Junior Research and Development Engineer Interview Questions and Answers

Divide an array into three subarrays that each sum to a specified target value.

• Identify the target sum for each subarray.

• Use a loop to iterate through the main array.

• Maintain a temporary sum and a counter for subarrays.

• Example: For array [1, 2, 3, 4, 5, 6] and target 6, possible subarrays are [1, 2, 3], [4, 2], [6].

• Ensure that the total sum of the original array equals the sum of the three target values.

This problem involves finding combinations of items to achieve a target value, similar to the coin change problem.

• Define the problem: Given an array of denominations and a target amount, find the number of ways to make that amount.

• Use dynamic programming to build a table where each entry represents the number of ways to achieve that amount.

• Base case: There is one way to make the amount 0 (using no coins).

• Iterate through each denomination and update the table for all amounts f...read more

The program should count the occurrence of each character in the given string and print the character along with its count.

• Create a dictionary to store the count of each character in the string.

• Iterate through the string and update the count of each character in the dictionary.

• Iterate through the string again and print each character along with its count from the dictionary.

Check if a string is a rotation of another string.

• Concatenate the first string with itself and check if the second string is a substring of the concatenated string.

• If the length of the strings is not equal, return false.

• If the strings are identical, return true.

• Example: 'waterbottle' is a rotation of 'erbottlewat'.

Manufacturing processes are the steps through which raw materials are transformed into finished products.

• Manufacturing processes involve a series of steps such as casting, molding, machining, welding, and assembly.

• Each process is designed to achieve specific goals like shaping, joining, or finishing the product.

• Examples include injection molding for plastic parts, CNC machining for precision components, and welding for joining metal pieces.

GD&T stands for Geometric Dimensioning and Tolerancing. It is a system for defining and communicating engineering tolerances.

• GD&T is used to specify the allowable variations in form, size, and orientation of part features.

• It helps ensure that parts fit together properly and function as intended.

• GD&T uses symbols, such as concentricity, perpendicularity, and flatness, to communicate tolerances.

• It is commonly used in industries such as automotive, aerospace, and manufacturing.

• G...read more