Questions and Answers: 166
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NEW QUESTION: 1
CORRECT TEXT
Problem Scenario 49 : You have been given below code snippet (do a sum of values by key}, with intermediate output.
val keysWithValuesList = Array("foo=A", "foo=A", "foo=A", "foo=A", "foo=B", "bar=C",
"bar=D", "bar=D")
val data = sc.parallelize(keysWithValuesl_ist}
//Create key value pairs
val kv = data.map(_.split("=")).map(v => (v(0), v(l))).cache()
val initialCount = 0;
val countByKey = kv.aggregateByKey(initialCount)(addToCounts, sumPartitionCounts)
Now define two functions (addToCounts, sumPartitionCounts) such, which will produce following results.
Output 1
countByKey.collect
res3: Array[(String, Int)] = Array((foo,5), (bar,3))
import scala.collection._
val initialSet = scala.collection.mutable.HashSet.empty[String]
val uniqueByKey = kv.aggregateByKey(initialSet)(addToSet, mergePartitionSets)
Now define two functions (addToSet, mergePartitionSets) such, which will produce following results.
Output 2:
uniqueByKey.collect
res4: Array[(String, scala.collection.mutable.HashSet[String])] = Array((foo,Set(B, A}},
(bar,Set(C, D}}}
Answer:
Explanation:
See the explanation for Step by Step Solution and configuration.
Explanation:
Solution :
val addToCounts = (n: Int, v: String) => n + 1
val sumPartitionCounts = (p1: Int, p2: Int} => p1 + p2
val addToSet = (s: mutable.HashSet[String], v: String) => s += v
val mergePartitionSets = (p1: mutable.HashSet[String], p2: mutable.HashSet[String]) => p1
+ += p2
NEW QUESTION: 2
You have the report shown in the following exhibit.
Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
NEW QUESTION: 3
Ein Unternehmen hat eine große Anzahl von Mitarbeitern, die einen VPN-Zugang von zu Hause aus benötigen. Welche der folgenden Lösungen eignet sich am besten zum Bereitstellen und Verwalten des Remotezugriffs?
A. Hostbasierte Firewall
B. Site-to-Site-VPN
C. Netzwerkbasierte Firewall
D. SSL VPN
Answer: D
NEW QUESTION: 4
You are the project manager of the NHQ project. Your project has a budget of $1,258,456 and is scheduled to last for three years. Your project is currently forty percent complete though it should be forty- five percent complete. In order to reach this point of the project, you have spent $525,000. Management needs a performance report regarding the NHQ project. Management is concerned that this project will be over budget upon completion. What is the estimate at completion for this project that you will need to report to management?
A. $1,312,504
B. $1,525,000
C. $787,504
D. -$62,922.80
Answer: A
Explanation:
Explanation/Reference:
Explanation:
The estimate at completion can be calculated by dividing the budget at completion by the cost performance index. Here, CPI =EV/AC=(0.40*1,258,456)/525000 = 0.95882 EAC = BAC/CPI = 1,258456/0.95882
1,312,504 What is Estimate at Completion (EAC)? Estimate at Completion (EAC) is a field that displays the final cost of the project including the actual costs and the forecast of remaining costs based on the cost performance index (CPI) so far. The formula used to calculate this estimate is as follows: ACWP+(BAC- BCWP)/CPI Incorrect Answers:
A: -$62,922.80 is the schedule variance.
C: This is not a valid calculation for this question.
D: $787,504 is the estimate to complete.