Top 20 ServiceNow Developer Interview Questions and Answers

ServiceNow is a leading platform for digital workflows, and ServiceNow developers play a crucial role in its implementation and customization. Whether you’re preparing for a ServiceNow developer interview or aiming to enhance your knowledge, this comprehensive guide provides a curated list of the top 20 ServiceNow developer interview questions along with detailed answers.

Introduction to ServiceNow Developer Interviews

ServiceNow developer interviews typically assess candidates’ proficiency in ServiceNow platform fundamentals, development best practices, and problem-solving skills. By familiarizing yourself with common interview questions and preparing thorough responses, you can confidently navigate the interview process and showcase your expertise.

Top 20 ServiceNow Developer Interview Questions and Answers

What is ServiceNow, and what are its key features?

ServiceNow is a cloud-based platform that offers a range of IT service management (ITSM) and business management solutions. Its key features include incident management, change management, service catalog, asset management, workflow automation, and integration capabilities.

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Explain the ServiceNow development lifecycle.

The ServiceNow development lifecycle consists of stages such as requirements gathering, design, development, testing, deployment, and maintenance. Developers use ServiceNow Studio or other development environments to build and customize applications, following best practices and adhering to company policies.

What is GlideRecord, and how do you use it in ServiceNow development?

GlideRecord is a ServiceNow API used for database operations. Developers use GlideRecord to perform CRUD (Create, Read, Update, Delete) operations on ServiceNow tables. It allows developers to query records, apply conditions, and update or delete records programmatically.

Differentiate between UI Policies and Client Scripts in ServiceNow.

UI Policies are used to dynamically change the behavior of form elements based on defined conditions. They run on the client side and can hide, disable, or make fields mandatory.

Client Scripts are JavaScript scripts that run on the client side when a form is loaded, submitted, or changed. They can manipulate form fields, display messages, or perform validations.

How do you create a Business Rule in ServiceNow, and what are its types?

Business Rules in ServiceNow are created using the “Business Rules” module in the ServiceNow Studio. They are server-side scripts that run when records are inserted, updated, or deleted. The types of Business Rules include “Before” Business Rules, “After” Business Rules, and “Async” Business Rules.

What is the difference between a UI Action and a UI Policy in ServiceNow?

UI Actions are buttons or links added to forms or lists in ServiceNow. They allow users to perform actions such as creating records, updating fields, or executing scripts. UI Actions run on the server side.

UI Policies, on the other hand, are used to dynamically change the behavior of form elements based on conditions. They run on the client side and can hide, disable, or make fields mandatory.

Describe the concept of ServiceNow Scoped Applications.

Scoped Applications in ServiceNow are self-contained application modules that encapsulate customizations, configurations, and business logic. They prevent conflicts and promote modularity by isolating their components from other applications. Scoped Applications have their own namespaces and can be easily migrated between instances.

Explain the purpose of Data Policies in ServiceNow.

Data Policies in ServiceNow are used to enforce data validation rules and standards. They define conditions that records must meet to be considered valid. Data Policies can enforce mandatory fields, unique values, data formats, and other constraints.

What is the use of ACLs (Access Control Lists) in ServiceNow?

Access Control Lists (ACLs) in ServiceNow regulate access to records and fields based on user roles and permissions. They define who can read, write, create, or delete records and control visibility and editability at a granular level.

How do you handle asynchronous processes in ServiceNow?

Asynchronous processes in ServiceNow, such as background scripts, scheduled jobs, and asynchronous business rules, are handled using asynchronous APIs and execution contexts. Developers use GlideSystem methods like gs.sleep() and gs.eventQueue() to manage asynchronous tasks efficiently.

What are Catalog Items in ServiceNow, and how do you create them?

Catalog Items in ServiceNow represent products, services, or requests that users can order or fulfill through the Service Catalog. They can include items such as hardware, software, services, or requests for assistance. Catalog Items are created and configured using the “Service Catalog” module in ServiceNow.

Explain the role of ServiceNow Integration Hub in application integration.

The ServiceNow Integration Hub is a centralized platform for building, managing, and monitoring integrations between ServiceNow and external systems. It provides pre-built connectors, integration templates, and orchestration workflows to streamline the integration process and automate data exchange between systems.

What is ServiceNow MID Server, and when is it used?

The ServiceNow MID Server (Mid-Server) is a lightweight application installed on a server within an organization’s network. It acts as a bridge between external systems and the ServiceNow instance, facilitating secure communication and data transfer. MID Servers are used for integrating ServiceNow with on-premises systems, handling large data volumes, and executing complex business logic.

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Describe the difference between Business Rules and Client Scripts in ServiceNow.

Business Rules in ServiceNow are server-side scripts that execute when records are inserted, updated, or deleted. They are used to enforce business logic and automate processes on the server side.

Client Scripts, on the other hand, are JavaScript scripts that execute on the client side when forms are loaded, submitted, or changed. They are used to enhance user experience, perform client-side validations, and manipulate form elements dynamically.

How do you troubleshoot performance issues in ServiceNow?

Troubleshooting performance issues in ServiceNow involves analyzing system logs, monitoring system metrics, and identifying potential bottlenecks. Techniques include optimizing database queries, tuning server configurations, and caching frequently accessed data to improve overall system performance.

What is the role of Transform Maps in ServiceNow Import Sets?

Transform Maps in ServiceNow Import Sets define the mapping between data fields in an external data source and ServiceNow tables. They specify how data from import sets is transformed and loaded into target tables in the ServiceNow instance. Transform Maps facilitate data import, data transformation, and data synchronization processes.

Explain the concept of Record Producers in ServiceNow Service Catalog.

Record Producers in ServiceNow Service Catalog allow users to create records in ServiceNow tables through a user-friendly interface. They provide a simplified form-based approach for users to request services, submit incidents, or initiate workflows. Record Producers streamline service request processes and improve user experience in the Service Catalog.

How do you integrate ServiceNow with external systems using REST APIs?

Integrating ServiceNow with external systems using REST APIs involves creating REST message records and REST API endpoints in ServiceNow. Developers use REST APIs to send and receive data between ServiceNow and external systems, leveraging HTTP methods like GET, POST, PUT, and DELETE for data exchange and synchronization.

Describe the role of Events and Event Management in ServiceNow.

Events in ServiceNow represent occurrences or incidents that require attention or action. Event Management in ServiceNow includes processes and tools for monitoring, analyzing, and responding to events in real-time. It involves event correlation, alerting, and incident management to ensure timely resolution and minimize service disruptions.

What are the best practices for ServiceNow customization and development?

Best practices for ServiceNow customization and development include following ServiceNow’s recommended development methodologies, adhering to platform standards and guidelines, documenting customizations thoroughly, leveraging out-of-the-box features whenever possible, and prioritizing maintainability, scalability, and performance in solution design.

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Preparing for a ServiceNow developer interview requires a solid understanding of the platform’s core concepts, development principles, and best practices. By reviewing and mastering the top 20 interview questions outlined in this guide, you’ll be well-equipped to showcase your expertise and succeed in your ServiceNow developer interview. Remember to practice articulating your responses confidently and succinctly, and don’t hesitate to seek further clarification on any concepts or questions you encounter. Good luck!