Arcon TechSolutions Senior Software Developer Interview Questions and Answers

REST API is lightweight, flexible, and widely used, while SOAP API is more rigid and heavy.

• REST API uses standard HTTP methods like GET, POST, PUT, DELETE, while SOAP API uses XML for communication.

• REST API is stateless and can be cached, making it faster, while SOAP API is stateful and requires more bandwidth.

• REST API is easier to implement and understand, while SOAP API has more built-in security features.

• Examples: R

HTTP/1.1 is the older version with persistent connections, HTTP/2.0 introduces multiplexing and server push, and HTTP/3.0 uses QUIC protocol for faster performance.

• HTTP/1.1 uses persistent connections for each request/response, leading to potential performance issues.

• HTTP/2.0 introduces multiplexing, allowing multiple requests/responses to be sent over a single connection simultaneously.

• HTTP/2.0 also supports server pu...read more

Print all possible subsets from a given slice of integers

• Use recursion to generate all possible subsets

• For each element in the slice, include or exclude it in the subset

• Keep track of the current subset being generated

Context package in Go language provides a way to pass around deadlines, cancellation signals, and other request-scoped values.

• Context package is used to manage deadlines, cancellation signals, and request-scoped values in Go programs.

• It allows passing data between function calls without having to pass them explicitly as arguments.

• Context package is commonly used in web servers to manage request-specific data and timeou...read more

REST API is a standard protocol for web services using HTTP, while gRPC is a high-performance, open-source RPC framework.

• REST API uses HTTP for communication, making it easy to implement and widely supported.

• gRPC is a modern, high-performance RPC framework that uses HTTP/2 for transport and Protocol Buffers for serialization.

• gRPC is more efficient in terms of performance and supports features like bidirectional streami...read more

Use copy() function to create a new slice and reflect changes in original slice to the new slice.

• Use the copy() function to create a new slice with the same length as the original slice.

• Make changes to the original slice.

• The changes made to the original slice will automatically reflect in the new slice as well.

GoLang is best for its simplicity, efficiency, concurrency support, and strong community backing.

• Efficient performance due to compiled nature and garbage collection

• Concurrency support with goroutines and channels

• Strong standard library with built-in support for networking, encoding, and more

• Simple and clean syntax that promotes readability and maintainability

• Growing community and ecosystem with popular frameworks like

Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.

• Kubernetes follows a master-slave architecture with a master node controlling multiple worker nodes.

• Master node components include API server, scheduler, controller manager, and etcd.

• Worker node components include kubelet, kube-proxy, and container runtime (e.g. Docker).

• Kubernet...read more

CTE stands for Common Table Expressions, used to create temporary result sets within a SQL query.

• CTE is defined using the WITH keyword in SQL.

• It helps in simplifying complex queries by breaking them into smaller, more manageable parts.

• CTEs can reference themselves recursively, making them useful for hierarchical data.

• Example: WITH cte AS (SELECT * FROM table_name) SELECT * FROM cte;

Print even and odd numbers between 1 to 20.

• Iterate from 1 to 20 and check if the number is even or odd.

• Use a conditional statement to determine if the number is even or odd.

• Print the number along with its type (even or odd).

Map transforms each element of a collection, while flatMap transforms each element into a new collection and flattens the result.

• Map applies a function to each element of a collection and returns a new collection with the results

• FlatMap applies a function that returns a collection to each element of a collection, then flattens the result into a single collection

• Example: map([1, 2, 3], x => [x, x+1]) returns [[1, 2], [2...read more

Comparable is an interface used for comparing objects, while Comparator is a separate class used for custom sorting.

• Comparable is implemented by the class whose objects need to be compared, while Comparator is a separate class used for custom sorting.

• Comparable has a single method, compareTo(), which is used to compare objects, while Comparator has a method, compare(), for custom sorting logic.

• Comparable is used for na...read more

Sorts an array of strings in ascending order.

• Use a sorting algorithm like bubble sort, insertion sort, or quicksort.

• Compare adjacent elements and swap them if they are in the wrong order.

• Repeat the process until the array is sorted.