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Visa DSA Interview Questions

139 curated coding interview questions directly asked in Visa technical rounds, sorted by frequency with recency and difficulty diagnostics.

⚡ Open Interactive Tracker (139 Problems) 🔥 Must-Solve Problem Pool 🏢 All Companies Directory

139 Total Questions

32 (23%) Easy Problems

85 (61%) Medium Problems

22 (16%) Hard Problems

🔥 Most Tested Topics:

Core DSA (49)Arrays (45)Strings (27)Trees (9)Dynamic Programming (7)

📂 Sourced Datasets:

Last 30 daysLast 3 monthsLast 6 monthsAll questionsOlder than 6 months

Showing 139 of 139 displayed

ID	Problem	Difficulty	Topic	Pattern	Acceptance	Frequency	Recency
1963	Minimum Number of Swaps to Make the String Balanced	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	78.0%	100.0%	30d
636	Exclusive Time of Functions	Medium	Core DSA	Implementation / Reasoning	66.2%	100.0%	30d
2680	Maximum OR	Medium	Arrays	Sorting / Prefix / Scan	43.0%	100.0%	30d
2964	Number of Divisible Triplet Sums	Medium	Arrays	Sorting / Prefix / Scan	67.6%	100.0%	3m
3043	Find the Length of the Longest Common Prefix	Medium	Core DSA	Implementation / Reasoning	62.2%	100.0%	6m
1861	Rotating the Box	Medium	Core DSA	Implementation / Reasoning	82.5%	100.0%	all
3459	Length of Longest V-Shaped Diagonal Segment	Hard	Core DSA	Implementation / Reasoning	56.2%	100.0%	all
2491	Divide Players Into Teams of Equal Skill	Medium	Core DSA	Implementation / Reasoning	68.9%	87.5%	3m
56	Merge Intervals	Medium	Arrays	Sorting / Prefix / Scan	51.8%	87.5%	3m
3	Longest Substring Without Repeating Characters	Medium	Strings; Trees	Hashing / Sliding Window; DFS / BFS; Sliding Window	39.1%	87.5%	3m
3035	Maximum Palindromes After Operations	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	46.5%	87.5%	3m
526	Beautiful Arrangement	Medium	Core DSA	Implementation / Reasoning	64.8%	87.5%	3m
2484	Count Palindromic Subsequences	Hard	Core DSA	Implementation / Reasoning	41.2%	87.5%	3m
146	LRU Cache	Medium	Design	Data Structure Design	47.4%	87.5%	3m
68	Text Justification	Hard	Core DSA	Implementation / Reasoning	51.2%	87.5%	6m
121	Best Time to Buy and Sell Stock	Easy	Core DSA	Implementation / Reasoning	56.8%	87.5%	6m
48	Rotate Image	Medium	Arrays	Sorting / Prefix / Scan	80.1%	87.5%	6m
3649	Number of Perfect Pairs	Medium	Core DSA	Implementation / Reasoning	34.1%	87.5%	6m
3046	Split the Array	Easy	Arrays	Sorting / Prefix / Scan	61.3%	87.5%	all
1389	Create Target Array in the Given Order	Easy	Arrays	Sorting / Prefix / Scan	86.5%	87.5%	all
3161	Block Placement Queries	Hard	Core DSA	Implementation / Reasoning	18.7%	87.5%	all
3019	Number of Changing Keys	Easy	Core DSA	Implementation / Reasoning	80.7%	75.0%	6m
15	3Sum	Medium	Arrays	Sorting / Prefix / Scan	39.1%	75.0%	6m
3651	Minimum Cost Path with Teleportations	Hard	Arrays	Sorting / Prefix / Scan	45.5%	75.0%	6m
1648	Sell Diminishing-Valued Colored Balls	Medium	Core DSA	Implementation / Reasoning	30.2%	75.0%	6m
20	Valid Parentheses	Easy	Strings	Hashing / Sliding Window	44.2%	75.0%	all
42	Trapping Rain Water	Hard	Core DSA	Two Pointers	67.4%	75.0%	all
49	Group Anagrams	Medium	Strings	Hashing / Sliding Window	72.6%	75.0%	all
1025	Divisor Game	Easy	Core DSA	Implementation / Reasoning	71.9%	75.0%	all
2049	Count Nodes With the Highest Score	Medium	Trees	DFS / BFS	52.7%	75.0%	all
2078	Two Furthest Houses With Different Colors	Easy	Core DSA	Implementation / Reasoning	71.8%	75.0%	all
2136	Earliest Possible Day of Full Bloom	Hard	Core DSA	Implementation / Reasoning	71.2%	75.0%	all
3078	Match Alphanumerical Pattern in Matrix I	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	64.8%	75.0%	all
1353	Maximum Number of Events That Can Be Attended	Medium	Arrays	Sorting / Prefix / Scan	39.0%	75.0%	all
2451	Odd String Difference	Easy	Strings	Hashing / Sliding Window	62.0%	75.0%	all
71	Simplify Path	Medium	Core DSA	Implementation / Reasoning	50.6%	75.0%	all
2672	Number of Adjacent Elements With the Same Color	Medium	Core DSA	Implementation / Reasoning	59.6%	75.0%	all
2768	Number of Black Blocks	Medium	Core DSA	Implementation / Reasoning	41.8%	75.0%	all
84	Largest Rectangle in Histogram	Hard	Core DSA	Implementation / Reasoning	49.9%	75.0%	all
3915	Maximum Sum of Alternating Subsequence With Distance at Least K	Hard	Arrays	Sorting / Prefix / Scan	31.6%	75.0%	all
1	Two Sum	Easy	Arrays	Sorting / Prefix / Scan; Two Pointers	57.5%	62.5%	6m
3071	Minimum Operations to Write the Letter Y on a Grid	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	64.6%	62.5%	6m
2817	Minimum Absolute Difference Between Elements With Constraint	Medium	Arrays	Sorting / Prefix / Scan	37.7%	62.5%	6m
53	Maximum Subarray	Medium	Arrays	Sorting / Prefix / Scan	53.3%	62.5%	6m
415	Add Strings	Easy	Strings	Hashing / Sliding Window	52.2%	62.5%	6m
560	Subarray Sum Equals K	Medium	Arrays	Sorting / Prefix / Scan	47.3%	62.5%	6m
258	Add Digits	Easy	Core DSA	Implementation / Reasoning	68.9%	62.5%	6m
5	Longest Palindromic Substring	Medium	Strings; Trees	Hashing / Sliding Window; DFS / BFS	37.8%	62.5%	6m
67	Add Binary	Easy	Core DSA	Implementation / Reasoning	58.1%	62.5%	6m
846	Hand of Straights	Medium	Core DSA	Implementation / Reasoning	58.0%	62.5%	6m
131	Palindrome Partitioning	Medium	Strings; Dynamic Programming	Hashing / Sliding Window; State Transition	74.1%	62.5%	6m
1631	Path With Minimum Effort	Medium	Arrays	Sorting / Prefix / Scan	63.2%	62.5%	6m
1529	Minimum Suffix Flips	Medium	Arrays	Sorting / Prefix / Scan	73.9%	62.5%	6m
14	Longest Common Prefix	Easy	Core DSA	Implementation / Reasoning	47.6%	62.5%	all
286	Walls and Gates	Medium	Core DSA	Implementation / Reasoning	64.0%	62.5%	all
54	Spiral Matrix	Medium	Arrays	Sorting / Prefix / Scan	56.8%	62.5%	all
200	Number of Islands	Medium	Graphs	BFS / DFS / Topological Sort	64.4%	62.5%	all
539	Minimum Time Difference	Medium	Arrays	Sorting / Prefix / Scan	62.6%	62.5%	all
206	Reverse Linked List	Easy	Linked List	Two Pointers	80.6%	62.5%	all
207	Course Schedule	Medium	Graphs	BFS / DFS / Topological Sort	51.4%	50.0%	all
1497	Check If Array Pairs Are Divisible by k	Medium	Arrays	Sorting / Prefix / Scan	46.2%	50.0%	all
543	Diameter of Binary Tree	Easy	Trees	DFS / BFS	65.5%	50.0%	all
661	Image Smoother	Easy	Core DSA	Implementation / Reasoning	69.3%	50.0%	all
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium	Arrays	Sorting / Prefix / Scan	57.7%	50.0%	all
347	Top K Frequent Elements	Medium	Heap	Priority Queue	66.4%	50.0%	all
127	Word Ladder	Hard	Strings	Hashing / Sliding Window	45.6%	50.0%	all
93	Restore IP Addresses	Medium	Core DSA	Implementation / Reasoning	56.0%	50.0%	all
11	Container With Most Water	Medium	Core DSA	Two Pointers	60.0%	50.0%	all
723	Candy Crush	Medium	Core DSA	Implementation / Reasoning	77.4%	50.0%	all
21	Merge Two Sorted Lists	Easy	Arrays; Linked List	Sorting / Prefix / Scan; Two Pointers	68.3%	50.0%	all
792	Number of Matching Subsequences	Medium	Core DSA	Implementation / Reasoning	50.6%	50.0%	all
110	Balanced Binary Tree	Easy	Trees	DFS / BFS	58.4%	50.0%	all
295	Find Median from Data Stream	Hard	Heap	Priority Queue	54.5%	50.0%	all
32	Longest Valid Parentheses	Hard	Strings	Hashing / Sliding Window	38.8%	50.0%	all
122	Best Time to Buy and Sell Stock II	Medium	Core DSA	Implementation / Reasoning	71.1%	50.0%	all
75	Sort Colors	Medium	Arrays	Sorting / Prefix / Scan	69.6%	50.0%	all
238	Product of Array Except Self	Medium	Arrays	Sorting / Prefix / Scan	68.9%	50.0%	all
202	Happy Number	Easy	Core DSA	Implementation / Reasoning	59.7%	50.0%	all
3552	Grid Teleportation Traversal	Medium	Core DSA	Implementation / Reasoning	23.6%	50.0%	all
1314	Matrix Block Sum	Medium	Arrays	Sorting / Prefix / Scan	76.5%	50.0%	all
134	Gas Station	Medium	Greedy	Greedy	48.0%	50.0%	all
4	Median of Two Sorted Arrays	Hard	Arrays; Heap	Sorting / Prefix / Scan; Priority Queue	46.6%	37.5%	all
66	Plus One	Easy	Core DSA	Implementation / Reasoning	50.0%	37.5%	all
151	Reverse Words in a String	Medium	Strings	Hashing / Sliding Window	56.4%	37.5%	all
214	Shortest Palindrome	Hard	Strings	Hashing / Sliding Window	42.5%	37.5%	all
739	Daily Temperatures	Medium	Stack / Queue	Monotonic Stack / Simulation	68.7%	37.5%	all
2593	Find Score of an Array After Marking All Elements	Medium	Arrays	Sorting / Prefix / Scan	64.5%	37.5%	all
25	Reverse Nodes in k-Group	Hard	Trees; Linked List	DFS / BFS; Two Pointers	66.1%	37.5%	all
189	Rotate Array	Medium	Arrays	Sorting / Prefix / Scan	44.9%	37.5%	all
242	Valid Anagram	Easy	Strings	Hashing / Sliding Window	68.1%	37.5%	all
123	Best Time to Buy and Sell Stock III	Hard	Core DSA	Implementation / Reasoning	53.7%	37.5%	all
162	Find Peak Element	Medium	Binary Search	Binary Search	47.0%	37.5%	all
239	Sliding Window Maximum	Hard	Arrays	Sorting / Prefix / Scan; Sliding Window	48.8%	37.5%	all
416	Partition Equal Subset Sum	Medium	Arrays; Dynamic Programming	Sorting / Prefix / Scan; State Transition	49.5%	37.5%	all
1876	Substrings of Size Three with Distinct Characters	Easy	Strings; Trees	Hashing / Sliding Window; DFS / BFS	76.7%	37.5%	all
3034	Number of Subarrays That Match a Pattern I	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	68.6%	37.5%	all
213	House Robber II	Medium	Dynamic Programming	State Transition	44.9%	37.5%	all
72	Edit Distance	Medium	Dynamic Programming	State Transition	60.6%	37.5%	all
2021	Brightest Position on Street	Medium	Trees	DFS / BFS	60.6%	37.5%	all
217	Contains Duplicate	Easy	Arrays	Sorting / Prefix / Scan	64.4%	37.5%	all
129	Sum Root to Leaf Numbers	Medium	Arrays	Sorting / Prefix / Scan	70.0%	37.5%	all
460	LFU Cache	Hard	Design	Data Structure Design	49.2%	37.5%	all
300	Longest Increasing Subsequence	Medium	Dynamic Programming	State Transition	59.4%	37.5%	all
451	Sort Characters By Frequency	Medium	Arrays; Strings	Sorting / Prefix / Scan; Hashing / Sliding Window	75.3%	37.5%	all
199	Binary Tree Right Side View	Medium	Trees	DFS / BFS	70.2%	37.5%	all
1752	Check if Array Is Sorted and Rotated	Easy	Arrays; Binary Search	Sorting / Prefix / Scan; Binary Search	57.3%	37.5%	all
215	Kth Largest Element in an Array	Medium	Arrays; Heap	Sorting / Prefix / Scan; Priority Queue	68.9%	37.5%	all
345	Reverse Vowels of a String	Easy	Strings	Hashing / Sliding Window	61.3%	37.5%	all
680	Valid Palindrome II	Easy	Strings	Hashing / Sliding Window	44.3%	37.5%	all
167	Two Sum II - Input Array Is Sorted	Medium	Arrays	Sorting / Prefix / Scan; Two Pointers	65.1%	37.5%	all
264	Ugly Number II	Medium	Core DSA	Implementation / Reasoning	49.6%	37.5%	all
62	Unique Paths	Medium	Core DSA	Implementation / Reasoning	66.8%	37.5%	all
1743	Restore the Array From Adjacent Pairs	Medium	Arrays	Sorting / Prefix / Scan	75.0%	37.5%	all
17	Letter Combinations of a Phone Number	Medium	Strings; Backtracking	Hashing / Sliding Window; Backtracking	66.1%	37.5%	all
332	Reconstruct Itinerary	Hard	Core DSA	Implementation / Reasoning	44.6%	37.5%	all
2502	Design Memory Allocator	Medium	Design	Data Structure Design	50.1%	37.5%	all
1046	Last Stone Weight	Easy	Core DSA	Implementation / Reasoning	66.5%	37.5%	all
3433	Count Mentions Per User	Medium	Core DSA	Implementation / Reasoning	50.8%	37.5%	all
3652	Best Time to Buy and Sell Stock using Strategy	Medium	Core DSA	Implementation / Reasoning	59.8%	37.5%	all
85	Maximal Rectangle	Hard	Core DSA	Implementation / Reasoning	58.8%	37.5%	all
135	Candy	Hard	Core DSA	Implementation / Reasoning	48.5%	37.5%	all
2544	Alternating Digit Sum	Easy	Arrays	Sorting / Prefix / Scan	69.1%	37.5%	all
503	Next Greater Element II	Medium	Stack / Queue	Monotonic Stack / Simulation	68.4%	37.5%	all
79	Word Search	Medium	Strings; Binary Search	Hashing / Sliding Window; Binary Search	47.4%	37.5%	all
88	Merge Sorted Array	Easy	Arrays	Sorting / Prefix / Scan	54.9%	37.5%	all
994	Rotting Oranges	Medium	Core DSA	Implementation / Reasoning	58.7%	37.5%	all
974	Subarray Sums Divisible by K	Medium	Arrays	Sorting / Prefix / Scan	56.3%	37.5%	all
128	Longest Consecutive Sequence	Medium	Core DSA	Implementation / Reasoning	47.1%	37.5%	all
125	Valid Palindrome	Easy	Strings	Hashing / Sliding Window	53.3%	37.5%	all
387	First Unique Character in a String	Easy	Strings	Hashing / Sliding Window	65.5%	37.5%	all
1922	Count Good Numbers	Medium	Core DSA	Implementation / Reasoning	57.7%	37.5%	all
435	Non-overlapping Intervals	Medium	Arrays; Greedy	Sorting / Prefix / Scan; Greedy	57.1%	37.5%	all
2530	Maximal Score After Applying K Operations	Medium	Core DSA	Implementation / Reasoning	64.1%	37.5%	all
733	Flood Fill	Easy	Core DSA	Implementation / Reasoning	68.3%	37.5%	all
253	Meeting Rooms II	Medium	Greedy	Greedy	52.7%	37.5%	all
139	Word Break	Medium	Strings; Dynamic Programming	Hashing / Sliding Window; State Transition	49.5%	37.5%	all
140	Word Break II	Hard	Strings; Dynamic Programming	Hashing / Sliding Window; State Transition	55.6%	37.5%	all
1696	Jump Game VI	Medium	Greedy	Greedy	46.4%	37.5%	all
1011	Capacity To Ship Packages Within D Days	Medium	Binary Search	Binary Search	73.9%	37.5%	all

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