Introduction:
In the Graduate Aptitude Test in Engineering (GATE) for Computer Science Engineering (CSE), questions with multiple correct answers are known as Multiple Select Questions (MSQs). These questions are designed to test the depth of knowledge and analytical skills of the candidates. Unlike other types of questions in GATE, MSQs offer partial marking, meaning that candidates can receive partial credit for selecting some, but not all, of the correct options.

Marking Scheme:
The marking scheme for MSQs in GATE CSE is as follows:

1. Correct Selection: For each correct option selected, a candidate is awarded +2 marks.
2. Incorrect Selection: For each incorrect option selected, a candidate is penalized with a negative marking of -0.66 marks.
3. Unattempted: For questions left unattempted, no marks will be awarded or deducted.

Example:
Let's consider an example to understand the marking scheme better.

Question: Select all the programming languages that support object-oriented programming.

Options:
- C
- Java
- Python
- HTML

Correct Options: Java, Python

Scenarios:
1. If a candidate selects only the correct options (Java and Python) and leaves the incorrect options (C and HTML) unselected, they will receive +4 marks (2 marks for each correct option).
2. If a candidate selects only the incorrect options (C and HTML) and leaves the correct options (Java and Python) unselected, they will receive -1.32 marks (0 marks for correct options and -0.66 marks for each incorrect option).
3. If a candidate selects some correct options (Java or Python) and some incorrect options (C or HTML), they will receive marks based on the number of correct options selected and the penalty for incorrect options.
4. If a candidate leaves the question unattempted, they will neither gain nor lose any marks.

Conclusion:
In summary, marks for questions with multiple correct answers in GATE CSE are awarded based on the number of correct options selected and the penalty for incorrect options. It is important for candidates to carefully read the question and evaluate each option before making their selection to maximize their score.