TCS System Engineer Hardware Interview Questions, Process, and Tips

Quant, Reasoning and Technical

Q1. Explain Java 8 streams
Ans. 
Java 8 streams provide a way to process collections of objects in a functional style.
• Streams are sequences of elements that support various operations like filter, map, reduce, etc.

• They can be created from collections using the stream() method.

• Streams can be parallelized to improve performance using parallelStream() method.

• Terminal operations like forEach, collect, reduce are used to process the elements in a stream.
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Q2. Explain design patterns
Ans. 
Design patterns are reusable solutions to common problems encountered in software design.
• Design patterns provide a template for solving recurring design problems in software development.

• They help in creating maintainable, scalable, and efficient code.

• Examples include Singleton, Factory, Observer, and Strategy patterns.
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Q1. Are you open for rotational shifts
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Q2. Where do you see yourself in 5 years
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Aptitude questions were asked of difficulty medium to high

High difficulty coding round

Q1. Questions related to OOPs concenpts were asked
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Q2. Reverse a string
Ans. 
Reverse a string by iterating through the characters and swapping them
• Create a function that takes a string as input

• Initialize two pointers, one at the beginning and one at the end of the string

• Swap the characters at the two pointers and move them towards the center until they meet
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DSA and coding related to hashmap

Q1. Question related to project
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All basic questions of java

Q1. Design Patterns
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Q2. Data structures, difference between hashmap, set, lists
Ans. 
HashMap, set, and lists are different data structures used in programming for storing and organizing data efficiently.
• HashMap: key-value pairs, allows fast lookup of values based on keys (e.g. phonebook)

• Set: collection of unique elements, no duplicates allowed (e.g. set of unique user IDs)

• Lists: ordered collection of elements, allows duplicates and maintains insertion order (e.g. list of tasks)
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Q1. Difference between C++ and Java in inheritance
Ans. 
C++ supports multiple inheritance while Java supports single inheritance.
• C++ allows a class to inherit from multiple classes, while Java only allows a class to inherit from one class.

• Java uses interfaces to achieve multiple inheritance-like behavior.

• C++ inheritance is more flexible but can lead to ambiguity and complexity, while Java's single inheritance simplifies the design.

• Example: C++ - class B: public A, public C;...read more
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Q1. Expected Salary
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