10+ NTT Security Interview Questions and Answers

Creating public and private classes in Java is useful for encapsulation and access control.

• Creating a class as public allows it to be accessed from any other class.

• Creating a class as private restricts its access to only within the same class.

• Public classes are typically used for classes that need to be accessed by other classes or modules.

• Private classes are typically used for helper classes or internal implementation details.

• The choice between public and private depends on ...read more

Functional testing focuses on the behavior of the software, while non-functional testing evaluates its performance and other quality attributes.

• Functional testing verifies if the software meets the specified functional requirements.

• Non-functional testing checks the performance, reliability, usability, and other non-functional aspects of the software.

• Functional testing is concerned with what the software does, while non-functional testing is concerned with how well it does it....read more

Schema is a blueprint that defines the structure of a database. I used the relational schema in my project.

• Schema is a logical representation of the entire database.

• It defines the tables, fields, relationships, and constraints.

• Relational schema is the most commonly used schema in databases.

• It organizes data into tables with rows and columns.

• Example: Employee table with columns like ID, Name, Age, Salary.

Different classes in Java are used to define objects and their behavior.

• Classes are the building blocks of Java programs.

• They define the properties and methods of objects.

• Some commonly used classes in Java are String, Integer, ArrayList, etc.

• Classes can be inherited to create new classes with additional features.

• Java provides a rich set of predefined classes, and developers can create their own classes.

Several levels of testing include unit, integration, system, and acceptance testing.

• Unit testing: testing individual components or modules of the software

• Integration testing: testing how different components/modules work together

• System testing: testing the entire system as a whole

• Acceptance testing: testing to ensure the software meets the requirements and is ready for release

Data can be uploaded from source to target using ETL tools or manual data entry.

• Extract data from source system

• Transform data to match target system requirements

• Load data into target system

• Use ETL tools like Informatica, Talend, or SSIS

• Manual data entry can be done through UI or APIs

SQL is a language used to manage relational databases, while ETL is a process used to extract, transform, and load data from various sources into a target database.

• SQL is used to manage data within a database, while ETL is used to move data between databases

• SQL is used to query and manipulate data, while ETL is used to transform and load data into a target database

• SQL is a language, while ETL is a process

• Examples of SQL include SELECT, INSERT, UPDATE, and DELETE statements, w...read more

Writing queries involves creating statements to retrieve data from a database.

• Identify the data you want to retrieve

• Choose the appropriate table(s) to query

• Use SQL syntax to construct the query

• Test the query to ensure it returns the desired results

A program with 8 loops

• Loops can be of different types like for, while, do-while, foreach, etc.

• The loops can be nested within each other to create complex logic.

• The program can perform various operations within the loops like printing, calculating, etc.

Joins and constraints are used in databases to link tables and enforce rules for data integrity.

• Joins are used to combine data from two or more tables based on a related column

• Constraints are rules that are applied to columns to ensure data integrity

• Types of constraints include primary key, foreign key, unique, and check constraints

• Joins can be inner, outer, left, or right depending on the data needed

• Examples of joins include inner join, left join, right join, and full outer ...read more

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows code reusability and saves time and effort in writing new code.

• The existing class is called the parent or base class, and the new class is called the child or derived class.

• The child class inherits all the properties and methods of the parent class and can also add its own unique properties and methods.

• For example, a class 'An...read more

Buffer is a temporary storage area in memory used to hold data while it is being processed or transferred.

• Buffers are used in various applications such as network communication, file I/O, and image processing.

• They help to improve performance by reducing the number of read/write operations to the main memory.

• Examples of buffer include input/output buffer, circular buffer, and double buffer.

• Buffer overflow is a common vulnerability in software that can lead to security issues.