Hey, there are no sample paper available for m.phil psychology, but there are psychology papers for GRE, UPSE, NET. so the only way is to try these papers.

you also need to study course books in Psychology which were there in BA and MA such as:

• General Psychology
• Social Psychology(attitude, social influence, social relations)
• Statistics and Research Methods(complete)
• Physiological Psychology(Intro, Neurons, Nervous System, Sleep)
• Developmental Psychology(Attachment, Developmental stages, language development, moral development)
• Abnormal Psychology(complete)
• ICD and DSM
• Psychological Assessments
• Psychotherapies

Get through with the basics in the syllabus dear
ALL THE BEST