HSBC Group Software Developer Trainee Interview Questions and Answers

DP graphs strings it was good

Q1. Reverse a linkded list
Ans. 
Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, previous, and next

• Iterate through the list, updating pointers to reverse the direction

• Return the new head of the reversed list
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Q2. Print fibonacci series
Ans. 
The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
• Start with two variables initialized to 0 and 1

• Loop through desired number of iterations, adding the previous two numbers to get the next number

• Print or store each number in the series
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Q1. Can you provide an overview of your background and experiences?
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Quants, DSA, Logical, Analytical, OS, DBMS

Q1. Please introduce yourself
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Q2. Why UBS and what excited you
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Q1. Java 8 features and benefits
Ans. 
Java 8 introduced new features like lambda expressions, streams, and default methods, improving code readability and performance.
• Lambda expressions allow for more concise code and easier parallel programming.

• Streams provide a way to work with collections in a functional style, enabling easier processing of large data sets.

• Default methods allow interfaces to have method implementations, reducing the need for abstract cl...read more
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The coding test comprised 4 questions, held on the Hackerank platform. The time-bound was 90 minutes. I would rate the questions as easy, medium, medium, and hard. You had to solve at least 3 and 80% of the test cases of the last question to qualify for the last round.

Q1. Polymorphism and types of polymorphism.
Ans. 
Polymorphism is the ability of an object to take on many forms. Types include compile-time, runtime, and ad-hoc polymorphism.
• Compile-time polymorphism is achieved through function overloading and templates.

• Runtime polymorphism is achieved through inheritance and virtual functions.

• Ad-hoc polymorphism is achieved through operator overloading and function templates.

• Polymorphism allows for code reusability and flexibility ...read more
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Q2. Relational databases to which I said I had no idea.
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Q3. Binary tree traversal quesiton.
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Q4. Doubly linked list traversal question.
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Q5. Asked about projects.
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Q1. Buy and sell stocks 1
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Q2. Buy and sell stocks 2.
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Q3. An easy puzzle in which the interviewer tries to trick me with my answer. Be confident.
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Q1. String hashing problem, which I solved with KMP using O(n3) solution.
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Q2. Contributions to open source communities.
Ans. 
Contributed to open source communities by developing and maintaining projects.
• Developed and maintained a Python package for data analysis and visualization

• Contributed to a popular JavaScript library by fixing bugs and adding new features

• Participated in open source hackathons and contributed to various projects

• Provided support and guidance to new contributors in the community
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Q3. JEE Mains rank, KVPY rank.
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