Infosys private limited interview experience Real time questions & tips from candidates to crack your interview
System Engineer
Infosys private limited
2 rounds | 3 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 1 month
Topics: Data Structures, Pointers, OOPS, System Design, Algorithms, Dynamic Programming.
Tip 1 : Good Knowledge of Time and Space Complexity
Tip 2 : Practice DSA Questions
Application process
Where: Campus
Eligibility: No criteria
Tip 1 : Have some projects on your resume.
Tip 2 : Do not put false things on your resume.
Interview rounds
01
Round
Medium
Online Coding Interview
Duration50 minutes
Interview date2 Oct 2019
Coding problem1
1. MCQ Questions
5 sections (Mathematics Ability, Logical Reasoning, Verbal Ability, Pseudocode, and Puzzles).
Number Of MCQs - 70
02
Round
Easy
Face to Face
Duration60 minutes
Interview date4 Sep 2019
Coding problem2
1. N-th Fibonacci Number
Moderate
40m average time
70% success
0/80
Asked in companies
You are given an integer ‘N’, your task is to find and return the N’th Fibonacci number using matrix exponentiation.
Since the answer can be very large, return the answer modulo 10^9 +7.
Fibonacci number is calculated using the following formula:
F(n) = F(n-1) + F(n-2),
Where, F(1) = F(2) = 1.
For Example:
For ‘N’ = 5, the output will be 5.
Problem approach
A direct recursive implementation.
2. Heap Sort
Easy
15m average time
85% success
0/40
Asked in companies
You are given an array ‘ARR’ consisting of 'N' integers, and your task is to sort the given array in non-decreasing order using the Heap sort algorithm.
Problem approach
Step 1) Build a max heap from the input data.
Step 2) At this point, the largest item is stored at the root of the heap. Replace it with the last item of the heap followed by reducing the size of heap by 1. Finally, heapify the root of the tree.
Step 3) Repeat step 2 while the size of the heap is greater than 1.
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Skill covered: Programming
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