Cadence Design Systems Software Engineer Intern Interview Questions and Answers

Round duration - 45 minutes
Round difficulty - Medium

Its a zoom call interview which lasted for 45 minutes. initially there are two panel members in which one is very targetting at me. They asked me different type of questions like jumping from DSA to project then to python then again java. Its a mixed combo pack type interview. for each and every question they asked me the real time example. The discussion on my project lasted for 15-20 mins.

Q1. 
Count Set Bits Problem Statement
Given a positive integer N, compute the total number of '1's in the binary representation of all numbers from 1 to N. Return this count modulo 1e9+7 because the result can...read more
Ans. 
Count the total number of set bits in the binary representation of numbers from 1 to N modulo 1e9+7.
• Use bitwise operations to count the set bits in each number from 1 to N.

• Keep track of the total set bits and return the result modulo 1e9+7.

• Optimize the solution to handle large values of N efficiently.

• Consider using dynamic programming or precomputing values for faster computation.
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Round duration - 30 mins
Round difficulty - Easy

This round was a zoom interview. The interview started with my brief introduction. This time the interview was more interested in my hobbies and passions. He asked me what do you do to keep yourself updated with the latest technology trends?

Binary Search

Q1. Design Round to desgin traffic signal design
Ans. 
Design a traffic signal system
• Identify the number of lanes and directions

• Determine the duration of each signal phase

• Consider pedestrian crossings and emergency vehicle prioritization

• Implement sensors to detect traffic flow

• Use machine learning algorithms to optimize signal timing
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Round duration - 90 Minutes
Round difficulty - Medium

The timing was from 4:30 pm to 6 pm, so it was quite convenient. The platform was good, the only problem I had was while attempting diagram based questions, as the interface was difficult to understand. The test had three types of questions- MCQ, subjective and diagram based. The major topics from which the question were asked were- sequential circuits(sequence detector), static timing analysis, digital design and computer architecture.

Q1. 
City of Happy People Problem Statement
Imagine a city where the happiness of each resident is described by a numerical value. Ninja, who is visiting this city, is interested in forming groups of people su...read more
Ans. 
The problem is to find the number of ways to form a group of people such that the overall happiness of the group falls within a given range.
• Iterate through all possible subsets of the given array/list

• Calculate the sum of happiness values for each subset

• Count the number of subsets whose sum falls within the given range
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Round duration - 60 Minutes
Round difficulty - Medium

The timing for my interview was 9:30 pm and it went on for an hour. They asked me thorough questions from majorly two topics- CMOS and Digital System Design. Even if I was not able to answer certain questions,, they were happy to drop hints and then observed how I went further with the solution.

Q1. 
Wildcard Pattern Matching Problem Statement
Implement a wildcard pattern matching algorithm to determine if a given wildcard pattern matches a text string completely.
The wildcard pattern may include the...read more
Ans. 
The task is to implement a wildcard pattern matching algorithm that checks if a given wildcard pattern matches a given text.
• The wildcard pattern can include the characters '?' and '*'

• '?' matches any single character

• '*' matches any sequence of characters (sequence can be of length 0 or more)

• The matching should cover the entire text, not partial text

• Implement a function that takes the wildcard pattern and the text as inp...read more
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