Application Support Interview Questions and Answers

An index is a data structure that improves the speed of data retrieval operations in a database.

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

• Indexes can be created on one or multiple columns in a table.

• Indexes help in quickly locating data without having to scan the entire table.

• Examples of indexes are primary keys, foreign keys, and indexes created for frequently searched columns.

grep is a command-line utility for searching text files for specific patterns.

• Used to search for specific patterns in text files

• Can be used with regular expressions

• Can search for patterns in multiple files at once

• Can be used to filter output from other commands

A view is a virtual table based on the result set of a SQL query. Normalization is the process of organizing data in a database to reduce redundancy.

• Views in databases are used to simplify complex queries by storing the query as a virtual table.

• Normalization involves breaking down data into smaller, more manageable tables to reduce redundancy and improve data integrity.

• Examples of normalization include breaking down a customer table into separate tables for customer details a...read more

ITIL (Information Technology Infrastructure Library) is a set of best practices for IT service management.

• ITIL is a framework that outlines processes, tasks, and checklists for managing IT services.

• It focuses on aligning IT services with the needs of the business and improving efficiency.

• ITIL processes include incident management, problem management, change management, and more.

• ITIL helps organizations deliver value to their customers through quality IT services.

• ITIL certific...read more