Engineers Mech Quality Assurance Engineer Interview Questions and Answers

Q1. Reverse a string
Ans. 
Reversing a string involves rearranging its characters in the opposite order, which can be done using various methods in programming.
• Use built-in functions: In Python, you can reverse a string using slicing: `reversed_string = original_string[::-1]`.

• Iterative approach: Loop through the string from the end to the beginning and build a new string.

• Using recursion: Define a function that calls itself with a substring until...read more
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Q2. Remove duplicates from an array
Ans. 
Remove duplicates from an array of strings efficiently using various methods.
• Use a Set: Convert the array to a Set to automatically remove duplicates. Example: `const uniqueArray = [...new Set(array)];`

• Filter Method: Use the filter method to keep only unique elements. Example: `const uniqueArray = array.filter((item, index) => array.indexOf(item) === index);`

• Reduce Method: Use reduce to build a new array with unique...read more
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Basic aptitude questions not so difficult

Q1. Why you want to join this organisation
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Q2. Where do you see yourself after 5 yrs
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Round duration - 40 minutes
Round difficulty - Easy

Q1. 
Count Subsequences Problem Statement
Given an integer array ARR of size N, your task is to find the total number of subsequences in which all elements are equal.
Explanation:
A subsequence of an array i...read more
Ans. 
Count the total number of subsequences in which all elements are equal in an integer array.
• Iterate through the array and count the frequency of each element.

• Calculate the total number of subsequences for each element using the formula (frequency * (frequency + 1) / 2).

• Sum up the total number of subsequences for all elements and return the result modulo 10^9 + 7.
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