SQL Joins

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Joins are used to combine rows from two or more tables based on related columns between them. Joins allow you to retrieve data from multiple tables simultaneously, enabling you to create complex queries that fetch data from different sources. There are different types of joins in SQL, including: INNER JOIN Returns only the rows that have matching values in both tables based on the specified join condition. It discards non-matching rows from both tables. Example:           create table t1(x int); insert into t1 values(1); insert into t1 values(1); insert into t1 values(0); create table t2(y int); insert into t2 values(0); insert into t2 values(1); insert into t2 values(1);           select * from t1 inner join t2 on t1.x = t2.y Output: 2. LEFT JOIN (or) LEFT OUTER JOIN Returns all the rows from the left (or first) table and the matching rows from the rig...
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Machine Learning Foundation - Deep Learning - Programming Assignment

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1) What’s the least common category in the training data?

a) bird
b) dog
c) cat
d) automobile

2) Of the images below, which is the nearest ‘cat’ labeled image in the training data to the the first image in the test data (image_test[0:1])?

f

3) Of the images below, which is the nearest ‘dog’ labeled image in the training data to the the first image in the test data (image_test[0:1])?

d

4) For the first image in the test data, in what range is the mean distance between this image and its 5 nearest neighbors that were labeled ‘cat’ in the training data?

a) 33 to 35
b) 35 to 37
c) 37 to 39
d) 39 to 41
e) Above 41

5) For the first image in the test data, in what range is the mean distance between this image and its 5 nearest neighbors that were labeled ‘dog’ in the training data?

a) 33 to 35
b) 35 to 37
c) 37 to 39
d) 39 to 41
e) Above 41

6) On average, is the first image in the test data closer to its 5 nearest neighbors in the ‘cat’ data or in the ‘dog’ data?

a) cat
b) dog

7) In what range is the accuracy of the 1-nearest neighbor classifier at classifying ‘dog’ images from the test set?

a) 50 to 60
b) 60 to 70
c) 70 to 80
d) 80 to 90
e) 90 to 100

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