ICT170 - Q5

Which is easier to program in, C or Assembly language?

• C

• Assembly language

What is the purpose of the x86 Assembly language JMP instruction?

• The JMP instruction directs program flow if ZF is set.

• The JMP instruction directs program flow to the label if ZF is set

• The JMP instruction directs program flow to the label.

• The JMP instruction directs program flow if CF is set.

What is the purpose of the x86 Assembly language LOOP instruction?

• LOOP Decrements ECX, if ECX doesn't equal 0 it branches to a label

• LOOP Increments ECX, if ECX doesn't equal 1 it branches to a label

• LOOP Decrements ECX, if ECX doesn't equal 2 it branches to a label

• LOOP Increments ECX, if ECX doesn't equal 10 it branches to a label

What is the purpose of the x86 Assembly language CMP instruction?

• The CMP instruction subtracts one operand from the other. The results are stored in the FLAGS register.

• The CMP instruction adds two operands. The results are stored in the FLAGS register.

• The CMP instruction Increments an operand.

• The CMP instruction subtracts one operand from the other and jumps to a label.

What does the x86 Assembly language FLAG ZF represent?

• The ZF flag is set to 1 if the difference between the two CMP operands is 0.

• The ZF flag is set to 1 if the difference between the two CMP operands is 100.

• The ZF flag is set to 1 if the difference between the two CMP operands is 1.

• The ZF flag is set to 0 if the difference between the two CMP operands is 0.

What does the x86 Assembly language JZ do?

• branches only if ZF is set

• branches only if ZF is unset

• branches only is JO is set

• branches only is JO is unset

What is the value of the ZF and CF FLAGS after “CMP 0 0”?

• ZF is 2 and CF is 2.

• ZF is 1 and CF is 1.

• ZF is 0 and CF is 0.

• ZF is 1 and CF is 0.

What is the value of the ZF and CF FLAGS after “CMP 1 2”?

• ZF is 1 and CF is 1.

• ZF is 10 and CF is 1.

• ZF is 0 and CF is 0.

• ZF is 0 and CF is 1.

What is the value of the ZF and CF FLAGS after “CMP 4 1”?

• ZF is 0 and CF is 0.

• ZF is 1 and CF is 0.

• ZF is 2 and CF is 0.

• ZF is 3 and CF is 1.

What will be the value of ECX after the following code?

mov ECX, 3

label L1:

loop L1

• 0

• 3

• 6

• 10