There is no specific interview preparation course or guidance provided by DSSSB (Delhi Subordinate Services Selection Board). However, candidates can take various steps to prepare for the interview process.

Self-Study and Research:
- Candidates should thoroughly research about the DSSSB organization, its functions, and the role they have applied for.
- They should gather information about the job responsibilities, requirements, and the specific skills and knowledge required for the position.
- Candidates should also familiarize themselves with the current affairs, general knowledge, and any recent developments related to the field.

Mock Interviews:
- Candidates can practice mock interviews to gain confidence and improve their interview skills.
- They can simulate interview scenarios by asking a friend or family member to conduct a mock interview and provide constructive feedback.
- Mock interviews help candidates identify their strengths and weaknesses and work on improving them.

Reviewing Previous Years' Question Papers:
- Candidates should review and analyze previous years' interview question papers to understand the type of questions asked and the areas from which questions are generally framed.
- This will help them prepare for potential questions and formulate well-structured and thoughtful answers.

Effective Communication Skills:
- Candidates should focus on improving their communication skills, both verbal and non-verbal.
- They should practice speaking clearly, confidently, and effectively, maintaining proper body language and eye contact.

Preparing Responses to Common Questions:
- Candidates should prepare responses to common interview questions such as strengths and weaknesses, career goals, and why they are interested in the position.
- They should tailor their responses to highlight their relevant skills, experiences, and achievements.

Professional Appearance:
- Candidates should dress professionally and present themselves in a neat and tidy manner.
- They should ensure their attire is appropriate for the job role and the organization's culture.

Confidence and Positive Attitude:
- Candidates should approach the interview with confidence and a positive attitude.
- They should showcase their enthusiasm for the position and the opportunity to work with DSSSB.

Although DSSSB does not provide a specific interview preparation course or guidance, candidates can follow these steps to effectively prepare for their interviews and increase their chances of success.