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Applied Materials SDE Interview Questions and Answers

Updated 10 Jun 2015

7 Interview questions

A SDE was asked
Q. What is the difference between an array and a linked list?
Ans. 

Array is a collection of elements stored in contiguous memory locations while linked list is a collection of nodes linked by pointers.

  • Arrays have fixed size while linked lists can grow or shrink dynamically

  • Insertion and deletion is faster in linked lists than arrays

  • Accessing elements in arrays is faster than linked lists

  • Arrays are better for random access while linked lists are better for sequential access

A SDE was asked
Q. Implement a stack using a linked list.
Ans. 

Implement a stack using a linked list

  • Create a Node class with data and next pointer

  • Create a Stack class with top pointer

  • Push new nodes to the top of the stack

  • Pop nodes from the top of the stack

  • Check if the stack is empty before popping

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A SDE was asked
Q. What is a BST?
Ans. 

BST stands for Binary Search Tree, a data structure used for efficient searching and sorting operations.

  • BST is a tree-like data structure where each node has at most two children.

  • The left child of a node contains a value less than the parent node, while the right child contains a value greater than the parent node.

  • BST allows for efficient searching and sorting operations with a time complexity of O(log n).

  • Examples...

A SDE was asked
Q. What data structure would you use for a dictionary?
Ans. 

An array of key-value pairs is the best data structure for a dictionary.

  • Use a hash table or a balanced tree to implement the dictionary.

  • Keys should be unique and immutable.

  • Values can be any data type.

  • Access time should be O(1) or O(log n) depending on the implementation.

  • Examples: Python's dict, Java's HashMap, C++'s unordered_map.

A SDE was asked
Q. Write a program to check if a tree is a BST.
Ans. 

Program to check if a binary tree is a BST

  • Traverse the tree in-order and check if the values are in ascending order

  • Use a min-max range for each node to check if it satisfies the BST property

  • Recursively check if the left and right subtrees are BSTs

A SDE was asked
Q. What are some practical applications of a linked list?
Ans. 

A linked list is used to store and manipulate a collection of data elements in a linear order.

  • Linked lists are commonly used in computer science for implementing data structures like stacks, queues, and hash tables.

  • They are also used in operating systems for managing memory allocation.

  • For example, a linked list can be used to implement a music playlist where each song is a node and the links between nodes represen...

Applied Materials HR Interview Questions

38 questions and answers

Q. How do you interact with other departments?
Q. What are your day-to-day activities?
Q. What are your team management skills?
A SDE was asked
Q. What is hashing? When is the time complexity of searching a hash table O(n)?
Ans. 

Hashing is a technique to map data to a fixed-size table. Time complexity of searching a hash table is O(n) in worst case.

  • Hashing is used to store and retrieve data quickly

  • It uses a hash function to map data to a fixed-size table

  • In the best case, searching a hash table takes O(1) time

  • In the worst case, all the data maps to the same index and searching takes O(n) time

  • Collision resolution techniques like chaining an...

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Applied Materials SDE Interview Experiences

1 interview found

SDE Interview Questions & Answers

user image Anonymous

posted on 5 Jun 2015

Interview Questionnaire 

9 Questions

  • Q1. Difference between an array and a linked list
  • Ans. 

    Array is a collection of elements stored in contiguous memory locations while linked list is a collection of nodes linked by pointers.

    • Arrays have fixed size while linked lists can grow or shrink dynamically

    • Insertion and deletion is faster in linked lists than arrays

    • Accessing elements in arrays is faster than linked lists

    • Arrays are better for random access while linked lists are better for sequential access

  • Answered by AI
  • Q2. What data structure would you use for a dictionary?
  • Ans. 

    An array of key-value pairs is the best data structure for a dictionary.

    • Use a hash table or a balanced tree to implement the dictionary.

    • Keys should be unique and immutable.

    • Values can be any data type.

    • Access time should be O(1) or O(log n) depending on the implementation.

    • Examples: Python's dict, Java's HashMap, C++'s unordered_map.

  • Answered by AI
  • Q3. What is hashing? When is the time complexity of searching a hash table O(n)?
  • Ans. 

    Hashing is a technique to map data to a fixed-size table. Time complexity of searching a hash table is O(n) in worst case.

    • Hashing is used to store and retrieve data quickly

    • It uses a hash function to map data to a fixed-size table

    • In the best case, searching a hash table takes O(1) time

    • In the worst case, all the data maps to the same index and searching takes O(n) time

    • Collision resolution techniques like chaining and ope...

  • Answered by AI
  • Q4. Practical application of a linked list
  • Q5. Implement a stack using a linked list
  • Ans. 

    Implement a stack using a linked list

    • Create a Node class with data and next pointer

    • Create a Stack class with top pointer

    • Push new nodes to the top of the stack

    • Pop nodes from the top of the stack

    • Check if the stack is empty before popping

  • Answered by AI
  • Q6. What is a BST?
  • Ans. 

    BST stands for Binary Search Tree, a data structure used for efficient searching and sorting operations.

    • BST is a tree-like data structure where each node has at most two children.

    • The left child of a node contains a value less than the parent node, while the right child contains a value greater than the parent node.

    • BST allows for efficient searching and sorting operations with a time complexity of O(log n).

    • Examples of a...

  • Answered by AI
  • Q7. Program to check if a tree is a BST
  • Q8. Puzzle - add mathematical operators to make all these expressions true-
  • Q9. Where do you see yourself 5 years from now and other HR stuff

Interview Preparation Tips

College Name: NA

Skills evaluated in this interview

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When HR’s Chinese English made me drop the interview!
So, I talked to the HR yesterday about the interview. I asked Please send me the location But their English… bro I was shocked! It was like talking to someone jisne english nahi kuch ar hi seekh liya ho, if the HR’s English is this I can only imagine the rest of the company I decided to drop the interview with this chinese english😶‍🌫️
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Interview questions from similar companies

SDE Interview Questions & Answers

Qualcomm user image Anonymous

posted on 4 Jun 2015

Interview Questionnaire 

8 Questions

  • Q1. How would you know .. your system is little endian or big endian??
  • Q2. How function pointers are shared across different processes? using which iPCs?
  • Ans. 

    Function pointers can be shared across processes using inter-process communication mechanisms like shared memory, pipes, sockets, etc.

    • Function pointers can be stored in shared memory regions that are accessible by multiple processes.

    • Processes can communicate with each other using pipes or sockets and pass function pointers as arguments.

    • Remote Procedure Call (RPC) mechanisms can also be used to share function pointers a...

  • Answered by AI
  • Q3. What is binder in android?
  • Ans. 

    Binder is a mechanism for inter-process communication in Android.

    • Binder allows different processes to communicate with each other.

    • It is used for implementing Android's IPC (Inter-Process Communication) system.

    • Binder uses a client-server model where the client sends requests to the server and the server responds with the requested data.

    • It is used for sharing data between different components of an Android application.

    • Bi...

  • Answered by AI
  • Q4. How sysctrl works?
  • Ans. 

    sysctrl is a system control utility used to manage system settings and configurations.

    • sysctrl is used to manage system settings and configurations such as network settings, power management, and hardware configurations.

    • It can be used to start, stop, and restart system services.

    • sysctrl is commonly used in Linux and Unix-based operating systems.

    • Examples of sysctrl commands include 'sysctrl -p' to reload all settings from...

  • Answered by AI
  • Q5. Explain device tree concepts in linux
  • Ans. 

    Device tree is a data structure used to describe hardware components in a system and their interconnections.

    • Device tree is used in embedded systems to provide a standardized way of describing hardware components.

    • It is written in a language called Device Tree Source (DTS) and compiled into a binary format called Device Tree Blob (DTB).

    • The device tree is loaded by the bootloader and used by the kernel to configure the ha...

  • Answered by AI
  • Q6. Mention 4 IPCs used in user level process in linux
  • Ans. 

    4 IPCs used in user level process in Linux

    • Message Queues - allows processes to exchange data through messages

    • Shared Memory - allows processes to share a portion of memory

    • Semaphores - used for synchronization between processes

    • Pipes - allows communication between two related processes

  • Answered by AI
  • Q7. How a function from one user process can be called in other user process?
  • Ans. 

    Inter-process communication mechanisms like pipes, sockets, message queues, shared memory can be used to call a function from one user process to another.

    • Use pipes to establish a unidirectional communication channel between two processes.

    • Use sockets to establish a bidirectional communication channel between two processes.

    • Use message queues to send messages between processes.

    • Use shared memory to share data between proce...

  • Answered by AI
  • Q8. Write a program with 2 threads. one thread should print even and other should print odd numbers in sequence. how would you make it SMP safe?
  • Ans. 

    Program with 2 threads printing even and odd numbers in sequence. How to make it SMP safe?

    • Use mutex locks to ensure only one thread accesses the shared resource (the number to be printed) at a time

    • Use condition variables to signal when it's safe for the other thread to access the shared resource

    • Use atomic variables to ensure that the shared resource is accessed atomically

    • Use thread-safe data structures to store the sha...

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: These are the few questions that i remember from my Qualcomm interview that i faced in march '13 :
#How would you know .. your system is little endian or big endian??
#how function pointers are shared across different processes? using which iPCs?
#what is binder in android?
#how sysctrl works?
#explain device tree concepts in linux.
#mention 4 IPCs used in user level process in linux.
#how a function from one user process can be called in other user process?
#write a program with 2 threads. one thread should print even and other should print odd numbers in sequence. how would you make it SMP safe?

College Name: NA

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

Medium difficulty level of questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Good

SDE Interview Questions & Answers

Qualcomm user image Anonymous

posted on 12 Dec 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Link list reversal
  • Q2. OS all concepts

SDE Interview Questions & Answers

Qualcomm user image Anonymous

posted on 9 Jan 2025

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Two-Sum Problem

I applied via Referral and was interviewed before Jun 2021. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. Bits manipulation questions
  • Q2. Basic linked list question
  • Q3. C conceptual questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Be good at CS fundamentals esp. OS, Architecture, C language and Cpp

I applied via Recruitment Consultant and was interviewed before May 2020. There were 3 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. DS and Algo questions based on DP and backtracking
  • Q2. Clone linked list with random pointers.
  • Ans. 

    Clone a linked list with random pointers.

    • Create a new node for each node in the original list.

    • Store the mapping between the original and cloned nodes in a hash table.

    • Traverse the original list again and set the random pointers in the cloned list using the hash table.

    • Return the head of the cloned list.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Mostly DS and Algo rounds followed by design rounds. Sometimes there can be language specific questions.

Skills evaluated in this interview

I appeared for an interview before May 2021.

Round 1 - Coding Test 

Round duration - 120 Minutes
Round difficulty - Medium

Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Easy

  • Q1. 

    Insertion Sort in a Linked List

    Given a singly linked list with 'N' nodes containing integer values, your task is to sort the list using insertion sort and output the sorted list.

    Insertion Sort is an al...

  • Ans. 

    Implement insertion sort algorithm on a singly linked list with integer values.

    • Traverse the linked list and for each node, find its correct position in the sorted list.

    • Remove the node from the original list and insert it at the correct position in the sorted list.

    • Repeat this process until all nodes are sorted.

    • Ensure the implementation is in-place, without using extra space.

    • Handle edge cases like empty list or single no...

  • Answered by AI
  • Q2. 

    Implement Stack with Linked List

    Your task is to implement a Stack data structure using a Singly Linked List.

    Explanation:

    Create a class named Stack which supports the following operations, each in O(1...

  • Ans. 

    Implement a Stack data structure using a Singly Linked List with operations in O(1) time.

    • Create a class named Stack with getSize, isEmpty, push, pop, and getTop methods.

    • Use a Singly Linked List to store the elements of the stack.

    • Ensure each operation runs in O(1) time complexity.

    • Handle cases where the stack is empty appropriately.

    • Implement the logic for each query type as specified in the input and output sections.

  • Answered by AI
  • Q3. 

    Prime Numbers within a Range

    Given an integer N, determine and print all the prime numbers between 2 and N, inclusive.

    Input:

    Integer N

    Output:

    Prime numbers printed on separate lines

    Example:

    Input...
  • Ans. 

    Generate and print all prime numbers between 2 and N, inclusive.

    • Iterate from 2 to N and check if each number is prime

    • Use a helper function to determine if a number is prime

    • Print each prime number on a new line

  • Answered by AI
Round 3 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Medium

This round was based on oops concepts and their applications and about STLs.

  • Q1. 

    Rectangular Numbers Pattern

    Given a number N, generate a pattern where the outer rectangle is filled with the number N, and the inner rectangles contain decreasing numbers down to 1.

    Input:

    The input be...
  • Ans. 

    Generate a rectangular pattern with outer rectangle filled with N and inner rectangles containing decreasing numbers.

    • Create a 2-D array with dimensions based on input N

    • Fill the outer rectangle with N and inner rectangles with decreasing numbers down to 1

    • Adjust the values in the inner rectangles based on the layer number

    • Return the generated pattern as a 2-D list/array

  • Answered by AI
Round 4 - HR 

Round duration - 30 Minutes
Round difficulty - Easy

This around was basically to judge my communication and behavioral skills.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as Software Engineer in BangaloreEligibility criteria7 CGPAQualcomm interview preparation:Topics to prepare for the interview - Standard template libraries, Data Structures, Algorithm, Pointers, Dynamic ProgrammingTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

Tip 1 : Basics should be very clear related to DSA.
Tip 2 : Good knowledge of OS will be plus for Qualcomm
Tip 3 : One should revise the college project thoroughly before interview.

Application resume tips for other job seekers

Tip 1 : Be brief while writing resume.
Tip 2 : Mention atleast 2 projects.

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview in Feb 2017.

Interview Questionnaire 

7 Questions

  • Q1. What is a malloc function and where is it used and how is it different from new?
  • Ans. 

    malloc is a function in C that dynamically allocates memory on the heap. It is used to allocate memory for variables or data structures.

    • malloc is used in C programming language.

    • It is used to allocate memory on the heap.

    • malloc is different from 'new' in C++ as it does not call constructors for objects.

  • Answered by AI
  • Q2. What is the difference between C++ and Objective C and where will you use it?
  • Ans. 

    C++ is a general-purpose programming language while Objective C is a superset of C used for iOS and macOS development.

    • C++ is widely used for developing applications, games, and system software.

    • Objective C is mainly used for iOS and macOS development.

    • C++ supports both procedural and object-oriented programming paradigms.

    • Objective C is an object-oriented language with dynamic runtime features.

    • C++ has a larger community a...

  • Answered by AI
  • Q3. What is the difference between class container and class composition?
  • Ans. 

    Class container is a class that holds objects of other classes, while class composition is a way to combine multiple classes to create a new class.

    • Class container holds objects of other classes, acting as a collection or container.

    • Class composition combines multiple classes to create a new class with its own behavior and attributes.

    • In class container, the objects are typically stored in a data structure like an array o...

  • Answered by AI
  • Q4. There are fifteen horses and a racing track that can run five horses at a time. You have to figure out the top 3 horses out of those and you don't have any timer machine to measure. How will you find the t...
  • Ans. 

    Divide the horses into groups of 5 and race them. Take the top 2 from each race and race them again. Finally, race the top 2 horses to determine the top 3.

    • Divide the horses into 3 groups of 5 and race them.

    • Take the top 2 horses from each race and race them again.

    • Finally, race the top 2 horses to determine the top 3.

  • Answered by AI
  • Q5. What is the most difficult problem that you have solved (during work) till now and why you think you could do so?
  • Ans. 

    Developing a real-time data processing system for a high-traffic e-commerce website

    • Implemented a distributed system architecture to handle large volumes of data

    • Optimized algorithms for efficient data processing and storage

    • Utilized caching mechanisms to improve system performance

    • Worked closely with cross-functional teams to troubleshoot and resolve issues

    • Example: Successfully reduced data processing time by 50% by imple...

  • Answered by AI
  • Q6. Why you want to change your current job?
  • Q7. What is the width of a tree? How will you calculate the width of the tree?
  • Ans. 

    The width of a tree is the maximum number of nodes at any level in the tree.

    • To calculate the width of a tree, we can perform a level order traversal and keep track of the maximum number of nodes at any level.

    • We can use a queue data structure to perform the level order traversal.

    • At each level, we count the number of nodes in the queue and update the maximum width if necessary.

  • Answered by AI

Interview Preparation Tips

Skills: Basic C/C++, Implementing Data Structures In C++

Skills evaluated in this interview

I appeared for an interview in Aug 2017.

Interview Preparation Tips

Round: Test
Duration: 1 hour 30 minutes
Total Questions: 60

Round: Technical Interview
Experience: Questions about DS , CN and basic resume

Round: Technical Interview
Experience: Questions about RT OS and memory mapping. And other operating system related questions.
Projects done so far.

Applied Materials Interview FAQs

What are the top questions asked in Applied Materials SDE interview?

Some of the top questions asked at the Applied Materials SDE interview -

  1. What is hashing? When is the time complexity of searching a hash table O(...read more
  2. What data structure would you use for a dictiona...read more
  3. Puzzle - add mathematical operators to make all these expressions tr...read more

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