ZeroFOX HSE Advisor Interview Questions and Answers

Basic coding questions were there related to string operations

Q1. Technical questions were asked related to networking
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Q2. What is tls handshake
Ans. 
TLS handshake is the process of establishing a secure connection between a client and a server.
• TLS handshake is initiated by the client and involves a series of steps to negotiate encryption parameters and exchange cryptographic keys.

• It ensures the authenticity, integrity, and confidentiality of data transmitted over the network.

• The handshake includes the ClientHello, ServerHello, Certificate Exchange, Key Exchange, an...read more
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Q3. What happens when you hit some url in browser
Ans. 
When you hit a URL in a browser, a request is sent to the server and the server responds with the requested webpage.
• Typically, the browser sends an HTTP GET request to the server.

• The server processes the request and generates a response.

• The response may include HTML, CSS, JavaScript, and other resources needed to render the webpage.

• The browser receives the response and renders the webpage for the user to view and inter...read more
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Q4. What are different protocols you have worked on
Ans. 
I have worked on various protocols including HTTP, TCP/IP, and MQTT.
• HTTP (Hypertext Transfer Protocol) - used for communication between web browsers and servers

• TCP/IP (Transmission Control Protocol/Internet Protocol) - the foundation of the internet

• MQTT (Message Queuing Telemetry Transport) - a lightweight messaging protocol for IoT devices
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Q1. Data structure algorithm questions related to various scenarios
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Q2. DS Algo related questions which revolved around different scenarios
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Q1. Networking questions... Tcp handshake, osi layers, SSL etc
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Q1. Automation questions.. what you worked in previous projects
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Q1. Director round with normal questions
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Q1. Managerial round with basic managerial questions
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Q1. Salary discussion ... Basically they will not agree to what you demand
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Q1. Vp round with generel questions
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Difficult to answer some of DSP concepts

Should be able to answer all embedded RTOS concepts

Pretty easy just same basic aptitude and output based questions in C/C++ language

Q1. Leetcode medium questions
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Q2. Project discussions
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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

Generic dotnet questions mcq

Q1. .net, c# , sql , async questions
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One problem is given need to make logic and your current project details

Managerial round was taken at the end