NTT Data System Engineer Interview Questions and Answers

Q1. Tell me P2P cycle
Ans. 
P2P cycle refers to Procure-to-Pay cycle, which involves the process of obtaining goods or services from a vendor and paying for them.
• Purchase requisition is created to request goods or services

• Purchase order is issued to the vendor

• Goods or services are received and inspected

• Invoice is received from the vendor

• Payment is made to the vendor
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Q2. What is GL accounts
Ans. 
GL accounts are used in accounting to track financial transactions and categorize them into different types of assets, liabilities, equity, revenue, and expenses.
• GL accounts are part of the general ledger, which is a complete record of all financial transactions of a company.

• Each GL account has a unique number and name to identify it.

• GL accounts are used to organize financial information and prepare financial statement...read more
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Medium level question where asked in this round.

1 medium 1 hard question and had a good structured question.

Question on strings, logic gates

Q1. What is oops and strings
Ans. 
OOPs (Object-Oriented Programming) is a programming paradigm that uses objects to represent and manipulate data. Strings are sequences of characters.
• OOPs is a programming approach that focuses on creating reusable objects with properties and behaviors.

• Strings are a data type used to represent sequences of characters.

• OOPs allows for encapsulation, inheritance, and polymorphism.

• Strings can be manipulated using various st...read more
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Aptitude TesT - logically things, IQ level

Given one topic. Need to discussion. And Debet

Q1. Technically Question
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Q2. Topology, Network, IP address, Sub net mast, Java, DBA, C , C++
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Q1. Overall about your self
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Learn some coding language like python and Java
And SAP ABAP

Q1. What is the use of static word in java
Ans. 
Static keyword in Java is used to create class-level variables and methods.
• Static variables and methods belong to the class rather than the instance of the class.

• Static variables are initialized only once at the start of the program.

• Static methods can be called without creating an instance of the class.

• Static keyword can also be used to create static blocks that are executed only once when the class is loaded.

• Example: ...read more
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Q2. Can we implement multiple interfaces in a single Java class?
Ans. 
Yes, Java supports multiple interface implementation in a single class.
• A class can implement multiple interfaces separated by a comma.

• All the methods of the implemented interfaces must be implemented in the class.

• Example: public class MyClass implements Interface1, Interface2 { }
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Q3. What is the “Diamond problem” in Java?
Ans. 
Diamond problem is a multiple inheritance issue in Java where two classes have a common parent class and a subclass inherits from both.
• Occurs when two classes have a common parent class and a subclass inherits from both

• Results in ambiguity and conflicts in method and variable resolution

• Solved in Java by implementing interfaces instead of multiple inheritance
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Round duration - 140 minutes
This round was based on Aptitude, Verbal, logical reasoning, essay writing and 2 coding questions(easy).
This year instead of providing a separate section for quants, logical and verbal there is only one section i.e; Aptitude Section, which will include all the three-section having some questions from every section.

Q1. Aptitude Test (48 mins) Quants Verbal Logical Coding (60 mins) C C++ JAVA Python
Ans. 
Question about aptitude test and coding languages for System Engineer position.
• The question is about the aptitude test which includes quants, verbal, logical, and coding.

• The coding section includes C, C++, JAVA, and Python.

• The candidate should be familiar with all the mentioned languages.

• The time limit for the aptitude test is 48 minutes and for the coding section is 60 minutes.
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Q2. Written Communication Test (20 mins)
Ans. 
Describe the process you follow to troubleshoot a system issue.
• Identify the problem and gather information

• Analyze the data and determine possible causes

• Develop and implement a solution

• Test the solution and verify if it resolves the issue

• Document the process and solution for future reference
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Round duration - 30 minutes
This is basically an Interview round which is to know about the technical skills of the candidate.

Q1. Tell me about yourself.
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Q2. OOPs concepts with implementation
Ans. 
OOPs concepts are fundamental to software engineering. They include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to take on multiple forms and behave differently based on the context.

• Encapsulation is the practice of hiding implementation details and exposing only necessary information.

• Abstraction is...read more
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Q3. SQL (joins, basic queries)
Ans. 
SQL joins and basic queries
• Joins are used to combine data from two or more tables based on a related column

• Basic queries include SELECT, FROM, WHERE, GROUP BY, HAVING, and ORDER BY clauses

• Use aliases to simplify column names and improve readability

• Avoid using SELECT * as it can slow down the query

• Use indexes to improve query performance
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Q4. Difference between list and array

Ans. 

Arrays are fixed in size and can store multiple data types, while lists are dynamic and can only store one data type.

• Arrays are declared with a fixed size, while lists can grow or shrink dynamically.

• Arrays can store multiple data types, while lists can only store one data type.

• Arrays are accessed using an index, while lists are accessed using an iterator.

• Example: int[] arr = new int[5]; List list = new ArrayList<>();

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