10+ Automatic Data Processing (ADP) Interview Questions and Answers

Yes, SQL can be used in databases.

• SQL stands for Structured Query Language and is used to manage and manipulate data in relational databases.

• It can be used to create, modify, and delete tables, as well as insert, update, and retrieve data.

• Examples of popular relational database management systems that use SQL include MySQL, Oracle, and Microsoft SQL Server.

Code to find sum of digits of a number until sum becomes single digit

• Use a while loop to keep adding the digits of the number until the sum becomes a single digit

• Convert the number to a string to easily access individual digits

• Keep track of the sum and update it in each iteration

• Repeat the process until the sum is less than 10

Software development cycle is a process that software goes through from conception to deployment and maintenance.

• Includes stages like planning, design, development, testing, deployment, and maintenance.

• Iterative process where feedback is used to improve the software.

• Examples: Waterfall model, Agile methodology, DevOps.

• Ensures that software meets requirements, is bug-free, and is delivered on time and within budget.

Software is developed through a process involving planning, designing, coding, testing, and maintenance.

• Planning: Define requirements and create a project plan.

• Design: Create a detailed design of the software architecture.

• Coding: Write the actual code based on the design.

• Testing: Test the software for bugs and errors.

• Maintenance: Update and improve the software as needed.

• Examples: Agile, Waterfall, Scrum methodologies.

Overloading is the ability to define multiple methods in the same class with the same name but different parameters.

• Overloading allows a class to have multiple methods with the same name but different parameters.

• The compiler determines which method to call based on the number and type of arguments passed.

• Example: having multiple constructors in a class with different parameter lists.

The internet is a global network of interconnected computers that communicate through standardized protocols.

• The internet is made up of a vast network of computers connected through physical cables, wireless signals, and satellite links.

• Data is transmitted across the internet using protocols such as TCP/IP, HTTP, and FTP.

• Routers and servers help direct and manage the flow of data across the internet.

• Domain names and IP addresses are used to identify and locate resources on th...read more

OOPs concepts refer to the principles of Object-Oriented Programming, including inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

Synchronised is a keyword in Java used to control access to shared resources by multiple threads.

• Synchronised keyword is used in Java to create synchronized blocks of code, ensuring only one thread can access it at a time.

• It can be applied to methods or code blocks.

• Example: synchronized void myMethod() { // code here }

Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.

• Allows a class to inherit properties and behaviors from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can access public and protected members of the base class

• Example: Class 'Car' can inherit from class 'Vehicle' to reuse common attributes like 'color' and 'speed'