NTT Data Interview Questions, Process, and Tips

Q1. About yourself and why join
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Merit and demerit of Machine learning ?

General Aptitude and reasoning

Q1. Oops concept, DBMS , Data Structure
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Q2. What is Normalisation?
Ans. 
Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.
• It involves dividing larger tables into smaller ones and defining relationships between them.

• Normalization helps to eliminate data inconsistencies and anomalies.

• There are different levels of normalization, such as first normal form (1NF), second normal form (2NF), and so on.

• Normalization can improve database pe...read more
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Q3. What is polimorphism?
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Polymorphism is the ability of an object to take on many forms.
• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A shape class can have multiple subclasses like circle, square, etc. and all can be treated as shapes.

• Example: A method can take an object of a parent class as a parameter and it can accept a
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Q4. What is Stack and Pre and post Tree formation
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Stack is a data structure that follows LIFO. Pre and post tree formation are methods of traversing a tree.
• Stack is used for backtracking, undoing, and recursion.

• Pre-order traversal visits the root node first, then left subtree, then right subtree.

• Post-order traversal visits the left subtree, then right subtree, then root node.
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Q1. Tell me about yourself
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Q2. Tell me About company ?
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Q1. What is Networking how dns cluster works in Linux?
Ans. 
Networking is the practice of connecting devices to share resources. DNS cluster in Linux is a group of DNS servers that work together.
• Networking involves connecting devices to share resources such as files, printers, and internet access.

• DNS cluster in Linux is a group of DNS servers that work together to provide high availability and load balancing for DNS queries.

• DNS cluster can be configured using tools like BIND an...read more
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Q2. What are backups? what are ports?
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Backups are copies of data that can be used to restore the original data in case of data loss or corruption. Ports are communication endpoints used for network connections.
• Backups are essential for data recovery in case of disasters or system failures

• Ports are identified by numbers and are used to establish connections between devices

• Common ports include HTTP (80), HTTPS (443), SSH (22), FTP (21), etc.
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Q1. What are technologies you have worked so far
Ans. 
I have worked with a variety of technologies including Java, Python, SQL, AWS, and Docker.
• Proficient in Java and Python programming languages

• Experience with SQL databases and data modeling

• Familiarity with AWS cloud services and infrastructure

• Knowledge of containerization using Docker

• Experience with version control using Git
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Q2. Project based question
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It was easy to answer all the questions,basics of aptitude

There were 10 members in the gd and it went smoothly

Q1. Asked about my project
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Q2. About project , willing to relocate and some other project related questions
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Q1. Different types of joins in SQL.
Ans. 
Different types of joins in SQL include inner join, outer join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Outer join: Returns all rows when there is a match in one of the tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full j...read more
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Q2. Write a test case in selenium.
Ans. 
Test case to verify login functionality on a website using Selenium
• Open the browser and navigate to the login page

• Enter valid username and password

• Click on the login button

• Verify that user is successfully logged in
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Q3. What is selenium and what sort of applications we use this for?
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Selenium is a popular open-source tool used for automating web browsers.
• Selenium is used for automating web application testing.

• It supports multiple programming languages like Java, Python, C#, etc.

• Selenium can interact with different browsers like Chrome, Firefox, Safari, etc.

• It can automate repetitive tasks such as form filling, clicking buttons, navigating through web pages, etc.

• Selenium is widely used in software d...read more
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