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Yatra Interview Questions and Answers

Updated 9 Sep 2024

Q1. What are the types of data.

Ans.

Types of data include numerical, categorical, ordinal, and binary.

  • Numerical data includes continuous and discrete values, such as height and age.

  • Categorical data includes non-numeric values, such as colors and types of fruit.

  • Ordinal data includes values with a specific order, such as rankings and ratings.

  • Binary data includes only two possible values, such as true/false and yes/no.

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Q2. What is the difference between __proto__ and prototype

Ans.

The __proto__ is a property that points to the prototype of an object, while prototype is a property of a constructor function.

  • The __proto__ property is used to access the prototype of an object.

  • The prototype property is used to add properties and methods to a constructor function.

  • The __proto__ property is deprecated and should not be used in production code.

  • Changes to the prototype of a constructor function will affect all instances of that constructor function.

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Q3. what is the difference between where and having

Ans.

WHERE is used to filter rows before grouping or aggregating, while HAVING is used to filter groups after grouping or aggregating.

  • WHERE is used with SELECT, UPDATE, DELETE statements to filter rows based on a condition

  • HAVING is used with GROUP BY clause to filter groups based on a condition

  • WHERE is applied before the grouping operation, while HAVING is applied after the grouping operation

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Q4. Channels of acquisition & there ideal split

Ans.

The ideal split of acquisition channels depends on the target audience and budget.

  • The split should be based on the channels that have the highest ROI.

  • The target audience should be considered when deciding on the channels.

  • The budget should also be taken into account.

  • Examples of acquisition channels include social media, email marketing, SEO, PPC, and referral marketing.

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Q5. What is the difference between inner join and left join ?

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Q6. write a sql code for having

Ans.

SQL code for having clause

  • Use the HAVING clause to filter groups based on aggregate functions

  • It is used with the GROUP BY clause

  • Example: SELECT department, AVG(salary) FROM employees GROUP BY department HAVING AVG(salary) > 50000;

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