10+ Al-Kindi Hospital‎ Interview Questions and Answers

I use lambda expressions, streams, and default methods in my current project.

• Lambda expressions: I use them to write more concise and functional code.

• Streams: I use them for processing collections of data in a declarative way.

• Default methods: I use them to provide default implementations in interfaces.

The Java program counts the length of a string without using foreach and length function.

• Iterate through each character of the string using a for loop

• Increment a counter variable for each character encountered

• Return the counter variable as the length of the string

SQL query to find the 2nd highest salary of an employee.

• Use the SELECT statement to retrieve the salaries in descending order.

• Use the LIMIT clause to limit the result to the second row.

• Use the OFFSET clause to skip the first row.

• Combine the above steps in a single SQL query.

HashMap is an implementation of Map interface that stores key-value pairs using a hash table.

• HashMap uses hashing to store and retrieve elements.

• It uses an array of linked lists to handle collisions.

• The hash code of the key is used to determine the index of the array.

• If multiple keys have the same hash code, they are stored in the same linked list.

• When retrieving a value, the hash code is used to find the correct linked list and then linearly search for the key.

To avoid hash collisions, use a good hash function, increase the size of the hash table, and handle collisions using techniques like chaining or open addressing.

• Use a good hash function that distributes the keys evenly across the hash table.

• Increase the size of the hash table to reduce the chances of collisions.

• Handle collisions using techniques like chaining (using linked lists) or open addressing (probing).

• Chaining example: Store multiple values with the same hash key in a ...read more

There are three types of iterators in Java: Iterator, ListIterator, and Enumeration.

• Iterator is the most commonly used iterator, used to traverse collections like ArrayList, HashSet, etc.

• ListIterator is used to traverse lists and allows bidirectional traversal and modification of elements.

• Enumeration is the oldest type of iterator, used to traverse legacy collections like Vector and Hashtable.

Yes, I have experience working with gRPC, Kafka, and payment gateways.

• I have implemented gRPC for building high-performance, scalable APIs.

• I have used Kafka for real-time data streaming and processing.

• I have integrated payment gateways like PayPal and Stripe for secure online transactions.

Design REST APIs to update Employee First name in the database

• Create a PUT endpoint '/employees/{id}' to update employee first name

• Use proper authentication and authorization mechanisms to secure the API

• Validate input data to prevent SQL injection or other security vulnerabilities

I have used tools like JUnit, NUnit, and MSTest for unit testing.

• JUnit

• NUnit

• MSTest

Object-oriented programming concepts like inheritance, polymorphism, encapsulation, and abstraction.

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

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

Bug life cycle is the process of identifying, reporting, fixing, retesting, and closing bugs in software testing.

• Bug identification: Finding and documenting the bug

• Bug reporting: Informing the development team about the bug

• Bug fixing: Developers resolve the bug

• Bug retesting: Testing the fixed bug to ensure it is resolved

• Bug closing: Marking the bug as closed once verified

Setting up network flow in AWS involves configuring VPCs, subnets, routing, and security groups for optimal traffic management.

• Create a Virtual Private Cloud (VPC) to define your network boundary.

• Use subnets to segment your VPC into different zones (public/private).

• Set up route tables to control traffic flow between subnets and the internet.

• Implement security groups and network ACLs to manage inbound and outbound traffic.

• Utilize AWS Transit Gateway for interconnecting multipl...read more