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I applied via LinkedIn and was interviewed in Jun 2024. There were 2 interview rounds.
Redux offers centralized state management, time-travel debugging, middleware support, and better performance compared to Context API in React.
Redux provides a centralized store for managing application state, making it easier to maintain and update state across components.
Redux allows for time-travel debugging, enabling developers to easily track and debug state changes over time.
Redux supports middleware, allowing for...
Uncontrolled components are useful when you want to allow user input without controlling the value of the input field.
Useful for simple forms where you don't need to validate or manipulate the input data.
Can be used for search bars where the input value is not critical to the application state.
Helpful for input fields that are part of a larger form and don't require immediate validation.
Use 'let' for block-scoped variables, 'var' for function-scoped variables.
Use 'let' when you want to declare a variable with block scope.
Use 'var' when you want to declare a variable with function scope.
Using 'let' helps prevent variable hoisting and can lead to cleaner code.
Example: let x = 10; for (let i = 0; i < x; i++) { console.log(i); }
Example: var y = 20; function test() { var z = 30; console.log(y + z); }
Local storage is considered more secure due to its same-origin policy and limited access by other websites.
Local storage is more secure as it is limited to the same origin policy, meaning only the website that stored the data can access it.
Local storage data is not sent with every HTTP request, reducing the risk of data interception.
Session storage is also secure but data is lost when the browser is closed, making it l...
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I applied via Walk-in and was interviewed before Sep 2020. There were 4 interview rounds.
I appeared for an interview before Jul 2020.
Yes, Infosys is listed on the Indian stock exchanges as well as on the NYSE.
Infosys is listed on the Bombay Stock Exchange (BSE) and National Stock Exchange of India (NSE)
It is also listed on the New York Stock Exchange (NYSE)
Infosys has a market capitalization of over $80 billion as of 2021
I applied via Company Website and was interviewed before Feb 2020. There was 1 interview round.
I applied via Naukri.com and was interviewed before May 2020. There were 3 interview rounds.
I applied via Campus Placement and was interviewed before Sep 2019. There were 5 interview rounds.
OOPs concepts in Java are the fundamental principles of object-oriented programming.
Encapsulation: wrapping data and code into a single unit
Inheritance: creating new classes from existing ones
Polymorphism: using a single interface to represent multiple types
Abstraction: hiding implementation details from the user
Examples: class, object, inheritance, polymorphism, encapsulation
Stack is a LIFO data structure while Queue is a FIFO data structure.
Stack follows Last In First Out (LIFO) principle while Queue follows First In First Out (FIFO) principle.
Stack has two main operations: push and pop while Queue has two main operations: enqueue and dequeue.
Stack is used in recursive function calls, undo/redo operations, and backtracking while Queue is used in breadth-first search, printing tasks in ord...
SQL query to find second highest salary in database
Use ORDER BY and LIMIT to get the second highest salary
Assume ties are allowed and use DISTINCT
Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.
Method overloading is done within the same class while method overriding is done in different classes (subclass and superclass).
Method overloading is achieved by changing the number of parameters or the data type of ...
The parent class of all classes in Java is the Object class.
All classes in Java implicitly extend the Object class.
The Object class provides basic methods such as toString(), equals(), and hashCode().
Any class can override these methods to provide custom implementations.
Example: public class MyClass extends Object { ... }
Example: Object obj = new MyClass();
SQL databases are relational and use structured query language, while NoSQL databases are non-relational and use various data models.
SQL databases are based on a fixed schema, while NoSQL databases are schema-less.
SQL databases use tables to store data, while NoSQL databases use various data models like key-value, document, columnar, or graph.
SQL databases are better suited for complex queries and structured data, whil...
I applied via Company Website and was interviewed before Oct 2019. There were 4 interview rounds.
I applied via Naukri.com and was interviewed before Oct 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before Jun 2021. There was 1 interview round.
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Infosys