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I applied via Company Website and was interviewed in Feb 2023. There were 2 interview rounds.
OOPs is a programming paradigm that uses objects to represent real-world entities and provides encapsulation, inheritance, and polymorphism.
Encapsulation: Hides the implementation details of an object from the outside world
Inheritance: Allows creating a new class from an existing class
Polymorphism: Allows objects of different classes to be treated as if they are of the same class
Advantages: Reusability, Modularity, Fle...
Different types of joins are Inner Join, Left Join, Right Join, and Full Outer Join.
Inner Join returns only the matching rows from both tables.
Left Join returns all the rows from the left table and matching rows from the right table.
Right Join returns all the rows from the right table and matching rows from the left table.
Full Outer Join returns all the rows from both tables, including non-matching rows.
WHERE clause filters rows before grouping, HAVING clause filters groups after grouping.
WHERE clause is used to filter rows based on a condition
HAVING clause is used to filter groups based on a condition
WHERE clause is used before GROUP BY clause
HAVING clause is used after GROUP BY clause
WHERE clause cannot contain aggregate functions
HAVING clause can contain aggregate functions
Example: SELECT department, AVG(salary) FR...
Query to fetch details of employees in the same department
Use SELECT statement to fetch employee details
Use JOIN to join employee and department tables
Use WHERE clause to filter employees in the same department
I applied via Approached by Company and was interviewed before Aug 2022. There were 3 interview rounds.
Delete command removes rows one by one while truncate command removes all rows at once.
Delete is a DML command while truncate is a DDL command.
Delete can be rolled back while truncate cannot be rolled back.
Delete command fires triggers for each row deleted, while truncate does not.
Delete command is slower as it maintains logs for each row deleted, while truncate is faster as it does not maintain logs.
Delete command can...
To join two tables with inner join, use the JOIN keyword along with the ON clause to specify the join condition.
Use the JOIN keyword to combine rows from two tables based on a related column between them
Specify the join condition using the ON keyword followed by the columns to join on
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
Use SQL query with GROUP BY and HAVING clause to delete duplicate records in a table.
Identify the columns that define a duplicate record
Write a SQL query to select the duplicate records using GROUP BY and HAVING clause
Delete the duplicate records using DELETE statement with the identified criteria
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I was interviewed in Jan 2025.
I was interviewed in Jan 2025.
A sequence was provided: 4181, 2684, 1597, 987, 610.
first 2 are given and write code for other value calculation using java 8
The second question required writing a reverse of a palindrome using both Java 8 streams. I was able to successfully write both and clear the first round.
Java 17 introduces sealed classes to restrict inheritance and improve code maintainability.
Sealed classes are declared using the 'sealed' keyword followed by the permitted subclasses.
Subclasses of a sealed class must be either final or sealed themselves.
Errors may occur when trying to extend a sealed class with a non-permitted subclass.
Implementation of 'notify me if item is back in stock' feature in an ecommerce application
Create a database table to store user notifications for out-of-stock items
Implement a service to check item availability and send notifications to subscribed users
Provide a user interface for users to subscribe to notifications for specific items
posted on 4 Feb 2025
I was interviewed in Jan 2025.
posted on 6 Jan 2025
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
I applied via Company Website and was interviewed in Nov 2024. There were 13 interview rounds.
Google primarily focuses on pure data structures and algorithms-based questions during coding interviews. Other computer science core topics are typically not covered in Google's interviews. Therefore, it is essential to be proficient in data structures and algorithms to succeed in the Google coding interview.
An aptitude test is a tool used to evaluate a person's skills, abilities, and potential for success in a specific role or activity.
Group discussion is a process of exchanging ideas and opinions among individuals on a specific topic. It is a structured form of communication in which participants have the opportunity to express their views while also listening to others' perspectives on the same subject.
An assignment is a task or piece of work that you are given to complete, particularly as part of your job or studies. The assignment for the course includes written assignments and practical tests, similar to tasks, work, jobs, or charges.
A case study is a detailed description and assessment of a specific situation in the real world, created for the purpose of deriving generalized insights and understanding. It can focus on an individual, a group of people, an organization, or an event, among other subjects.
SCD Type 2 implementation involves tracking historical changes in data by creating new records for each change.
Identify the columns that need to be tracked for changes
Add effective start and end dates to track the validity of each record
Insert new records for changes and update end dates for previous records
Maintain a surrogate key to uniquely identify each version of the record
I can join the team within 2 weeks.
I can start within 2 weeks of receiving the offer.
I need to give notice to my current employer.
I may need to relocate, which could affect my start date.
posted on 2 Feb 2025
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