Apex domains cannot have CNAME records.
Question and response
Question
dig semiconductor101.com. NS
Answer
semiconductor101.com. 1 NS ns-95.awsdns-11.com.
semiconductor101.com. 1 NS ns-599.awsdns-10.net.
semiconductor101.com. 1 NS ns-498.awsdns-62.com.
semiconductor101.com. 1 NS ns-1124.awsdns-12.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0