Qualcomm Interview Questions, Process, and Tips

Q1. Basic bitwise question
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Q2. Basic c question
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Q1. Basic os questions
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Platform was hackerrank. very connected to the basics of ml.

Q1. Find the length of longest common subsequence in given strings.
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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 volatile keyword
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Volatile keyword in Java is used to indicate that a variable's value will be modified by multiple threads.
• Volatile keyword ensures visibility of changes made by one thread to other threads.

• It prevents compiler optimizations that could reorder code and cause unexpected behavior in multi-threaded environments.

• Volatile keyword is used for variables accessed by multiple threads without synchronization.

• Example: 'volatile in
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Q2. Difference between union and structure
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Union is a data structure that allows storing different data types in the same memory location, while structure is a data structure that allows storing different data types in a single unit.
• Union uses the same memory location for all its members, while structure allocates separate memory for each member.

• In a union, only one member can be accessed at a time, while in a structure, all members can be accessed simultaneous...read more
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Reverse the string in place I/P : "I love my India" O/P: "I evol ym aidnI"

Q1. Questions about DDR, Memory layout of program, What is L1, L2 cache? how is memory virtualization is been done?
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Leetcode questions followed by technical subjects