Etraveli Group Junior Business Intelligence Developer Interview Questions and Answers

Q1. What is the implementation of Merge Sort in Java?
Ans. 
Merge Sort is a divide and conquer algorithm that divides the input array into two halves, recursively sorts them, and then merges the sorted halves.
• Divide the input array into two halves

• Recursively sort the two halves

• Merge the sorted halves back together
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Q2. What is the implementation of the Quick Sort algorithm in Java?
Ans. 
Quick Sort is a popular sorting algorithm that uses a divide-and-conquer approach to sort elements in an array.
• Choose a pivot element from the array.

• Partition the array into two sub-arrays: elements less than the pivot and elements greater than the pivot.

• Recursively apply the same process to the sub-arrays.

• Combine the sorted sub-arrays to get the final sorted array.
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Given an simple gaming questions to be developed in JS

Given another UI design in image to be developed

45 min, Quantitative aptitude topics, speed and distance

Variable declarations, basic syntax, data type and structures

Q1. Tell me something about your self ?
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Q1. OOPs concept like polymorphism inheritance etc
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Array question... like how to remove duplicate element from array ?
Prime number or not
Etc...

Q1. Why should hire you?
Ans. 
I have the technical skills, experience, and passion to excel in this role.
• I have a strong background in software development, with experience in multiple programming languages and frameworks.

• I am a quick learner and enjoy staying up-to-date with the latest technologies and industry trends.

• I am a team player and have experience collaborating with cross-functional teams to deliver high-quality software solutions.

• I am pa...read more
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Q2. Why you fit for this job?
Ans. 
I have the required technical skills and experience to excel in this role.
• I have a degree in Computer Science and have worked as a software developer for 5 years.

• I am proficient in multiple programming languages including Java, Python, and C++.

• I have experience working with databases and have developed several web applications.

• I am a quick learner and enjoy working in a team environment.

• I am passionate about software d...read more
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Q3. Tell me about your self?
Ans. 
I am a software developer with experience in Java and Python.
• I have a Bachelor's degree in Computer Science.

• I have worked on projects involving web development, data analysis, and machine learning.

• I am proficient in Java and Python programming languages.

• I am familiar with various software development tools and frameworks such as Spring, Django, and Flask.

• I am a quick learner and enjoy working in a team environment.
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Q1. 1. Questions around projects : JWT, UserAuthentication etc
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Q2. 2. Write a code to find frequency of characters in a given string?
Ans. 
Code to find frequency of characters in a given string
• Use a hash table to store character frequencies

• Iterate through the string and update the hash table accordingly

• Print the hash table to display the character frequencies
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Q1. 1. Write a code to reverse a linked list?
Ans. 
Code to reverse a linked list
• Create three pointers: prev, curr, and next

• Initialize prev to null and curr to head

• Loop through the list and set next to curr's next node

• Set curr's next node to prev

• Move prev and curr one node ahead

• Return prev as the new head
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Q2. 2. Write a code to reverse linked list in size of K?
Ans. 
Code to reverse linked list in size of K
• Create a function that takes head of linked list and size K as input

• Traverse the linked list in groups of K nodes

• Reverse each group of K nodes using iterative or recursive approach

• Connect the reversed groups to form the final linked list

• Return the new head of the reversed linked list
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Q3. 3. Questions around project and design a database structure for comments system of quora?
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Q1. Basic HR round questions
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