Although she studied hard, she did not succeed in the examination.
She breezed through the exam.
She kept studying untiringly and finally passed the difficult exam.
She succeeded in the entrance examination through her untiring [assiduous] effort.
That exam was tremendously difficult.
She failed the examination and I was greatly disappointed.
Regrettably, he failed the examination.
She passed the examination by working hard.
The examination he took last week was very hard.