Capgemini Engineering Senior Software Developer Interview Questions and Answers

Q1. Microservice Architecture
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Q2. Rest api vs soap api
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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
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Questions from Resume, solving code snippets, DSA Algo

Q1. Explain GCD, Core Data, Higher Order Functions, ARC
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GCD, Core Data, Higher Order Functions, ARC are key concepts in iOS development.
• GCD (Grand Central Dispatch) is a technology for managing concurrent operations.

• Core Data is a framework for managing the model layer objects in an application.

• Higher Order Functions are functions that operate on other functions, taking them as arguments or returning them.

• ARC (Automatic Reference Counting) is a memory management technology
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Q2. Weak Unowned, iOS App States
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Q1. Http1.1 vs 2.0 vs 3.0
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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
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Q2. Print all the possible subsets from a given slice of integers
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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
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Q3. Questions on GRPC implementation
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Q4. About code profiling
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Q5. What is context package in golanguage
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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
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Q6. RestApi vs GRPC
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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
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Q1. How to copy slice element and reflect the new changes done in original slice to new slice
Ans. 
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.
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Q2. How do you handle panic in golang
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Q3. Why golang is best compared to other languages
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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
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Q4. Explain Kubertnetes Architecture
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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
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Q1. Project related questions, database basic questions, python basics
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Q1. Regarding SQL i Cleared my Test
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Q2. What is CTE ? And Write a Sample Query ?
Ans. 
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;
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Q3. Print Numbers between 1 to 20 , even/odd numbers
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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).
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Q1. Max of the Questions which interviewer was asked i answered well
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Q1. Java and spring boot questions
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Q2. Sort the array in ascending order
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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.
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Q3. Java collections questions
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Q4. Project agile , cicdpipeline
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Q1. Brush up java and spring and sorting questions
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Basic php questions and laravel framework

Python core concepts and basic coding challenges