Data Analyst

How does the term "bootstrapping" contribute to statistical analysis?

A) By creating resampled datasets with replacement
B) By fitting multiple models to the same dataset
C) By testing the significance of correlations
D) By estimating the correlation matrix of a dataset

What is the difference between precision and recall?

A) Both measure the same thing
B) Precision focuses on false positives, recall focuses on false negatives
C) Precision focuses on false negatives, recall focuses on false positives
D) Precision and recall are unrelated metrics

What is the role of the learning_rate parameter in gradient descent optimization?

A) The speed at which the algorithm converges
B) The regularization strength applied to the model
C) The number of iterations in the optimization process
D) The size of the steps taken during each iteration

How can you create a drop-down list in Excel?

A) Using the AutoFill feature
B) Applying conditional formatting
C) Using the Data Validation feature
D) Applying a filter to a column

What will be the output of this code:-

count = 1

def doThis():

   global count

   for i in (1, 2, 3): 
       count += 1

doThis()

print (count)

Given a sorted array arr[] and an integer target, the task is to find the number of occurrences of target in given array.

Given an array arr[] consisting of only 0s, 1s, and 2s. The task is to sort the array, i.e., put all 0s first, then all 1s and all 2s in last.

Write a SQL query to print details of the Students whose first name ends with 'a'.

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What is a break, continue, and pass in Python? (Learn)