You can run the test several times and the app will present a different set of ABAP questions every time, but respecting the same percentage for each area as shown below. At the end, it will show you your score for each area, so you will see in which areas you perform well and in which you need to learn more. This way, you can run the test several times and present yourself to the exam only when you can answer a high percentage of questions correctly. Have fun and good luck for the exam!

Areas and percentages:
ABAP Programming 13%
ABAP Dictionary 12%
Data Types and Data Objects 8%
Classical User Interfaces 8%
SQL Statements 9%
Enhancements and Modifications 9%
ABAP Objects 10%
Web Dynpro for ABAP 8%
SAP NetWeaver Overview 7%
Internal Tables 8%
ABAP Tools 8%

To learn for the certification, the following courses, e-learnings and videos are also recommended:
SAP Classroom Trainings: SAPTEC (NETW), BC400 (DATA), BC410 (DYNP) BC401 (OO), BC430 (DICT), BC425 (MOD), BC470 (WDYNP)
E-Leaning: BC410E (CUI), TAW1E (ABAP Basics)
Books: ABAP 7.4 Certification Guide (SAP Press), ABAP Objects (SAP Press),
YouTube: WebDynpro ABAP by Sankara Rao Bhatta (incl SAP System Demos)

SAP ABAP® is a registered trademark of SAP SE in Germany and in several other countries. The app was not made, reviewed or corrected by SAP AG. These questions were freely formulated and any similarity to certification questions is a coincidence.