FlexTrade Systems Inc. Senior Software Engineer Interview Questions and Answers

Q1. What is dependency injection
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing mock dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.
Answered by AI
Add your answer
Q2. What is state in react
Ans. 
State in React is a JavaScript object that stores data and determines how a component renders and behaves.
• State is mutable and can be updated using the setState() method

• State should be used for data that will change over time and affect the component's rendering

• State should not be modified directly, use setState() instead
Answered by AI
Add your answer

Q1. Tell me your project details
Ans. 
Developed a web application for online shopping with user authentication and payment gateway integration.
• Used React.js for front-end development

• Implemented user authentication using JWT tokens

• Integrated Stripe API for payment processing
Answered by AI
Add your answer

Q1. Oops concepts explained
Add your answer

Q1. Optimization Techniques
Ans. 
Optimization techniques are methods used to improve the efficiency and performance of software applications.
• Use of algorithms like dynamic programming and greedy algorithms

• Profiling and performance tuning to identify bottlenecks

• Code refactoring to improve readability and maintainability

• Utilizing caching and memoization for faster access to data

• Parallel processing and multi-threading for improved concurrency
Answered by AI
Add your answer

Q1. Data Structure based questions - medium level difficulty
Add your answer
Q2. Another DS Algo based ques on Arrays, tree, linkedlist
Add your answer

Q1. Core java based ques
Add your answer
Q2. Logical questions
Add your answer

Q1. Code Singleton in Java
Ans. 
Singleton pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance variable of the class.

• Make the constructor private to prevent instantiation from outside the class.

• Provide a static method to get the instance, creating it if necessary.
Answered by AI
Add your answer
Q2. Code Angular Component Service
Add your answer

It was a coding test consisting of medium level questions

Q1. Don't remember the questions
Add your answer

Q1. Don't remember the questions
Add your answer

Q1. Simple question not very hard related to java
Add your answer

Machine coding round, try to come up with at least one working requirement

Q1. Low level design
Add your answer
Q2. Cant share the exact quesy
Add your answer

Q1. High level design
Add your answer

Q1. Hiring manager round
Add your answer