • Answered by AI
  • Q3. Which projects do you like the most?
  • Q4. How was your test ?
  • Ans. 

    The test went well, I was able to complete all the tasks within the given time frame.

    • I prepared well for the test by reviewing relevant materials

    • I managed my time effectively during the test

    • I was able to solve all the problems and complete all the tasks

    • I double-checked my work to ensure accuracy

  • Answered by AI
  • Q5. Why CISCO ? Tell something about it
  • Q6. Which companies have you applied for till day 4 ?

Interview Preparation Tips

Round: Test
Experience: 30 questions on Technical knowledge - Basic C, DS, Microprocessor, OS, Networks, Circuit Designs.
20 questions on Aptitude.
Total Questions: 50

Round: Technical Interview
Experience: It was a 25-30 minute round. Apart from the questions mentioned, they asked questions related to BTP(Signal Processing) and Microprocessor 8085.
Tips: Basic C, EE 370 and Microprocessor 8085 will be helpful. They will look for Networks related questions. Revise the related courses and attend PPTs.

Round: HR Interview
Experience: It was a 15-minute round.

General Tips: Analytical thinking is important and you should have good technical knowledge and a decent academic record.
College Name: IIT KANPUR

Skills evaluated in this interview

Interview Preparation Tips

Round: Resume Shortlist
Tips: It will be good to have a GPA of 8 and above

Round: Test
Experience: Questions were easy it were good at C and basic maths. Questions were distributed on all aspects of computer science such as Operating Systems, Few Output Question, Data Structures and Application layer networking . In basic aptitude most questions fall under Probability, distance and time and few others.
Duration: 60 minutes
Total Questions: 50

Skills: Communication, Basic Coding, Math Puzzle
College Name: NIT Surathkal

Interview Preparation Tips

Round: Test
Experience: The test was MCQ type. It comprised of questions from Operating Systems, Data Structures, Microprocessors, logical Reasoning, Aptitude and Computer Networks. No negative marking was there.
Tips: One needs to be fast as you can't spend much time on one question.
Duration: 60 minutes
Total Questions: 50

Round: Technical Interview
Experience: I was given 2 coding questions to solve and basics of oops, operating systems, data structures and networks were asked. 3-4 questions were asked in each topic mentions above. The interviewer also asked 2 puzzles which were the standard ones. He first asked me if I knew the topic or not, then only he asked me questions about it. But that doesn't mean that you can skip all the above mentions topics.
Tips: Be relaxed and confident and try to discuss your approach with the interviewer.

Round: Technical Interview
Experience: 2 Coding questions and 3-4 questions from operating systems and networks.Questions also from the mentioned projects.

Round: HR Interview
Experience: Standard HR interview with questions like what Cisco does and why they should hire you. He also asked me questions from the CV.

Tips: Be confident and mug up your cv well

Round: HR Interview
Experience: It was just a formality where he just asked about my background and whether I would be able to move to bangalore and Why I want to join Cisco.

Skills: Confidence, Problem Solving Skills, Operating System Basics, Coding Skills, Object Oriented Programming (OOP) Basics, Computer Networking, Data Strrutures
College Name: IIT Guwahati

I applied via Referral

Interview Questionnaire 

10 Questions

  • Q1. Program to print the elements of a binary tree in spiral order
  • Ans. 

    Program to print binary tree elements in spiral order

    • Use two stacks to keep track of nodes at odd and even levels

    • Push nodes from left to right in odd level stack and right to left in even level stack

    • Pop nodes from the stack alternatively and print them

    • Repeat until both stacks are empty

  • Answered by AI
  • Q2. Explain what happens underneath when you enter a URL in the browser
  • Ans. 

    Entering a URL in the browser triggers a series of events to retrieve and display the requested webpage.

    • The browser checks the cache for a previously stored copy of the webpage

    • If not found, the browser sends a request to the DNS server to resolve the domain name to an IP address

    • The browser then sends a request to the web server at the IP address for the webpage

    • The web server responds with the requested webpage

    • The brows...

  • Answered by AI
  • Q3. Explain why MAC addresses are required despite having IP addresses
  • Ans. 

    MAC addresses are required for identifying devices on a local network, while IP addresses are used for identifying devices on a global network.

    • MAC addresses are used for communication within a local network

    • IP addresses are used for communication across different networks

    • MAC addresses are assigned by the manufacturer and cannot be changed

    • IP addresses can be assigned dynamically or statically

    • MAC addresses are used in the...

  • Answered by AI
  • Q4. Solve the classical bridge and torch puzzle
  • Q5. Explain my internship project
  • Ans. 

    Developed a web application for tracking inventory and sales data

    • Used React.js for front-end development

    • Implemented RESTful APIs using Node.js and Express for back-end

    • Utilized MongoDB for database management

    • Integrated authentication and authorization features for secure access

    • Designed user-friendly interface with responsive design

  • Answered by AI
  • Q6. What is an arraylist in Java?
  • Ans. 

    An ArrayList is a dynamic array in Java that can grow or shrink in size during runtime.

    • ArrayList is a class in Java's Collection framework.

    • It implements the List interface and allows duplicate elements.

    • Elements can be added or removed using methods like add(), remove(), etc.

    • It can also be sorted using the sort() method.

    • Example: ArrayList names = new ArrayList<>();

    • names.add("John"); names.add("Mary"); names.remove(0);

Answered by AI
  • Q7. What is the difference between an arraylist and a linkedlist in Java?
  • Ans. 

    ArrayList is a resizable array while LinkedList is a doubly linked list.

    • ArrayList is faster for accessing elements while LinkedList is faster for adding or removing elements.

    • ArrayList uses contiguous memory while LinkedList uses non-contiguous memory.

    • ArrayList is better for random access while LinkedList is better for sequential access.

    • Example: ArrayList - List names = new ArrayList<>(); LinkedList - List names = new L

  • Answered by AI
  • Q8. “Java is not a pure OO language”. Justify (the answer expected was that the primitive types are not objects in Java!)
  • Ans. 

    Java is not a pure OO language due to primitive types not being objects.

    • Primitive types like int, boolean, etc. are not objects in Java

    • They do not have methods or inheritance like objects do

    • This violates the principle of everything being an object in pure OO languages

    • Wrapper classes like Integer, Boolean, etc. were introduced to provide object-like behavior for primitives

  • Answered by AI
  • Q9. What is the difference between an object oriented and object based language?
  • Ans. 

    Object-oriented languages support inheritance and polymorphism, while object-based languages do not.

    • Object-oriented languages allow for the creation of classes and objects, and support inheritance and polymorphism.

    • Object-based languages only support objects, but do not have the concept of classes or inheritance.

    • Examples of object-oriented languages include Java, C++, and Python, while JavaScript is an example of an obj

  • Answered by AI
  • Q10. Explain inheritance and abstraction with a concrete example
  • Ans. 

    Inheritance is a way to create new classes based on existing ones. Abstraction is a way to hide implementation details.

    • Inheritance allows a subclass to inherit properties and methods from a superclass.

    • Abstraction allows a class to provide a simplified interface to its users while hiding its implementation details.

    • For example, a Car class can inherit properties and methods from a Vehicle class, while also implementing i...

  • Answered by AI

    Interview Preparation Tips

    Skills:
    College Name: NA

    Skills evaluated in this interview

    I applied via Referral

    Interview Questionnaire 

    14 Questions

    • Q1. How many interviews have I attended before?
    • Q2. What value would I add to Cisco?
    • Q3. What do I know about Cisco?
    • Q4. Am I ready to work as an IT manager?
    • Ans. 

      No, as a software engineer, you may not have the necessary experience or skills to work as an IT manager.

      • Software engineers typically focus on coding and technical aspects, while IT managers are responsible for overseeing projects, teams, and budgets.

      • IT managers need strong leadership, communication, and decision-making skills, which may not be the primary focus of a software engineer.

      • Consider gaining experience in pro...

    • Answered by AI
    • Q5. Mention the layers in OSI stack
    • Ans. 

      OSI stack has 7 layers that define how data is transmitted over a network.

      • OSI stands for Open Systems Interconnection

      • Each layer has a specific function and communicates with adjacent layers

      • Layers are: Physical, Data Link, Network, Transport, Session, Presentation, Application

    • Answered by AI
    • Q6. When would I go for a router to make two computers communicate?
    • Ans. 

      A router is needed to connect two computers in different networks or to share internet connection.

      • When two computers are in different networks, a router is needed to connect them.

      • A router can also be used to share internet connection between multiple devices.

      • Routers can provide additional security features like firewall and VPN.

      • Examples of routers include Cisco, Netgear, and TP-Link.

    • Answered by AI
    • Q7. Mention the number of bits in IPv4 and IPv6 addresses
    • Ans. 

      IPv4 has 32 bits and IPv6 has 128 bits.

      • IPv4 addresses are in the format of xxx.xxx.xxx.xxx where each xxx is an 8-bit number.

      • IPv6 addresses are in the format of xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx where each xxxx is a 16-bit number.

      • IPv6 addresses allow for a much larger number of unique addresses than IPv4.

    • Answered by AI
    • Q8. What is the need for IPv6?
    • Ans. 

      IPv6 is needed due to the exhaustion of IPv4 addresses and the need for more unique IP addresses.

      • IPv6 provides a significantly larger address space compared to IPv4.

      • It allows for the allocation of unique IP addresses to every device connected to the internet.

      • IPv6 supports improved security features and better network performance.

      • It enables the growth of Internet of Things (IoT) devices and services.

      • Transitioning to IPv...

    • Answered by AI
    • Q9. How many clients are possible for a /24 address?. What is the network address and broadcast address here?
    • Ans. 

      A /24 address can have 256 clients. Network address is the first IP and broadcast address is the last IP.

      • A /24 address has 256 IP addresses

      • The network address is the first IP in the range

      • The broadcast address is the last IP in the range

    • Answered by AI
    • Q10. What is the difference between anycast, unicast, and multicast?
    • Ans. 

      Anycast, unicast, and multicast are different ways of routing network traffic.

      • Unicast is one-to-one communication between a sender and a receiver.

      • Anycast is one-to-nearest communication where the sender sends a message to the nearest receiver.

      • Multicast is one-to-many communication where the sender sends a message to a group of receivers.

      • Anycast is used for load balancing and finding the nearest server.

      • Unicast is used f...

    • Answered by AI
    • Q11. What is virtual memory? What is its size in relation to main memory?
    • Ans. 

      Virtual memory is a memory management technique that allows a computer to use more memory than physically available.

      • Virtual memory is created by using hard disk space as an extension of RAM.

      • It allows running more programs than the physical memory can handle.

      • The size of virtual memory is typically larger than the size of main memory.

      • Virtual memory is divided into pages, which are swapped in and out of main memory as nee...

    • Answered by AI
    • Q12. How do I rate myself in C, web technologies on a scale of 10?
    • Ans. 

      I rate myself 8 in C and 7 in web technologies.

      • I have extensive experience in C programming and have worked on multiple projects using it.

      • In web technologies, I have a good understanding of HTML, CSS, and JavaScript, but there is always room for improvement.

      • I am constantly learning and improving my skills in both areas.

    • Answered by AI
    • Q13. What are my strengths?
    • Ans. 

      My strengths include problem-solving skills, attention to detail, and strong programming abilities.

      • Strong problem-solving skills - able to analyze complex problems and come up with effective solutions

      • Attention to detail - meticulous in writing code and ensuring it is error-free

      • Strong programming abilities - proficient in multiple programming languages such as Java, Python, and C++

    • Answered by AI
    • Q14. The classical 3l, 5l puzzle

    Interview Preparation Tips

    Skills:
    College Name: NA

    Skills evaluated in this interview

    I applied via Referral

    Interview Questionnaire 

    15 Questions

    • Q1. Program to swap kth and kth to last element of a singly linked list in one pass. You are not given the length of the linked list before hand
    • Ans. 

      Swap kth and kth to last element of a singly linked list in one pass without knowing the length of the list.

      • Traverse the linked list using two pointers, one starting from the head and the other starting from kth node.

      • When the second pointer reaches the end of the list, the first pointer will be pointing to the kth to last node.

      • Swap the values of kth and kth to last node.

      • Handle edge cases such as k being out of bounds o...

    • Answered by AI
    • Q2. Program to reverse the ordering of words in a sentence
    • Ans. 

      Program to reverse the ordering of words in a sentence

      • Split the sentence into an array of words

      • Reverse the array

      • Join the array into a sentence

    • Answered by AI
    • Q3. Program to find the intersection point of two singly linked lists in O(n)
    • Ans. 

      Program to find intersection point of two singly linked lists in O(n)

      • Traverse both lists and find their lengths

      • Move the head of the longer list by the difference in lengths

      • Traverse both lists in parallel until intersection point is found

      • Return the intersection point

    • Answered by AI
    • Q4. Program to reverse a singly linked list both recursively and iteratively
    • Ans. 

      Program to reverse a singly linked list both recursively and iteratively

      • Iteratively: Use three pointers to reverse the links between nodes

      • Recursively: Use a recursive function to reverse the links between nodes

      • In both approaches, update the head and tail pointers accordingly

    • Answered by AI
    • Q5. There are 12 balls which are identical in size and appearance but one is an odd weight (could be light or heavy). Find it in minimum number of weighings using a balance
    • Ans. 

      Find odd weight ball among 12 identical balls using a balance in minimum weighings.

      • Divide balls into 3 groups of 4 each

      • Weigh any 2 groups against each other

      • If both groups weigh the same, the odd ball is in the third group

      • If one group is heavier, weigh any 2 balls from that group against each other

      • If they weigh the same, the odd ball is the remaining one

      • If one ball is heavier, it is the odd ball

      • Repeat the process with t

    • Answered by AI
    • Q6. Program to reverse a singly linked list in groups of k recursively
    • Ans. 

      A program to reverse a singly linked list in groups of k using recursion.

      • Create a recursive function that takes the head of the linked list and the group size as parameters.

      • If the remaining list has less than k nodes, return the head as it is.

      • Reverse the first k nodes by recursively calling the function for the next group.

      • Connect the reversed group to the remaining list.

      • Return the new head of the reversed list.

    • Answered by AI
    • Q7. Program to find the length of the longest substring without repeating characters in a string
    • Ans. 

      Program to find length of longest substring without repeating characters in a string.

      • Use a sliding window approach to traverse the string

      • Use a hash set to keep track of unique characters in the current substring

      • Update the length of longest substring without repeating characters as you traverse the string

    • Answered by AI
    • Q8. You are given two cubes. Represent the date of a month (01 ­ 31) using both the cubes by placing numbers on the given cubes
    • Ans. 

      Representing date of a month using two cubes with numbers 0-9 on each face

      • Assign numbers 0-9 on each face of both cubes

      • Use one cube to represent tens digit and other for ones digit

      • Rotate cubes to display desired date

      • Example: Cube 1 - 0, 1, 2, 3, 4, 5; Cube 2 - 0, 1, 2, 6, 7, 8; To represent 23, Cube 1 shows 2 and Cube 2 shows 3

    • Answered by AI
    • Q9. Given an array containing repeated characters, find the character repeated most number of times
    • Ans. 

      Find the character repeated most number of times in an array of strings.

      • Create a dictionary to store character count

      • Iterate through each string and character

      • Return the character with highest count

    • Answered by AI
    • Q10. Trace the output of a C/C++ code snippet containing extensive pointers and references
    • Ans. 

      Answering a question on tracing output of C/C++ code snippet with pointers and references

      • Understand the code and identify all pointers and references

      • Trace the values of each pointer and reference at each step

      • Follow the flow of the code to determine the final output

    • Answered by AI
    • Q11. Explain segmentation fault
    • Ans. 

      Segmentation fault is a type of error that occurs when a program tries to access a memory location that it is not allowed to access.

      • Segmentation fault is also known as a segfault.

      • It is a common error in C and C++ programming languages.

      • It occurs when a program tries to read or write to a memory location that it does not have permission to access.

      • This can happen when a program tries to access an uninitialized pointer or ...

    • Answered by AI
    • Q12. Explain BFS and DFS
    • Ans. 

      BFS and DFS are graph traversal algorithms used to search for nodes in a graph.

      • BFS stands for Breadth First Search and explores all the nodes at the current depth before moving to the next level.

      • DFS stands for Depth First Search and explores as far as possible along each branch before backtracking.

      • BFS uses a queue data structure while DFS uses a stack or recursion.

      • BFS is useful for finding the shortest path in an unwei...

    • Answered by AI
    • Q13. 4. Which traversal would I prefer for finding a cycle in a graph?
    • Ans. 

      I would prefer Depth First Search (DFS) traversal for finding a cycle in a graph.

      • DFS is better suited for finding cycles in a graph as it explores deeper into the graph before backtracking.

      • DFS can detect a cycle in a graph in O(V+E) time complexity.

      • DFS can be implemented using recursion or a stack.

      • Breadth First Search (BFS) can also be used to find cycles but it is less efficient than DFS.

      • In DFS, we can keep track of v

    • Answered by AI
    • Q14. Explain time and space complexities of hashmap
    • Ans. 

      Hashmap has constant time complexity for insertion, deletion, and retrieval, but requires additional space.

      • Hashmap provides constant time complexity O(1) for insertion, deletion, and retrieval operations on average.

      • The space complexity of a hashmap is proportional to the number of elements stored in it.

      • Hashmap uses a hash function to map keys to indices in an underlying array, which allows for efficient lookup.

      • In case ...

    • Answered by AI
    • Q15. Design the underlying data structure behind a login page
    • Ans. 

      The data structure behind a login page should store user credentials securely.

      • Use a database to store user information

      • Hash and salt passwords for security

      • Include fields for username, email, password, and possibly additional information

      • Consider implementing two-factor authentication

    • Answered by AI

    Interview Preparation Tips

    Skills:
    College Name: NA

    Skills evaluated in this interview

    Interview Preparation Tips

    General Tips: Just be confident. You may not be able to answer all the questions correctly. If you don't know the answer&#44; be honest and confidently answer the questions that you know.
    College Name: NIT SURATHKAL

    F5 Networks Interview FAQs

    How many rounds are there in F5 Networks Software Development Engineer II interview?
    F5 Networks interview process usually has 3 rounds. The most common rounds in the F5 Networks interview process are Technical and Coding Test.
    How to prepare for F5 Networks Software Development Engineer II interview?
    Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at F5 Networks. The most common topics and skills that interviewers at F5 Networks expect are Coding, HTML, SQL, Customer Service and Javascript.
    What are the top questions asked in F5 Networks Software Development Engineer II interview?

    Some of the top questions asked at the F5 Networks Software Development Engineer II interview -

    1. Coding question on data structures and algorit...read more
    2. Mostly on networking conce...read more

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    F5 Networks Software Development Engineer II Salary
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    ₹14.5 L/yr - ₹27 L/yr
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