Wafer Space Senior Design Engineer Interview Questions and Answers

First Round was pretty basic and coding questions was medium in Python and React.
Then coding assignment from client and then Manager Round followed by HR Round

Virtual round for fundamental coding.

Physical round for coding assignment given on a paper.

Q1. How does twisted cable work? How to see CAN voltage levels on Oscilloscope?
Ans. 
Twisted cables reduce electromagnetic interference and CAN voltage levels can be observed using an oscilloscope.
• Twisted cables consist of pairs of wires twisted together to cancel out electromagnetic interference.

• The twisting helps maintain a consistent impedance, reducing signal degradation over distance.

• To see CAN voltage levels, connect the oscilloscope probes to the CAN High and CAN Low lines.

• Set the oscilloscope t...read more
Answered by AI
Add your answer
Q2. Swap the bits in a byte.
Add your answer
Q3. Why you want to join the company?
Add your answer
Q4. How soon you can join the company?
Add your answer

Q1. They asked about technical
Add your answer
Q2. Provide answers for the same
Add your answer

Q1. They asked about technical
Add your answer
Q2. Answers according to question
Add your answer

Q1. Some technical question on advanced java
Add your answer

Q1. Scenario based question design swiggy app on microservice architecture
Ans. 
Designing a microservice architecture for a food delivery app like Swiggy to enhance scalability and maintainability.
• User Service: Handles user registration, authentication, and profile management.

• Restaurant Service: Manages restaurant listings, menus, and availability.

• Order Service: Processes orders, tracks status, and manages payments.

• Delivery Service: Coordinates delivery personnel and tracks delivery status.

• Notific...read more
Answered by AI
Add your answer

Q1. On python, on storage
Add your answer

Q1. On python , oops concept ,
Add your answer

Q1. Why you are changing the job
Add your answer

Duration: 1Hour 30 Minutes, 2 Coding Questions of Total 175 Marks. 1st Question has 75 marks and 2nd Question has 100 marks.

Q1. 1. Find the smallestMissingNumber in given array using Bitwise OR operation alone 2. Based on Array data Manipulation.
Ans. 
Using Bitwise OR operation to find the smallest missing number in an array.
• Iterate through the array and perform Bitwise OR operation with each element to set corresponding bit in a bitmask

• Iterate through the bitmask to find the first unset bit, which represents the smallest missing number

• Example: Array [0, 1, 3, 4, 6] would have a bitmask of 10101, smallest missing number is 2
Answered by AI
Add your answer
Q2. Q2: Customized Data Extraction From Given Dynamic Array & Perform Some Math Operations On the Extracted Data
Ans. 
Extract data from a dynamic array and perform mathematical operations on it.
• Identify the dynamic array structure, e.g., ['12', '15', '20'].

• Convert string elements to integers for mathematical operations.

• Perform operations like sum, average, or product on the extracted data.

• Example: For array ['2', '3', '5'], sum = 2 + 3 + 5 = 10.

• Use built-in functions like map() for conversion and reduce() for aggregation.
Answered by AI
Add your answer

Q1. Write a Pseudo code for given scenario?
Add your answer

Q1. System Design & Design Pattern based questions
Add your answer

Q1. Not Applicable (Yet to be scheduled)
Add your answer

Q1. Given a, b and target x, y , find if we can reach to x,y using a+b or a-b from a,b
Add your answer
Q2. This was a sliding window problem where need to get the max , so you are give a pos in the x axis and there are items kept and you need to collect the max .
Ans. 
Maximize item collection using a sliding window approach on a 1D axis.
• Identify the range of positions on the x-axis where items are located.

• Use two pointers to represent the current window of positions being considered.

• Expand the right pointer to include more items until the window exceeds the desired range.

• Contract the left pointer to reduce the window size while maintaining the maximum sum of items.

• Keep track of the ...read more
Answered by AI
Add your answer