Write proc with collection? Difference between pk and unique key and questions based on them. Questions related to packages, procedures and functions eg can function return more than 1 value etc. Most of the questions from collections - nested table. How to use trim and extend? Ask to write a procedure and gave scenerios to solve using collections. Questions on performance tuning.
What is Oracle apex and architecture
trig,procedure and function,delete and drop
Questions on performance tuning
what is nvl; what is substring; what is joins, what is pseudocolumn, what is cursor, how to get the dense rank for table.
Logfile sync, wait events, scattered vs sequential read and when to be concerned, heterogenous DB migration, liquibase, jenkins pipelines for databases, git webhooks
Pagination atomic integer interface and abstract class optimistic and pessimistic logging streams
Mostly they covered all SQL concepts
Asked all the questions about Oracle basic to advaced PLSQL. Given queries to remove duplicate records and to fetch the 3rd highest salary.
types of subqueries? and difference between them? types of triggers? types of trigger? write a trigger which will using do insert, update and delete on 'employee' table and keep audit in 'audit' table. if inserting insert into table also in audit table if deleting delete from also insert in audit table if upadte is require then update table and this update entry should insert in audit table types of cursors and create procedure take cursor and display emp name and salary.? what is database name? database structure you use to create database objects?
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