CleverTap Senior Software Engineer Interview Questions and Answers

Q1. What is CSP? what is nonce? Few coding problems make flat array, etc. Advance javascript questions.
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Q1. What is generator functions? what is symbols? write an implementation for const keyword to support in es05.
Ans. 
Generator functions and symbols in JavaScript. Implementation of const keyword in ES5.
• Generator functions are functions that can be paused and resumed, allowing for lazy evaluation of data.

• Symbols are a new primitive type in ES6 that can be used as unique identifiers.

• To implement const in ES5, we can use Object.defineProperty to create a read-only property on an object.
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Q2. Explain or write custom events with example.
Ans. 
Custom events are user-defined events that can be triggered in a software application.
• Custom events can be defined using event listeners and dispatchers.

• They can be used to track user behavior, monitor application performance, and trigger specific actions.

• Examples of custom events include button clicks, form submissions, and page scrolls.
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Q1. Difference between null and object.
Ans. 
Null is absence of value while object is a collection of properties and methods.
• Null is a primitive value while object is a complex data type.

• Null is used to indicate absence of value while object is used to represent real-world entities.

• Null cannot have properties or methods while object can have both.

• Example of null: let x = null; Example of object: let person = { name: 'John', age: 30 };
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I was asked to implement lru cache which i did but still didn’t made to next round as apparently i didn’t complete the working code though in my opinion i did

Q1. Complete Code for Ludo Game. Sort of Machine coding round.
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Q2. Given an array of intervals and return the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.
Ans. 
Remove overlapping intervals to minimize removals.
• Sort intervals by end time

• Iterate through intervals, remove overlapping intervals

• Return count of removed intervals
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Q1. Design Least recently used cache.
Ans. 
Design a Least Recently Used cache system.
• Implement a doubly linked list to keep track of the order of usage of cache items.

• Use a hashmap to store key-value pairs for quick access to cache items.

• When a new item is accessed, move it to the front of the linked list. If the cache is full, remove the least recently used item from the end of the list.
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Discussion about OOPS concepts and String related program

Program on Recursion and Array

Q1. Strength and Weakness
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Q2. Reason for joining with company
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Two questions asked:
1. Partition equal sum
2. find length largest region boolean matrix

Hacker rank evaluation with three questions

Q1. Android fundamentals
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Q2. Lifecycle methods and synchronization
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Q1. Comparator based problem solving
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Q2. Binary tree based Hashmap question
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Q1. Usual behavior fit questions
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