Respondents could tick Yes, Unsure, or No.
all 21 respondents ticked No for a and Yes for E. They disagreed about whether B, C, and D could be considered to know Java; 3 ticked Yes for B, 5 ticked Yes for C, and 13 ticked Yes for D. even among this relatively homogeneous group, there was considerable disagreement over what the phrase knows Java meant in terms of actual knowledge of the Java programming language.