Question 11 mark
Which register holds the memory address of the next instruction to be fetched?
HL, Paper 1 Section A · Theme A: concepts of computer science
A1 Computer fundamentals
Questions for HL. · The lesson
1 of 6
Question 21 mark
What is the binary value 1011 0110 in hexadecimal?
Question 31 mark
A program reads the same 20 values from memory thousands of times inside a loop. Why are the reads after the first pass faster than the first pass?
Question 41 mark
A circuit gives Q = (A XOR B) AND (NOT C). For which inputs is Q equal to 1?
Question 51 mark
A two-input gate's truth table gives output 1 for inputs 00 and output 0 for inputs 01, 10 and 11. Which gate is it?
Question 61 mark
Which expression is equivalent to (A AND B) OR (A AND NOT B) OR (NOT A AND B)?