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Infosys
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I applied via Naukri.com and was interviewed in Aug 2022. There were 3 interview rounds.
Java is a high-level programming language used to develop applications that can run on any platform.
Java code is compiled into bytecode that can run on any platform with a Java Virtual Machine (JVM)
JVM acts as an interpreter and translates bytecode into machine code
Java's platform independence is achieved through the 'Write Once, Run Anywhere' (WORA) principle
Java's standard library provides platform-independent APIs f
Java 8 introduced several new features including lambda expressions, streams, and default methods.
Lambda expressions for functional programming
Streams for efficient processing of large data sets
Default methods for backward compatibility
Date and Time API for improved handling of date and time
Nashorn JavaScript engine for improved performance
Type annotations for improved type checking
Parallel array sorting for improved p...
Serialization is the process of converting an object into a stream of bytes to store or transmit it.
Serialization is used to save and restore object states
Java provides Serializable interface to implement serialization
Serialization can be used for inter-process communication and distributed systems
Deserialization is the process of converting a stream of bytes back into an object
Serialization can be customized using rea
Static variable is a variable that belongs to the class and not to the instance of the class.
Static variables are declared using the 'static' keyword.
They are initialized only once, at the start of the program.
They can be accessed using the class name, without creating an instance of the class.
Changes made to a static variable are reflected across all instances of the class.
Example: 'public static int count = 0;'
Collections are a group of classes and interfaces used to store and manipulate groups of objects in Java.
Collections provide a way to store and manipulate groups of objects in Java
They offer various data structures like List, Set, Map, etc.
Collections provide methods to add, remove, and search for elements in the data structures
They also offer algorithms for sorting and searching elements
Examples include ArrayList, Has
ResultSet is an interface in Java used to retrieve data from a database. It should be avoided due to its performance issues.
ResultSet is used to retrieve data from a database in Java
It has performance issues and should be avoided if possible
Alternative options like JPA or Hibernate can be used instead
What people are saying about Infosys
I applied via Walk-in and was interviewed before Jul 2021. There was 1 interview round.
I appeared for an interview before Feb 2021.
Time - 60mins
Time- 30mins
I applied via Company Website and was interviewed before Jan 2021. There were 3 interview rounds.
It totally taken by TCS ion
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