Candidates with a degree in Mechanical Engineering can apply for the GATE CSE (Computer Science Engineering) exam. However, there are certain requirements and considerations that they should be aware of before applying.

Eligibility Criteria:
To apply for the GATE CSE exam, candidates need to meet the eligibility criteria set by the conducting authority. These criteria include:

1. Educational Qualification: Candidates must have a bachelor's degree in Engineering/Technology or a master's degree in any relevant science subject. Since candidates with a degree in Mechanical Engineering already have an engineering degree, they fulfill this requirement.

2. Validity of Degree: The degree obtained by the candidate should be from a recognized university or institution. Mechanical Engineering degrees from reputable institutions are typically accepted.

3. Minimum Percentage: Candidates must have secured a minimum percentage in their qualifying degree. The minimum percentage varies for different categories (General/OBC/SC/ST/PwD), and candidates should check the official GATE website for the specific requirements.

Subject Knowledge:
While candidates with a Mechanical Engineering background can apply for the GATE CSE exam, it is important to note that the syllabus for the CSE exam is primarily focused on computer science and related topics. Therefore, candidates should have a strong foundation in computer science subjects to perform well in the exam.

Preparation Strategy:
To prepare for the GATE CSE exam, candidates with a Mechanical Engineering background should follow a structured study plan. Here are some tips:

1. Familiarize with the Syllabus: Candidates should carefully go through the GATE CSE syllabus and identify the topics that are new to them or require additional focus.

2. Study Material: There are several books, online resources, and study materials available that specifically cater to the GATE CSE syllabus. Candidates should choose reliable sources and study materials to enhance their knowledge.

3. Practice Previous Year Papers: Solving previous years' question papers and sample papers can help candidates understand the exam pattern, identify important topics, and improve time management skills.

4. Join Coaching Classes: If candidates feel the need for additional guidance and support, they can consider joining coaching classes that offer specialized GATE CSE preparation.

Conclusion:
Candidates with a degree in Mechanical Engineering can apply for the GATE CSE exam, provided they meet the eligibility criteria. While they may have to put in extra effort to cover the computer science topics, with proper preparation and dedication, they can excel in the exam.