Tata Communications Software Engineer Interview Questions and Answers

Q1. Mid level coding question, Project and real time scenerio in detail
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Q1. JavaScript prototype sorting function
Ans. 
JavaScript prototype sorting function for arrays of strings
• Use the Array.prototype.sort() method to sort an array of strings

• Pass a compare function to specify the sorting order

• Example: ['banana', 'apple', 'cherry'].sort((a, b) => a.localeCompare(b))
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Q2. Promise polyfill from scratch
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Creating a Promise polyfill from scratch involves implementing the Promise API using callbacks and handling asynchronous operations.
• Understand the Promise API and its methods (resolve, reject, then, catch)

• Implement a constructor function that takes an executor function as an argument

• Handle asynchronous operations using callbacks and setTimeout

• Implement the then and catch methods to handle success and error cases respec
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Q3. React hooks -useEffect useMemo
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Q1. Session Management in applications
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Session management is the process of securely managing user sessions in web applications.
• Use cookies or tokens to track user sessions

• Implement session timeout to prevent unauthorized access

• Store session data securely on the server side

• Use HTTPS to encrypt session data during transmission
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Q2. Why react is fast than other frameworks
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React is faster than other frameworks due to its virtual DOM, efficient diffing algorithm, and use of server-side rendering.
• React uses a virtual DOM which allows it to update only the necessary components instead of re-rendering the entire page.

• React's efficient diffing algorithm compares the virtual DOM with the actual DOM to minimize updates and improve performance.

• React supports server-side rendering, which can impr...read more
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Q1. Tell me about your past experience?
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Q1. Core Java concepts, oops fundamental, cloud, stream api, java 8 features, hashmap how it works, equals override contract
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Q1. Java 8, multi threading, why lazy evaluation in stream api, internal working of hash map, overloading, overriding
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Q1. Java basics prepare well
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They will give 3 questions

Q1. There will be technical round after finishing of exam
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Q2. And HR round also will be same time of Technical
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Dsa dp, graphs and many more questions from arrays and linked list were asked