Infosys Senior Software Engineer Interview Questions and Answers

Print a given pattern using array of strings

• Use nested loops to iterate through rows and columns

• Build the pattern by adding characters based on the row and column indices

• Example: For a pattern like '12345', the first row would be '1', second row '12', and so on

Find two numbers in an array that add up to a specific target value.

• Use a hashmap to store the difference between the target value and each element in the array.

• Iterate through the array and check if the current element's complement exists in the hashmap.

• Return the indices of the two numbers that add up to the target value.

Projects are specific tasks or assignments that require a team to work together to achieve a common goal.

• Projects involve a defined scope, timeline, and budget.

• They require a team of individuals with different skills and expertise.

• Examples include developing a new software application, implementing a new system, or conducting a research study.

I have worked on a variety of tech stacks including Java Spring, React, Node.js, and MongoDB.

• Java Spring

• React

• Node.js

• MongoDB

Data fragmentation refers to the scattering of data across different locations or storage devices, making it difficult to access or manage.

• Data fragmentation can occur when data is stored in multiple databases or servers.

• It can also happen when data is divided into smaller pieces and stored in different locations.

• Fragmented data can lead to slower access times and increased complexity in managing data.

• Examples inc...read more

A record type is a data type that represents a structured collection of fields or attributes.

• Record types are used to define structured data in programming languages.

• Each field in a record type has a name and a data type.

• Record types are commonly used in database systems to represent rows in tables.

• Examples of record types include structs in C, classes in Java, and tuples in Python.

Understanding basic database concepts is crucial for software engineering roles.

• Databases store, retrieve, and manage data efficiently.

• SQL (Structured Query Language) is commonly used for relational databases.

• NoSQL databases like MongoDB are used for unstructured data.

• Normalization reduces data redundancy in relational databases.

• Indexes improve query performance but can slow down write operations.

A stream is a sequence of data elements made available over time.

• Streams are used for processing large amounts of data efficiently.

• They can be infinite or finite in nature.

• Examples include reading data from a file or network, or generating data dynamically.