ExcelR Data Science Trainee Interview Questions and Answers

Moderate good and easy for clear fundamentals

Q1. Why your interested
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Q2. Why you want to Jon
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Q1. The first round was a basic telephonic interview. Then simple basic SQL questions and some question based on Normalisation and DBMS were asked.
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Q1. This was the toughest Data Analyst Interview I have faced till now. Interview was of 1 hr. Required higher level of SQL understanding. Asked to share screen and then solve SQL queries. Question based on jo...read more
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Q1. Question based on Window Functions in sql
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Q2. Order of execution
Ans. 
Order of execution refers to the sequence in which operations are carried out in a program or system.
• Execution starts from the top of the program and moves downwards.

• Operations within parentheses are executed first.

• Multiplication and division are executed before addition and subtraction.

• Functions are executed when they are called.

• Control structures like loops and conditionals affect the order of execution.
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Q1. Write a sql query to find out different routes for a airline. Table has two columns which are destination and source
Ans. 
Use a SQL query to find different routes for an airline based on source and destination columns in a table.
• Use a SELECT statement to retrieve the distinct combinations of source and destination.

• Use the DISTINCT keyword to ensure only unique routes are returned.

• Order the results by source and destination for easier analysis.
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Q2. Situational questions based on Business KPI
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Q1. Simple discussion on the role and company culture
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Q1. Case study question
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Q1. Basic Discussion on relocation and interest in joining the company.
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Q1. Asked about the Statistics concepts hypothesis,pvalue,mean,meadian.mode,normaldistrubution?
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Q2. Sql joins questions based on three tables, complex joins
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Q1. Technical questions mostly around sql, project based and few theoretical questions on python
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Q1. This was one of the most grilled interview i have given, require moderate level of sql understanding, was asked to share screen and solve it , also i had show how it is working then basic questions of py...read more
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Q1. Was asked basic HR questions
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Questions on quant and maths

Related to collections

Advanced Java coding

Q1. Entire core Java arrays and strings
Ans. 
Core Java arrays and strings are fundamental data structures used for storing and manipulating data in Java programming.
• Arrays in Java are used to store multiple values of the same data type in a single variable.

• Strings in Java are objects that represent sequences of characters.

• Arrays and strings in Java are both indexed collections, with arrays being mutable and strings being immutable.

• Example: String[] names = {"Alic
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Q2. Java collections and Framework
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Q1. Some coding and framework
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Q2. REST assured and API
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