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Nielsen LeetCode Interview Questions

Practice 35 real coding problems frequently asked in Nielsen technical interviews. Master these questions to ace your next Nielsen software engineering interview.

7 Easy
24 Medium
4 Hard

Top Topics at Nielsen

ArrayHash TableDepth-First SearchBreadth-First SearchTwo Pointers

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Nielsen Interview Problems

ProblemDifficultyDiffFrequencyTopicsAction
Gas Station
100%
MediumM
100%
ArrayGreedy
Solve→
Copy List with Random Pointer
96%
MediumM
96%
Hash TableLinked List
Solve→
Reverse Words in a String
93%
MediumM
93%
Two PointersString
Solve→
Ransom Note
90%
EasyE
90%
Hash TableString+1
Solve→
Remove Duplicates from Sorted Array II
83%
MediumM
83%
ArrayTwo Pointers
Solve→
Jump Game II
82%
MediumM
82%
ArrayDynamic Programming+1
Solve→
Best Time to Buy and Sell Stock
81%
EasyE
81%
ArrayDynamic Programming
Solve→
Maximum Number of Occurrences of a Substring
80%
MediumM
80%
Hash TableString+1
Solve→
Top K Frequent Elements
79%
MediumM
79%
ArrayHash Table+6
Solve→
Merge k Sorted Lists
78%
HardH
78%
Linked ListDivide and Conquer+2
Solve→
Pascal's Triangle
78%
EasyE
78%
ArrayDynamic Programming
Solve→
Rank Transform of a Matrix
77%
HardH
77%
ArrayUnion Find+4
Solve→
Number of Distinct Islands
73%
MediumM
73%
Hash TableDepth-First Search+3
Solve→
Convert Binary Search Tree to Sorted Doubly Linked List
73%
MediumM
73%
Linked ListStack+5
Solve→
Binary Tree Zigzag Level Order Traversal
69%
MediumM
69%
TreeBreadth-First Search+1
Solve→
Check If a Word Occurs As a Prefix of Any Word in a Sentence
66%
EasyE
66%
Two PointersString+1
Solve→
Continuous Subarray Sum
60%
MediumM
60%
ArrayHash Table+2
Solve→
Coin Change
58%
MediumM
58%
ArrayDynamic Programming+1
Solve→
Asteroid Collision
56%
MediumM
56%
ArrayStack+1
Solve→
Lowest Common Ancestor of a Binary Search Tree
56%
MediumM
56%
TreeDepth-First Search+2
Solve→
Kth Smallest Element in a Sorted Matrix
55%
MediumM
55%
ArrayBinary Search+3
Solve→
The kth Factor of n
54%
MediumM
54%
MathNumber Theory
Solve→
Sort Colors
54%
MediumM
54%
ArrayTwo Pointers+1
Solve→
Valid Word Abbreviation
53%
EasyE
53%
Two PointersString
Solve→
Clone Graph
53%
MediumM
53%
Hash TableDepth-First Search+2
Solve→

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Same Tree
44%
EasyE
44%
TreeDepth-First Search+2
Solve→
Binary Tree Maximum Path Sum
42%
HardH
42%
Dynamic ProgrammingTree+2
Solve→
Number of Islands
33%
MediumM
33%
ArrayDepth-First Search+3
Solve→
Spiral Matrix
32%
MediumM
32%
ArrayMatrix+1
Solve→
Maximize Amount After Two Days of Conversions
28%
MediumM
28%
ArrayString+3
Solve→
Palindrome Number
27%
EasyE
27%
Math
Solve→
Combination Sum II
27%
MediumM
27%
ArrayBacktracking
Solve→
All O`one Data Structure
24%
HardH
24%
Hash TableLinked List+2
Solve→
K-diff Pairs in an Array
23%
MediumM
23%
ArrayHash Table+3
Solve→
Unique Paths
20%
MediumM
20%
MathDynamic Programming+1
Solve→

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Frequently Asked Questions

What LeetCode problems does Nielsen ask in interviews?

Nielsen commonly asks 35 coding problems in technical interviews, including Gas Station, Copy List with Random Pointer, Reverse Words in a String. The difficulty breakdown is 7 Easy, 24 Medium, and 4 Hard problems.

How should I prepare for a Nielsen coding interview?

Focus on the most frequently asked problems first, especially those with high frequency scores. Nielsen interviews typically emphasize Array and Hash Table. Practice explaining your thought process while coding.

What is the difficulty level of Nielsen coding interviews?

Based on our data, Nielsen interviews include 7 Easy (20%), 24 Medium (69%), and 4 Hard (11%) problems.

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