Specialization Track

Data Science & Analytics Interview Questions & Answers

Statistical modeling, hypothesis testing, feature engineering, SQL data pipelines, and exploratory data analysis.

Medium 6 views

How would you design an A/B test for a new signup page?

Define the primary outcome, meaningful effect size, guardrail metrics, randomization unit, and planned duration before launch. Randomize eligible users consistently, avoid counting repeated visits as ...

Verified Model Solution View Full Answer

Easy 5 views

What questions should you ask before filling missing values in a dataset?

Ask what each missing value means, how it was recorded, and whether absence is related to the outcome or another variable. A missing purchase amount might mean a failed data transfer, an unavailable m...

Verified Model Solution View Full Answer

Medium 5 views

Why can an overall conversion rate improve while conversion falls in every major segment?

This can happen when the mix shifts toward segments with higher baseline conversion, an example of Simpson’s paradox. Suppose both mobile and desktop conversion decline, but a larger share of traffic ...

Verified Model Solution View Full Answer

Medium 4 views

Two datasets disagree about active customers. How would you reconcile them?

Agree on a precise definition of active customer, including date window, timezone, account status, and treatment of trials or deleted accounts. Compare source lineage, refresh times, identity mappings...

Verified Model Solution View Full Answer

Easy 3 views

How do mean and median behave differently when salaries contain extreme values?

The mean uses every value and can move substantially when a few salaries are very high. The median is the middle ordered value and is less sensitive to those extremes. For a highly skewed salary distr...

Verified Model Solution View Full Answer

Medium 2 views

A dashboard shows revenue rose 20%. What would you check before calling it business growth?

Verify the revenue definition, currency conversion, reporting timezone, returns, taxes, and whether the period is complete. Compare equivalent periods and account for seasonality, acquisitions, price ...

Verified Model Solution View Full Answer

Other Categories

Software Engineering & OOP 8 AI & Machine Learning 12 Data Structures & Algorithms 11 IT Staffing & Recruitment 9 JavaScript & Web Technologies 7 Cybersecurity & InfoSec 7 Python Programming 13 Data Science & Analytics 6 Java 18 Full Stack Web Development 13 SQL & Relational Databases 12 Computer Networks & OS 13 Cloud & DevOps Engineering 6 HR Interview 14 Data Science & Machine Learning 6 General 21 .NET 12 C++ and C 18 Networking 11 Windows 11 Unix / Linux 17 Visual Basic 8 Hardware 13 Database 9 Testing 19 Web Development 12 x86 13 Designing 6 Programming 2 Marketing 1 BPO 3 Customer Support 0 Technical Support 1 CCNA 3 Aptitude 1 FAQ 19 Engineering 3 Manufacturing 2 Backend 0

Practice Placement MCQs

Test your aptitude, quantitative reasoning, and core programming skills under timed conditions.

Start Placement Test