Fintek Software Services Java Software Developer Interview Questions and Answers

Q1. Explain the projects you have worked on
Ans. 
I have worked on various projects including a web application for a retail company, a mobile app for a fitness tracker, and a data analysis tool for a marketing agency.
• Developed a web application for a retail company to manage inventory and sales

• Created a mobile app for a fitness tracker to track workouts and progress

• Built a data analysis tool for a marketing agency to analyze customer behavior and campaign effectivene
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Q2. Authentication mechanism of the project
Ans. 
The project uses JSON Web Tokens (JWT) for authentication.
• JWT is used to securely transmit information between parties as a JSON object.

• JWTs are signed using a secret (with HMAC algorithm) or a public/private key pair (using RSA or ECDSA).

• JWTs consist of three parts: header, payload, and signature.

• Example: Upon successful login, a JWT is generated and sent to the client for subsequent API requests.
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General Topic And controversial topic

Q1. Number series in python
Ans. 
Number series in python involves generating a sequence of numbers based on a specific pattern or rule.
• Use loops or list comprehensions to generate number series.

• Identify the pattern or rule to determine the next number in the series.

• Examples: Fibonacci series, prime numbers series, arithmetic progression.
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Q2. Basic python questions and patterns
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Very difficult aptitude questions

Resources coding round

Q1. Very difficult questions
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Q2. Coding program is very difficult
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A paper based test and it was technical

Q1. About the projects
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Q2. Some sql questions
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Basic Apti questions, Logic Questions, Puzzle Questions

Q1. Sorting Techniques
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Q2. Number Pattern Printing Question
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Q3. Linked List Implementation
Ans. 
Linked list is a data structure where each element points to the next element in the sequence.
• Nodes contain data and a reference to the next node

• Insertion and deletion can be done efficiently

• Traversal starts from the head node
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Q4. Diff btw 32 bit and 64 bit OS
Ans. 
32-bit OS can only address up to 4GB of RAM, while 64-bit OS can address much more.
• 32-bit OS can only address up to 4GB of RAM, while 64-bit OS can address much more

• 64-bit OS allows for larger file sizes and better performance

• 64-bit OS is more secure due to enhanced security features

• 64-bit OS is required to run certain modern software and games
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Q5. Puzzle of 3 jar
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Q6. Reverse a String
Ans. 
Reverse a given string
• Use a loop to iterate through the characters of the string

• Append each character to a new string in reverse order

• Return the reversed string
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Normal apti questions.

Q1. About you experience in previous organization.
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