Clock
Test duration:
20
min
Notes
No. of questions:
10
Tie
Level of experience:
Entry/Mid/Senior

Greenplum Skills Test

iMocha’s Greenplum skills test is the most preferred tech assessment for recruiters and hiring managers to assess candidates objectively. Our test is useful for hiring job roles like Project Lead - Greenplum and Big Data Developer. This Greenplum assessment test helps recruiters to increase the interview-to-selection ratio by 62% & reduce hiring costs by 40%.

12367
+
Candidates
Assessed
112
+
Organizations Served
Fujitsu
Paypal
Capgemini
Deloitte
Coupa
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Vanguard
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About

Greenplum Skills Test

Greenplum is a big data technology based on MPP architecture and Postgres open-source database technology. Greenplum reduces data silos by providing you with a single, scale-out environment for converging analytic and operational workloads, like streaming ingestion. All major Greenplum contributions are part of the Greenplum Database project and share the same database core, including the MPP architecture, analytical interfaces, and security.

The Greenplum skills test may contain coding questions and innovative AI-LogicBox (Pseudo coding platform) questions to assess a candidate’s coding skills in a fun & quick way.

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How it works

Test Summary

The Greenplum skills test helps to screen the candidates who possess the following traits:

  • Strong knowledge of databases in Greenplum
  • Good knowledge of Greenplum catalogs, Greenplum parameters, etc.
  • Experience with Greenplum maintenance and security procedures
  • Familiarity with the hash function, MVCC, redistribution motions, etc., in Greenplum

iMocha’s Greenplum assessment test is secure and reliable. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. 

Test Duration
20
No. of Questions
10
Level of Expertise
Entry/Mid/Senior
Useful for hiring
  • Project Lead - Greenplum
  • Big Data – Greenplum
Topics Covered
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Greenplum Database

Our test assesses a candidate’s knowledge of an advanced, fully featured, open-source data platform that provides powerful and rapid analytics on petabyte-scale data volumes.

MVCC in Greenplum

Our Greenplum skills test evaluates a candidate’s knowledge of the Multiversion Concurrency Control (MVCC) model to manage concurrent transactions for heap tables. It controls a database management system and allows concurrent queries to complete with correct results while ensuring the integrity of the database.
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Greenplum Maintenance

The test checks knowledge of the process of periodically checking the status of Greenplum Database catalogs for bloat, and VACUUM-ing the catalog as appropriate.
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Greenplum Catalog

iMocha’s pre-hire test evaluates a candidate’s understanding of the Greenplum catalog, which contains information about all objects and their associated dependencies.
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Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.

Question types :

Multiple Option

Topic:

Difficulty:

Hard


Q 1. You have been asked to train « Naive Bayes model for spam detection dataset

Using Python command, what wil you add in the given code at XXXX to deciore, it and train your modal for the given dataset?

import numpy os np

X= nporroyll 3. 2b[1 21 [2.21.[3,21)
Y= nporray(fi.a,a.1))

XXXX

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

Question types :

Multiple Option

Topic:

Machine teaming

Difficulty:

Hard


Q 1. Q2 Lets assume that you have 6 Pandas DataFrome(af) in the below tole.

Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074

When the following commend is executed, what hoppens to the DatoFrome?

df= defiinat()
Y= nporray(fi.a,a.1))

Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074
Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074
it gives an error becouse of the third row which has on empty string.
None of these

Question types :

Multiple Option

Topic:

GP catalogs - gp_segment_configuration

Difficulty:

Mediam

Question:

You are working in the Greenplum DBA and want to see primary to mirror mapping and configuration on the content ID and figure out the primary and mirror for each content on the cluster. Which of the following queries will you use here and on which database catalog should it be used?


Options

  • Select * from segment_configuration order by dbid;
  • Select * from gp_seg_configuration order by dbid;
  • Select * from gp_configuration_history order by dbid;
  • Select * from gp_segment_configuration order by dbid;
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Mobile Programming
FAQ
What is Data Science?
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