Hello @MaidhiliL ,

Refer to this questions, this will help a lot :

1. Explain record matching and data lookup features in ServiceNow.

2. What is the meaning of impersonating a user and how is it useful?

3. Detail about client script.

4. Define record producer.

5. Name the searching technique used to search a record or text in ServiceNow.

6. What do you understand by HTML Sanitizer?

7. Explain BSM Map.

8.Define performance analytics.

9. What is the use of a reference qualifier?

10. Differentiate between _next() and next() method.

11) How to create an Inbound Email Action?

12) How does ServiceNow recognize Inbound Emails?

13) How to hide watermark globally?

14) What is a BSM Map?

15) How to create a new role?

16) What happens if a Default update set is marked as complete?

17) Do Homepages and Content pages are added to the update sets?

18) What is the difference between ${URI} and ${URI_REF}?

19) How will you hide/show a field using client script?

20) What is the processing order for Record ACL rules?

21) How do you get the records of a specified field which are not null?

22) How to change the Homepage layout?

23) How to change the banner and list caption background color?

24) What does the Client Transaction Timings plugin do?

25) What happens when a user changes the homepage?

26) What role are you required to create/update ACL 

27) Which object is used to refer to the current logged in user in the client script?

28) State the best practices of client scripts?

Also refer this :

ITSM interview Questions 

If my response helped mark as helpful and accept the solution.