
Cadence Design Systems


100+ Cadence Design Systems Interview Questions and Answers
Q101. Check if two stacks are equal
Check if two stacks are equal by comparing each element in the stacks
Pop elements from both stacks and compare them one by one
If the sizes of the stacks are different, they are not equal
If any element in the stacks is different, they are not equal
Q102. References in C++
References in C++ allow a variable to refer to another variable's memory address.
References are declared using the '&' symbol.
They are often used as function parameters to avoid copying large objects.
References cannot be null and cannot be reassigned to refer to a different object.
They are commonly used in operator overloading to modify the original object.
Example: int x = 5; int& y = x; y++; // x is now 6.
Example: void swap(int& a, int& b) { int temp = a; a = b; b = temp; }
Q103. draw the output waveforms
The output waveforms can be drawn based on the input signal and circuit configuration.
Understand the input signal characteristics (frequency, amplitude, etc.)
Analyze the circuit components and their effects on the signal
Draw the output waveform based on the input and circuit analysis
Q104. Difference between sanity and smoke
Sanity testing is a narrow and deep testing approach to check if the specific functionality is working fine after changes, while smoke testing is a broad and shallow testing approach to check if the software build is stable enough for further testing.
Sanity testing focuses on specific functionality, smoke testing checks overall stability
Sanity testing is usually performed after a specific change, smoke testing is performed after a build
Sanity testing is more detailed and spec...read more
Q105. Insert a node in a Linked List
To insert a node in a Linked List, update the next pointer of the new node to point to the current node's next, then update the current node's next pointer to the new node.
Create a new node with the desired value
Set the new node's next pointer to the current node's next
Update the current node's next pointer to the new node
Q106. find shortest path in graph
Use Dijkstra's algorithm to find the shortest path in a graph
Implement Dijkstra's algorithm to find the shortest path between two nodes in a graph
Maintain a priority queue to keep track of the shortest distance to each node
Update the shortest distance to each node as you traverse the graph
Track the path by storing the previous node for each node visited
Q107. design a up counter circuit
A up counter circuit is a digital circuit that counts upwards in binary sequence.
Use flip-flops to store the count value
Connect the output of one flip-flop to the clock input of the next flip-flop
Use logic gates to control the counting sequence
Add a reset input to clear the count when needed
Q108. How to avoid lu
To avoid lu, ensure proper ventilation and use personal protective equipment.
Ensure proper ventilation in work areas to prevent exposure to harmful substances
Use personal protective equipment such as masks, gloves, and goggles when working in hazardous environments
Follow safety protocols and guidelines provided by the company or regulatory agencies
Regularly monitor air quality and conduct risk assessments to identify potential hazards
Provide training to employees on the impor...read more
Q109. Explain task and functions?
Tasks and functions refer to the specific responsibilities and roles assigned to an individual within a job or project.
Tasks are specific actions or activities that need to be completed within a certain timeframe.
Functions are broader roles or responsibilities that encompass multiple tasks and contribute to the overall goal.
Examples of tasks include writing test cases, debugging code, and creating design specifications.
Examples of functions include leading a team, coordinatin...read more
Q110. Add two linked list
To add two linked lists, iterate through both lists simultaneously and add corresponding nodes, considering carry from previous addition.
Create a dummy node to hold the result.
Initialize current node to dummy node.
Iterate through both lists, adding values and carry from previous addition.
Move to next nodes in both lists.
Handle cases where one list is longer than the other.
Handle final carry if present.
Q111. check tree is BST
Check if a binary tree is a Binary Search Tree (BST)
Perform an in-order traversal of the tree and check if the resulting array is sorted
Keep track of the previous node value during traversal to compare with the current node value
Ensure that each node's value is greater than the previous node's value in the in-order traversal
Q112. describe virtual functions
Virtual functions allow a function to be overridden in a derived class, enabling polymorphic behavior.
Virtual functions are declared in a base class with the 'virtual' keyword.
They are meant to be overridden in derived classes to provide specific implementations.
When a virtual function is called through a base class pointer or reference, the actual function to be executed is determined at runtime based on the object's type.
Example: class Animal { virtual void makeSound() { co...read more
Q113. Reverse an array
Reverse an array of strings
Create a new array and iterate through the original array in reverse order, adding each element to the new array
Use built-in array methods like reverse() or spread operator for a more concise solution
Ensure to handle edge cases like empty array or null values
Q114. Create a Linked List
A linked list is a data structure where each element points to the next element in the sequence.
Create a Node class with data and next pointer
Initialize a head pointer to null
Add elements by creating new nodes and updating next pointers
Traverse the list by following next pointers
Q115. write a FIFO checker
A FIFO checker is a verification component used to monitor and validate the behavior of a First-In-First-Out buffer in a design.
Implement a monitor that tracks the input and output operations of the FIFO buffer
Check that the data is read out in the same order it was written in
Verify that the FIFO buffer does not overflow or underflow
Use assertions to flag any violations of FIFO behavior
Example: Monitor the write and read pointers of the FIFO buffer and compare them to ensure ...read more
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