Lam Research Graduate Engineer Interview Questions and Answers

Practice on hackerrank, they send hackerrank link for screening round.

Q1. C, os, embedded questions
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Q1. C, data structures,os
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Q1. Previous jobs, salary discussion, relocation
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Q1. Find the length of longest common subsequence in given strings.
Ans. 
The length of the longest common subsequence in given strings is found using dynamic programming.
• Use dynamic programming to find the length of the longest common subsequence.

• Compare characters of the strings and build a matrix to store the lengths of common subsequences.

• Traverse the matrix to find the length of the longest common subsequence.
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Q2. A basic DFS based graph question.
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Write the algorithm for topological sorting.

Q1. Basic system design questions.
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Q2. Explain CAP theorem.
Ans. 
CAP theorem states that in a distributed system, it is impossible to simultaneously guarantee consistency, availability, and partition tolerance.
• Consistency: All nodes in the system have the same data at the same time.

• Availability: Every request gets a response, even if some nodes are down.

• Partition Tolerance: The system continues to operate despite network partitions.

• In a distributed system, you can only achieve two o...read more
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Q1. Explain your previous projects .
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Q1. What is VLSI design cycle ?
Ans. 
VLSI design cycle is the process of creating integrated circuits by going through various stages from design to fabrication.
• VLSI design cycle involves stages like specification, design, verification, synthesis, and fabrication.

• It starts with defining the requirements and specifications of the integrated circuit.

• Design phase includes logic design, circuit design, and physical design.

• Verification ensures that the design ...read more
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Q2. FIFO Pipeline depth calculation
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Q1. Verilog code debug question
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Q1. Modem related like Tx power LNA camping issues debug Few data scenarios
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1. Reverse a singly linked list
2. Kadane Algorithm

Q1. Asked about my previous company and projects I worked on. In depth discussion on my resume. Questions on OS fundamentals.
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Q1. In depth discussion on the projects I previously worked on. Write code to explain race condition in OS. Few puzzles and numerical were given to test my analytical skills.
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Q1. Final Round with Senior Manager, testing me on all parameters aptitude, tech stack, past experience and interest in the role.
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