Visa interview questions

Longest Consecutive Sequence

Find the length of the longest run of consecutive integers in an unsorted array, with an O(n) time requirement. The core idea is to detect…

Companies: Visa, Amazon, Bloomberg, Google +1

Array · Hash Table · Union-Find

Last reported Aug 2026

Meeting Rooms II

Given a list of meeting time intervals, determine the minimum number of conference rooms required so that no meetings overlap. The core challenge is computing…

Companies: Visa, Amazon, Apple, Google +9

Array · Greedy · Heap (Priority Queue) · Prefix Sum

Last reported Aug 2026

Rate Limiting

Design and implement a rate limiting system that controls the frequency of requests from users or services. Use AI tools to assist in building the…

Companies: Visa

Last reported Jul 2026

Binary Search

Given a sorted (ascending) array of unique integers and a target value, return the index of the target or -1 if not present; the solution…

Companies: Visa, Amazon, Bloomberg, Google +1

Array · Binary Search

Last reported Jul 2026

Design a RAG Pipeline

Implement a low-level design for a Retrieval-Augmented Generation (RAG) pipeline that retrieves relevant documents and augments them with a language model to generate accurate…

Companies: Visa

Last reported Jul 2026

Design Uber

Design a ride-sharing service like Uber that allows users to request rides, matches them with nearby drivers, handles real-time tracking, and processes payments.

Companies: Visa, Airbnb, Amazon, Google +5

Last reported Jul 2026

Discuss a time when you had conflicting perspectives with teammates and how you handled it

Companies: Visa, Amazon, Anthropic, Canva +10

Last reported Jul 2026

Give me an example of a complex problem you solved with a simple solution.

Companies: Visa, Amazon, Goldman Sachs

Last reported Jul 2026

Tell me about a time you collaborated with others to achieve a shared goal

Companies: Visa, Amazon, GitHub, Google

Last reported Jul 2026

Tell me about a time you had to divide a complex project into manageable parts

Companies: Visa

Last reported Jul 2026

Group Anagrams

Group the input strings into lists of anagrams — i.e., strings that contain the same multiset of letters — and return the groups in any…

Companies: Visa, Amazon, Apple, Arize Ai +14

Array · Hash Table · Sorting · String

Last reported Jun 2026

Binary Tree Level Order Traversal

Return the values of a binary tree grouped by depth, from left to right for each level (i.e., a level-order / breadth-first traversal). For an…

Companies: Visa, Meta, Zscaler

Last reported Jun 2026

Design a 911 Call Center

Design a 911 call center system that efficiently routes emergency calls to appropriate regional police stations and schedules employees into operational slots. Focus on…

Companies: Visa, Salesforce, Uber

Last reported Jun 2026

Optimal Account Balancing

Given a list of money transfers among people, compute the minimum number of transactions required to settle all debts so every person's net balance becomes…

Companies: Visa, Pinterest, Salesforce

Array · Backtracking · Bit Manipulation · Bitmask

Last reported Jun 2026

Describe working with team members with different work styles

Companies: Visa, Amazon, Apple, Capital One +3

Last reported Jan 2026

Design a distributed rate limiter

Algorithm trade-offs (fixed window, sliding log, sliding counter, token bucket), placement, distributed atomic counting, failure modes.

Companies: Visa, Amazon, Anthropic, Apple +14

api-gateway · atomicity · Concurrency · Consistency & Availability

Last reported Jan 2026

Merge Intervals

Given a list of intervals, merge all overlapping (including touching endpoints) intervals and return the minimal set of non-overlapping intervals that cover them. Key pattern…

Companies: Visa, Amazon, Antithesis, Apple +16

Array · Quicksort · Sorting

Last reported Jan 2026

Tell me about a time when you spot an opportunity to improve your company, and you drive that

Companies: Visa, Amazon, Canva

Last reported Jan 2026

Design a visa payment network system for transaction processing

Design a payment network system that processes credit card transactions between merchants and issuing banks at scale. The system should handle transaction routing, bank…

Companies: Visa, Databricks, Nubank, Walmart

Last reported Jan 2026

Longest Common Prefix

Return the longest prefix string common to all strings in the array, or an empty string if none exists. The task reduces to comparing characters…

Companies: Visa, Amazon, Apple, Bloomberg +3

Array · String · Trie

Last reported Apr 2025

Assemble a RAG Pipeline From Provided Python Interfaces and Explain Retrieval

Companies: Visa

Embeddings & Vector Search · Retrieval-Augmented Generation

Card-Not-Present Fraud Detection for a Market Dominated by Online Spending

Companies: Visa

ML System Design · Trust & Safety