Decimal Point Analytics Software Developer Interview Questions and Answers

Q1. Valid parentheses
Add your answer
Q2. Currying with arrow function
Ans. 
Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.
• Currying can be achieved using arrow functions in JavaScript.

• Arrow functions automatically bind 'this' and do not have their own 'this' value.

• Example: const add = a => b => a + b;

• Example: const addFive = add(5); const result = addFive(3); // result
Answered by AI
Add your answer

Q1. DFS related problem
Add your answer
Q2. Machine coding round
Add your answer

3 questions 3 sum linked list missing sum

Q1. System Design and hr principles
Ans. 
System design involves creating a high-level architecture of a software system, while HR principles focus on managing people effectively.
• System design involves identifying components, defining their interactions, and ensuring scalability and reliability.

• HR principles include hiring the right talent, providing training and development opportunities, and fostering a positive work culture.

• Both system design and HR princip...read more
Answered by AI
Add your answer
Q2. Projects discussion
Add your answer

Round one was an online coding test where there were 5 sections :

1 - dsa - medium

2 - Java - Easy

3 - OOP - Easy

4 - Git - Easy

Q1. 1 - where is bean annotation used in springboot ?... In class or method
Ans. 
Bean annotation is used in Spring Boot on class or method to indicate that a method produces a bean to be managed by the Spring container.
• Bean annotation is used on methods within a class to indicate that the method produces a bean to be managed by the Spring container.

• It can also be used at the class level to indicate that the class itself is a Spring bean.

• For example, @Bean annotation can be used on a method that cre...read more
Answered by AI
Add your answer
Q2. Which access modifier to restrict interface method access to only derived or implemented classes
Ans. 
Protected access modifier restricts interface method access to only derived or implemented classes.
• Use 'protected' access modifier to restrict access to only derived or implemented classes

• Protected members are accessible within the same package or by subclasses

• Example: 'protected void methodName() {}' in an interface
Answered by AI
Add your answer
Q3. How does one services interact with other in microservice
Ans. 
Microservices interact with each other through APIs, messaging, or events.
• Microservices communicate with each other through APIs, which can be synchronous or asynchronous.

• Messaging systems like RabbitMQ or Kafka can be used for communication between microservices.

• Events can be used for loosely coupled communication between microservices.

• Service discovery mechanisms like Eureka or Consul help microservices locate and co...read more
Answered by AI
Add your answer
Q4. In an integer array where element represent stock price and index represent days how to detect the best day to buy and best day to sell in O(N)
Ans. 
To detect the best day to buy and sell stock in an integer array representing stock prices and days in O(N).
• Iterate through the array and keep track of the minimum price seen so far.

• Calculate the profit by subtracting the current price from the minimum price.

• Update the maximum profit and best buy/sell days accordingly.

• Return the best buy and sell days to maximize profit.
Answered by AI
Add your answer
Q5. In an integer array find the next greatest number for all and display in O(N)
Ans. 
Find the next greatest number for each integer in an array in O(N) time complexity.
• Iterate through the array from right to left

• Use a stack to keep track of potential next greatest numbers

• Pop elements from the stack that are less than the current element and update their next greatest number to the current element

• Push the current element onto the stack

• Repeat until all elements have a next greatest number
Answered by AI
Add your answer

1st round was DSA round. Pretty easy

First round was aptitude with coding round it was easy

Q1. To check communication
Add your answer

Q1. Ask question based on datastructures
Add your answer

Q1. Data structures
Add your answer
Q2. Solid Principles
Add your answer
Q3. Single responsibility principle
Ans. 
Single responsibility principle states that a class should have only one reason to change.
• Each class should have only one responsibility

• Helps in making code more maintainable and easier to understand

• Promotes separation of concerns

• Example: A class that handles user authentication should not also handle file management
Answered by AI
Add your answer
Q4. Javascript question
Add your answer
Q5. Object oriented concepts
Add your answer

There were easy to medium dsa questions

Q1. Oops concept, explain each of them
Ans. 
Object-oriented programming concepts that help in organizing and structuring code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary
Answered by AI
Add your answer
Q2. Multithreading questions
Add your answer