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Xebia Full Stack Developer Interview Questions, Process, and Tips

Updated 18 Jan 2023

Xebia Full Stack Developer Interview Experiences

1 interview found

Full Stack Developer Interview Questions & Answers

Anonymous

posted on 18 Jan 2023

Interview experience

Good

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

No response

I applied via Naukri.com and was interviewed in Dec 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.

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Round 2 - Technical

(9 Questions)

Q1. Explain MVC Lifecycle.

Ans.

MVC Lifecycle is the sequence of events that occur in the Model-View-Controller architectural pattern.

MVC stands for Model-View-Controller.
The lifecycle starts with a user request.
The controller receives the request and processes it.
The controller updates the model with the necessary data.
The view is then updated with the updated model data.
The updated view is sent back to the user as a response.

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Q2. Create a new Thread and explain the ways to create Threads in Java

Ans.

Creating Threads in Java

Extending the Thread class and overriding the run() method
Implementing the Runnable interface and passing it to a Thread constructor
Using Executor framework to create and manage threads
Using Callable and Future interfaces to create threads that return values

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Q3. What is HashMap? Difference between List and HashMap?

Ans.

HashMap is a data structure that stores key-value pairs. List is a collection of ordered elements.

HashMap allows fast retrieval of values based on keys.
List maintains the order of elements and allows duplicates.
HashMap uses hashing to store and retrieve elements.
List uses indexing to access elements.
HashMap is not thread-safe while List is thread-safe.
Example: HashMap<String, Integer> map = new HashMap<>();...

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Q4. Difference between HashMap and HashTree

Ans.

HashMap is a non-synchronized implementation of Map interface while HashTree is a synchronized implementation of Map interface.

HashMap is faster than HashTree as it is non-synchronized.
HashTree is thread-safe while HashMap is not.
HashMap allows one null key and multiple null values while HashTree does not allow null keys or values.
HashTree maintains the order of elements while HashMap does not.
HashMap is generally used...

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Q5. What class is used to connect with the Database?

Ans.

The class used to connect with the Database depends on the programming language and framework being used.

In Java, the class used is usually DriverManager or DataSource.
In Python, the class used is usually psycopg2 or mysql-connector.
In PHP, the class used is usually PDO or mysqli.
The specific class used may also depend on the type of database being used, such as MySQL, PostgreSQL, or MongoDB.

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Q6. What are the classes needed to create a GET REST API?

Ans.

Classes needed to create a GET REST API

Controller class to handle the request
Service class to perform business logic
Repository class to interact with database
Model class to define data structure
RequestMapping annotation to map the URL

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Q7. What is an Interface? What is default method in Interface?

Ans.

An interface is a blueprint of a class. Default method is a method in an interface with a default implementation.

An interface defines a set of methods that a class must implement
Default method provides a default implementation for a method in an interface
Default methods were introduced in Java 8
Default methods can be overridden by implementing classes

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Q8. How is an interface used?

Ans.

An interface is used to define a contract between two components in a system.

An interface defines a set of methods that a class must implement.
Interfaces are used to achieve abstraction and loose coupling.
Interfaces are used to create reusable code.
Interfaces are used to enable polymorphism.
Interfaces are used in many programming languages, including Java, C#, and TypeScript.

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Q9. Explain polymorphism in Java

Ans.

Polymorphism is the ability of an object to take on many forms.

Polymorphism allows objects of different classes to be treated as if they are objects of the same class.
It can be achieved through method overloading and method overriding.
Example: A parent class Animal can have multiple child classes like Dog, Cat, and Cow. All these child classes can have their own implementation of the method 'makeSound', which can be ca...

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Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare on Core Java concepts to crack the interview?

Skills evaluated in this interview

Top trending discussions

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Salary Discussions, Hike & Promotions

Experience - 5.9 Tech - React.js CTC- 13LPA Current company - TCS Offer in the process - Nagarro (19LPA) My LWD is 24th May, but I told Nagarro I can be released in 30 days. Now, should I: 1. Be honest and say I can join on 25th May? 2. Commit to 25th April and request a DOJ extension later?(By telling them some emergency) Q1). If I choose option 1, is there a risk they won’t release the offer?(As I am being hired for a particular project, so will they go for some immediate candidates?) Q2). If I choose option 2, could they revoke the offer?(As the HR told changing the DOJ in released offer letter is not possible

Nagarro offer: Kindly Help me to decide

Option 1

Option 2

115 participants . poll closed

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Software Developer Interview Questions & Answers

Bounteous x Accolite

Anonymous

posted on 11 Mar 2022

I appeared for an interview before Mar 2021.

Round 1 - Coding Test

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

21 students were shortlisted from the 1st MCQ round and in this round we were asked to write the codes (function only) of 3 questions in 1 hour time.

Q1.

Rotting Oranges Problem Statement

You are given a grid containing oranges where each cell of the grid can contain one of the three integer values:

0 - representing an empty cell
1 - representing a fre...

Ans.

Find the minimum time required to rot all fresh oranges in a grid.

Use Breadth First Search (BFS) to simulate the rotting process
Track the time taken to rot all oranges and return -1 if any fresh oranges remain
Handle edge cases like no fresh oranges or all oranges already rotten
Consider using a queue to efficiently process adjacent oranges

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Q2.

Majority Element Problem Statement

Given an array/list 'ARR' consisting of 'N' integers, your task is to find the majority element in the array. If there is no majority element present, return -1.

Exampl...

Ans.

Find the majority element in an array, return -1 if no majority element exists.

Iterate through the array and keep track of the count of each element using a hashmap.
Check if any element's count is greater than floor(N/2) to determine the majority element.
Return the majority element or -1 if no majority element exists.

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Q3.

Maximum Path Sum Between Two Leaves Problem Description

You are provided with a non-empty binary tree in which each node contains a non-negative integer value. Your task is to find and return the maximum ...

Ans.

Find the maximum path sum between two leaf nodes in a binary tree.

Traverse the tree to find the maximum path sum between two leaf nodes.
Keep track of the maximum sum found so far.
Consider all possible paths between leaf nodes.
Handle cases where the tree has only a single leaf node.
Implement a recursive function to calculate the maximum path sum.

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Round 2 - Face to Face

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This was a technical round with DSA based questions.

Q1.

N-th Node From The End Problem Statement

You are given a Singly Linked List of integers. The task is to find the N-th node from the end of the list.

Example:

Input:

If the given list is (1 -> -2 -&g...

Ans.

Find the N-th node from the end of a Singly Linked List of integers.

Traverse the list to find the length L of the list.
Calculate the position of the N-th node from the beginning as L - N + 1.
Traverse the list again to reach the calculated position and return the node's value.

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Q2.

LCA of Binary Tree Problem Statement

You are given a binary tree consisting of distinct integers and two nodes, X and Y. Your task is to find and return the Lowest Common Ancestor (LCA) of these two nodes...

Ans.

Find the Lowest Common Ancestor (LCA) of two nodes in a binary tree.

Traverse the binary tree to find the paths from the root to nodes X and Y.
Compare the paths to find the last common node, which is the LCA.
Handle cases where one node is an ancestor of the other or when one node is the LCA itself.

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Q3.

Reverse Words in a String: Problem Statement

You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...

Ans.

Reverse words in a string while handling leading/trailing spaces and multiple spaces between words.

Split the input string by spaces to get individual words
Reverse the list of words
Join the reversed words with a single space in between
Handle leading/trailing spaces by stripping them before and after reversing

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Round 3 - Face to Face

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on DSA

Q1.

Minimum Time To Solve The Problems

Given 'N' subjects, each containing a certain number of problems, and 'K' friends, assign subjects to friends such that each subject goes to exactly one friend, maintain...

Ans.

Assign subjects to friends to minimize maximum workload, find minimum time for most loaded friend.

Sort subjects in descending order
Assign subjects to friends one by one until all subjects are assigned
The maximum workload will be the sum of problems assigned to the friend with the most problems
Return the maximum workload as the minimum time required

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Q2. What is grammar in the context of compiler design?

Ans.

Grammar in compiler design defines the syntax and structure of a programming language.

Grammar specifies the rules for forming valid statements in a programming language.
It consists of a set of production rules that define how valid programs can be constructed.
There are different types of grammars such as context-free grammar, regular grammar, etc.
Example: In C programming language, the grammar specifies that a for loop...

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Q3. What is a token in compiler design?

Ans.

A token in compiler design is a basic unit of syntax that the compiler can understand and process.

Tokens are the smallest units of a program that are meaningful to the compiler.
Examples of tokens include keywords, identifiers, operators, and punctuation symbols.
Tokens are generated by the lexical analysis phase of the compiler.
Tokens are used by the parser to build the abstract syntax tree of the program.

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Round 4 - Video Call

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions on DSA and Compiler Design mainly. He told me that you’ll be having your final HR round in some time. I knew that I was going well because he seemed to be quite satisfied with my answers.

Q1.

Sum Root to Leaf Numbers

You are given an arbitrary binary tree consisting of N nodes, each associated with an integer value from 1 to 9. Each root-to-leaf path can be considered a number formed by concat...

Ans.

Find the total sum of all root to leaf paths in a binary tree formed by concatenating node values.

Traverse the binary tree from root to leaf nodes, keeping track of the current path sum
Add the current path sum to the total sum when reaching a leaf node
Use modulo (10^9 + 7) to handle large outputs

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Q2. What is a regular language?

Ans.

A regular language is a language that can be recognized by a finite automaton.

Regular languages can be described by regular expressions.
Regular languages are closed under union, concatenation, and Kleene star operations.
Examples of regular languages include the set of all strings over an alphabet that contain an even number of 'a's.

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Q3. What are NP and NP-Hard problems?

Ans.

NP problems are decision problems that can be verified in polynomial time, while NP-Hard problems are at least as hard as the hardest problems in NP.

NP problems can be verified in polynomial time but not necessarily solved in polynomial time.
NP-Hard problems are at least as hard as the hardest problems in NP, but may not be in NP themselves.
Examples of NP problems include the subset sum problem and the traveling salesm...

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Round 5 - HR

Round duration - 30 minutes
Round difficulty - Easy

That was the round for which I’ve been waiting for hours
She was very friendly and nice to talk to. It didn’t seem that I was talking to the HR. It was more like talking to a friend. Finally we discussed about the pay-scale and work culture in Accolite.