GAVS Technologies Junior Engineer Interview Questions and Answers

Q1. Java 8 vs 7 case studies. Stream vs collections case studies.
Ans. 
Java 8 introduced streams which are more efficient than collections in certain cases.
• Streams are useful for processing large amounts of data in parallel

• Collections are better for small amounts of data or when modifying data

• Java 8's stream API provides a functional programming approach to data processing

• Java 7's collections API is more traditional and imperative

• Example: Using streams to filter and map data from a databa...read more
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Q1. Add one to a given String of number
Ans. 
Add one to a given String of number
• Convert the string to integer, add one, and convert back to string

• Handle edge cases like leading zeros

• Consider using built-in functions like parseInt() and toString()
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Q1. Hash map implementation. exception handling in lambda exp. microservices architecture.
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Q1. Why u want to join?
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Q1. Internal working of hashmap
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HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap uses the hashCode() method of ke...read more
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Q2. What are the feature of jdk 8
Ans. 
JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements efficiently.

• Default methods allow interfaces to have concrete methods.

• Date and Time API improvements.
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Q1. Basic java, rest assured api
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Basic java programming

Q1. Depth automation testing related question
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Q1. Salary discussion
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Objective technical question was given.

Q1. Java, DB, Spring, UI related questions asked.
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Q2. CoreJava Multi-threading
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Q3. Database many to many relattionship related question
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Q1. Mutli-threading related questions
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Q1. Salary expectation and joining details.
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Q1. Java Multithreading
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Q2. Core java using java 8 features
Ans. 
Core Java features in Java 8 include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have methods with implementat...read more
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Q3. Oops concepts in java
Ans. 
Oops concepts in java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the imp...read more
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Q4. Spring MVC and Batch
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Q5. Basic SQL queries, joins and all
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