Palo Alto Networks GL Accountant Interview Questions and Answers

Online test was hackerrank was was og avg difficulty

Q1. Second round was of 1 hr of which 30 mins divided into understanding my current project architecture. And second half was on what i worked and how I worked and what skills I have
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Assignment was straightforward which could be done using trie. Did it in 1/6th throughout time for given queries then mentioned allowed still no reply. Keep on asking engineering manager and hr to which they replied not upto the mark.

Coding string related programming

Hacker rank data structure linked list

Q1. System design high level
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Hacker rank data structure trees

Was asked to understand a project in python and translate it to NodeJS. This had to be done during the interview with you explaining you thought process through every step.

Q1. Reverse linked list using the recursion
Ans. 
Reverse a linked list using recursion
• Create a recursive function that takes the head of the linked list as input

• Base case: if the head is null or the next node is null, return the head

• Recursively call the function with the next node as input

• Set the next node's next pointer to the current node

• Set the current node's next pointer to null

• Return the new head of the reversed linked list
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Q2. Find max number in the linked list using stack.
Ans. 
To find max number in linked list using stack.
• Create an empty stack.

• Traverse the linked list and push each element onto the stack.

• Pop elements from the stack and compare with max value.

• Return the max value.
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Q1. Explain 3G call flow
Ans. 
3G call flow involves multiple steps including network registration, call setup, and data transfer.
• User equipment (UE) registers with the network by sending a Location Update Request.

• Network authenticates the UE and assigns it a temporary identity.

• UE initiates a call by sending a Setup Request to the network, which then establishes a connection with the called party.

• Data transfer occurs between the two parties over the...read more
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Q2. Explain 23 to 3G handover
Ans. 
23 to 3G handover is a process where a mobile device switches from a 2G network to a 3G network for better data speeds and coverage.
• Handover process involves the mobile device connecting to a new network while maintaining the ongoing call or data session.

• The switch from 2G to 3G network is triggered based on factors like signal strength, network congestion, and data speed requirements.

• During handover, the mobile device...read more
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Q1. Networking related questions
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Q1. Location & compensation related
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Q1. Make Kanbon board in react live coding
Ans. 
Create a Kanban board in React during live coding interview
• Use React components to represent different sections of the Kanban board (e.g. To Do, In Progress, Done)

• Implement drag and drop functionality for moving tasks between sections

• Utilize state management (e.g. useState) to track the tasks and their statuses

• Style the board using CSS or a UI library like Material-UI
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Q2. Write unit testing for the same
Ans. 
Unit testing is a software testing method where individual units or components of a software are tested in isolation.
• Identify the unit to be tested

• Write test cases to cover different scenarios

• Use testing frameworks like JUnit or NUnit

• Mock external dependencies for isolated testing
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Two problems, one easy and another medium level.

Q1. One linked list Problem
Ans. 
Reverse a linked list
• Iterate through the linked list and reverse the pointers

• Use three pointers to keep track of current, previous, and next nodes

• Update the pointers accordingly to reverse the list
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Q2. Questions on project and solutions we porvided
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Q1. About the current project
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Q2. Some behavioural questions
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2 coding questions in c/c++, 1 hr 30 mins - no. of deletions/additions needed to make 1 string equal to another. 2. print frequency of each number in array