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Solutions & Support Engineer

Amazon

2 rounds | 3 Coding
problems

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Interview preparation journey

Preparation

Duration: 3 months

Topics: Data structures & algorithms, Computer networks, COA, Web development

Tip

Tip 1 : Practice DSA a lot

Tip 2 : Have good knowledge about your projects and don't copy them.

Tip 3 : Revise core subjects before the interview

Application process

Where: Campus

Eligibility:

Resume tip

Tip 1 : Write only those things that you know well.

Tip 2 : Do not exaggerate your skills

Tip 3 : Include your projects at least two minimum

Interview rounds

01

Round

Easy

Online Coding Interview

Duration90 minutes

Interview date15 Jul 2022

Problems2

Rod cutting problem

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Problem approach

Method 1 : A naive solution to this problem is to generate all configurations of different pieces and find the highest-priced configuration. This solution is exponential in terms of time complexity. Let us see how this problem possesses both important properties of a Dynamic Programming (DP) Problem and can efficiently be solved using Dynamic Programming.

Coin Change(Finite Supply)

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Problem approach

We have 2 choices for a coin of a particular denomination, either i) to include, or ii) to exclude.

If we are at coins[n-1], we can take as many instances of that coin ( unbounded inclusion ) i.e count(coins, n, sum – coins[n-1] ); then we move to coins[n-2].

After moving to coins[n-2], we can’t move back and can’t make choices for coins[n-1] i.e count(coins, n-1, sum).

Fin...

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02

Round

Medium

Video Call

Duration60 minutes

Interview date7 Sep 2022

Problems1

Painting Fences

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Problem approach

diff = no of ways when color of last

two posts is different

same = no of ways when color of last

two posts is same

total ways = diff + same

for n = 1

diff = k, same = 0

total = k

for n = 2

diff = k * (k-1) //k choices for

first post, k-1 for next

same = k //k choices for common

color of two posts

total = k + k * (k-1)

for n = 3

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