Amdocs coding interview
questions, leaked.
7 problems reported across recent Amdocs interviews. Top patterns: string, hash table, dynamic programming. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Amdocs pulls from a tight problem set, and string manipulation dominates their screening. You're looking at 7 reported problems spanning easy to hard, with four of them centering on string patterns. The median difficulty skews medium, which means you won't see trivial warm-ups but also won't face a gauntlet of graph theory. If you hit a wall mid-assessment, StealthCoder surfaces a working solution in seconds while staying invisible to the proctor, buying you the mental reset you need to finish strong.
Top problems at Amdocs
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Design a 3D Binary Matrix with Efficient Layer Tracking | MEDIUM | 100.0 | 66% | Array · Hash Table · Design |
| 02 | Number of Divisible Substrings | MEDIUM | 100.0 | 73% | Hash Table · String · Counting |
| 03 | Backspace String Compare | EASY | 63.4 | 49% | Two Pointers · String · Stack |
| 04 | Second Highest Salary | MEDIUM | 63.4 | 44% | Database |
| 05 | Build Array Where You Can Find The Maximum Exactly K Comparisons | HARD | 63.4 | 67% | Dynamic Programming · Prefix Sum |
| 06 | Generate Parentheses | MEDIUM | 63.4 | 77% | String · Dynamic Programming · Backtracking |
| 07 | Rotate String | EASY | 63.4 | 64% | String · String Matching |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual Amdocs OA. The proctor cannot see it. Screen share cannot detect it. Built by an engineer at a top-10 tech company who can solve these problems cold but didn't want to trust himself in a 90-minute screen share.
Get StealthCoder- string4 · 57%
- hash table2 · 29%
- dynamic programming2 · 29%
- prefix sum2 · 29%
- array1 · 14%
- design1 · 14%
- heap priority queue1 · 14%
- matrix1 · 14%
- ordered set1 · 14%
- two pointers1 · 14%
String appears in four problems here, making it your first drill target. Hash tables and dynamic programming tie at two problems each, followed by prefix sum at two. The hard problem combines DP and prefix sum in a single prompt, so don't treat these as isolated topics. Design shows up once but bundled with heap, matrix, and ordered set in the 3D Binary Matrix problem, so that one's a full-stack challenge. Four of the seven are medium difficulty, confirming that Amdocs expects solid algorithm fundamentals but not competitive-programming extremes. Your prep should front-load string problems first, then pair DP and hash tables back-to-back. If you haven't touched prefix sum before, drill those two problems hard. StealthCoder is your hedge if a prefix-sum variant arrives live and you blank on the accumulation pattern.
Companies with similar patterns
If you prepped for Amdocs, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Amdocs.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Built by an engineer at a top-10 tech company who can solve these problems cold but didn't want to trust himself in a 90-minute screen share. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Amdocs interview FAQ
How many string problems should I solve before the Amdocs assessment?+
At least the four reported string problems. Four out of seven problems involve strings here, so this is your priority one. Backspace String Compare and Rotate String are both easy, so nail those first, then move to Number of Divisible Substrings and Generate Parentheses for the medium-difficulty reps.
Is dynamic programming essential for Amdocs?+
Yes. Two of the seven problems use DP directly, and the hard problem pairs it with prefix sum. Generate Parentheses teaches backtracking with DP, and Build Array with K Comparisons is pure DP. Spend focused time on state definition and memoization before your assessment.
What's the hardest problem I should expect?+
Build Array Where You Can Find The Maximum Exactly K Comparisons. It combines DP and prefix sum, and it's their only hard problem in the set. If you can solve this one, you're confident going in. If not, understand the DP state and prefix-sum optimization separately, then combine them.
How much time should I spend on hash tables?+
Two problems use hash tables directly. Number of Divisible Substrings pairs hash tables with prefix sum and counting. Spend one solid session on hash-table patterns for counting and lookups, then move on. Hash tables are foundational but not the spike here.
Should I study the 3D Binary Matrix design problem?+
It's one problem out of seven, but it touches six different topics. If you have time after drilling strings and DP, skim it to understand design trade-offs with heaps and ordered sets. It's a lower-frequency pattern for Amdocs, so don't let it eat your prep week.