Informatica Business Solutions Software Engineer Interview Questions and Answers

3 questions were there

Q1. Basic questions
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Q2. Os, dbms, core concept of cs
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Q1. Core concept of cs
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Core concept of computer science is the study of algorithms and data structures.
• Algorithms are step-by-step procedures for solving problems.

• Data structures are ways to organize and store data efficiently.

• Examples include sorting algorithms like bubble sort and data structures like arrays and linked lists.
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Q1. General behavioral and situational questions about team members
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Q1. Identify if the number is positive, negative or zero
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Identify if a number is positive, negative, or zero
• Check if the number is greater than 0 to determine if it is positive

• Check if the number is less than 0 to determine if it is negative

• If the number is neither greater nor less than 0, it is zero
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Q1. Explain about OOPS concepts and in that explain the method overloading and overriding
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OOPS concepts revolve around the principles of encapsulation, inheritance, polymorphism, and abstraction. Method overloading involves multiple methods with the same name but different parameters, while method overriding involves a subclass providing a specific implementation of a method defined in its superclass.
• OOPS concepts include encapsulation, inheritance, polymorphism, and abstraction

• Method overloading allows mul...read more
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Q2. Basic questions on the language you know. For example, in C, pointers, data types etc.
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Q1. Javascript and Nodejs concepts
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Q1. Nodejs + React concepts in depth
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Q1. LRU Cache question and couple on array
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Q1. System Design question related to Lift
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Q1. Managerial, project related and SQL
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Q1. Will you be able to work in Rotational Shifts?
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Q2. How much experience do you have in SQL and Node JS.
Ans. 
I have 5 years of experience in SQL and Node JS.
• I have worked extensively with SQL databases, writing complex queries and optimizing performance.

• I am proficient in using Node JS for server-side development, building RESTful APIs and handling database operations.

• I have experience in integrating SQL databases with Node JS applications using libraries like Sequelize or Knex.

• I have successfully delivered projects that invo...read more
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Q1. What is Index in SQL?
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Indexes in SQL are data structures that improve the speed of data retrieval operations on database tables.
• Indexes are created on one or more columns of a table to allow faster searching and sorting of data.

• They work similar to the index of a book, allowing the database engine to quickly locate the data.

• Indexes can be created on primary keys, foreign keys, or any other frequently searched columns.

• They reduce the amount ...read more
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Q2. What are the different types of Normalization in DBMS?
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Normalization is a process in DBMS that eliminates data redundancy and ensures data integrity.
• Normalization is used to organize data in a database efficiently.

• There are different normal forms, such as 1NF, 2NF, 3NF, BCNF, and 4NF.

• Each normal form has specific rules and dependencies to achieve data normalization.

• Normalization helps in reducing data duplication, improving data consistency, and simplifying database mainte...read more
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Q3. What do you know about Views in mySQL?
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Views in mySQL are virtual tables that are based on the result of a query. They can be used to simplify complex queries and provide a layer of abstraction.
• Views are created using the CREATE VIEW statement.

• They are stored in the database and can be accessed like regular tables.

• Views can be used to hide complexity by encapsulating complex queries into a single view.

• They can also be used to restrict access to certain colu...read more
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Q4. What are Stored Procedures?
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Stored Procedures are precompiled database objects that contain a set of SQL statements and can be executed with a single call.
• Stored Procedures are used to encapsulate and execute frequently used SQL statements.

• They improve performance by reducing network traffic and optimizing query execution.

• They can accept input parameters and return output values.

• Stored Procedures can be used for data manipulation, data retrieval,...read more
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Q5. Tell me something about Internet of Things.
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Internet of Things (IoT) refers to the network of physical devices, vehicles, appliances, and other objects embedded with sensors, software, and connectivity.
• IoT enables devices to collect and exchange data over the internet.

• It allows for remote monitoring and control of devices and systems.

• IoT has applications in various industries such as healthcare, transportation, agriculture, and smart homes.

• Examples of IoT device...read more
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Q1. Questions about Past Experience, the projects I have worked on.
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Q2. What does JWT stand for? How do we use them?
Ans. 
JWT stands for JSON Web Token. It is a compact, URL-safe means of representing claims between two parties.
• JWT is used for authentication and authorization purposes in web applications.

• It consists of three parts: header, payload, and signature.

• The header contains the algorithm used to sign the token.

• The payload contains the claims or information about the user.

• The signature is used to verify the integrity of the token.

• J...read more
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Q3. What is the difference between Webtokens and APIs?
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Webtokens and APIs are both used in web development, but they serve different purposes.
• Webtokens are used for authentication and authorization, providing a secure way to transmit user information between client and server.

• APIs (Application Programming Interfaces) are sets of rules and protocols that allow different software applications to communicate and interact with each other.

• Webtokens are often used within APIs to...read more
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Q4. What is oAuth, what method did you use for Authentication/ Authorisation is your project?
Ans. 
oAuth is an open standard for authorization. In my project, I used the oAuth 2.0 protocol for authentication and authorization.
• oAuth is a protocol that allows users to grant limited access to their resources on one website to another website without sharing their credentials.

• It provides a secure way for users to authenticate and authorize third-party applications to access their data.

• oAuth 2.0 is the most widely used v...read more
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Q5. If the data in a table is already normalized, what can we do to further optimize is?
Ans. 
Further optimization of normalized data can be achieved through indexing, denormalization, and caching.
• Create appropriate indexes on frequently queried columns to improve query performance.

• Consider denormalizing the data by combining related tables to reduce the number of joins required.

• Implement caching mechanisms to store frequently accessed data in memory for faster retrieval.

• Use materialized views or summary tables...read more
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Q6. How do you perform indexing in a database, which column you use for indexing?
Ans. 
Indexing in a database improves query performance by creating a data structure that allows for faster data retrieval.
• Indexing involves creating an index on one or more columns of a database table.

• The column used for indexing should be chosen based on the frequency of data retrieval and the cardinality of the column.

• Columns with high selectivity and frequent data retrieval are good candidates for indexing.

• Examples of co...read more
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