Virtual Labs

Computer Science and Engineering Introductory Data Science Lab Experiments

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Introduction to NumPy, Arrays and Array Operations

Choose difficulty:

Beginner

Intermediate

Advanced

Why is NumPy faster than Python lists?

a: Because it stores data in contiguous memory and supports vectorized operations Explanation

Explanation

b: Because it uses built-in loops Explanation

Explanation

c: Because it stores strings efficiently Explanation

Explanation

d: Because it runs on a GPU by default Explanation

Explanation

Which statement correctly describes Python Lists compared to NumPy arrays?

a: Python lists are faster for numerical operations Explanation

Explanation

b: Python lists store data in contiguous memory Explanation

Explanation

c: Python lists are more flexible but slower for numerical tasks Explanation

Explanation

d: Python lists support vectorized mathematical operations Explanation

Explanation

Which NumPy feature allows you to avoid writing explicit Python loops for calculations?

a: Nested lists Explanation

Explanation

b: Vectorized operations Explanation

Explanation

c: DataFrames Explanation

Explanation

d: Manual indexing Explanation

Explanation

Which slicing expression retrieves the last element of a NumPy array?

a: arr[last] Explanation

Explanation

b: arr[-1] Explanation

Explanation

c: arr[::1] Explanation

Explanation

d: arr[1:] Explanation

Explanation

What does the slicing expression `arr[:, 1]` return in a 2D NumPy array?

a: All rows from column index 1 Explanation

Explanation

b: Rows 1 onward for all columns Explanation

Explanation

c: Only element at row 1, column 1 Explanation

Explanation

d: A copy of the entire array Explanation

Explanation

What is the purpose of `np.nditer()`?

a: To efficiently iterate over multi-dimensional arrays Explanation

Explanation

b: To slice arrays Explanation

Explanation

c: To create new arrays Explanation

Explanation

d: To convert arrays to lists Explanation

Explanation

Community Links Sakshat Portal Outreach Portal FAQ: Virtual Labs

AGPL 3.0 & Creative Commons (CC BY-NC-SA 4.0)