Most frequently asked infosys technical interview questions and answers in 2018

1. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
Are you keen to join the IT giant Infosys, then this blog post on career guidance, with some common technical
interview questions and answers, is just for you.
Commonly asked interview questions and answers:
1. Differentiate between C and C++:
C follows procedural programming pattern while C++ is a multi-paradigm language
C focuses on steps or procedure of the program while C++ focuses on data rather than the process.
In C, data is open while data is secured in C++. This is because of the OOP features like Data Hiding which is
absent in C.
C is a low-level language whereas C++ is a middle-level language
C uses top-down approach whereas C++ uses bottom-up approach
C is function-driven and C++ is object-driven
C++ supports function overloading whereas C does not
The NAMESPACE feature in C++ is absent in case of C

2. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018

3. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
2. Define null pointer:
In reference to computer memory, a null pointer is a command to direct a software program or
operate a system to an empty location in the computer memory. This is commonly used to
denote the end of a memory finding or processing event.
A nil pointer is a false value. E.g. 1 > 2 is a nil statement.
3. What are the 4 basics of OOP?
This is a very common technical interview questions and answers. The 4 basics of OOP are
Abstraction, Inheritance, Encapsulation, and Polymorphism.
4. What is Object-Relational DBMS?
An ORD is a database management system like a relational database, and with an object-oriented
database model: objects, classes, and inheritance are supported in a database and in the query
language.

4. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
5. The structural difference between bitmap and b-tree index?
Btree
This is made of branch and leaf nodes. Branch nodes hold prefix key value and also the link to the
leaf node. The leaf node has the indexed value and rowed.
Bitmap
It has bits for every single distinct value.
6. What is a Database Schema?
This is a set of formulas or sentences called integrity constraints imposed on a database.
7. What are the various levels of database schema?
Conceptual schema- a map of basics and their relationships.
Logical schema- this has entities with features and relations

5. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
8. Tell difference between foreign key and reference key?
Reference Key is a primary key which is referenced in the other table. Foreign Key is how you link the second table to the
primary tables Primary Key.
9. Tell me about DSN?
A Data Source Name is the logical name which is used by Open Database Connectivity to refer to the drive and other
information which is needed to access data. The name is used by Internet Information Services for a connection to an
ODBC data source, like a Microsoft SQL Server database.
10. What are the differences between the Clustered index and non clustered index?
Clustered Index
Only one per table
Fast to read than the non clustered data which is physically stored in index order
Non-Clustered Index
Used several times per table

6. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
Explain the Joins, Views, Normalization, and Triggers.
The join is used in SQL statement to query data from two or more tables, based on a relationship between certain columns
in these tables.
Tables in a database are often related to each other with keys.
A view is a virtual table. A view has rows and columns, like a real table. The fields are fields from one or more real tables in
the database.
Normalization is a method to organize data in a database. There is two purpose of normalization process: eliminate the
redundant data and ensure data dependencies make sense.
. Differentiate between socket and session.
The Socket is a mix of IP address and Port Number.
Session is a Logical connection between source and destination
Among the vast resource of questions, we have included a few of the most commonly asked ones.
With this, we conclude with our today’s blog on Infosys interview questions and answers. Hope this piece of information
helps you. Keep looking into this space by career advice for more career guidance tips, news, and updates.

7. Most Frequently asked Infosys Technical
Interview Questions and Answers in 2018
Explain the Joins, Views, Normalization, and Triggers.
The join is used in SQL statement to query data from two or more tables, based on a relationship between certain columns
in these tables.
Tables in a database are often related to each other with keys.
A view is a virtual table. A view has rows and columns, like a real table. The fields are fields from one or more real tables in
the database.
Normalization is a method to organize data in a database. There is two purpose of normalization process: eliminate the
redundant data and ensure data dependencies make sense.
. Differentiate between socket and session.
The Socket is a mix of IP address and Port Number.
Session is a Logical connection between source and destination
Among the vast resource of questions, we have included a few of the most commonly asked ones.
With this, we conclude with our today’s blog on Infosys interview questions and answers. Hope this piece of information
helps you. Keep looking into this space by career advice for more career guidance tips, news, and updates.