Interview Questions.

Question 1. What Is Presto?

Answer :

Presto is a distributed SQL question engine. It is an open supply software program mission to develop a database.

Question 2. What Are The Features Of Presto?

Answer :

There are following capabilities of Presto:

It is simple to use.
It presents pluggable connectors.
It gives pipelined executions.
It gives consumer outline capabilities.
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Question three. What Are The Presto Applications?

Answer :

There are various Presto applications:

Facebook
Teradata
Airbnb
Question four. Why Should We Use Presto?

Answer :

We need to use Presto because of its capabilities:

It supports fashionable ANSI SQL.
It is built in Java.
It has connector architecture that is Hadoop.
It runs on a couple of Hadoop distributions.
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Question five. What Are The Components Of Presto Architecture?

Answer :

Presto structure additives are given under:

Client : Clint submits SQL statements to a coordinator to get the end result.
Coordinator: It parses the SQL queries.
Connector : Storage plugin is called as connectors.
Worker : It assigns project to employee nodes.
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Question 6. What Are The Log Files Of The Presto Server?

Answer :

The logs documents of the Presto server are given beneath:

Launcher.Log
Server.Log
http-request.Log
Question 7. What Is Presto Verifier?

Answer :

Presto verifier is used to check Presto in opposition to some other database (together with MySQL).

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Question 8. What Is The Default Port Of Presto?

Answer :

The default port of Presto is 8080.

Question nine. What Are The Config Properties Of Presto?

Answer :

The Config homes of Presto are given below table:

Config Properties----->Description

mission. Info -refresh-max-wait:It reduces coordinator paintings load.

Mission.Max-worker-threads:It splits the method and assigns to each worker nodes.

Dispensed-joins-enabled:It is Hashed based distributed joins.

Node-scheduler.Community-topology:It units community topology to scheduler.

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Question 10. What Are The Various Data Types In Presto?

Answer :

In Presto, there are various information kinds in Presto.

Varchar
Bigint
Double
Decimal
Json and so forth.
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Question eleven. What Are The Functions Of Presto?

Answer :

There are diverse functions of Presto that are given under:

Function--->Description

Abs(x):It returns the absolute price of X.

Cbrt(x):It returns the dice root of x.

Ceiling(x):It returns the x fee rounded as much as nearest integer.

Ceil(x):Arial for ceiling(x)

Log2(x):It returns the bottom 2 logarithm of x.

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Question 12. What Is The Use Of Mysql Connector?

Answer :

MYSQL Connector is used to query an outside MySQL database.

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Question thirteen. How Can We Create Table By Using Command?

Answer :

We can create desk via using command:

presto:tutorials> create desk mysql.Tutorials.Pattern as   

select * from mysql.Tutorials.Creator;  

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Question 14. What Is Jmx Connector?

Answer :

JMX stands for Java Management Extension. It gives information approximately the java virtual device and software program running internal JVM.