Hello Khushboo

You will have to appear for Engineering entrance exams for admission to B.E/B.Tech Civil Engineering. Various entrance exams are conducted such as
JEE Main- For admission to NITs, IIITs, CFTIs.
JEE Advanced- For admission to IITs.
Birla Institute of Technology Science Admission Test (BITSAT)- For admission to Engineering courses offered by BITS campuses.
VIT Engineering Entrance Exam (VITEEE)- For admission to engineering courses offered by VIT University.
SRM Joint Engineering Entrance Exam (SRMJEEE)- For admission to SRM University.

Other Engineering exams are also conducted. The exams are conducted once a year. However, JEE Main 2019 exam is conducted by National Testing Agency (NTA) and the exam is to be conducted twice a year in January and April. JEE Main January exam has been conducted.

Kindly mention that you are seeking admission in which college/Institute or you want to appear for which entrance exam so I can provide you the details accordingly.

Good Luck!