Citicorp Technology Analyst Interview Questions and Answers

Q1. Equals and hashcode implementation
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Q2. Config server configuration steps
Ans. 
Config server configuration steps
• Install and set up the config server software

• Configure the server with the necessary properties and settings

• Define the repository for storing configuration files

• Create and manage configuration files

• Ensure proper security measures are in place

• Test and validate the configuration

• Monitor and maintain the config server
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Q3. Patch mapping in spring rest
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Patch mapping in Spring REST is used to partially update resources.
• Patch mapping allows clients to send only the fields that need to be updated instead of sending the entire resource.

• It is useful when updating large resources or when clients have limited bandwidth.

• Spring provides the @PatchMapping annotation to handle patch requests.

• The @PatchMapping annotation can be used with a specific URL or with a wildcard URL pat...read more
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Q1. SQL concepts related questions
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Q1. Mid level SQL related questions
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Q1. Why do you want to join JPMC
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Round duration - 90 Minutes
Round difficulty - Medium

The round was conducted early in the morning.There were 3 sections:
1.Aptitude based on Maths and Logic
2.Questions based of core subjects and basic Data Structures
3.Coding Round -2 questions

Q1. 
Minimum Number of Vertices to Reach All Nodes Problem Statement
In a directed acyclic graph with 'N' nodes, given a matrix 'edges' of size M x 2 representing 'M' edges where each edge is directed from nod...read more
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Q2. 
Box Stacking Problem Statement
Consider you are provided with 'n' different types of rectangular 3D boxes. For each type of box, you have three separate arrays: height, width, and length that define the d...read more
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Round duration - 90 Minutes
Round difficulty - Medium

A face to face interview was scheduled with the interviewer.I was asked to solve a few coding questions and then asked questions based on OS and OOPS and some questions related to the working of my projects.

Q1. 
Sort 0 and 1 Problem Statement
Given an integer array ARR of size N containing only integers 0 and 1, implement a function to sort this array. The solution should scan the array only once without using an...read more
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Q2. 
Flatten a Multilevel Sorted Linked List
You are given a linked list with 'N' nodes, where each node contains two pointers: one is 'NEXT' pointing to the next node in the list, and the other is 'CHILD', po...read more
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Round duration - 40 Minutes
Round difficulty - Easy

I was asked basic HR questions and some questions based on my resume.
 

Q1. Interview questions were based on basic computer knowledge
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Q2. Basic computer questions
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Q3. Basic computer knowledge
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Q1. During the hackathon, I was asked about what I felt about the team dynamics and what strategies I would take to ensure everyone arrives at consensus to work together.
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Q1. I was asked to explain a college project and was asked follow on questions on the same
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Q2. Questions on linked lists, algorithm to identify 2nd, 3rd connections on a site like LinkedIn. I was asked some other data structure questions that I don't recollect as this interview took place years ago
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Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions on DSA and OOPS.

Q1. What is an AVL Tree?
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Q2. Why is the time complexity of Binary Search O(Log n)?
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Q3. 
Implementing a Priority Queue Using Heap
Ninja has been tasked with implementing a priority queue using a heap data structure. However, he is currently busy preparing for a tournament and has requested yo...read more
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Q4. 
Sum of Digits Problem Statement
Given an integer 'N', continue summing its digits until the result is a single-digit number. Your task is to determine the final value of 'N' after applying this operation ...read more
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Q5. What is the difference between HashMap and HashSet?
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Q6. What is the difference between an abstract class and an interface in Object-Oriented Programming?
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Q7. Why are virtual destructors needed?
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Round duration - 60 minutes
Round difficulty - Medium

This was a technical round with questions on OS and OOPS. A design question was also discussed.

Q1. What is the Round Robin Algorithm?
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Q2. How would you design a system where users can subscribe to specific topics, and receive messages whenever a new message is posted related to those topics?
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Q3. How is memory allocation handled in recursion?
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Q4. Why are threads needed?
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Round duration - 45 minutes
Round difficulty - Easy

This was a group activity round.

Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.