Software Specialist Interview Questions and Answers for Freshers

Use SQL query with COUNT function to get the count of records in the table.

• Use the SQL query: SELECT COUNT(*) FROM table_name;

• Replace 'table_name' with the actual name of the table you want to count records from.

• The COUNT function returns the number of rows that match the specified criteria.

DBMS stands for Database Management System. It is a software that manages databases and allows users to interact with them.

• DBMS is a software system that allows users to create, retrieve, update, and manage data in a database.

• There are different types of DBMS, such as relational DBMS (RDBMS), object-oriented DBMS (OODBMS), and NoSQL DBMS.

• Examples of popular DBMS include MySQL, Oracle Database, Microsoft SQL Server, and MongoDB.

Java8 code for multi-threading and file handling

• Use ExecutorService to create and manage threads

• Use Files class to read/write files

• Example: ExecutorService executor = Executors.newFixedThreadPool(5);

• Example: Files.write(Paths.get("file.txt"), "Hello World".getBytes());

To add a record to a table, you can use SQL INSERT statement.

• Use the INSERT INTO statement followed by the table name

• Specify the column names and values to be inserted

• Example: INSERT INTO employees (id, name, salary) VALUES (1, 'John Doe', 50000)

Joins in SQL are used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column.

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

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;