Diggibyte Technologies Data Engineer Interview Questions and Answers

Triggers are database objects that automatically execute in response to certain events or changes in data.

• Triggers are used to enforce business rules or data integrity.

• They can be used to audit changes to data.

• Triggers can be set to execute before or after an event, such as an insert, update, or delete operation.

• They can be defined on tables, views, or schemas.

• Examples of triggers include sending an email notification ...read more

Swap two numbers with and without temporary variable

• Without temporary variable: Use addition and subtraction

• With temporary variable: Use a third variable to store the value of one of the numbers

• Example without temporary variable: a=5, b=7; a=a+b; b=a-b; a=a-b;

• Example with temporary variable: a=5, b=7; temp=a; a=b; b=temp;

Aadhaar card is a unique identification card issued by the Indian government to residents of India.

• Aadhaar card is a 12-digit unique identification number issued by the Unique Identification Authority of India (UIDAI).

• It serves as proof of identity and address for Indian residents.

• Aadhaar card contains biometric and demographic information of the cardholder, including fingerprints and iris scans.

• It is used for various ...read more