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UNACADEMY Hiring Off-Campus OA (2021) Problem Maximum Number of Vowels in a Substring of Given Length
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greedy
2021
string
slidingwindow
Unacademy
26 minutes ago
Padala Indira Bhavani
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Yelp Online Assessment 2024 | Rollover Business Hours & Spam Review Detector
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TwoPointers
Yelp
HashMap
String
OA
2 days ago
Sahil Jain
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Twilio OA 2024 | Vanity Phone Numbers & Telecom Call Routing
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HashSet
String
Twilio
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PrefixTree
2 days ago
Sahil Jain
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SAMSARA Hiring | Minimum Score by Changing Two Elements Problem | Off Campus OA (2024)
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samsara
2 days ago
Padala Indira Bhavani
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RAZORPAY | Maximum Score After Splitting a String | On-Campus OA (2024)
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on-campus
razorpay
string
greedy
2 days ago
Padala Indira Bhavani
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GARENA Hiring Challenge | Off-Campus OA (2024) | Stamping the Sequence Problem
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string
grredy
2024
garena
hiring
2 days ago
Padala Indira Bhavani
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Cisco OA 2025 | Faulty Network Packet Recovery & Server Cluster Power Grid
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SlidingWindow
Matrix
Cisco
String
OA
2 days ago
Sahil Jain
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Swiggy SDE-1 OA | Weighted Job Scheduling & Recursive String Compression
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DP
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Swiggy
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2 days ago
Sahil Jain
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Arcesium OA 2023 | Reverse String & Graph Bipartition
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TwoPointers
graphs
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Arcesium
OA
2 days ago
Sahil Jain
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Mphasis Online Assessment 2025 | Corporate Registry Lexicographical Audit
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Anagram
Hashing
String
OA
Mphasis
3 days ago
Sahil Jain
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Wipro OA | Highest Altitude & String Compression | Off-Campus 2025
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TwoPointers
Greedy
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Arrays
Wipro
3 days ago
Sahil Jain
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Splunk Hiring challenge| off campus online assessment question | Decode the Message | 2024
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hashmap
2024
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splunk
4 days ago
Padala Indira Bhavani
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KPIT Technologies Online Assessment | Palindrome Validation & Pivot Index
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String
Simulation
OA
PrefixSum
KPIT
4 days ago
Sahil Jain
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RELIANCE JIO Hiring | On Campus OA (2024) | Optimal Partition of String
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on-campus
reliancejio
2024
string
6 days ago
Padala Indira Bhavani
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Johnson Controls OA 2024 | Minimum Number of Operations to Move All Balls to Each Box | Prefix Sum
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johnsoncontrols
string
prefixsum
greedy
6 days ago
Padala Indira Bhavani
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Cognizant GenC Pro OA | Data Compression Sequence Evaluator & Fleet Route Allocator
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Cognizant
Greedy
BinarySearch
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OA
6 days ago
Sahil Jain
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Eaton Corporation Hiring OA 2024 | Determine if String Halves Are Alike | String Processing
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eatoncorporation
2024
6 days ago
Padala Indira Bhavani
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Twilio OA 2025 | String Compression, Rate Limiting & BFS Routing
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SlidingWindow
BFS
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Twilio
Graph
6 days ago
Sahil Jain
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3
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NOMURA OA 2023 | Number of Good Ways to Split a String | Java Solution | Prefix & Suffix Distinct Count
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nomura
hashset
string
oa
7 days ago
Padala Indira Bhavani
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1
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Zscaler Hiring Challenge OA 2022 | Replace Words with Root (Trie-Based Stemmer)
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hashing
zscaler
tree
string
trie
7 days ago
Padala Indira Bhavani
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Juniper Networks OA 2021 | IPv4 Address Sum Overflow Check
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2021
on-campus
juniper
string
7 days ago
Padala Indira Bhavani
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Confluent OA 2025 | Message Deduplication, Sliding Window & Stack Validation
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HashMap
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Stack
Confluent
Queue
7 days ago
Sahil Jain
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Akamai OA 2025 | CDN Log Compression via Run-Length Bit-Packing & DDoS Token Bucket Rate Limiter
0 Votes | 1 Reply
Greedy
String
Akamai
Simulation
OA
7 days ago
Sahil Jain
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Wayfair OA 2025 | Inventory Coupon Matching Engine & Warehouse Automation Task Scheduler
0 Votes | 1 Reply
Trie
Wayfair
String
TopologicalSort
Graph
7 days ago
Sahil Jain
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Votes
1
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2
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EPAM Systems OA (2023) | Count Vowel Substrings of a Word | Sliding Window & HashSet
0 Votes | 1 Reply
hashset
2023
string
epam
slidingwindow
7 days ago
Padala Indira Bhavani
• 0
0
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1
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2
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Texas Instruments OA 2023 | Number of Ways to Form Target String | Dynamic Programming
0 Votes | 1 Reply
string
dp
TexasInstruments
2023
8 days ago
Padala Indira Bhavani
• 0
0
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1
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2
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QUALYS Hiring | On Campus OA (2021) | Minimum Remove to Make Valid Parentheses
0 Votes | 1 Reply
greedy
string
qualys
java
on-campus
9 days ago
Padala Indira Bhavani
• 0
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Recent Replies
Answer: POSTMAN Hiring Off-Campus | Find All Groups of Farmland Question | OA(2022)
by
Padala Indira Bhavani
• 0
Approach Whenever we encounter a farmland cell (1), it represents the top-left corner of a new farmland group. Since every farmland r…
Answer: SHARECHAT Hiring On-Campus OA (2021) | Problem Longest ZigZag Path in a Binary
by
Padala Indira Bhavani
• 0
Approach This problem can be solved efficiently using Depth First Search (DFS). At every node: If the previous move was left, t…
Answer: UNACADEMY Hiring Off-Campus OA (2021) Problem Maximum Number of Vowels in a Sub
by
Padala Indira Bhavani
• 0
Approach A brute-force approach would check every substring of length k and count vowels inside it. This would require: O(n × k)…
Answer: BROWSERSTACK Hiring On-Campus OA (2021) | Problem Bulls and Cows
by
Padala Indira Bhavani
• 0
Approach The problem requires counting: Bulls → matching digit at the same position. Cows → matching digits at differe…
Answer: Databricks SDE OA 2025 | Petabyte Scale Dot Product & Spark Cluster Job Executio
by
Sahil Jain
• 0
Solution - Petabyte Scale Dot Product Strategy Since both sparse vectors are already sorted by index, use the Two Pointer technique t…
Answer: OpenAI MTS OA 2026 | Transactional Key Value Store & Token Context Window Utiliz
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Sahil Jain
• 0
Solution - Transactional Key Value Store Strategy Maintain a stack of hash maps where each map represents a transaction layer. The…
Answer: CoinDCX SDE OA 2025 | Suspicious Transaction Ring & Smart Contract Ledger
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Sahil Jain
• 0
Solution - Suspicious Transaction Ring Strategy Model wallet transfers as a directed graph and detect whether any cycle exists. Ap…
Answer: MongoDB SDE OA 2025 | B-Tree Index Scan Intersection & MVCC Time Travel Store
by
Sahil Jain
• 0
Solution - B-Tree Index Scan Intersection Strategy Perform a K-Way Merge using a Min Heap to process sorted index scans efficiently. …
Answer: Tower Research Capital SDE-1 OA 2025 | Arbitrage Detector & Limit Order Book Mat
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Sahil Jain
• 0
Solution - Arbitrage Detector Strategy Transform multiplicative exchange rates into additive edge weights using logarithms and detect…
Answer: Uber SDE OA 2025 | Concatenated Multiples of K & Uber Surge Equilibrium
by
Sahil Jain
• 0
Solution - Concatenated Multiples of K Strategy Use Modulo Arithmetic and Length-Based Hash Maps to count valid concatenation pairs e…
Answer: Nvidia SDE OA 2025 | Semiconductor Signal Routing & Parallel Trace Routing
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Sahil Jain
• 0
Solution - Semiconductor Signal Routing Strategy Greedy Bit-by-Bit Validation combined with BFS Reachability Checking. Approach …
Answer: Unacademy SDE OA 2024 | Educator Network & Gamification Target
by
Sahil Jain
• 0
Solution - Educator Network Strategy Apply Tree Dynamic Programming using DFS and maintain two states for every node: selected and no…
Answer: Jio SDE OA 2024 | Maximize Network Points & JioFiber Grid Routing
by
Sahil Jain
• 0
Solution - Maximize Network Points Strategy Use a Greedy Stack-based approach that removes the higher-value substring first and the l…
Answer: CrowdStrike SDE-1 OA 2025 | Malicious Subnet Filtering & Bypassing the Firewall
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• 0
Solution - Malicious Subnet Filtering Strategy Store all blocked subnet prefixes in a Trie and perform efficient prefix matching for …
Answer: Dream11 SDE-1 OA 2025 | Fantasy Team Selection & Master Server Placement
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Solution - Fantasy Team Selection Strategy Use Constrained 0/1 Knapsack Dynamic Programming where both budget and number of selected …
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