Fortanix Software Developer Trainee Interview Questions and Answers

Basic coding questions

Q1. Core subjects like Operating System, Networking
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Q2. TCP, UDP protocols, working
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Q3. OSI, TC/IP working model
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Mcqs + 2 coding questions fairly easy one

Q1. Implement something which you donot know by researching
Ans. 
Implementing a neural network for image recognition
• Research different types of neural networks such as Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs)

• Study how to preprocess image data and feed it into the neural network

• Learn about popular deep learning frameworks like TensorFlow or PyTorch

• Experiment with training a neural network on a dataset like MNIST for digit recognition
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Q1. Traversing the web pages which has links to other web pages in specific orders
Ans. 
Traversing web pages with links in specific orders requires web scraping and following the links recursively.
• Use web scraping tools like BeautifulSoup or Scrapy to extract links from web pages.

• Implement a recursive function to follow the links in specific orders (e.g. depth-first or breadth-first).

• Track visited pages to avoid infinite loops or revisiting the same pages.

• Handle errors and exceptions when accessing web pa
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Q2. Heap implementation
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Easy to medium leetcode

Q1. Core fundamentals
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Q2. Networking, operating System
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Q1. Networking protocols
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Q2. Like UDP AND TCP TRAFFIC FLOW
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Q1. Salary discussion
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Q1. Question on OOPS, c++
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Q2. Questions on resume
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It includes two DSA questions and some aptitude questions

Q1. Introduce yourself
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Q2. Give the maximum element at any point of time for after pop and push
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Q3. Reverse a string
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Q1. Introduce yourself
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Q2. Get the maximum at any point during push and pop operation in stack
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Round duration - 45 minutes
Round difficulty - Medium

Timing was 12 PM. Interviewer was nice.

Q1. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. 
Reverse a given string containing alphabets, numbers, and special characters.
• Iterate through the string from end to start and append each character to a new string.

• Alternatively, use built-in functions like reverse() or slicing to reverse the string.

• Handle special characters and numbers while reversing the string.

• Ensure to consider the constraints on the length of the string and number of test cases.
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Q2. 
Move Zeros to Left Problem Statement
Your task is to rearrange a given array ARR such that all zero elements appear at the beginning, followed by non-zero elements, while maintaining the relative order of...read more
Ans. 
Rearrange an array such that all zero elements appear at the beginning, followed by non-zero elements, maintaining relative order of non-zero elements.
• Iterate through the array and maintain two pointers - one for the next position to place a zero and one for the next non-zero element.

• Swap the elements at these pointers until all zeros are moved to the left and non-zero elements are in their relative order.

• Time complexi...read more
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Q3. Write an SQL query to find the second highest salary from a table.
Ans. 
SQL query to find the second highest salary from a table
• Use the MAX() function to find the highest salary

• Use the NOT IN operator to exclude the highest salary from the results

• Order the salaries in descending order and limit the result to 1
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Round duration - 60 Minutes
Round difficulty - Medium

Online test

Q1. MCQ Questions
Based on c++,c and java basics
Ans. 
MCQ questions based on C++, C, and Java basics.
• Understand the differences between C++, C, and Java syntax and features.

• Be familiar with basic concepts like data types, control structures, and functions.

• Practice solving MCQs to improve your understanding of the languages.
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Round duration - 150 Minutes
Round difficulty - Medium

Technical interview

Q1. 
Distinct Elements in K-Sized Windows
The task is to determine the number of distinct elements in every sliding window of size 'K' across an array 'ARR' of size 'N'. A 'K' sized window is a contiguous sequ...read more
Ans. 
Calculate the count of distinct elements in each sliding window of size 'K' across an array 'ARR'.
• Use a sliding window approach to iterate through the array and keep track of distinct elements using a hashmap or set.

• Update the count of distinct elements in each window as it slides across the array.

• Return the array detailing the count of distinct elements in each 'K' sized window for each test case.
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Q2. 
MergeSort Linked List Problem Statement
You are given a Singly Linked List of integers. Your task is to sort the list using the 'Merge Sort' algorithm.
Input:
The input consists of a single line contain...read more
Ans. 
Sort a Singly Linked List using Merge Sort algorithm.
• Implement the Merge Sort algorithm for linked lists.

• Divide the list into two halves, sort each half recursively, and then merge them.

• Use a fast and slow pointer to find the middle of the list for splitting.

• Handle the base cases of empty list or single node list.

• Example: Input: 4 3 2 1 -1, Output: 1 2 3 4
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Round duration - 20 minutes
Round difficulty - Hard

Hr interview