Angel One SDE (Software Development Engineer) Interview Questions and Answers for Experienced

Q1. It was an MCQ Round and the questions were a mixture of CS fundamentals topics.
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This round contained 2 coding questions.

Q1. This was a one on one coding round where I was asked 3 questions that were of Easy to Medium level of LeetCode.
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Q1. HR round was more of a technical interview round where I was asked about my android projects and some core android topics since both me and my interviewer were Android Developers.
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3 coding question 1 SQL query

Q1. Question about tree check tree is bst or not ?write code on it
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Q2. Array question find 1st repeated element in o(n).
Ans. 
Find the first repeated element in an array of strings in O(n) time complexity.
• Create a hash table to store the frequency of each element.

• Traverse the array and check if the element is already present in the hash table.

• If it is present, return the element as the first repeated element.

• If no element is repeated, return null or -1.

• Example: ['apple', 'banana', 'orange', 'apple'] => 'apple'
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Q1. Multiple of big integers and find complexity
Ans. 
Question about finding complexity of multiplying big integers.
• Big integers require more memory and processing power than regular integers.

• Multiplying two n-digit integers takes O(n^2) time using the standard algorithm.

• There are faster algorithms like Karatsuba and FFT which have lower complexity.

• The complexity of multiplying two n-digit integers using Karatsuba algorithm is O(n^log2(3)).

• The complexity of multiplying tw...read more
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Q1. Where do you see yourself in 5 years?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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15 MCQs and 2 coding questions were given. MCQs include questions from topics like dbms, system design, oops etc.
1st coding question was of dp and 2nd was of a good question of graph.

Q1. Create a linked list from scratch and then delete a given node. Then print the linked list.
Ans. 
Create and delete a node in a linked list and print the updated list.
• Create a Node class with data and next pointer attributes

• Create a LinkedList class with head attribute and methods to add, delete and print nodes

• To delete a node, traverse the list and update the next pointer of the previous node to skip the node to be deleted

• Print the list by traversing and printing the data of each node
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Q2. Reverse first K(given) characters of string.
Ans. 
Reverse the first K characters of a given string.
• Take the first K characters of the string.

• Reverse the selected substring.

• Concatenate the reversed substring with the rest of the original string.
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Mcqs based on cs fundamentals and 2_3 coding questions

Q1. 2-3 DSA questions to be written on paper in the interview itself
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Q2. Merge 2 sorted Linked list into 1
Ans. 
Merge two sorted linked lists into one.
• Create a new linked list to store the merged list.

• Compare the values of the nodes from both lists and add the smaller value to the new list.

• Move the pointer of the list with the smaller value to the next node.

• Repeat the comparison and addition until one of the lists is empty.

• Add the remaining nodes from the non-empty list to the new list.

• Return the new merged list.
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Q1. A full cv analysis interview round discussion on all the projects and team work experience
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Quantitative aptitude, verbal ability, critical reasoning

Q1. SQL: find store with highest AOV
Ans. 
Use SQL query to find store with highest Average Order Value (AOV).
• Use GROUP BY clause to group by store

• Calculate AOV by dividing total revenue by total orders

• Use ORDER BY and LIMIT to find store with highest AOV
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Q2. Generic behavioural questions
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General SQL Question

Q1. General puzzle questions from GFG
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Q2. Normal interview level SQL Question
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Q1. There were lot of behavioral questions
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Q2. Then there were few questions related to how to navigate through the data
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It was good. Mostly questions on spark

Q1. About current role
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Q2. Roles and responsibilities
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Q1. Inndepth about skill
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Q2. What is your hands on experience
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