As per your concern I will get details of C-DAC Common Admission Test (C-CAT), so that you can get idea easily.

Syllabus
Test Paper Topics Duration
Section A English, Quantitative Aptitude, Reasoning 1 hour

Section B Computer Fundamentals, C Programming, Data Structures, Data Communication & Networking, Object Oriented Programming Concepts, Operating Systems 1 hour

Section C Computer Architecture, Digital Electronics, Microprocessors 1 hour

Courses offered
PG Diploma in Geoinformatics (PG-DGi)
PG Diploma in Advanced Computing (PG-DAC)
PG Diploma in Wireless & Mobile Computing (PG-DwiMC)
PG Diploma in System Software Development (PG-DSSD)
PG Diploma in IT Infrastructure, Systems & Security (PG-DITISS)
PG Diploma in Embedded Systems Design (PG-DESD)
PG Diploma in VLSI Design (PG-DVLSI)
PG Diploma in Automation & SCADA Systems (PG-DASS)
PG Diploma in Integrated VLSI & Embedded Systems Design (PG-DIVESD)

Exam pattern
C-CAT has three sections (Section A, Section B, Section C) of one hour duration each.

As shown in Table 6, depending on the category of courses selected by the candidate, he/she will have to either appear for just one test paper (Section A) or two test papers (Section A and Section B) or all the three test papers (Section A, Section B and Section C)

The medium of C-CAT is English

Application fee
For candidates who opt (in the online application) to use their own laptops for C-CAT, the exam fee for Category I (Section A) is Rs.1000/-, for Category II (Sections A & B) is Rs.1200/-, and for Category III (Sections A, B & C) is Rs.1400/-

A computer usage charge of Rs.200/- will be added to the fee if the candidate opts in the online application to use the computer of the C-CAT centre

After filling the online C-CAT application form, the exam fee may be paid online OR in cash through the 'Make Payment' step on the main menu of the online application. No cheque or demand draft (DD) will be accepted towards payment of C-CAT exam fee