Keyloop Interview Questions and Answers

Delete and truncate are SQL commands used to remove data from a table, but with key differences.

• DELETE is a DML command used to remove specific rows from a table based on a condition.

• TRUNCATE is a DDL command used to remove all rows from a table, resetting auto-increment values.

• DELETE can be rolled back, while TRUNCATE cannot be rolled back.

• DELETE triggers ON DELETE triggers, while TRUNCATE does not trigger any triggers.

• DELETE is slower as it logs individual row deletions, wh...read more

Linux commands are instructions given to the operating system to perform specific tasks or operations.

• Linux commands are case-sensitive

• Commands are typically entered in the terminal

• Common commands include ls (list files), cd (change directory), mkdir (make directory)

• Commands can be combined with options and arguments for more specific actions

Virtualization is the process of creating a virtual version of a device or resource, such as a server, storage device, network or operating system.

• Virtualization allows multiple virtual instances to run on a single physical machine

• It helps in optimizing resources and improving efficiency

• Examples include VMware for server virtualization, VirtualBox for desktop virtualization

Cloud computing is the delivery of computing services like servers, storage, databases, networking, software, analytics, and intelligence over the internet.

• AWS (Amazon Web Services) is a popular cloud computing platform offered by Amazon.

• Cloud computing allows users to access resources on-demand without the need for physical infrastructure.

• AWS provides a wide range of services such as EC2 (Elastic Compute Cloud), S3 (Simple Storage Service), and RDS (Relational Database Servi...read more

A lecturer is a person who delivers lectures or presentations on a particular subject or topic.

• Lecturers typically have expertise in a specific field or subject area.

• They often teach at universities, colleges, or other educational institutions.

• Lecturers may also conduct research and publish academic papers.

• They play a crucial role in educating and inspiring students.

• Some lecturers may also provide training or workshops in their area of expertise.