12 Questions
What does the CMP instruction do in assembly language?
It compares the source operand with the destination operand, updating the flags without changing either operand.
What is the purpose of the conditional jump instruction that follows the CMP instruction?
To execute a jump to a different part of the program based on the result of the comparison.
How can the carry flag be used to check the result of a subtraction operation?
The carry flag is set if a borrow is needed during the subtraction, indicating that the source operand is larger than the destination operand.
What does the zero flag indicate after a subtraction operation?
The zero flag is set if the result of the subtraction is zero, indicating that the source and destination operands are equal.
What is the purpose of using comparisons and boolean expressions in higher-level programming languages?
To provide the ability to perform conditional jumps in the program.
What is the role of the overflow flag in the result of a subtraction operation?
The overflow flag is set if the result of the subtraction is too large to fit in the destination operand.
What is the key difference between signed and unsigned numbers?
Signed numbers consider both the magnitude and the sign, while unsigned numbers only consider the magnitude.
How are the numbers $-2$ and $2$ compared differently for signed and unsigned numbers?
For signed numbers, $-2$ is less than $2$, but for unsigned numbers, $2$ is greater than $-2$.
How are signed and unsigned numbers represented in two's complement notation?
Signed numbers are represented in two's complement notation, while unsigned numbers are not.
What is the key idea regarding the representation of $-2$ and $65534$ in two's complement notation?
The representation of $-2$ and $65534$ would be the same, but the processor would treat them differently based on whether they are interpreted as signed or unsigned.
How do the conditional jump operations JG and JL work differently for signed and unsigned numbers?
JG and JL work properly for signed numbers, but JA and JB work properly for unsigned numbers.
What is the key idea regarding the comparison of $-2$ and $2$ using the CMP instruction?
The CMP instruction performs a normal subtraction, and the intent to treat the numbers as signed or unsigned is conveyed during the conditional jump operation.
Test your knowledge on conditional jumps in assembly language and comparisons using boolean expressions. Explore the different types of conditions and operands used in programming.
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