Sugoi Labs Product Development Engineer Interview Questions and Answers

C and Golang related questions, 2 Hours assement, The test involved writing code by hand in paper in the office (Bengaluru)

Q1. Write a go code to remove duplicate elements from a slice.
Ans. 
Go code to remove duplicate elements from a slice of strings
• Use a map to keep track of unique elements

• Iterate over the slice and add elements to the map

• Create a new slice with unique elements from the map
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Q2. Difference between array and slice in Go.
Ans. 
Arrays have fixed length, slices are dynamic and can grow/shrink. Slices are references to arrays.
• Arrays have fixed length, specified at compile time.

• Slices are dynamic, can grow or shrink at runtime.

• Slices are references to arrays, allowing for more flexibility.

• Example: var arr [3]string // array with fixed length of 3

• Example: slice := make([]string, 0) // slice with dynamic length
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Q3. Explain struct and interface
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Struct is a user-defined data type that groups related data fields together. Interface defines a set of methods that a type must implement.
• Struct is used to create complex data structures by grouping related data fields together.

• Interface defines a set of methods that a type must implement. It allows for polymorphism in Go.

• Example: type Person struct { Name string; Age int }

• Example: type Shape interface { Area() float6...read more
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Q4. What is containerization.
Ans. 
Containerization is a method of packaging, distributing, and running applications in isolated environments called containers.
• Containers are lightweight, portable, and can run on any platform that supports containerization.

• They include everything needed to run the application, such as code, runtime, system tools, libraries, and settings.

• Popular containerization tools include Docker, Kubernetes, and Podman.

• Containerizati...read more
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Q5. Write a go code to implement struct.
Ans. 
Implementing a struct in Go code
• Define a struct using the 'type' keyword

• Add fields to the struct with their respective data types

• Access struct fields using dot notation
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Q6. Explain goroutine.
Ans. 
Goroutine is a lightweight thread managed by Go runtime, allowing concurrent execution of functions.
• Goroutines are created using the 'go' keyword in Go programming language.

• They are more lightweight than threads and are managed by the Go runtime.

• Goroutines allow for concurrent execution of functions without the need for manual thread management.

• Example: go myFunction()

• Example: go func() { // code here }
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Q7. How do you achieve concurrency in Go?
Ans. 
Concurrency in Go is achieved using goroutines and channels.
• Use goroutines to run functions concurrently

• Communicate between goroutines using channels

• Avoid using shared memory for synchronization
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Q8. What is channel in Go? What are the differences between buffered and unbuffered channel?
Ans. 
A channel in Go is a communication mechanism that allows goroutines to communicate with each other.
• Buffered channels have a specific capacity and can send multiple values without the need for a corresponding receive operation immediately.

• Unbuffered channels have no capacity and require both a send and receive operation to be ready at the same time for communication to occur.
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Q9. What is scaling? Horizontal and vertical scaling.
Ans. 
Scaling refers to the ability of a system to handle increasing amounts of work or its potential to accommodate growth.
• Horizontal scaling involves adding more machines to distribute the load, while vertical scaling involves increasing the resources of a single machine.

• Horizontal scaling is more cost-effective and provides better fault tolerance, but can be more complex to implement.

• Vertical scaling is simpler to impleme...read more
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Q1. DBMS: Indexing Python: Monkey Patching
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Q1. What id oops and its advantages
Ans. 
OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• Advantages of OOPs include code reusability, modularity, flexibility, and easier maintenance.

• Encapsulation allows data hiding and protection, reducing complexity and increasing security.

• Inheritance enables code reuse and promotes the creation of hierarchical relationships between classes.

• Polymorphism allows objects...read more
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Q2. What is jquery and JavaScript
Ans. 
jQuery is a JavaScript library that simplifies HTML document traversal and manipulation, event handling, and animation.
• jQuery is a fast, small, and feature-rich JavaScript library.

• It makes things like HTML document traversal and manipulation, event handling, and animation much simpler with an easy-to-use API.

• jQuery simplifies common tasks like AJAX calls and DOM manipulation.

• JavaScript is a programming language that en...read more
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Ecom is core platform

Q1. What is php and its advantages
Ans. 
PHP is a server-side scripting language used for web development.
• PHP stands for Hypertext Preprocessor.

• It is open source and widely used for creating dynamic web pages.

• Advantages include easy integration with HTML, support for various databases, and compatibility with different operating systems.

• PHP code can be embedded within HTML code, making it easy to work with web content.

• Popular websites like Facebook and WordPre
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Q2. How are you hope you doing well
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Basic of aptitude questions

We want to write coding based the question

Q1. Self introduction
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Q2. Technical questions
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Q1. Java opps, collection, spring boot
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Q2. What is string buffer
Ans. 
String buffer is a data structure that stores and manipulates a sequence of characters.
• String buffer is mutable, meaning it can be modified after creation.

• It is often used for efficient string manipulation, such as concatenation or appending.

• Examples include StringBuffer class in Java and StringBuilder class in C#.
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Q3. What is different hasmap and has table
Ans. 
HashMap and HashTable are both data structures in Java used to store key-value pairs, but HashMap is not synchronized and allows null keys/values, while HashTable is synchronized and does not allow null keys/values.
• HashMap is not synchronized, while HashTable is synchronized

• HashMap allows null keys and values, while HashTable does not

• HashMap is faster than HashTable

• HashMap is part of Java Collections framework, while H
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Q4. What is the exception
Ans. 
An exception is an event that disrupts the normal flow of a program's execution.
• Exceptions are used to handle errors and other exceptional events in software.

• They can be caught and handled using try-catch blocks.

• Examples of exceptions include NullPointerException, ArrayIndexOutOfBoundsException, and IOException.
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Q1. Manager, project desscusion
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Leetcode practice should be sufficient to tackle this round.

Q1. Trapping Rain Water problem.
Ans. 
Trapping Rain Water problem involves calculating the amount of water that can be trapped between buildings given their heights.
• Calculate the maximum height of buildings to the left and right of each building

• Find the minimum of the two heights

• Subtract the height of the current building to get the amount of water that can be trapped at that building
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3 questions, medium hard

Q1. Greedy Algorithm, simple jumps question, easily approachable by greedy algorithm
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Q2. Binary Search, simple array based
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Q1. DBMS, Projects, SQL Queries
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Q2. 2 coding questions
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