Google Online Assessments have a very recognizable pattern: a relatively small question bank, frequent repeats, and stable difficulty. In most cases, candidates encounter one of two common sets of problems. If your approach is correct, finishing each question within 10 minutes is completely achievable.
Today, we’re sharing two high-frequency Google OA questions along with their optimal solutions. If you see them during the test, you should be able to code them almost instantly.
Question 1: Partition a Sorted Array
Problem
Find all valid partition points such that the maximum value of the left partition is less than or equal to the minimum value of the right partition.
Optimal Approach — O(N)
- Precompute a prefix maximum array.
- Precompute a suffix minimum array.
- Traverse each possible split position and check whether:
prefix_max[i] <= suffix_min[i + 1]If the condition holds, count the partition.
The logic is straightforward, requires no complex data structures, and results in very short code — exactly the kind of fundamental array problem Google prefers.
Question 2: Closest Array Sum to Zero
Problem
You may flip the sign of any single element in the array. After the operation, return the array sum that is closest to zero.
Optimal Approach
- Compute the original total sum
sum. - Enumerate each element
num. - If flipped, the new sum becomes:
new_sum = sum - 2 * numAmong all possibilities, choose the result with the smallest absolute value.
This problem is essentially a math transformation plus a single traversal — linear time, clean implementation, and zero unnecessary complexity.
Common OA Pain Points
Many candidates are strong in algorithms but still struggle during the actual OA environment:
- You know the solution — but freeze for 10 minutes under pressure.
- Your initial direction is slightly off, and the code becomes messy.
- A tiny bug eats up valuable time.
- Poor time allocation prevents you from finishing the test.
For companies like Google, Amazon, Meta, and Microsoft, OA pacing is extremely tight. Consistent execution often matters more than raw problem-solving ability.
A Smarter Way to Stay Stable During OA
Many candidates targeting top tech companies prepare an additional safety strategy ahead of time — something designed to help them stay calm and focused during high-pressure assessments.
Rather than interfering with the exam process, it functions more like real-time problem-solving navigation:
- Timely hints at critical moments
- Quick course correction if your approach drifts
- Help avoiding time-consuming dead ends
- Better pacing throughout the test
In a stressful OA setting, maintaining your normal practice performance is often the difference between passing and failing.
If your goal is Google, Amazon, Meta, or Microsoft — and you don’t want the OA to become the stage where things go wrong — preparing a more reliable strategy can significantly improve your margin for success.
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