10+ Analytics Vidhya Interview Questions and Answers

Sample interview questions for Software Engineer position

• Spring vs Spring Boot

• Singleton class in Java

• Marker interface

• Concurrent Hash Map

• Performance issues in SQL/Oracle

• Mapping in Hibernate ORM

• Spring Boot application execution

• Difference between PUT and POST methods

• Authentication in Java application

• Controller class structure in notepad

• Scope of Spring bean

• URL structure and parts

• Difference between Java and JavaScript

• Application execution control flow

• Design patterns in Java

Shell scripting for find and replace, adding index to lines, multithreading, hashmap vs hashtable, stack vs queue

• Use sed command for find and replace in shell scripting

• Use awk command to add an index at the beginning of each line in a file

• Multithreading is the ability of a CPU to execute multiple threads concurrently

• Single threaded means only one thread is executed at a time, while multithreaded allows multiple threads to run simultaneously

• HashMap allows null values and keys,...read more

Yes, I have experience with Junit, SQL and NoSQL databases, Kafka, Dockerization, Java 8 features, stream() operations, and shell scripting in Unix.

• I have used Junit for unit testing in Java projects.

• SQL databases are relational databases that use structured query language for data manipulation, while NoSQL databases are non-relational databases that provide flexible schema design and horizontal scalability.

• I have worked with Kafka for real-time data streaming and processing....read more

The most complex SQL query involved nested queries for data manipulation. Used inner join. Implemented hashset and avoided trees due to their drawbacks.

• Nested SQL query used for complex data manipulation

• Inner join used for combining data from multiple tables

• Implemented hashset for efficient data storage and retrieval

• Avoided trees due to their drawbacks such as unbalanced structure and slower traversal times

Interview questions for Software Engineer position

• GDP is not relevant to the Software Engineer position

• Java 8 features include lambda expressions, streams, and default methods

• Java code snippet: use a HashMap to count occurrences of each number

• Functional programming code: use forEach or map method to iterate over list

Iterate through each character in the array of strings and keep track of the frequency of each character. Return the character with the maximum frequency.

• Create a dictionary to store the frequency of each character

• Iterate through each string in the array and then through each character in the string

• Update the frequency count of each character in the dictionary

• Return the character with the maximum frequency

Decisions in current project are made through team collaboration and considering project requirements. App architecture is decided based on scalability, performance, and maintainability.

• Decisions are made through team collaboration and discussions

• Consideration of project requirements and goals

• App architecture is decided based on scalability, performance, and maintainability

• Use of design patterns and best practices to guide architecture decisions

Join two tables on a key column using SQL

• Use the JOIN keyword followed by the name of the second table

• Specify the key column in both tables using the ON keyword

• Choose the type of join (INNER, LEFT, RIGHT, FULL) based on your requirement

Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.

• Declare variables for first two numbers of the series

• Use a loop to generate the series by adding the previous two numbers

• Store the series in an array or print each number as it is generated