Tensor creation (torch.tensor, zeros, ones, rand) in PyTorch - Cheat Sheet & Quick Revision

Recall & Review

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What does torch.tensor() do in PyTorch?

It creates a tensor from a Python list or array with the exact values you provide.

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How do torch.zeros() and torch.ones() differ?

torch.zeros() creates a tensor filled with zeros, while torch.ones() creates a tensor filled with ones.

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What kind of values does torch.rand() generate?

It generates a tensor with random values between 0 and 1, following a uniform distribution.

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Why is tensor creation important in machine learning?

Tensors hold data like images or numbers that models learn from. Creating tensors correctly helps models train and predict well.

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How do you specify the shape of a tensor when using torch.zeros()?

You pass the shape as separate arguments or as a tuple, like torch.zeros(2, 3) or torch.zeros((2, 3)) to create a 2 by 3 tensor filled with zeros.

Which function creates a tensor with all elements set to one?

A torch.tensor()

B torch.zeros()

C torch.rand()

D torch.ones()

torch.ones() creates a tensor filled with ones.

What does torch.rand((3,2)) produce?

A A 3x2 tensor with random values between 0 and 1

B A 3x2 tensor filled with zeros

C A 3x2 tensor filled with ones

D A tensor created from a Python list

torch.rand() creates a tensor with random values between 0 and 1.

How do you create a tensor from a Python list [1, 2, 3]?

A torch.rand([1, 2, 3])

B torch.tensor([1, 2, 3])

C torch.ones([1, 2, 3])

D torch.zeros([1, 2, 3])

torch.tensor() creates a tensor from the exact values in the list.

Which function would you use to create a tensor filled with zeros of shape (4, 5)?

A torch.zeros((4, 5))

B torch.ones((4, 5))

C torch.rand((4, 5))

D torch.tensor((4, 5))

torch.zeros() creates a tensor filled with zeros of the given shape.

What is the range of values generated by torch.rand()?

A Between -1 and 1

B Only zeros

C Between 0 and 1

D Only ones

torch.rand() generates random values uniformly between 0 and 1.

Explain how to create a tensor filled with ones of shape (3, 4) using PyTorch.

Think about the function that fills with ones and how to specify size.

Describe the difference between torch.tensor() and torch.rand().

One uses your data, the other creates random numbers.