True/False Exercise - Numpy | Attempts: 439

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| By Aparnasunil75

Aparnasunil75

Community Contributor

Quizzes Created: 20 | Total Attempts: 42,180

Questions: 10 | Attempts: 439 | Updated: Mar 21, 2023

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This True\/False quiz tests knowledge on NumPy, focusing on ndarray characteristics, array operations, and data manipulation techniques.

Questions and Answers

1.

Ndarray is also known as the alias array
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The statement is true because ndarray is indeed an alias for array. The term "alias" means that ndarray is another name or alternative way to refer to the same thing as array. Therefore, both terms can be used interchangeably to refer to the same data structure.

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2.

Ndarray.dataitem Size is the buffer containing the actual elements of the array.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The explanation for the given correct answer is that ndarray.dataitem Size refers to the buffer that holds the actual elements of the array. This buffer contains the data that can be accessed and manipulated using various array operations. Therefore, it is true that ndarray.dataitem Size is the buffer containing the actual elements of the array.

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3.

Transposing an array turns its rows into columns and rows into rows
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Transposing an array turns its rows into columns and columns into rows, not rows into rows. Therefore, the correct answer is False.

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4.

Sorting is to arrange the elements of an array in hierarchical order only in ascending
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement is incorrect because sorting can arrange the elements of an array in either ascending or descending order, depending on the requirement. It is not limited to arranging the elements only in ascending order. Therefore, the correct answer is False.

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5.

Concatenation means joining two or more arrays.-
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Concatenation refers to the process of combining or joining two or more arrays together. It involves taking the elements from each array and merging them into a single array, resulting in a longer array that contains all the elements from the original arrays. Therefore, the given statement that concatenation means joining two or more arrays is correct.

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6.

For element-wise operations on 2D array, size of both arrays may not be same
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
For element-wise operations on 2D arrays, the size of both arrays must be the same. This is because element-wise operations involve performing the operation between corresponding elements of the arrays. If the arrays have different sizes, it would not be possible to perform the operation for all elements, resulting in an error. Therefore, the statement "size of both arrays may not be the same" is false.

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7.

By default, numpy does sorting in descending order.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
By default, numpy does sorting in ascending order, not descending order.

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8.

In 2D array,by default, sorting is done row-wise(i.e. on axis=1)-
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
In a 2D array, by default, sorting is done row-wise. This means that when sorting the elements of the array, the sorting algorithm will consider each row as a separate entity and sort the elements within each row individually. This is indicated by setting the value of the axis parameter to 1. Therefore, the given statement "True" is correct.

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9.

In 2D array, when axis=0, sorting is done column-wise.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
When axis=0 in a 2D array, sorting is done column-wise. This means that the elements in each column of the array will be arranged in ascending or descending order, while the elements in each row will remain in their original order. Therefore, the statement "True" is correct.

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10.

Full form of .CSV is comma separated values
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given correct answer is true because the full form of .CSV is indeed "comma separated values". This file format is commonly used to store tabular data, where each value is separated by a comma. It allows for easy exchange of data between different software applications, making it widely used in data analysis and database management.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Mar 30, 2020

Quiz Created by
Aparnasunil75

True/False Exercise - Numpy

Ndarray is also known as the alias array

Ndarray.dataitem Size is the buffer containing the actual elements of the array.

Transposing an array turns its rows into columns and rows into rows

Sorting is to arrange the elements of an array in hierarchical order only in ascending

Concatenation means joining two or more arrays.-

For element-wise operations on 2D array, size of both arrays may not be same

By default, numpy does sorting in descending order.

In 2D array,by default, sorting is done row-wise(i.e. on axis=1)-

In 2D array, when axis=0, sorting is done column-wise.

Full form of .CSV is comma separated values