Palo Alto Networks Technical Lead Interview Questions and Answers

Good, questions related to regex

General questions about resume and projects

Basics of C, pointer arithmetic, some output prediction mainly focused on pre and post increment operators, write code to print the character with most occurance in a string with count.

Q1. Data structures and algorithms, files, sockets, synchronous/asynchronous operations, multithreading concepts, synchronization primitives, memory management, VoIP basics, SIP callflow, SIP registration, sub...read more
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2 hours DSA questions

Q1. How to check a number is power of 2
Ans. 
To check if a number is a power of 2, we can use bitwise operations.
• A power of 2 has only one bit set to 1, so we can use the bitwise AND operator to check if the number is a power of 2.

• If n is a power of 2, then n & (n-1) will be 0.

• For example, 8 (1000 in binary) is a power of 2, and 8 & 7 (0111 in binary) is 0.
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Q2. Sort a stack without using another data structure
Ans. 
Sort a stack without using another data structure
• Use recursion to pop the top element and insert it at the bottom of the remaining stack

• Repeat until the stack is sorted in ascending order

• Time complexity: O(n^2), space complexity: O(n) due to recursion
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Q3. Check weather array have continuous increasing than decreasing value
Ans. 
Check if array has continuous increasing and decreasing values
• Loop through the array and check if each element is greater than the previous one

• Once you find the maximum element, check if the remaining elements are in decreasing order

• If yes, return true else false
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Q1. Design a cricinfo (LLD)
Ans. 
Design a cricinfo (LLD)
• Identify the entities: players, teams, matches, scorecards, tournaments, etc.

• Define the relationships between entities

• Create a database schema to store the data

• Implement APIs to fetch and update data

• Design a UI to display the information

• Consider scalability and performance

• Ensure data security and privacy
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Q1. Share details of your previous job.
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Q2. Why should we hire you?
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Q3. What are your strengths and weaknesses?
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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.

One hour Leet code medium question

Q1. Golang related questions and Question on projects done.
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