10+ Jood FM Interview Questions and Answers

SQL clauses are used to perform specific actions in a SQL query.

• SELECT: retrieves data from a database

• FROM: specifies the table(s) to retrieve data from

• WHERE: filters the data based on specified conditions

• GROUP BY: groups the data based on specified columns

• HAVING: filters the grouped data based on specified conditions

• ORDER BY: sorts the data based on specified columns

• JOIN: combines rows from multiple tables based on related columns

• INSERT INTO: inserts new data into a table

• UPD...read more

TRUNCATE, DROP, and DELETE are SQL commands used to remove data from a table, but they differ in their functionality.

• TRUNCATE is a DDL command that removes all rows from a table, but keeps the structure intact.

• DROP is a DDL command that removes an entire table, including its structure and data.

• DELETE is a DML command that removes specific rows from a table based on a condition.

• TRUNCATE is faster than DELETE as it doesn't generate any transaction logs.

• DROP is irreversible and ...read more

A stored procedure is a precompiled set of SQL statements that can be executed on demand.

• Stored procedures are stored in a database and can be called by applications or other stored procedures.

• They are used to encapsulate and execute complex logic or tasks.

• Stored procedures can accept input parameters and return output parameters or result sets.

• They improve performance by reducing network traffic and optimizing query execution.

• Examples of stored procedures include creating a ...read more

Data types are classifications of data that determine the type of values that can be stored and manipulated.

• Data types define the characteristics of data such as size, range, and operations that can be performed on them.

• Common data types include integers, floating-point numbers, strings, booleans, and arrays.

• Examples: int age = 25, float salary = 5000.50, string name = 'John Doe', bool isEmployed = true, int[] numbers = {1, 2, 3}

A primary key is a unique identifier for a record in a database table.

• Primary key ensures each record in a table is unique.

• It is used to establish relationships between tables.

• Primary key can be a single column or a combination of columns.

• It enforces data integrity and allows efficient data retrieval.

• Examples of primary keys include social security numbers, email addresses, etc.

Structured Query Language is a standardized programming language used to manage and manipulate databases.

• SQL is used to retrieve, insert, update, and delete data in databases.

• It is a declarative language, meaning users specify what they want to retrieve or manipulate without needing to specify how to do it.

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE, CREATE, and DROP.

• Example: SELECT * FROM employees WHERE department = 'IT';

GSM is a mobile communication standard that uses MSC to connect calls between mobile devices.

• GSM stands for Global System for Mobile Communications

• MSC stands for Mobile Switching Center

• GSM is a digital cellular network used for mobile communication

• MSC is responsible for routing calls and messages between mobile devices

• GSM and MSC work together to provide seamless mobile communication

• Example: When you make a call on your mobile phone, the call is routed through the MSC to the ...read more

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;

Service Level Agreement is a contract between a service provider and a customer that outlines the level of service expected.

• Defines the services to be provided

• Specifies the responsibilities of both parties

• Outlines the metrics used to measure performance

• Includes penalties for not meeting agreed-upon service levels

• Can cover aspects like uptime, response time, and resolution time

• Example: An SLA between a cloud service provider and a business may guarantee 99.9% uptime