Stratus Technologies Software Developer II Interview Questions and Answers

Q1. What are custom hooks in React, and what are their use cases? Additionally, can you provide an example of a custom hook that performs an API call and utilizes the retrieved data?
Add your answer
Q2. What is the difference between useMemo and useCallback in React?
Add your answer
Q3. What is the difference between class-based components and functional components in React?
Add your answer
Q4. How can you implement the lifecycle of a React component in a functional component?
Add your answer
Q5. What are the various state management techniques available in React?
Add your answer
Q6. What is the architecture of Redux, and what purposes do middlewares serve within it?
Add your answer
Q7. What is hoisting in JavaScript?
Add your answer
Q8. What is event bubbling in JavaScript?
Add your answer
Q9. What are block scope and function scope in JavaScript?
Add your answer
Q10. Have you had experience working with semantic tags in HTML?
Add your answer
Q11. What are the various methods for creating an object in JavaScript?
Add your answer
Q12. What are the differences between shallow copy and deep copy in JavaScript?
Add your answer
Q13. What will be the output of the following JavaScript code fragment: `const a; function test() { console.log(a); }; test();`?
Add your answer
Q14. How can you use CSS to arrange elements in a row and column layout?
Add your answer
Q15. Have you utilized CSS preprocessors, and if so, which ones?
Add your answer
Q16. If I have assigned different colors to an ID and a class and applied both to the same element, which color will be applied based on CSS specificity precedence?
Add your answer

Easy programms based on Array and strings

Q1. Like this is combined round technical +Hr
Add your answer
Q2. All the question related to projects
Add your answer
Q3. Your role in project , benefits of your project etc
Add your answer

Q1. Difference between out and ref.
Add your answer
Q2. Sql query to find the 2nd last student marks
Add your answer
Q3. Second round was around project specific like why mongodb or posgreSQL? Project architecture and followup questions.
Add your answer
Q4. Create global exception handler.
Add your answer

Q1. Difference between SQL and NoSQL databases?
Add your answer
Q2. What are the methods for enabling communication between microservices?
Add your answer

The aptitude assessment consists of two sections: 1) a technical test, which includes 40 questions, and 2) a game-based test.

Q1. There are different sections in communicton test. Like reading , listening, sentence , correction, Grammer checking and story telling
Add your answer

Q1. All the questions like OOPs concept, database concepts, cloud computing- what iare the 3 types of cloud models, operating system-what is deadlock computer network= different layers in CN situation based...read more
Add your answer

Q1. 1) OOPS in java, and told to explain abstraction, encapsulation, inheritance with practical code 2) Exception handling(globally), Authentication and authorization 3) SOLID principles and factory design pat...read more
Ans. 
Interview questions for Software Engineer position covering OOPS concepts, exception handling, SOLID principles, Java 8 features, and Streams.
• Abstraction in OOPS: Hiding implementation details. Example: Abstract class Shape with method draw().

• Encapsulation in OOPS: Bundling data and methods that operate on the data. Example: Class Employee with private fields and public getters/setters.

• Inheritance in OOPS: Reusing code...read more
Answered by AI
Add your answer
Q2. 1) Advantage of springboot over spring 2) Tell me all the anotations you know in spring 3) What are CRUD operations, write controller layer and use validating annotations like @NotNull, @valid etc. how to ...read more
Ans. 
The interview questions cover various topics related to Spring framework, REST vs SOAP, JPA repository, Feign client, circuit breaker, and Spring Security.
• Spring Boot provides a simpler and faster way to set up and run Spring applications compared to traditional Spring.

• Common annotations in Spring include @Controller, @Service, @Repository, @Autowired, @Component, @RequestMapping, @GetMapping, @PostMapping, @PutMapping...read more
Answered by AI
Add your answer
Q3. 1) ACID properties 2) DBMS commands 3) inner queries 4) Joins 5) S3 bucket congif and how to handle file and upload and retrieve in s3 6) Ci/Cd basic flow and docker explaination
Add your answer

Q1. List down Java 8 features and use case
Ans. 
Java 8 introduced several new features including lambda expressions, streams, and functional interfaces.
• Lambda expressions: Allow for more concise and readable code by enabling functional programming.

• Streams: Provide a way to work with collections of objects in a more functional style.

• Functional interfaces: Interfaces with a single abstract method, used to enable lambda expressions.

• Optional class: Helps to avoid null p...read more
Answered by AI
Add your answer
Q2. List down Spring boot annotation used
Ans. 
Spring boot annotations are used to simplify the development process by providing metadata to the Spring framework.
• 1. @SpringBootApplication - Main annotation to indicate the main class of a Spring Boot application.

• 2. @RestController - Annotation for RESTful web services.

• 3. @Autowired - Dependency injection annotation.

• 4. @GetMapping, @PostMapping, @PutMapping, @DeleteMapping - Annotations for mapping HTTP requests to c...read more
Answered by AI
Add your answer
Q3. Difference between String builder and String Buffer
Ans. 
String Builder is not synchronized and faster, while String Buffer is synchronized and slower.
• String Builder is not thread-safe, while String Buffer is thread-safe.

• String Builder is faster due to lack of synchronization, while String Buffer is slower due to synchronization.

• String Builder is recommended for single-threaded operations, while String Buffer is recommended for multi-threaded operations.
Answered by AI
Add your answer
Q4. What is String pool
Ans. 
String pool is a storage area in memory where strings are stored to optimize memory usage by reusing common strings.
• String pool helps in reducing memory usage by storing only one copy of each unique string.

• Strings created using double quotes are stored in the string pool.

• Strings created using new keyword are not stored in the string pool.
Answered by AI
Add your answer
Q5. Number of memory type have. like heap memory , stack
Ans. 
There are two main types of memory in a computer system: stack memory and heap memory.
• Stack memory is used for static memory allocation and is managed by the compiler. It is typically faster but limited in size.

• Heap memory is used for dynamic memory allocation and is managed by the programmer. It is slower but has a larger size.

• Examples: C programming language uses stack memory for function calls and heap memory for dy
Answered by AI
Add your answer

Q1. Too much focus on theory questions. Like how would you link multiple middleware - write code for that
Add your answer