This is the 5784th most frequent Arabic word.
محدد
Defined, specific, or determined.
Here, 'محدد' means 'allocated' or 'specified', referring to the fixed duration of time for the exam.
الوقت المحدد للامتحان هو ساعتان.
The time allocated for the exam is two hours.
In this context, 'محددة' means 'specific' or 'detailed', describing the nature of the details provided in the book.
هذا الكتاب يحتوي على تفاصيل محددة للموضوع.
This book contains specific details about the subject.
In this usage, 'تحديد' derived from the same root as 'محدد', means 'highlight' or 'marking', often used in educational or reading contexts.