Certification preparation Archives - Talend Expert

Data Preparation with KNIME

Utilizing the 003001_SimpleFlow_with_Statistics workflow – if we are interested only in the 35-45 working age group. What is the mean capital-loss? 152.6 134.9 187.7 1 point 2.  If we ask the same question but limit it only to people with doctorate degrees – what would be the mean capital loss? 208.6 203.4 201.9 203.7 1 point 3.  Utilizing the 003002_StandardProcessing and editing the Nominal Value Row Filter node (#7) in the workflow, what is the highest Hours-per-week for the…

Read More >

Coursera : Spark Lesson 3

Coursera : Spark Lesson 3   Check all true statements about the Directed Acyclic Graph Scheduler   Each transformation is executed as soon as it is called on a RDD The DAG is managed by the cluster manager A DAG is used to track dependencies of each partition of each RDD If a partition is lost, the DAG is traversed forward to check what other steps are affected Why is building a DAG necessary in Spark but not in…

Read More >

Data Science Basics

Find below the results for this Quiz 1.  What is Data Science?   Multidisciplinary Just another way to describe statisticians A relatively new discipline Extraction of knowledge from large volumes of data   2.  Which one of the V’s below does NOT describe one of the 4 major characteristics of Big Data?   Volume Variety Velocity Viscosity Veracity 3.  Correlation implies Causality?   True False 4.  According to the McKinsey’s “Big Data Report”, by 2018 what is the forecast…

Read More >