Infosys Specialist Programmer Interview Questions, Process, and Tips

Three questions were asked from DP, Sliding Window and String

Q1. One coding Question implementation was asked
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Q2. Java detailed questions were asked like memory management for runtime polymorphism.
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3 hrs 3 questions based on greedy,dp and recursion

Q1. Introduction OOPS fundamentals
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Q2. Rest API 2 leetcode questions(easy and medium)
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2 competitive coding questions on mostly string and list

Q1. What is machine learning
Ans. 
Machine learning is a branch of artificial intelligence that involves developing algorithms and models that enable computers to learn from and make predictions or decisions based on data.
• Machine learning involves training algorithms to learn patterns from data and make predictions or decisions without being explicitly programmed.

• It is used in various applications such as image recognition, natural language processing, ...read more
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Q2. What is mutable objects in python
Ans. 
Mutable objects in Python are objects whose value can be changed after creation.
• Lists, dictionaries, and sets are examples of mutable objects in Python.

• Changes made to mutable objects directly affect the original object.

• Mutable objects can be modified in place using methods like append(), update(), and remove().
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Q1. Understanding of work culture
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Q2. Understanding of any further study plans
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Simple Coding round. 3 questions. Managed to solve 2/3. Basic questions but strict timing constraints.

Q1. What are you expecting from the job?
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Q2. Standard DSA questions. Binary Search, Merge Sort.
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There were 3 coding questions and 3 hours time to solve them. They were of three levels easy, medium and hard. I solved two of them.

Q1. They asked three coding questions, and questions from OS, CN, DBMS, SQL and SE.
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Q2. What is stack data structure?
Ans. 
Stack is a linear data structure that follows Last In First Out (LIFO) principle.
• Elements are added and removed from the top of the stack.

• Push operation adds an element to the top of the stack.

• Pop operation removes the top element from the stack.

• Peek operation returns the top element without removing it.

• Examples: function call stack, undo-redo operations in text editors.
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Q3. Write a program to print frequencies of elementsof an array.
Ans. 
Program to print frequencies of elements in an array.
• Create a dictionary to store the frequency of each element.

• Iterate through the array and update the frequency in the dictionary.

• Print the dictionary to display the frequency of each element.
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Q4. Swap two numbers without using third variable?
Ans. 
To swap two numbers without using third variable, use arithmetic operations.
• Add the two numbers and store the result in the first variable.

• Subtract the second variable from the sum and store the result in the second variable.

• Subtract the second variable from the original sum and store the result in the first variable.
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Q5. What is immutability in Python?
Ans. 
Immutability in Python refers to the property of objects that cannot be changed after creation.
• Immutable objects cannot be modified once created

• Immutable objects include numbers, strings, and tuples

• Immutable objects are useful for caching and as dictionary keys
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There were 2 easy - medium coding questions in only java/python with 20 mcq like 10 of java and 10 of dbms, u need to solved both

There were 3 hard coding questions one is from bit masking, 2nd one is from greedy and third one from dp+ binary search, i solved 2 only and got the opportunity for interview!

Q1. Interviewer was very friendly, he asked me two coding questions, 1. Longest consecutive subsequence and 2.check anagram. Then he asked be basic questions related to java oops cn. Advice : learn basic the...read more
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