Impact Analytics Interview Questions and Answers

Hackerrank coding test

Q1. Not sure exactly
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Q1. Not sure exactly
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Q1. Maneger interview, previous experience and 1 problem
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Q1. Typical behavioural interview
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Q1. Resultant rows for different SQL joins
Ans. 
Resultant rows for different SQL joins
• Inner join - returns rows that have matching values in both tables

• Left join - returns all rows from the left table and the matched rows from the right table

• Right join - returns all rows from the right table and the matched rows from the left table

• Full outer join - returns all rows when there is a match in either left or right table
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Q2. Group by and join SQL questions involving nulls
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Coding round had one SQL and one Python question. And some mcqs around python and math

Q1. It was on store and products querying with SQL
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Q2. Same questions were asked in Python
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Q1. It was a techno-managerial round with some guesstimates and about my recent projects
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There were 2 coding questions one is based on array and one more is based on abstraction

Q1. What is black box testing
Ans. 
Black box testing is a software testing method where the internal structure or code of the application is not known to the tester.
• Tester focuses on the functionality of the software without knowing its internal workings

• Tests are based on requirements and specifications

• Input data is provided and output is compared against expected results

• Examples include equivalence partitioning, boundary value analysis, and decision ta...read more
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Q2. What is regression testing
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Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.
• Regression testing is performed after code changes to verify that the existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Automated testing tools are often used for regression testing to save time and effort.

• Example...read more
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Q1. Advancement in HTML5 compared to HTML3
Ans. 
HTML5 introduced new features like semantic elements, audio/video support, canvas for graphics, local storage, and improved form controls compared to HTML3.
• HTML5 introduced semantic elements like <header>, <footer>, <nav>, <article>, <section> for better structure and SEO.

• HTML5 added native support for audio and video playback without the need for plugins.

• Canvas element in HTML5 allows for...read more
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Q2. Output based CSS positioning questions.
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Q3. Coding question on JavaScript related to flat array without using flat method
Ans. 
Flatten a nested array of strings without using the flat method in JavaScript.
• Use recursion to handle nested arrays. Example: `function flatten(arr) { return arr.reduce((acc, val) => Array.isArray(val) ? acc.concat(flatten(val)) : acc.concat(val), []); }`

• Utilize a loop to iterate through the array and check if each element is an array. Example: `for (let item of arr) { if (Array.isArray(item)) { // handle nested } }...read more
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Q4. React js coding question related to forward ref and imperative handle
Ans. 
React's forwardRef and useImperativeHandle allow components to expose methods to parent components.
• forwardRef allows you to pass a ref through a component to one of its children.

• useImperativeHandle customizes the instance value that is exposed to parent components when using ref.

• Example: Create a custom input component that focuses on itself when a method is called.

• Usage: const MyInput = React.forwardRef((props, ref) =...read more
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Q1. Portfolio round- asked to present your sample work.
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Q2. Live Design Challenge- Asked to replicate design using Figma while the interviewers observe.
Ans. 
Replicate a design in Figma while demonstrating design principles and techniques.
• Start by analyzing the original design for layout, colors, and typography.

• Use Figma's tools like frames, components, and styles for efficiency.

• Pay attention to spacing and alignment to maintain visual harmony.

• Utilize Figma's collaboration features to gather feedback in real-time.

• Consider accessibility by ensuring color contrast and font le...read more
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Unprofessional hiring process, no response after submitting a task despite multiple follow ups