Element14 Interview Questions and Answers

I have over three years of experience in customer service, focusing on problem-solving and enhancing customer satisfaction.

• Worked at XYZ Corp, handling customer inquiries and resolving issues efficiently.

• Implemented a feedback system that improved service response time by 20%.

• Trained new staff on customer service protocols, enhancing team performance.

• Received 'Employee of the Month' for outstanding customer servic...read more

Data cleaning in Python involves removing inaccuracies, handling missing values, and ensuring consistency for analysis.

• Use pandas library for data manipulation: `import pandas as pd`.

• Handle missing values with `df.fillna(value)` or `df.dropna()`.

• Remove duplicates using `df.drop_duplicates()`.

• Convert data types with `df['column'] = df['column'].astype('type')`.

• Standardize text data with `df['column'] = df['column']...read more

Use the ORDER BY and LIMIT clauses to get the 2nd highest value in SQL.

• Use ORDER BY clause to sort the values in descending order

• Use LIMIT 1,1 to get the second row after skipping the first row

Types of joins in SQL include inner join, outer join, left join, right join, and full join.

• Inner join: Returns rows when there is a match in both tables

• Outer join: Returns all rows when there is a match in one of the 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 join: Retu...read more

Using if, vlookup, sumif for data cleaning and proper function in Excel

• Use IF function to create conditional statements for data cleaning

• Use VLOOKUP function to search for a value in a table and return a corresponding value

• Use SUMIF function to sum values based on a specific condition

• Exercise: Use IF function to categorize data into different groups based on a condition

• Exercise: Use VLOOKUP function to retrieve em...read more

Technical Support Engineer interview questions on CMRR, MOSFET, DC-DC converters, PWM, ferrite core, full bridge converter, SMPS transformer designing, and circuit breaker curves.

• CMRR stands for Common Mode Rejection Ratio and is a measure of how well a differential amplifier can reject common-mode noise.

• The main parameters to select a MOSFET as a switching device are its maximum voltage rating, maximum current ra...read more

The question asks for 3 types of scenarios in customer service.

• Handling a customer complaint

• Assisting a customer with a product inquiry

• Resolving a billing issue