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100+ Cadence Design Systems Interview Questions and Answers

Updated 15 Jan 2025
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Q101. Check if two stacks are equal

Ans.

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

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Q102. References in C++

Ans.

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; }

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Cadence Design Systems Interview Questions and Answers for Freshers
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Q103. draw the output waveforms

Ans.

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

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Q104. Difference between sanity and smoke

Ans.

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

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Q105. Insert a node in a Linked List

Ans.

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

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Q106. find shortest path in graph

Ans.

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

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Q107. design a up counter circuit

Ans.

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

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Q108. How to avoid lu

Ans.

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

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Q109. Explain task and functions?

Ans.

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

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Q110. Add two linked list

Ans.

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.

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Q111. check tree is BST

Ans.

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

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Q112. describe virtual functions

Ans.

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

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Q113. Reverse an array

Ans.

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

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Q114. Create a Linked List

Ans.

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

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Q115. write a FIFO checker

Ans.

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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