If you are asking for one mark questions related to the topics covered in Class 7 CBSE Mathematics (which you previously requested), here are one mark questions from various chapters:
Integers
1. What is the additive identity of integers?
Answer: 0
Fractions and Decimals
2. What is the decimal form of 3/5?
Answer: 0.6
Data Handling
3. What is the mode in the following data set: 3, 7, 3, 8, 3, 2?
Answer: 3