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Datacultr Software Developer Interview Questions and Answers
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Interview questions from similar companies
Software Developer Interview Questions & Answers
CapitalOne
VINAY KUMAR REDDY C
posted on 30 Aug 2016
I applied via Campus Placement
Interview Questionnaire
1 Question
- Q1. Task Scheduling
Interview Preparation Tips
Experience: Questions are very basic and easy to answer .Algorithms should be implemented on spot but they are also standard ones
Tips: read Richie and kernigan
Duration: 60 minutes
Round: Technical Interview
Experience: Nice question and very hard to solve .Though it is a standard problem but requires spontaneous thinking because there are some restrictions for it
Tips: Read cormen
General Tips: Learn all basic algorithms and be confident.
Skill Tips: Solve some puzzles
Skills: Problem Solving Skills, Approaching A Problem
Duration: 2
College Name: IIT Madras
Motivation: i like data engineering profile
I appeared for an interview in Jan 2025.
Test was based on arrays and some dsa concepts.
Software Engineer Interview Questions & Answers
OneCard
Kishan KAVATHIYA (Kishu)
posted on 15 May 2024
I applied via LinkedIn and was interviewed in Apr 2024. There was 1 interview round.
(1 Question)
- Q1. Internal Implementation of HashMap
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed before Mar 2023. There were 2 interview rounds.
(1 Question)
- Q1. What is Java String pool?
(1 Question)
- Q1. Did you have any conflicts with your peers and have did you handle it?
Skills evaluated in this interview
(1 Question)
- Q1. System design question normal
Coding question of moderate difficulty
(1 Question)
- Q1. They asked Java coding question
Selected
I applied via Company Website and was interviewed in Jul 2024. There were 2 interview rounds.
There was a hacker rank assignment
Leetcode style question, medium
Senior Software Developer Interview Questions & Answers
Airpay Payment Services
Anonymous
posted on 14 Apr 2024
Selected
I applied via Naukri.com and was interviewed in Mar 2024. There were 3 interview rounds.
Technical Aptitude on singalton pattern
(3 Questions)
- Q1. What is man in middle attack?
- Ans.
A man-in-the-middle attack is a cyber security attack where the attacker secretly intercepts and possibly alters the communication between two parties.
Attacker intercepts communication between two parties
Attacker may alter the communication
Commonly occurs in public Wi-Fi networks
Can lead to data theft or unauthorized access
- Q2. How to protect api?
- Ans.
Protecting API involves using authentication, authorization, encryption, rate limiting, and monitoring.
Implement authentication mechanisms such as OAuth, JWT, or API keys
Use authorization to control access to different parts of the API
Encrypt sensitive data using SSL/TLS
Implement rate limiting to prevent abuse and protect against DDoS attacks
Monitor API traffic for unusual activity and potential security threats
- Q3. Whats is csrf ?
- Ans.
CSRF stands for Cross-Site Request Forgery, a type of attack where a malicious website tricks a user into performing actions on another website without their knowledge.
CSRF attacks exploit the trust that a site has in a user's browser, by sending unauthorized requests using the user's session.
Prevent CSRF attacks by using tokens in forms, checking the origin of requests, and implementing proper authentication and autho...
(2 Questions)
- Q1. Why you want ti join airpay?
- Q2. Why you leave current organisation?
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Aug 2024. There was 1 interview round.
DSA leetcode on hackerrank
Senior Software Developer Interview Questions & Answers
MAYBRIGHT VENTURES PRIVATE LIMITED, Kolkata
Anonymous
posted on 11 Oct 2021
I applied via Naukri.com and was interviewed in Sep 2021. There were 3 interview rounds.
Interview Questionnaire
8 Questions
- Q1. Coding Assessment to Create Rest API.
- Ans.
Create a Rest API for coding assessment
Choose a programming language and framework
Define endpoints and HTTP methods
Implement CRUD operations
Use authentication and authorization
Test API using tools like Postman
- Q2. About JWT Token
- Q3. Pagination how will you do for 3 lakh record
- Ans.
Pagination can be achieved by limiting the number of records displayed per page and using page numbers.
Limit the number of records displayed per page to improve performance
Use page numbers to navigate through the records
Implement caching to reduce database queries
Consider using lazy loading to improve performance
Use a server-side framework that supports pagination
Consider using a search feature to filter records
- Q4. Query Optimization
- Q5. Mysql difference between having and where clause
- Ans.
HAVING is used to filter results after grouping, WHERE is used to filter results before grouping.
HAVING is used with GROUP BY clause, WHERE is used with SELECT clause
HAVING filters groups based on aggregate functions, WHERE filters rows based on column values
HAVING is slower than WHERE as it operates on grouped data
Example: SELECT department, COUNT(*) FROM employees GROUP BY department HAVING COUNT(*) > 5;
Example: SELE...
- Q6. Mysql index - query to write index
- Ans.
Creating an index in MySQL improves query performance by allowing faster data retrieval.
Use the CREATE INDEX statement to create an index. Example: CREATE INDEX idx_name ON table_name(column_name);
Indexes can be unique, ensuring no duplicate values. Example: CREATE UNIQUE INDEX idx_unique ON table_name(column_name);
Composite indexes can be created on multiple columns. Example: CREATE INDEX idx_composite ON table_name(c...
- Q7. Polymorphisim interface
- Ans.
Polymorphism in interfaces allows objects to be treated as instances of their parent type, enhancing flexibility and code reusability.
Polymorphism enables methods to do different things based on the object it is acting upon.
Example: An interface 'Animal' with a method 'makeSound()'. Classes 'Dog' and 'Cat' implement this interface with different sounds.
It promotes code reusability and cleaner code by allowing the same ...
- Q8. Clustered index and non clustered index
Interview Preparation Tips
First Round Technical Discussion. Second Round is Technical Discussion and coding assessment.
Third Round will be business logical assessment.
Skills evaluated in this interview
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