Lam Research Associate Interview Questions and Answers

Q1. Linked list middle node, bit manipulation
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Q2. Wireless questions
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Q1. Why do we want to hire you?
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Aptitude and Logical Reasoning - 15MCQ's in 20min
Programming - 10MCQ's in 15min
Technical - 25MCQ's in 30min
Coding - 2qns in 45min

Q1. SQL queries - Joins, specific data retrieval
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Q2. OOP concepts with example code
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OOP concepts involve encapsulation, inheritance, and polymorphism in object-oriented programming.
• Encapsulation: bundling data and methods that operate on the data into a single unit (class). Example: class Car { private String color; public void setColor(String c) { color = c; } }

• Inheritance: creating new classes based on existing classes, inheriting their attributes and methods. Example: class SUV extends Car { privat...read more
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Q3. String questions, swapping two numbers
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Q1. Situation based questions
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Q1. Questions about UVm
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Q1. Technical Questions on Previous company work role. Basic electrical. About PLC Troubleshooting.
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Q2. On which plc's you work What idea about machines
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I have worked on Allen Bradley, Siemens, and Mitsubishi PLCs. I have a good understanding of machines and their operations.
• I have experience working with Allen Bradley, Siemens, and Mitsubishi PLCs

• I have a good understanding of how machines operate and their components

• I am familiar with programming languages such as ladder logic and structured text

• I have worked on various types of machines including conveyor systems, p
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Q3. About sensor,contractor, wiring
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Q4. What is know about TPM
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TPM stands for Total Productive Maintenance, a system that aims to maximize equipment effectiveness and minimize downtime.
• TPM involves all employees in the maintenance process

• It focuses on proactive maintenance to prevent breakdowns

• TPM aims to improve overall equipment effectiveness (OEE)

• It includes regular cleaning, inspection, and lubrication of equipment

• TPM also involves training employees on maintenance and safety
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Q5. About maintenance documentation
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Q6. How you handle manpower
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Q1. About the what is written in resume
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Q2. About electronic components
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Running stream median, priority queue, binary search, dp basic

Q1. Cycle in linked list
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A cycle in a linked list occurs when a node points to a previous node in the list, creating a loop.
• Check for a cycle using two pointers - one moving one node at a time and the other moving two nodes at a time.

• If the two pointers meet at any point, there is a cycle in the linked list.

• Example: 1 -> 2 -> 3 -> 4 -> 2 (points back to 2), this linked list has a cycle.
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Q2. Construct a tree from pre and post.
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Construct a tree from pre and post order traversal arrays.
• Start by creating a root node using the first element of the pre-order array.

• Find the index of the root node in the post-order array to divide it into left and right subtrees.

• Recursively build the left and right subtrees.

• Repeat the process for each subtree until the tree is fully constructed.
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More from leetcode medium core

Arithmetic Aptitude
Number Series
Profit and Loss
Data Interpretation

Q1. Most of the questions are from JAVA, SQl and Python Situational based questions Hobbies
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Q2. Garbage Collection in Java SQL queries
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Garbage collection in Java is an automatic process of freeing up memory by removing unused objects.
• Java uses a mark-and-sweep algorithm for garbage collection

• Objects that are no longer referenced by any part of the program are eligible for garbage collection

• System.gc() can be used to suggest garbage collection, but it is not guaranteed to run immediately

• Garbage collection can cause performance issues if not managed pro
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