Tiger Analytics Trainee Analyst Interview Questions and Answers for Freshers

Q1. Wat is singleton class, difference bw hashmap and concurrent hashmap
Ans. 
Singleton class is a class that can only have one instance, while HashMap is not thread-safe but ConcurrentHashMap is.
• Singleton class restricts instantiation to one object, ensuring a single instance throughout the application.

• HashMap allows multiple threads to access and modify it concurrently, which can lead to data corruption in a multi-threaded environment.

• ConcurrentHashMap is thread-safe and allows multiple thread...read more
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Q1. Had questions related to data structures
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Q1. Related to work culture and salary related details
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Q1. Oops concepts, lots of java
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Q2. In depth about Microservices
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Q3. About why I want to join
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Q1. Asked about Java,spring MVC,code snippets asked foroutput
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Q1. About rest template angular spring boot
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Q1. This round is withmanager about technical
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Q1. Salary discussion with hr policies
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Q1. No round was happened
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Q1. Previous projects, Basic React Questions and Node js questions.
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Fetching data from api, DSA question (Queue implementation)

Q1. Salary and package discussion
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Q1. Managerial round - just project explanation
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Q1. 1.polyfill map, currying vs closure, reduce method, explain this?, 2.what is lazyload and suspense, single thread vs multi thread, Event loop(task queue & microtask queue)?
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Q2. Explain redux? Redux vs context api? ES6 features? Rest vs Spread? null vs undefined?
Ans. 
Redux is a predictable state container for JavaScript apps.
• Redux is a state management library for JavaScript applications.

• It helps in managing the state of an application in a predictable way.

• Redux follows a unidirectional data flow pattern.

• Context API is a built-in feature of React that can be used for state management, but it is not as powerful as Redux.

• ES6 features include arrow functions, template literals, destru...read more
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Output based question regarding shallow and deepcopy related to object.
write a program for i/p: "This is the JS guide, developer!" o/p: "sihT si eht SJ ,ediug !repoleved"
react timer based output start, stop and reset.

Q1. 1.SOLID Principles: Define in detail the solid principles, interviewer will be more focused on the practical examples of the principles.
Ans. S stands for single responsibility, O stands for Open for extension and closed for modification, L stands for Liskov Substitution principle, I stands for Inversion of control and D stands for Dependency inversion
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Q1. Coding questions like implement linked list
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Q2. Find the second largest element from the array.
Ans. 
Find the second largest element from the array.
• Sort the array in descending order and return the second element.

• Iterate through the array and keep track of the two largest elements.

• Use a priority queue to find the second largest element.
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Q3. Sort the array and return second last element
Ans. 
Sort array and return second last element
• Use built-in sort function

• Access second last element using array index -2
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