Capgemini Golang Developer Interview Questions, Process, and Tips

Golang Basics, DBMS, Channels, Unit Test

Q1. Basic go questions
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Q1. Go coding programs
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Q1. General HR questions and salary discussion
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Q1. Explain buffered and unbuffered channel
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Buffered channels allow multiple senders to send data without blocking, while unbuffered channels block until data is received.
• Buffered channels have a fixed capacity and can store multiple values until they are received

• Unbuffered channels have no capacity and block until a receiver is ready to receive the data

• Buffered channels are useful for improving performance in cases where there are multiple senders

• Unbuffered cha...read more
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Q2. Tell about your self,briefly explain your project
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I am a Golang developer with experience in building scalable web applications.
• Developed a RESTful API using Golang and MongoDB for a social media platform

• Implemented authentication and authorization using JWT

• Optimized database queries for improved performance

• Utilized Goroutines and channels for concurrent processing

• Integrated third-party APIs for data retrieval and processing
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Q3. Why we use go,advantages of golang,does any other language support garbage collection,go routines why we use'multithreading
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Go is a fast, efficient, and easy-to-learn programming language with built-in concurrency features.
• Advantages of Go include its speed, simplicity, and concurrency features.

• Garbage collection is supported by other languages such as Java, Python, and Ruby.

• Go routines allow for easy and efficient concurrency without the need for traditional multithreading.

• Go is used by companies such as Google, Uber, and Dropbox for its p
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Q4. What is channel,explains types of channel
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A channel is a way for goroutines to communicate with each other and synchronize their execution.
• Channels are typed and can only transmit values of that type.

• There are two types of channels: buffered and unbuffered.

• Unbuffered channels block until a sender and receiver are ready to communicate.

• Buffered channels have a fixed capacity and can transmit values without blocking until the buffer is full.

• Channels can be used t...read more
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Q5. Difference between buffered channel and unbuffered channel,error handling methods,how you solve error
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Buffered channels have a fixed capacity while unbuffered channels have no capacity limit.
• Buffered channels allow sending multiple values without blocking until the buffer is full.

• Unbuffered channels block until the sender and receiver are both ready to communicate.

• Error handling methods include returning errors as values, using panic and recover, and logging errors.

• Errors can be solved by identifying the root cause, im
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Q6. Can we return difference data type and how ,what architeture you worked in your project,does go have oops concepts
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Yes, Go allows returning different data types. Go has OOP concepts and I have worked with microservices architecture.
• Go allows returning different data types using interfaces.

• I have worked with microservices architecture using Go and Docker.

• Go has OOP concepts like structs and methods.
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Q7. Define empty interface and empty struct,difference between array and slice,difference between function and method
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Questions on Go programming language concepts
• Empty interface is an interface with no methods. Empty struct is a struct with no fields.

• Array has fixed size, slice is dynamic. Array is passed by value, slice is passed by reference.

• Function is standalone, method is associated with a type. Method has a receiver, function does not.
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Q8. Do you know dockers and kubernets,what is docker used for, how you do unit testing how many looping concepts we have in go what is go path and go root
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Questions on Docker, Kubernetes, unit testing, looping concepts, and Go path and root.
• Docker is a containerization platform used for packaging and deploying applications. Kubernetes is a container orchestration tool used for managing containerized applications.

• Unit testing in Go can be done using the built-in testing package and the 'go test' command.

• Go has only one looping concept, the 'for' loop.

• Go path is the locati...read more
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Q9. What is complicity faced in your project write a program on sorting
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Complicity faced in project: Handling concurrent requests and ensuring data consistency
• Implemented mutex locks to prevent race conditions

• Used channels to coordinate communication between goroutines

• Ensured atomicity of operations on shared data

• Implemented retry mechanisms to handle failed requests
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Q1. 1. defer,panic,recover 2. Linux Commands 3. Design Patterns any two patterns explanation
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Q2. 4. goroutine IN project 5. mysql (joins, indexies,triggers)
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Q3. 6. channels in project
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Channels are used for communication and synchronization between goroutines in a project.
• Channels allow safe communication between goroutines without the need for locks or condition variables.

• They can be used to synchronize the execution of multiple goroutines.

• Channels can be used to implement pipelines, where each stage of the pipeline is a goroutine that communicates with the next stage through a channel.

• Channels can ...read more
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Q4. 7. select case in project
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Q5. 8. interface in project
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Interfaces are used to define a set of methods that a type must implement.
• Interfaces allow for polymorphism and decoupling of code.

• They are commonly used in Go projects for defining contracts between different components.

• Interfaces can be used to create mock objects for testing purposes.

• An example of an interface in Go is the io.Reader interface, which defines the Read method.
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Q6. 9. inheritance concept
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Q7. 10 Docker commands and uses
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10 Docker commands and their uses
• docker run - starts a new container

• docker stop - stops a running container

• docker ps - lists all running containers

• docker images - lists all available images

• docker build - builds an image from a Dockerfile

• docker push - pushes an image to a registry

• docker pull - pulls an image from a registry

• docker exec - runs a command in a running container

• docker rm - removes a container

• docker rmi - rem
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