Exam Certified Data Engineer Associate topic 1 question 137 discussion

Actual exam question from Databricks's Certified Data Engineer Associate

Question #: 137
Topic #: 1

[All Certified Data Engineer Associate Questions]

Identify how the count_if function and the count where x is null can be used

Consider a table random_values with below data.

What would be the output of below query?
select count_if(col > 1) as count_a. count(*) as count_b.count(col1) as count_c from random_values col1
0
1
2

NULL -
2
3

A. 3 6 5
B. 4 6 5
C. 3 6 6
D. 4 6 6

Show Suggested Answer

Suggested Answer: A 🗳️

by jimboslims at Oct. 19, 2024, 6:31 p.m.

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MultiCloudIronMan

Highly Voted 4 months, 2 weeks ago

Selected Answer: A

count_if(col > 1): There are 3 values greater than 1 (2, 2, 3), so count_a is 3. count()*: There are 6 rows in total, so count_b is 6. count(col1): There are 5 non-null values (0, 1, 2, 2, 3), so count_c is 5.

upvoted 7 times

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Sagnikcap

Most Recent 2 months, 2 weeks ago

Selected Answer: A

Sorry but the question is not presented properly. I think it should be written like this:- select count_if(col > 1) as count_a, count(*) as count_b,count(col) as count_c from random_values

upvoted 1 times

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jimboslims

6 months, 1 week ago

table random_values with data not provided. there is no screenshot of the table.

upvoted 2 times

renshoo_shimasho

6 months ago

It's a formatting issue. The table has exactly 1 column named "col1". The power of adding in a carriage return and line feed. Definitely get why it was difficult to figure out.