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A dataframe is a two-dimensional tabular data structure in which data is organized in rows and columns. It differs from a dataset in terms of structure and functionality.
A dataframe is a data structure in which data is organized in a tabular format with rows and columns.
It is commonly used in data analysis and manipulation tasks.
Dataframes can handle both structured and semi-structured data.
They provide a convenient wa...
To find the first 3 highest student records from a class of students.
Sort the student records in descending order based on their scores.
Select the top 3 records from the sorted list.
If there are ties, include all students with the same score in the top 3.
Consider edge cases such as empty records or less than 3 records.
Possible reasons for an atomic spark job running for more than an hour.
Data size may have increased beyond the capacity of the cluster
Issues with network connectivity or hardware failure
Inefficient code or poorly optimized queries
Resource contention with other jobs running on the cluster
Data skew or data imbalance
Incorrect configuration settings
Caching all dataframe can slow execution due to memory constraints and increased I/O operations.
Caching all dataframes can lead to memory constraints as all data is stored in memory.
Increased I/O operations can also slow down execution as data is constantly being read and written to disk.
Caching should be used judiciously and only for frequently accessed data.
Partitioning data can also help in reducing memory constrain
Infosys interview questions for designations
I applied via Job Portal
Get interview-ready with Top Infosys Interview Questions
I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.
Types of classes include abstract classes, concrete classes, interface classes, and inner classes.
Abstract classes cannot be instantiated and may contain abstract methods.
Concrete classes can be instantiated and provide implementations for all methods.
Interface classes define a contract for classes to implement.
Inner classes are classes defined within another class.
I address difficult situations within a team by promoting open communication, seeking to understand all perspectives, and collaborating on solutions.
Promote open communication to address issues early on
Seek to understand all perspectives before making decisions
Collaborate with team members to find mutually beneficial solutions
I applied via Referral and was interviewed in Oct 2024. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.
Kersal server is a type of server used for hosting websites and applications.
Kersal server is known for its reliability and performance.
It is often used by businesses to host their websites and applications.
Kersal server offers features like high uptime, security, and scalability.
Examples of Kersal server providers include AWS, Google Cloud, and Microsoft Azure.
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
Dependency injection helps in achieving loose coupling between classes.
It allows for easier testing and maintenance of code.
There are three types of dependency injection: constructor injection, setter injection, and interface injection.
We are using a microservices architecture in our project.
Decomposes the application into smaller, independent services
Each service is responsible for a specific function
Allows for scalability and flexibility
Example: Netflix, Amazon, Uber
Overloading is having multiple methods in the same class with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
Overloading involves multiple methods with the same name but different parameters.
Overriding involves a method in a subclass with the same name and parameters as a method in the superclass.
Overloading is resolved...
MVC architecture is implemented by separating the application into Model, View, and Controller components.
Create models to represent data and business logic
Develop views to display the user interface
Write controllers to handle user input and update the model
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
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