In the RRB JE Exam, the minimum qualifying marks for CBT 1 are:

General Category: 40%

OBC & SC Categories: 30%

ST Category: 25%

Therefore, as an OBC candidate, you need to score at least 30% in CBT 1 to qualify for CBT 2.

If you score 42 marks in CBT 1, you will have:

General Category: 42/100 = 42% (above the 40% qualifying mark)

OBC Category: 42/100 = 42% (above the 30% qualifying mark)

Since 42% exceeds the minimum qualifying marks for both categories, you will qualify for CBT 2.

Please note that these percentages are based on the total marks of 100 for CBT 1.

The actual cut-off marks may vary depending on the specific exam and the number of candidates.

For example, in the RRB ALP Exam, the qualifying cut-off for OBC candidates in CBT 1 was 30% (22.5 out of 75 marks).

Therefore, scoring 42 marks in CBT 1 should be sufficient to qualify for CBT 2.

However, it's advisable to check the official notification for the specific exam you are appearing for, as cut-off marks and qu

alifying criteria can vary.