Lookout Senior Software Engineer Interview Questions and Answers

Q1. DSA - level order traversal, sliding window.
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Q1. Atomic transaction in distributed system
Ans. 
Atomic transactions ensure that all operations in a transaction are completed successfully or none at all in a distributed system.
• Atomic transactions guarantee that all operations within a transaction are either all successful or all rolled back.

• In distributed systems, atomic transactions are crucial for maintaining data consistency across multiple nodes.

• ACID properties (Atomicity, Consistency, Isolation, Durability) a...read more
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Q1. Impliment counter using closure in js
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Implement a counter using closure in JavaScript.
• Create a function that returns another function which increments a counter variable.

• The counter variable should be defined in the outer function's scope and only accessible to the inner function.

• Each time the inner function is called, increment the counter variable and return its value.
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Q2. Explain promises, promise.all(), impliment binary search
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Promises are objects representing the eventual completion or failure of an asynchronous operation. promise.all() is a method that takes an array of promises and returns a single promise that resolves when all of the promises have resolved.
• Promises are used in JavaScript to handle asynchronous operations.

• promise.all() takes an array of promises and returns a single promise that resolves when all promises in the array ha...read more
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Q1. Questions on kafka, cache invalidation, diff b/w authentication and authorization
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It includes both aptitude, CS fundamentals and coding

Q1. There were three interviewers 1st person asked HR questions like personal details etc.. 2nd person asked technical questions like programming fundamentals and coding question 3rd person asked some logical...read more
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Q2. Self introduction and things about your native place
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Q3. Some CS fundamentals and a programme for finding permutations of given string
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Q4. A logical puzzle about bulbs and switches
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Q5. A programme to find distinct integers in given array
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Program to find distinct integers in given array
• Iterate through the array and store each integer in a set data structure

• Check if the integer already exists in the set, if not add it to the set

• Return the set of distinct integers
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Simple java questions including theory and code snippet

Q1. Iterate collection and do some options on some perticular elements?
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Q2. Palandrone string Or pattern program Or string related program?
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Q1. Linux commands operating system?
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Linux commands are used to interact with the operating system through the command line interface.
• Linux commands are case-sensitive

• Commands are typically followed by options and arguments

• Common commands include ls (list files), cd (change directory), mkdir (make directory)

• Commands can be combined using pipes (|) and redirection symbols (> and <)
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Q2. Html css javascript theory questions
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Q1. Salary discuss and general questions?
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Q2. They ask for join immediately?
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