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KLA-Tencor Software Developer Interview Questions and Answers

Updated 4 May 2021

KLA-Tencor Software Developer Interview Experiences

1 interview found

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

Software Developer Jobs at KLA-Tencor

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Interview questions from similar companies

Interview Questionnaire 

9 Questions

  • Q1. Tree questions related like traversal?
  • Q2. Locate the sum of 2 numbers in a linear array (Unsorted and sorted) and their complexities
  • Ans. 

    Locate sum of 2 numbers in a linear array (unsorted and sorted) and their complexities

    • For unsorted array, use nested loops to compare each element with every other element until the sum is found

    • For sorted array, use two pointers approach starting from the beginning and end of the array and move them towards each other until the sum is found

    • Complexity for unsorted array is O(n^2) and for sorted array is O(n)

  • Answered by AI
  • Q3. Pointers with increment/decrement, address of and value at operators (++,–,*,&)
  • Ans. 

    Pointers are used to manipulate memory addresses and values in C++. Increment/decrement, address of and value at operators are commonly used.

    • Incrementing a pointer moves it to the next memory location of the same data type

    • Decrementing a pointer moves it to the previous memory location of the same data type

    • The address of operator (&) returns the memory address of a variable

    • The value at operator (*) returns the value sto

  • Answered by AI
  • Q4. A point and a rectangle is present with the given coordinates. How will you determine whether the point is inside or outside the rectangle?
  • Ans. 

    To determine if a point is inside or outside a rectangle, we check if the point's coordinates fall within the rectangle's boundaries.

    • Check if the point's x-coordinate is greater than the left edge of the rectangle

    • Check if the point's x-coordinate is less than the right edge of the rectangle

    • Check if the point's y-coordinate is greater than the top edge of the rectangle

    • Check if the point's y-coordinate is less than the b...

  • Answered by AI
  • Q5. There is a point inside the rectangle. How will you determine the line that passes through the point and divides the rectangle into 2 equal halves?
  • Ans. 

    To find line that divides rectangle into 2 equal halves through a point inside it.

    • Find the center of the rectangle

    • Draw a line from the center to the given point

    • Extend the line to the opposite side of the rectangle

    • The extended line will divide the rectangle into 2 equal halves

  • Answered by AI
  • Q6. There is a scheme which contains 8-bit and 16-bit signed numbers. How many such combinations are possible?
  • Ans. 

    There are multiple combinations of 8-bit and 16-bit signed numbers. How many such combinations are possible?

    • There are 2^8 (256) possible combinations of 8-bit signed numbers.

    • There are 2^16 (65,536) possible combinations of 16-bit signed numbers.

    • To find the total number of combinations, we can add the number of combinations of 8-bit and 16-bit signed numbers.

    • Therefore, the total number of possible combinations is 256 +

  • Answered by AI
  • Q7. You are given an array of elements. Some/all of them are duplicates. Find them in 0(n) time and 0(1) space. Property of inputs – Number are in the range of 1..n where n is the limit of the array
  • Ans. 

    Find duplicates in an array of elements in 0(n) time and 0(1) space.

    • Use the property of inputs to your advantage

    • Iterate through the array and mark elements as negative

    • If an element is already negative, it is a duplicate

    • Return all the negative elements as duplicates

  • Answered by AI
  • Q8. Given a array of digits. print all combination of of these i.e all no formed by these. repetition allowed. and then repetition not allowed example: i/p: arr={1,2,3} o/p: (without repetition) 123, 132, 213,...
  • Q9. Questions on project

Interview Preparation Tips

Round: Test
Duration: 90 minutes
Total Questions: 3

Round: HR Interview
Experience: HR interview was all about my projects, my background and a few more typical HR questions. It was pretty easy to answer them.

Skills: Algorithm, Data structure, C++
College Name: IIT ROORKEE

Skills evaluated in this interview

I was interviewed before May 2016.

Interview Preparation Tips

Round: written test
Experience: it was elitmus test conducted by the company itself on campus. As per my knowledge only those scoring 90 percentile got selected for round 2.
Tips: Attempt only those ques that are necessary for scoring 90+ in e litmus. Specially in verbal don't attempt more then required questions, though you might be tempted. The aim is not to score max bt to score 90+

Round: Technical Interview
Experience: This was a programming based round. I was asked to write algorithms for various array linked list based problems. There was cross questioning prompting to reduce complexity and to use different data structures for same problems.

Mostly it focused on subjects like c, data structures and ADA.
Tips: Be clear with basic of data structures and algorithms. Pointers, queue, stacks, array linked lists, sorting etc are the keywords.

Round: Technical Interview
Experience: This was a information security specific round since that was my major. In depth cross questioning on my thesis topics, honeypots, network intrusion etc. Security certificates, and on the go problems to provide security solution layer wise in different scenarios. Security concept of torrents was also asked in detail.
Tips: It was more of a security discussion and throwing of ideas about how things in a particular case could work or could not. Don't worry about right or wrong answer just be clear with your reasoning about the solution you are suggesting.

Round: Other Interview
Experience: I don't know what to name this round, but it focused mainly on developing test cases for an object. Say they gave me a stapler and said to develop a test plan listing down test cases for a given object to pass so that it can be confirmed that it is a stapler. Another scenario was with a lift.
Tips: This is one round where your presence of mind and inter personal skills matter. I think the way you present your thoughts was most important here.

Round: Behavioural Interview
Experience: This was was mostly about how would you react in a given professional situation
Like your assigned work could not be completed on time, or if you are doing something wrong with the work assigned.
Tips: This is all about inter personal skills and putting your best foot forward :)

College Name: Indira Gandhi Delhi Technical University For Women, Delhi

I was interviewed in Sep 2016.

Interview Preparation Tips

Round: Test
Experience: Questions aren't tough but they take more time to read itself.
Tips: First try to attempt the questions which are seemingly small. Reading bigger questions first and wasting more time on that isnt a good idea at all.
Duration: 30 minutes
Total Questions: 30

Skills: Technical Skill, Analytical Skills
College Name: IIT Kharagpur

I applied via Campus Placement

Interview Questionnaire 

4 Questions

  • Q1. What is a program, task and threads
  • Ans. 

    A program is a set of instructions that tells a computer what to do. A task is a unit of work performed by a program. A thread is a sequence of instructions within a task.

    • A program is a collection of instructions that are executed by a computer to perform a specific task.

    • A task is a unit of work that is performed by a program. It can be a specific action or a set of actions.

    • A thread is a sequence of instructions within...

  • Answered by AI
  • Q2. Delete a node in a linked list
  • Ans. 

    To delete a node in a linked list, we need to adjust the pointers of the previous and next nodes.

    • Find the node to be deleted by traversing the linked list

    • Adjust the pointers of the previous and next nodes to skip the node to be deleted

    • Free the memory occupied by the node to be deleted

  • Answered by AI
  • Q3. What is a function pointer and volatile type in c
  • Ans. 

    A function pointer is a variable that stores the address of a function. Volatile type is used to declare variables that can be modified by external factors.

    • Function pointers are used to pass functions as arguments to other functions.

    • Volatile type is used when a variable's value can be changed unexpectedly by external factors.

    • Function pointers can be used to implement callbacks or event handling mechanisms.

    • Volatile type...

  • Answered by AI
  • Q4. Summarise your resume
  • Ans. 

    Experienced software developer with expertise in Java, Python, and SQL

    • Proficient in Java, Python, and SQL programming languages

    • Developed web applications using Java Spring framework

    • Experience with database management and optimization using SQL

    • Worked on various software projects in a team environment

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Paper was challenging and It was well set.

Duration: 90 minutes
Total Questions: 60

Round: Technical Interview
Experience: It was a very good experience overall. Interviewer helped to ease the tension.
Tips: Waiting time can be reduced.

General Tips: Prepare for precedence of operators in C.
Try to be fast in solving the problems.
Skills: Knowledge Of Your Resume Points, Pointers In C, Operating System Basics
Duration: 2
College Name: IIT Madras
Motivation: Qualcomm is a

Skills evaluated in this interview

Interview Questionnaire 

5 Questions

  • Q1. In C programming they asked about storage classes, Volatile , Whole compilation process steps by steps, Dangling pointer , Memory leak, Memory corruption
  • Q2. In data structure they asked question on String , Linked List and array
  • Q3. Data structure question section is easy don't go for complex algorithms just study basic algorithms. like reverse the linked list in group on given size
  • Q4. They also asked question on bit manipulation. Like Check that given number binary representation is palindrome or not?
  • Q5. Swap even and odd bits in given number
  • Ans. 

    Swap even and odd bits in a given number

    • Create a mask for even bits and odd bits

    • Shift even bits to right and odd bits to left

    • Combine even and odd bits using bitwise OR operator

  • Answered by AI

Interview Preparation Tips

College Name: NA

Skills evaluated in this interview

I was interviewed before Apr 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 75 minutes
Round difficulty - Medium

This was an online coding round where I had 2 questions to solve under 75 minutes. Both the coding questions were of Medium to Hard level of difficulty.

  • Q1. 

    Smallest Window Problem Statement

    Given two strings, S and X, your task is to find the smallest substring in S that contains all the characters present in X.

    Example:

    Input:
    S = "abdd"
    X = "bd"
    Output:
    ...
  • Ans. 

    Find the smallest substring in S that contains all characters in X.

    • Use a sliding window approach to find the smallest substring in S that contains all characters in X.

    • Keep track of the characters in X using a hashmap.

    • Move the window by adjusting the start and end pointers until all characters in X are found.

    • Return the smallest substring encountered.

  • Answered by AI
  • Q2. 

    K - Sum Path In A Binary Tree

    Given a binary tree where each node contains an integer value, and a value 'K', your task is to find all the paths in the binary tree such that the sum of the node values in ...

  • Ans. 

    Find all paths in a binary tree where the sum of node values equals a given value 'K'.

    • Traverse the binary tree using DFS and keep track of the current path and its sum.

    • At each node, check if the current sum equals 'K' and add the path to the result.

    • Continue traversal to the left and right child nodes recursively.

    • Return the list of paths that sum up to 'K'.

  • Answered by AI
Round 2 - Video Call 

(4 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round had 2 questions of DS/Algo to solve under 60 minutes and 2 questions related to Operating Systems.

  • Q1. 

    Validate Partial Binary Search Tree (BST) Problem Statement

    You are provided with a binary tree containing 'N' nodes. Your task is to determine if this tree is a Partial Binary Search Tree (BST). Return t...

  • Ans. 

    Validate if a binary tree is a Partial Binary Search Tree (BST) by checking if each node's left subtree contains nodes with data less than or equal to the node's data, and each node's right subtree contains nodes with data greater than or equal to the node's data.

    • Check if each node's left subtree follows BST property (data <= node's data) and right subtree follows BST property (data >= node's data)

    • Recursively che...

  • Answered by AI
  • Q2. 

    Longest Increasing Subsequence Problem Statement

    Given an array of integers with 'N' elements, determine the length of the longest subsequence where each element is greater than the previous element. This...

  • Ans. 

    Find the length of the longest strictly increasing subsequence in an array of integers.

    • Use dynamic programming to solve this problem efficiently.

    • Initialize an array to store the length of the longest increasing subsequence ending at each index.

    • Iterate through the array and update the length of the longest increasing subsequence for each element.

    • Return the maximum value in the array as the result.

  • Answered by AI
  • Q3. Can you define process and threads in operating systems?
  • Ans. 

    Processes are instances of a program in execution, while threads are lightweight processes within a process.

    • A process is a program in execution, with its own memory space and resources.

    • Threads are lightweight processes within a process, sharing the same memory space and resources.

    • Processes are independent of each other, while threads within the same process can communicate and share data.

    • Example: A web browser running ...

  • Answered by AI
  • Q4. What are the different types of semaphores?
  • Ans. 

    Different types of semaphores include binary semaphores, counting semaphores, and mutex semaphores.

    • Binary semaphores: Can only have two states - 0 or 1. Used for mutual exclusion.

    • Counting semaphores: Can have multiple states. Used for managing resources with limited capacity.

    • Mutex semaphores: Similar to binary semaphores but with additional features like priority inheritance.

    • Named semaphores: Can be shared between proc...

  • Answered by AI
Round 3 - Video Call 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Hard

In this round, I was asked 3 coding questions out of which I had to implement the first two and for the last question I was only asked the optimal approach. The main challenge in this round was to implement the first two questions in a production ready manner without any bugs and so I had to spent some time thinking about some Edge Cases which were important with respect to the question.

  • Q1. 

    Next Greater Element Problem Statement

    You are given an array arr of length N. For each element in the array, find the next greater element (NGE) that appears to the right. If there is no such greater ele...

  • Ans. 

    The task is to find the next greater element for each element in an array to its right, if no greater element exists, return -1.

    • Use a stack to keep track of elements for which the next greater element is not found yet.

    • Iterate through the array from right to left and pop elements from the stack until a greater element is found.

    • Store the next greater element for each element in a separate array.

    • If the stack is empty afte...

  • Answered by AI
  • Q2. 

    Power Set Generation

    Given a sorted array of 'N' integers, your task is to generate the power set for this array. Each subset of this power set should be individually sorted.

    A power set of a set 'ARR' i...

  • Ans. 

    Generate power set of a sorted array of integers with individually sorted subsets.

    • Use recursion to generate all possible subsets by including or excluding each element in the array.

    • Sort each subset before adding it to the power set.

    • Handle base case when all elements have been considered to add the subset to the power set.

  • Answered by AI
  • Q3. 

    Counting Sort Problem Statement

    Ninja is learning about sorting algorithms, specifically those that do not rely on comparisons. Can you help Ninja implement the counting sort algorithm?

    Example:

    Input:
    ...
  • Ans. 

    Implement counting sort algorithm to sort an array of integers without comparisons.

    • Count the frequency of each element in the input array.

    • Create a prefix sum array to determine the position of each element in the sorted array.

    • Iterate through the input array and place each element in its correct position based on the prefix sum array.

    • Time complexity of counting sort is O(n+k), where n is the number of elements and k is

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPACadence Design Systems interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, OS, DBMS, 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.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

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.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test 

General aptitude questions

Round 2 - Coding Test 

Problem solving, solved 2 out of 3 questions

Round 3 - Group Discussion 

General topics were given in gd

Round 4 - Technical 

(2 Questions)

  • Q1. Programming concepts
  • Q2. Projects and coding round questions solved
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Referral and was interviewed before Nov 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Frog jump dp problem

Round 2 - Technical 

(2 Questions)

  • Q1. Microservices, Kubernetes
  • Q2. Rbac and access control
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I was interviewed in Aug 2023.

Round 1 - Technical 

(1 Question)

  • Q1. Question on merge sort
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KLA-Tencor Interview FAQs

How to prepare for KLA-Tencor Software Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at KLA-Tencor. The most common topics and skills that interviewers at KLA-Tencor expect are Application Development, Packaging, Chip Design, Process Control and Software Design.
What are the top questions asked in KLA-Tencor Software Developer interview?

Some of the top questions asked at the KLA-Tencor Software Developer interview -

  1. Clone linked list with random pointe...read more
  2. DS and Algo questions based on DP and backtrack...read more

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