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I applied via Referral and was interviewed in Aug 2024. There were 2 interview rounds.
To find the second highest salary in a database table, you can use a SQL query with the ORDER BY and LIMIT clauses.
Use a SQL query with ORDER BY clause to sort the salaries in descending order.
Use LIMIT 1,1 to retrieve the second highest salary.
Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1,1;
Left join includes all records from the left table and matching records from the right table. Right join includes all records from the right table and matching records from the left table.
Left join: Returns all records from the left table and the matched records from the right table.
Right join: Returns all records from the right table and the matched records from the left table.
Example: Left join - SELECT * FROM table1...
I applied via Approached by Company and was interviewed before May 2023. There was 1 interview round.
Normalization is a process used to organize a database into tables and columns to reduce redundancy and improve data integrity.
First Normal Form (1NF) - Eliminates duplicate data by ensuring each column contains atomic values.
Second Normal Form (2NF) - Requires that each non-key attribute is fully functionally dependent on the primary key.
Third Normal Form (3NF) - Ensures that non-key attributes are not transitively de...
Indexes in databases are data structures that improve the speed of data retrieval operations.
Indexes are data structures that store a small portion of the table data in an optimized format for quick retrieval.
They help in speeding up data retrieval operations such as SELECT queries by reducing the number of rows that need to be scanned.
Indexes can be created on one or more columns of a table to improve the performance ...
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I applied via Naukri.com and was interviewed before Apr 2020. There were 5 interview rounds.
Procedure with bulk collect for array of strings
Use FORALL statement for efficient processing
Declare a collection type
Use LIMIT clause to control memory usage
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I applied via Naukri.com and was interviewed before Oct 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Apr 2024. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in Aug 2023. There was 1 interview round.
A process is an instance of a program while a thread is a subset of a process that can run concurrently with other threads.
Processes have their own memory space while threads share the same memory space within a process.
Processes are independent of each other while threads within the same process can communicate with each other.
Processes are heavier in terms of resource consumption compared to threads.
Example: A web br...
I applied via LinkedIn and was interviewed before Apr 2023. There was 1 interview round.
I appeared for an interview before Oct 2023.
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