eClinicalWorks Interview Questions, Process, and Tips

The interview went well, and the test was straightforward, so there is no need to worry.

Q1. Tell me about yourself
Ans. 
I am a recent graduate with a degree in computer science and a passion for coding and problem-solving.
• Recent graduate with a degree in computer science

• Passionate about coding and problem-solving

• Experience with programming languages such as Java, Python, and C++

• Completed internships at tech companies to gain practical experience
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Q2. Tell me about your college project
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Developed a mobile application for tracking daily water intake and providing reminders.
• Designed user interface using Adobe XD

• Implemented backend using Firebase for real-time data syncing

• Integrated push notifications for reminder feature
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An easy assignment that involved a use case.

Q1. Previous projects
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Q2. Scenario based questions
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Q1. What are fetaures of Java?
Ans. 
Java is a popular programming language known for its platform independence, object-oriented features, and robust libraries.
• Platform independence - Java programs can run on any platform that has a Java Virtual Machine (JVM)

• Object-oriented - Java supports the principles of encapsulation, inheritance, and polymorphism

• Robust libraries - Java has a vast collection of libraries for various tasks such as networking, database
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Q2. What is exception handling and why it is important?
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Exception handling is a mechanism to handle runtime errors in a program to prevent crashes and ensure graceful error recovery.
• Allows for graceful handling of runtime errors

• Prevents program crashes

• Ensures proper error recovery

• Helps in debugging and maintaining code

• Examples: try-catch blocks in Java, catch blocks in C++
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Q3. What is inheritance?
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Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can access public and protected members of the base class

• Example: Class Car can inherit from class Vehicle to reuse commo
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Q4. What is abtract class?
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Abstract class is a class that cannot be instantiated and may contain abstract methods that must be implemented by subclasses.
• Cannot be instantiated directly

• May contain abstract methods

• Subclasses must implement abstract methods

• Used for defining common behavior for subclasses
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Q1. Why you want to join eClinicalWorks
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Q2. Why we should hire you
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Q1. What is immutable class ?
Ans. 
Immutable class is a class whose instances cannot be modified after creation.
• Instances of immutable class cannot be changed once created

• Immutable classes are often used for objects that should not be modified, like dates or strings

• Examples of immutable classes in Java are String, Integer, and LocalDate
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Q2. How create immutable class?
Ans. 
Immutable class can be created by making all fields private and final, providing only getters and no setters.
• Make all fields private and final

• Provide only getters, no setters

• Avoid modifying state within the class
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Q3. What is singleton class
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A singleton class is a class that can only have one instance created throughout the entire application.
• Singleton classes are often used for logging, driver objects, caching, thread pools, database connections, etc.

• They have a private constructor to prevent instantiation from other classes.

• They provide a global point of access to the instance.
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Q4. Write program for immutable class
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Immutable class is a class whose state cannot be modified after creation.
• Use final keyword to make class immutable

• Make all fields private and final

• Do not provide setter methods

• Return new instances when modifying state
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Q1. Write Immutable class program
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Immutable class program in Java
• Use the 'final' keyword to make class immutable

• Make all fields private and final

• Do not provide setter methods, only getter methods

• Ensure deep copy of mutable objects in constructor or getter methods
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Q2. Difference between controller vs restcontroller
Ans. 
Controller is a general term for classes that handle incoming requests, while RestController is specifically for RESTful web services in Spring.
• Controller is a general term for classes that handle incoming requests in a web application.

• RestController is a specialized version of a controller that is used for creating RESTful web services in Spring framework.

• RestController is annotated with @RestController, which combine...read more
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Q3. Can we write controller annotation instead of service annotation
Ans. 
No, controller and service annotations serve different purposes in a software application.
• Controller annotations are used to define the entry points for incoming requests and map them to specific methods in a controller class.

• Service annotations are used to mark a class as a service component that can be injected into other classes for business logic implementation.

• Mixing up controller and service annotations can lead ...read more
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Q1. What === parameter in javascript?
Ans. 
=== is a strict equality operator in JavaScript that checks if two values are equal in type and value.
• === compares two values without type conversion

• Returns true if both values are strictly equal, false otherwise

• Example: 5 === '5' returns false because they are of different types
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Q2. What is difference heap vs stack memory
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Heap memory is used for dynamic memory allocation, while stack memory is used for static memory allocation.
• Heap memory is allocated at runtime and can be accessed randomly, while stack memory is allocated at compile time and is accessed in a LIFO order.

• Heap memory is managed manually by the programmer, while stack memory is managed automatically by the system.

• Heap memory is larger in size compared to stack memory, but ...read more
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Q3. What is JSP ?
Ans. 
JSP stands for JavaServer Pages, a technology used for creating dynamic web pages using Java.
• JSP allows embedding Java code in HTML pages

• It is compiled into servlets by the server before execution

• JSP simplifies the process of developing web applications by separating the presentation layer from the business logic
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Q1. In next 5year on position you look to yourself
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