Deven Infotech Software Developer Interview Questions and Answers

3 coding problems
1 aptitude
1 puzzle
3 hrs duration

Q1. Sorting algorithms
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Q2. 1 puzzle - burning candles
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Q1. General discussion on resume
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Q2. Few reasoning questions
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Q1. About company work culture
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Q1. Given strings and asked to write down the first non-repeatable string
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Q2. Palindrome program in java
Ans. 
A palindrome program in Java checks if a given string reads the same forwards and backwards.
• Create a function that takes a string input

• Use a loop to compare characters from both ends of the string

• Return true if the string is a palindrome, false otherwise
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Q3. Diamond problem in java
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Diamond problem in Java occurs when a class inherits from two classes that have a common ancestor, resulting in ambiguity.
• Diamond problem arises in multiple inheritance scenarios in Java.

• It occurs when a class inherits from two classes that have a common ancestor.

• To resolve the diamond problem, Java does not support multiple inheritance through classes, but it can be achieved using interfaces.

• Example: Class A and Class...read more
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Q4. Given a list of numbers and insisted to get the sum of numbers which gives 6
Ans. 
Iterate through the list and find pairs of numbers that sum up to 6
• Iterate through the list and check if the current number + any other number in the list equals 6

• Store the pairs of numbers that sum up to 6 in a separate list

• Return the list of pairs
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Q1. Java based questions
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Q1. Every single oops concepts
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Q2. Every sql questions possiible
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Q1. I attended only technical not yet results announced
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Q2. I attended only technical not yet result announced
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SQL , CODING QUESTION PYTHON

Q1. BASIC SQL QUESTIOS
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Q2. OOPS 4 PILLARS INHERITANCE ETC
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Q1. TELL ME ABOUT YOURSELF
Ans. 
I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Strong problem-solving skills

• Experience working in Agile development environment

• Familiarity with version control systems like Git

• Passionate about learning new technologies
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Q2. WHAT DO YOU KNOW ABOUT YOUR COMPANY
Ans. 
Company is a leading software development firm specializing in creating innovative solutions for various industries.
• Company has a strong reputation for delivering high-quality software products

• Specializes in creating custom solutions for clients in different industries

• Known for innovative and cutting-edge technology solutions

• Has a diverse portfolio of successful projects

• Company values teamwork and collaboration in thei
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Q1. Difference between linked list and array list
Ans. 
Linked list is a data structure where elements are stored in nodes with pointers to the next node. Array list is a dynamic array that can grow or shrink in size.
• Linked list allows for efficient insertion and deletion of elements anywhere in the list.

• Array list provides fast access to elements using index, but slower insertion and deletion compared to linked list.

• Example: Linked list - 1 -> 2 -> 3 -> 4 -> 5, Array list
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Q2. Difference between @controller and @ Rest controller
Ans. 
The @Controller annotation is used for traditional MVC controllers, while @RestController is used for RESTful web services.
• The @Controller annotation is used to define a class as a Spring MVC controller, which can handle HTTP requests and return a view.

• The @RestController annotation is used to define a class as a controller for RESTful web services, which can handle HTTP requests and return data in JSON or XML format.

• T...read more
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Q1. What is OOPS ?
Ans. 
OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain data and methods to manipulate that data.

• It allows for encapsulation, inheritance, and polymorphism.

• Examples of OOPS languages include Java, C++, and Python.
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Q2. What is Dependency Injection
Ans. 
Dependency Injection is a design pattern where components are given their dependencies rather than creating them internally.
• Allows for easier testing by mocking dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Example: Constructor injection, Setter injection
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Q1. Which Architechture does you project build by?
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Q2. What is Normalization in sql?
Ans. 
Normalization in SQL is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a table into smaller tables and defining relationships between them.

• It helps in reducing data redundancy by storing data in a structured manner.

• There are different normal forms like 1NF, 2NF, 3NF, and BCNF that define the level of normalization.

• Example: If we have a t...read more
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Q1. Tell about your self ?
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Q2. Whom do you provide your first month salary ?
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