10+ Cadence Design Systems SDE-2 Interview Questions & Answers | Complete Prep Guide 2025

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SDE-2 Interview Questions & Answers

Anonymous

posted on 21 Mar 2022

I was interviewed in Sep 2021.

Round 1 - Video Call

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

Standard Data Structures and Algorithms round . One has to be fairly comfortable in solving algorithmic problems to pass this round with ease.

Q1.

Find All Pairs with Given Sum

Given an integer array arr and an integer Sum, count and return the total number of pairs in the array whose elements add up to the given Sum.

Input:

The first line contain...

Ans.

Count and return the total number of pairs in the array whose elements add up to a given sum.

Use a hashmap to store the frequency of each element in the array.
Iterate through the array and for each element, check if (Sum - current element) exists in the hashmap.
Increment the count of pairs if the complement exists in the hashmap.

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Q2.

Minimum Number of Jumps Problem

Given an array ARR of N integers, determine the minimum number of jumps required to reach the last index of the array (i.e., N - 1). From any index i, you can jump to an in...

Ans.

The problem involves finding the minimum number of jumps required to reach the last index of an array, where each element indicates the maximum distance that can be jumped from that position.

Use a greedy approach to keep track of the farthest reachable index and the current end of the jump.
Iterate through the array, updating the farthest reachable index and incrementing the jump count when necessary.
Return the jump cou...

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Round 2 - Video Call

(5 Questions)

Round duration - 70 minutes
Round difficulty - Medium

This round was preety intense and went for over 1 hour . I was asked 2 preety good coding questions (one was from Graphs and the other one was from DP) . After that I was grilled on my Computer Networks and Operating System concepts but luckily I was able to answer all the questions and the interviewer was also quite impressed.

Q1.

Two Teams (Check Whether Graph is Bipartite or Not)

Determine if a given undirected graph can be divided into exactly two disjoint cliques. Print 1 if possible, otherwise print 0.

Input:

The first line ...

Ans.

Check if a given undirected graph can be divided into exactly two disjoint cliques.

Create an adjacency list to represent the graph
Use BFS or DFS to check if the graph is bipartite
If the graph is bipartite, it can be divided into two disjoint cliques

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Q2.

Maximum Length Pair Chain Problem

You are provided with 'N' pairs of integers, where the first number in each pair is less than the second number, i.e., in pair (a, b) -> a < b. A pair chain is defi...

Ans.

Find the length of the longest pair chain that can be formed using the provided pairs.

Sort the pairs based on the second number in each pair.
Iterate through the sorted pairs and keep track of the maximum chain length.
Update the maximum chain length based on the conditions given in the problem statement.

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Q3. Can you explain the TCP/IP Protocol?

Ans.

TCP/IP is a set of rules governing the exchange of data over the internet.

TCP/IP stands for Transmission Control Protocol/Internet Protocol.
It is a suite of communication protocols used to connect devices on the internet.
TCP ensures that data is delivered reliably and in order, while IP handles the addressing and routing of data packets.
Examples of TCP/IP applications include web browsing (HTTP), email (SMTP), and file

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Q4. Can you explain the DHCP Protocol?

Ans.

DHCP Protocol is used to automatically assign IP addresses to devices on a network.

DHCP stands for Dynamic Host Configuration Protocol
It allows devices to obtain IP addresses and other network configuration information dynamically
DHCP servers assign IP addresses to devices for a specific lease period
DHCP uses a client-server model where the client requests an IP address and the server assigns one
DHCP uses UDP port 67 f

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Q5. What is meant by multitasking and multithreading in operating systems?

Ans.

Multitasking involves running multiple tasks concurrently, while multithreading allows multiple threads within a single process to run concurrently.

Multitasking allows multiple processes to run concurrently on a single processor, switching between them quickly.
Multithreading allows multiple threads within a single process to run concurrently, sharing resources like memory and CPU time.
Multitasking is at the process lev...

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Round 3 - Video Call

(4 Questions)

Round duration - 60 minutes
Round difficulty - Hard

This round majorly focused on past projects and experiences from my Resume and some standard System Design + LLD questions + some basic OOPS questions which a SDE-2 is expected to know .

Q1. How would you design a system like Pastebin?

Ans.

Design a system like Pastebin for sharing text snippets

Use a web application framework like Django or Flask for the backend
Store text snippets in a database like MySQL or MongoDB
Generate unique URLs for each snippet to share with others
Implement features like syntax highlighting, expiration time, and password protection
Consider implementing user accounts for managing and organizing snippets

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Q2. What is data abstraction and how can it be achieved?

Ans.

Data abstraction is the process of hiding implementation details and showing only the necessary features of an object.

Data abstraction can be achieved through classes and objects in object-oriented programming.
It involves creating a class with private data members and public methods to access and modify those data members.
By using data abstraction, users can interact with objects without needing to know the internal wo...

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Q3. What is the Diamond Problem in C++ and how can it be resolved?

Ans.

Diamond Problem is a common issue in multiple inheritance in C++ where a class inherits from two classes that have a common base class.

Diamond Problem occurs when a class inherits from two classes that have a common base class, leading to ambiguity in accessing members.
It can be resolved in C++ using virtual inheritance, where the common base class is inherited virtually to avoid duplicate copies of base class members.
...

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Q4. What are friend functions in C++?

Ans.

Friend functions in C++ are functions that are not members of a class but have access to its private and protected members.

Friend functions are declared inside a class with the keyword 'friend'.
They can access private and protected members of the class they are friends with.
Friend functions are not member functions of the class.
They can be standalone functions or functions of another class.
Example: friend void displayD

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Interview Preparation Tips

Eligibility criteriaAbove 2 years of experienceCadence Design Systems interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

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Software Developer Interview Questions & Answers

Mentor Graphics

Anonymous

posted on 10 May 2015

Interview Questionnaire

9 Questions

Q1. Questions related to the work done at my previous company

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Q2. Find if a given directed graph is cyclic or not

Ans.

To check if a directed graph is cyclic or not

Use Depth First Search (DFS) algorithm to traverse the graph
Maintain a visited set to keep track of visited nodes
Maintain a recursion stack to keep track of nodes in the current DFS traversal
If a node is visited and is already in the recursion stack, then the graph is cyclic
If DFS traversal completes without finding a cycle, then the graph is acyclic

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Q3. You have a stream of bytes from which you can read one byte at a time. You only have enough space to store one byte. After processing those bytes, you have to return a random byte. Note: The probability of...

Ans.

Return a random byte from a stream of bytes with equal probability.

Create a variable to store the count of bytes read
Create a variable to store the current random byte
For each byte read, generate a random number between 0 and the count of bytes read
If the random number is 0, store the current byte as the random byte
Return the random byte

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Q4. Find if a given Binary Tree is BST or not

Ans.

Check if a binary tree is a binary search tree or not.

Traverse the tree in-order and check if the values are in ascending order.
For each node, check if its value is greater than the maximum value of its left subtree and less than the minimum value of its right subtree.
Use recursion to check if all nodes in the tree satisfy the above condition.

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Q5. Devise an algorithm to determine the Nth-to-Last element in a singly linked list of unknown length. If N = 0, then your algorithm must return the last element. You should parse the list only once

Ans.

Algorithm to find Nth-to-Last element in a singly linked list of unknown length

Traverse the list and maintain two pointers, one at the beginning and one at Nth node from beginning
Move both pointers simultaneously until the second pointer reaches the end of the list
The first pointer will be pointing to the Nth-to-Last element
If N=0, return the last element
Parse the list only once

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Q6. Given an array of integers, print all possible permutations. Also explain your approach

Ans.

Print all possible permutations of an array of integers

Use recursion to swap elements and generate permutations
Start with the first element and swap it with each subsequent element
Repeat the process for the remaining elements
Stop when all elements have been swapped with the first element
Print each permutation as it is generated

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Q7. Design a Stack DS that also prints in O(1) the minimum element you pushed in the stack

Ans.

Design a stack that prints the minimum element pushed in O(1)

Use two stacks, one for storing elements and another for storing minimums
When pushing an element, compare it with the top of minimum stack and push the smaller one
When popping an element, pop from both stacks
To get the minimum element, just return the top of minimum stack

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Q8. Given a linked list with loop, how would you find the starting point of the loop ?

Ans.

To find the starting point of a loop in a linked list, use Floyd's cycle-finding algorithm.

Use two pointers, one moving at twice the speed of the other.
When they meet, move one pointer to the head of the list and keep the other at the meeting point.
Move both pointers one step at a time until they meet again, which is the starting point of the loop.

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Q9. Find a number a matrix mat[m][n] where all the rows and columns are sorted non-decreasingly. What will be the complexity of the solution

Ans.

To find a number in a matrix where all rows and columns are sorted non-decreasingly. Complexity of the solution.

Use binary search to find the number in each row and column
Start from the top-right corner or bottom-left corner to optimize search
Time complexity: O(m log n) or O(n log m) depending on the starting corner

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