Google Trainee Interview Questions and Answers for Freshers

Q1. Collections framework, Explain why you chose a particular collection instead of other with example scenario based
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Q2. Explain your project
Ans. 
Developed a web application for online shopping with features like user authentication, product search, and order management.
• Implemented user authentication using Spring Security

• Utilized Hibernate for database operations

• Designed front-end using AngularJS for dynamic user interface
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Ages, trains, profit losss, hcf lcm, clock, simple interest 30 min

Array string sorting algorithm

Q1. Leetcode 2sum,3sum,closest sum,merge 2 sorted linked lists Questions
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Q2. Leetcode merge 2 sorted linkedlists
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Q1. Detect cycle in directed graph
Ans. 
Detect cycle in directed graph using depth-first search algorithm.
• Use depth-first search (DFS) algorithm to traverse the graph.

• Maintain a visited set to keep track of visited nodes.

• If a node is visited again during traversal, there is a cycle in the graph.
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Q1. My skills , introduction, hobbies
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Q1. Self study introduction , how much salary prepared
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Problem solving and basics

Q1. Dynamic Programming and array and DA
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Q1. Difference between Interface and Abstract class?
Ans. 
An interface is a contract that defines a set of methods that a class must implement, while an abstract class is a class that cannot be instantiated and can contain both abstract and non-abstract methods.
• An interface can only have abstract methods, while an abstract class can have both abstract and non-abstract methods.

• A class can implement multiple interfaces, but can only extend a single abstract class.

• Interfaces are...read more
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Q2. How to make class as a immutable?
Ans. 
To make a class immutable in Java, make it final, declare all fields as private and final, and provide only getter methods.
• Declare the class as final to prevent inheritance

• Declare all fields as private and final to prevent modification

• Provide only getter methods to access the fields

• Avoid providing setter methods or any other methods that modify the state of the class
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Q1. Java Collection framework, java 8 features
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Q1. Give three date functions?
Ans. 
Three date functions in Java are getDate(), getMonth(), and getYear().
• getDate() - Returns the day of the month represented by this Date object.

• getMonth() - Returns the month represented by this Date object.

• getYear() - Returns the year represented by this Date object.
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Q1. How is your work divided?
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Q1. Expected compensation
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