Infosys Programmer Interview Questions and Answers for Freshers

Coding questions in first round

Q1. What is my background
Ans. 
I have a Bachelor's degree in Computer Science and 5 years of experience in software development.
• Bachelor's degree in Computer Science

• 5 years of experience in software development
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Q2. What is your expected salary
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Coding question 1 : list all prime number below a given number

Q1. Array vs list in java
Ans. 
Arrays have fixed size, while lists can dynamically grow. Arrays are faster for random access, while lists are better for insertion/deletion.
• Arrays have a fixed size, while lists can dynamically grow.

• Arrays are faster for random access, while lists are better for insertion/deletion.

• Example: String[] array = new String[5]; List<String> list = new ArrayList<>();
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Q2. Map vs hashset in java
Ans. 
Map is an interface that maps keys to values, while HashSet is a class that implements the Set interface using a hash table.
• Map allows key-value pairs, while HashSet only allows unique elements

• Map can have duplicate values but keys must be unique, HashSet does not allow duplicates

• Map provides key-based access to elements, HashSet does not have a key-value pair structure
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