Synechron Interview Questions, Process, and Tips

Yes, I have experience in writing user stories for system API definitions.

• I have written user stories to define the functionality of system APIs

• I have collaborated with developers and stakeholders to ensure the user stories accurately capture the requirements

• I have used tools like Jira or Trello to manage and track user stories

Test scenario for verifying the success of data migration

• Verify that all data from the source system has been successfully migrated to the target system

• Check for any data discrepancies or missing data during the migration process

• Ensure that data integrity is maintained throughout the migration

• Validate that all data transformations and mappings have been accurately applied

• Confirm that the migrated data is accessible and

Developed a database system for a retail company to track inventory and sales

• Designed database schema to store product information, sales data, and customer details

• Implemented stored procedures and triggers to automate inventory updates and sales reports

• Optimized SQL queries for faster data retrieval and analysis

• Challenges faced included handling large volumes of data, ensuring data integrity, and meeting performance r

Types of joins in SQL are Inner Join, Left Join, Right Join, and Full Join.

• Inner Join: Returns rows when there is a match in both tables.

• Left Join: Returns all rows from the left table and the matched rows from the right table.

• Right Join: Returns all rows from the right table and the matched rows from the left table.

• Full Join: Returns rows when there is a match in either table.

Explanation of inner join, left join, right join, and cross join with given tables a and b.

• Inner join: Returns only the rows where there is a match in both tables based on the specified condition.

• Left join: Returns all rows from the left table and the matched rows from the right table. If there is no match, NULL values are returned.

• Right join: Returns all rows from the right table and the matched rows from the left tab...read more

Indexes are data structures that improve the speed of data retrieval operations in a database. There are different types of indexes.

• Indexes are used to quickly locate data without having to search every row in a database table.

• Types of indexes include clustered indexes, non-clustered indexes, unique indexes, and composite indexes.

• Clustered indexes physically reorder the data in the table based on the index key.

• Non-clus...read more

To find department wise highest salary and then 5 highest salaries, use SQL queries with GROUP BY and ORDER BY clauses.

• Use SQL query with GROUP BY clause to get department wise highest salary

• Use ORDER BY clause to get 5 highest salaries overall

row_number assigns a unique sequential integer to each row, rank assigns a unique rank to each row with gaps, dense_rank assigns a unique rank to each row without gaps.

• row_number assigns a unique sequential integer to each row in the result set

• rank assigns a unique rank to each row in the result set with gaps between ranks

• dense_rank assigns a unique rank to each row in the result set without any gaps

Create a table with team names where each team plays with each other once.

• Create a table teams with column teamname

• Insert team names into the table

• Use a combination of team names to represent matches

Java 8 Default Method allows interfaces to have method implementations.

• Introduced in Java 8 to provide backward compatibility for interfaces

• Can have method implementations in interfaces using the 'default' keyword

• Used to add new methods to interfaces without breaking existing implementations

Sort array of strings with a given value

• Use Arrays.sort() method with a custom Comparator to sort the array based on the given value

• Handle cases where the given value is not present in the array

• Example: Sort array ['apple', 'banana', 'orange', 'grape'] with 'banana' as the given value

A palindrome program in Java checks if a given string reads the same forwards and backwards.

• Create a function that takes a string input

• Use a loop to compare characters from both ends of the string

• Return true if the string is a palindrome, false otherwise

Diamond problem in Java occurs when a class inherits from two classes that have a common ancestor, resulting in ambiguity.

• Diamond problem arises in multiple inheritance scenarios in Java.

• It occurs when a class inherits from two classes that have a common ancestor.

• To resolve the diamond problem, Java does not support multiple inheritance through classes, but it can be achieved using interfaces.

• Example: Class A and Class...read more

Iterate through the list and find pairs of numbers that sum up to 6

• Iterate through the list and check if the current number + any other number in the list equals 6

• Store the pairs of numbers that sum up to 6 in a separate list

• Return the list of pairs

Decorators in Python are functions that modify the behavior of other functions or methods.

• Decorators are defined using the @decorator_name syntax before a function definition.

• They can be used to add functionality to existing functions without modifying their code.

• Decorators can be used for logging, authentication, caching, and more.

• Example: @staticmethod decorator in Python is used to define a method that doesn't recei

Use hashing to find files with duplicate content efficiently.

• Create a hash function to generate a unique identifier for each file's content.

• Store the hash values in a dictionary with the corresponding file paths.

• Identify files with duplicate content by checking for duplicate hash values.

• Return a list of file paths with duplicate content.

Concurrent HashMap is thread-safe and allows concurrent access, while HashMap is not thread-safe.

• Concurrent HashMap is suitable for multi-threaded environments where multiple threads can access and modify the map concurrently.

• HashMap is not thread-safe and can lead to data corruption if accessed concurrently by multiple threads.

• Concurrent HashMap uses internal locking mechanisms to ensure thread safety, while HashMap d...read more

Partitioning a large database involves dividing the data into smaller chunks to improve performance and manageability.

• Identify key columns for partitioning, such as date ranges or customer IDs.

• Choose a partitioning strategy, such as range partitioning or hash partitioning.

• Implement partitioning using database features like table partitioning in Oracle or partitioned tables in PostgreSQL.