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Coding
Theory
Quiz
Array Creation Dtypes
Integer Range With
np.arange
Junior
Nested List to Typed 2-D Array
Junior
Checkerboard Matrix Via Slicing
Junior
Interior Evenly Spaced Points
Junior
Build an Identity Matrix
Junior
Framed Border Matrix
Junior
Checkerboard via
np.tile
Mid
Coordinate Matrices With
meshgrid
Mid
Truncate Floats With
astype
Mid
Report Array Metadata Tuple
Mid
Sub-Diagonal Matrix With
np.diag
Mid
Diagonal Stripe Gradient
Mid
Structured RGBA dtype Array
Senior
Structured Meshgrid Over Unit Square
Senior
Convert C-Contiguous Array to Fortran Order
Senior
View vs Copy Semantics
Senior
Indexing Slicing Boolean Masking
Clip Negatives to Zero With
np.where
Junior
Filter Array With Boolean Mask
Junior
Gather Elements by Index
Junior
Slice Every Second Row's Last Two Columns
Junior
Non-Zero Indices With
np.nonzero
Junior
Reverse a 1-D Array With Slicing
Junior
Boolean Mask Multi-Condition Filter
Mid
In-Place Masked Negation
Mid
Paired Fancy Index Gather
Mid
Count Elements Above Threshold
Mid
Threshold Coordinates With
np.argwhere
Mid
Zero the Inner Region
Mid
Cross-Product Submatrix With
np.ix_
Senior
Piecewise Category Codes With
np.select
Senior
Per-Row Gather With
np.take_along_axis
Senior
Broadcasting Vectorization
Row-Wise Bias Broadcast Add
Junior
Multiplication Table via Broadcasting
Junior
Column-Wise Broadcast Scaling
Junior
Outer Sum Table With Broadcasting
Junior
Column Z-Score Standardization
Mid
Row-Mean Centering With
keepdims
Mid
Per-Column Min-Max Scaling
Mid
One-Hot via Equality Broadcast
Mid
Vectorize Cauchy Matrix With Broadcasting
Mid
Weight Image Channels by Broadcasting
Mid
Vectorized Pairwise Distance Matrix
Senior
Squared Distances via Gram Trick
Senior
Sample Covariance via Broadcasting
Senior
Aggregations Reductions Axis Operations
Column Sums Without a Loop
Junior
Row-Wise Mean Reduction
Junior
Column Peak-to-Peak Range
Junior
Count Non-Zero Entries Per Column
Junior
Per-Row Argmax Indices
Mid
Coordinates of the Largest Element
Mid
Moving Average via
np.cumsum
Mid
NaN-Aware Column Means
Mid
L1 Row Normalization With
keepdims
Mid
Column-Wise Weighted Average
Mid
Column Medians and Percentiles
Mid
Block-Sum via
np.add.reduceat
Senior
Grouped Mean With
np.bincount
Senior
Running Maximum With
accumulate
Senior
Reshaping Stacking Manipulation
Repeat Each Element With
np.repeat
Junior
Reshape 1-D Array Into Matrix
Junior
Stack Two Arrays As Rows
Junior
Zero Border With
np.pad
Junior
Flatten Matrix to 1-D Copy
Junior
Transpose a 2-D Array
Junior
Split Array Into Near-Equal Parts
Mid
Cyclic Array Shift With
roll_array
Mid
Rotate 2-D Array by
k*90
Degrees
Mid
Stack 2-D Arrays Into 3-D Tensor
Mid
HWC to CHW Layout Conversion
Mid
Interleave Two Arrays Elementwise
Mid
Drop A Column From 2-D Array
Mid
Reflect-Pad a 1-D Array
Senior
Assemble 2x2 Block Matrix
Senior
Insert Zeros By Strided Assignment
Senior
Linear Algebra
Normalize Rows to Unit L2 Length
Junior
Matrix Product With
@
Junior
Matrix Trace With
np.trace
Junior
Matrix Determinant With
np.linalg.det
Junior
Outer Product of Two Vectors
Junior
Solve a Linear System
Mid
Matrix Inverse With
np.linalg.inv
Mid
Matrix Rank With
matrix_rank
Mid
Vector Projection Onto
u
Mid
Matrix Power With
np.linalg.matrix_power
Mid
Vector And Matrix Norms
Mid
Best-Fit Line With
lstsq
Senior
Gram-Schmidt Orthonormalization
Senior
Rank-k SVD Approximation
Senior
Batched Matmul With
einsum
Senior
Sorting Searching Set Operations
Non-Destructive Ascending Sort
Junior
Row-Wise Ascending Sort
Junior
Argsort Permutation Indices
Junior
Sorted Distinct Values
Junior
Count Non-Zero Elements
Junior
Distinct Values and Their Counts
Mid
Top-K Largest via
argpartition
Mid
Sorted Intersection of Two Arrays
Mid
Sort 2-D Rows by Key Column
Mid
Boolean Membership Mask
Mid
Most Frequent Value With Tie-Break
Mid
Vectorized Insertion Indices
Mid
Multi-Key Row Sort With
lexsort
Senior
Order-Preserving Array Dedup
Senior
Bucketize Values With
searchsorted
Senior
First Element Exceeding Threshold
Senior
Random Statistics Numerical Methods
Seeded Integer Sampling With
default_rng
Junior
Min-Max Normalize a 1-D Array
Junior
Z-Score Standardization
Junior
Winsorize With
np.clip
Junior
Sanitize Non-Finite Array Values
Junior
Simple Moving Average With
np.convolve
Mid
Seeded Row Shuffle
Mid
Per-Bin Histogram Counts
Mid
Bin Values With
np.digitize
Mid
Grouped Sums With
bincount
Mid
Linear Interpolation With
np.interp
Mid
Pearson Correlation Matrix
Senior
IQR Outlier Mask
Senior
Polynomial Fit and Evaluate
Senior
Trapezoidal Rule Integration
Senior
Monte Carlo Pi Estimation
Senior
Top 209 NumPy Interview Questions And Answers 2025 | TechPrep