Fiserv Interview Questions, Process, and Tips

Q1. Performance tuning
Add your answer
Q2. Advance sql queries
Add your answer
Q3. Subqueries in oracle
Ans. 
Subqueries in Oracle are queries nested within another query to retrieve data from multiple tables.
• Subqueries can be used in SELECT, INSERT, UPDATE, and DELETE statements.

• Subqueries can return a single value, a single row, multiple rows, or a table.

• Subqueries can be correlated or non-correlated, depending on whether they reference columns from the outer query.

• Example: SELECT * FROM employees WHERE department_id = (SELE...read more
Answered by AI
Add your answer

Q1. Reason for change
Add your answer
Q2. Situational questions
Add your answer

Q1. Interview questions related to oops basics, asp.net, API etc.
Add your answer

Q1. More of how to manage a team, project, agile approach etc.
Add your answer

Coding test and mcqs

GD on any topic related to social cause

Q1. Sql about database
Add your answer

Q1. SQL abut joins and where clause
Ans. 
SQL joins are used to combine rows from multiple tables based on related columns, while the WHERE clause is used to filter rows based on specified conditions.
• Joins are used to retrieve data from multiple tables by specifying the related columns between them.

• The WHERE clause is used to filter rows based on specified conditions.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• Example: SELECT...read more
Answered by AI
Add your answer