All about coronavirus symptoms in Humans and important safety tips.
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All about coronavirus symptoms in Humans and important safety tips.
Frequently asked Top 25+ Angular 2 interview questions and best answers for freshers and 2-4 year experienced web developers.
Best place to learn and solution for all your needs related to fresher jobs, campus placement, interview preparation.
Salesforce Interview Questions on Triggers
A trigger is the piece of code, that is executed Before or After a record is inserted or updated.
Usually, an APEX (code) based evaluation of criteria to set off a chain of events.These events execute the following types of operations like : Insert, Update, Delete, Merge, Upsert and Undelete.
Hey Guys, In this post I am going to share Salesforce Interview Questions on Triggers
1. What is a Trigger?
The trigger is defined as an Apex code that execute before or after the following functions such as insert, update and delete etc. Trigger enables to perform custom actions before and after modifications to the records of Salesforce.
Types of Apex triggers
There are two types of triggers:
• Before trigger are used to update or validate values of a record before they are saved to the database.
• After trigger are used to access field values of the records that are stored in the database and use these values to make changes in other records.
The records that fire the after trigger are read only.
Trigger Syntax
trigger TriggerName on ObjectName (trigger_events) { // Implement the Logic here code_block }
Example:
trigger myAccountTrigger on Account (before insert, before update) { CreateAccount.getAccount(); }
MIND IT !
1. myAccountTrigger – triggerName ( It is the name you would want to give your trigger).
2. Account – Objectname (It is the object on which the action needs to be performed).
3. before insert, before update – Trigger_events
Before insert: When using this event, the code block gets executed before a new record is inserted.
Before update: When you use this event, the code will get executed before a new record is updated in the object.
2. What are the various event on which a trigger can fire?
A trigger is a set of statement which can be executed on the following events. In above trigger events one or more of below events can be used with comma separated.
• before insert • before update • before delete • after insert • after update • after delete • after undelete
3. What are the considerations while implementing the Triggers?
Consider the following before implementing the triggers.
• Upsert trigger fires on 4 different events :- before(insert, update), after (insert, update)
• Merge trigger are fired on both events on delete
• Field history is updated after the trigger has successfully finished processing data.
• Any callout should be asynchronous so that trigger does not have to wait for the response.
• A trigger cannot have a static keyword in its code.
• If a trigger completes successfully the changes are committed to the database and if it fails the transaction is rolled back.
More information visit the link below:
https://learnfrenzy.com/blog/salesforce-interview-questions-on-triggers
Coronavirus Symptoms in Humans and Safety Tips
Talk of the new coronavirus (COVID-19) is everywhere. Here’s what you should know and do to keep yourself and your loved ones healthy.
Two news cases of coronavirus have been reported in India, one in New Delhi and another in Telangana. This takes the total coronavirus cases in India to five, weeks after the first case was reported in Kerala.
The government said both the patients are stable and that they are being closely monitored.
The person from Delhi has a travel history from Italy, while the one from Telangana has a travel history from Dubai, the Union Health Ministry said.
The new coronavirus or COVID-19 has spread to more than 70 countries, and killed more than 3000 globally.
What is coronavirus?
The coronavirus is a family of viruses that can cause a range of illnesses in humans including common cold and more severe forms like SARS and MERS which are life-threatening. The virus is named after its shape which takes the form of a crown with protrusions around it and hence is known as coronavirus.
Know the symptoms
The new virus causes respiratory illness in humans, usually 2–14 days after exposure. Illnesses have ranged from mild symptoms to severe, including fever, cough, and shortness of breath. The virus is thought to spread mainly from close contact with an affected person. It spreads in the air, like flu, and through droplets from sneezes and coughs. The droplets can stay suspended in the air and can land on surfaces that are touched by others.
Some Important Safety Tips For Coronavirus
About Coronavirus
#1: There's only one thing you need to understand about how a coronavirus
#2: The virus spreads when these droplets
#3:
#4:
More information visit the link below:
https://learnfrenzy.com/blog/coronavirus-symptoms-in-humans-and-safety-tips