OHUM Healthcare Solutions Software Developer Interview Questions and Answers

Q1. Explain Behaviour subject in Angular.
Ans. 
Behaviour subject in Angular is a special type of subject that allows both subscribing and emitting values.
• BehaviourSubject is a type of subject in RxJS library.

• It has an initial value that will be emitted to new subscribers.

• It stores the latest value and emits it immediately to new subscribers.

• Example: const subject = new BehaviorSubject('initial value');

• Example: subject.next('new value');
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Q2. Explain Design Principles
Ans. 
Design principles are guidelines for designing software solutions that are maintainable, scalable, and efficient.
• Design principles help in creating software that is easy to understand, modify, and maintain.

• They promote code reusability, modularity, and flexibility.

• Examples of design principles include SOLID principles, DRY (Don't Repeat Yourself), KISS (Keep It Simple, Stupid), and YAGNI (You Aren't Gonna Need It).
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Q1. Anagram of two strings in java
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Q2. Insert and select query in MySQL
Ans. 
Insert and select data in MySQL using SQL queries
• Use INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...); to insert data

• Use SELECT * FROM table_name; to select all data from a table

• Use SELECT column1, column2 FROM table_name WHERE condition; to select specific data based on a condition
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Q3. Get and Post APIs in rest
Ans. 
GET and POST are HTTP methods used in REST APIs for retrieving and sending data.
• GET method is used to retrieve data from a server

• POST method is used to send data to a server

• GET requests are idempotent, while POST requests are not

• GET requests should only be used for retrieving data, not for modifying data

• Example: GET request to retrieve a list of users - GET /users

• Example: POST request to create a new user - POST /users
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Q1. Role check
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Q2. Tech stackP
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Q1. Project based questions
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Q2. AWS related questions
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Normal question of reasoning and maths

Sorting arraylist , sorted map

Q1. Is sql necessary for your project ?
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Q2. What is Hql ?
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Q3. What are views ?
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Q4. What are cross joins ?
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Q5. Difference between delete and truncate
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