Expora Database Consulting Services Software Development Engineer Interview Questions and Answers

• Q1. I am interested but I am fasher
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• Q2. I am interested but I am fasher
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They have 4 round total. In first round they take online Aptitide test in college labs.Aptitude topics are (Mcq on C,Java,C++ and quantitative aptitude,logical e.t.c), All rounds are Elimination round.

In 2nd Round they take coding test on your college systems.They don't have their plateform.You have to write code on any offline compiler.Coding question are based on linkedlist,array,string,hashmap only.They give 3 coding question if you solve 2 , you will be selected for next round.
Ques1: given an array of string and their frequency , find the string which have duplicate frequency.
Ques2: Find if an array contain any non empty subarray of zero sum in an array.
Ques 3: Find the string is isomorphic or Not.

• Q1. In 3rd Round they ask question form your preferred programming language,Sql queries and basic dsa question like find cycle in linked list.
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• Q2. What is Diff between static and final keyword in java
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• Q3. How hashmap internally worked
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• Q4. Find cycle in linkedlist
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• Q1. The 4th round is Technical+Hr, They asked question about your tech stack, project and they go deep in the concept so prepare accordingly.
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• Q2. What is diff between jvm, jre, jdk
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• Q3. What is Springboot rest api
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• Q4. What is polymorphism and interface , what is difference between interface and abstract class
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Assignment includes Aptitude, Reasoning, 1 Coding Question (Medium Level), 1 SQL Query based Q and an essay writing (3 essays in 15 minutes each of atleast 200 Words).

• Q1. Introduction and why not Java?
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• Q2. Tell about JDBC,JVM, JDK, JRE, Servlets etc. only a bit as i am not from java background.
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• Q3. Tell about OOPS in C++ (Static Keyword, 4 Pillars,Class vs Struct).
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• Q4. Code on online compiler for Overloading and overriding of functions.
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• Q5. 4 SQL Queries based on simple concepts and Syntax based Q on View, Alter, Create Db etc.
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• Q6. Eager to learn Java and why choose MongoDb.
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• Q1. Introduction about myself
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• Q2. What you know about the role
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• Q3. What you know about revature working and clients.
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• Q4. About salary structure and willing to relocate.
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• Q5. About siblings and fight with them
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• Q6. Will tell the results after 3 Weeks and that's it.
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In the coding test, there were 2 problems based on arrays and hashing (easy to medium level leetcode)

• Q1. Several OOP questions were asked.... like, Can we have a class inside an interface? Can we have a static constructor? Can we have multiple main methods?
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• Q2. DBMS question: Normalization questions and keys concepts.
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• Q1. DSA question (stack based) You have a stack full of numbers, you have to arrange them in ascending order in the same stack without using any other data structur...read more
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• Q2. OS and DBMS questions(sharding, semaphores, etc.)
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• Q1. Questions based on Consultadd principles.
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• Q1. A Lot of OOPS and Virtual concept
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• Q2. Basic SQL till joins
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• Q3. Java script medium
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• Q4. C# oops output based
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Dsa problems dp and tress problem

• Q1. Tell me about your self
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• Q2. Projects and intership
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