Is neglecting prayer for an entire day due to extreme fatigue and exhaustion from a four-day continuous exam, and the inability to perform each prayer at its designated time, considered a sin?

Prayer holds a great status in Islam; it is the first thing a servant will be judged upon. Severe warnings have been established regarding those who abandon it, and delaying prayer beyond its prescribed time without a legitimate excuse is a grave sin and a clear transgression. The Muslim woman must repent to Allah and make up the missed prayers.