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Questions and Answers
What does the CMP instruction do in assembly language?
What does the CMP instruction do in assembly language?
- It divides the source operand by the destination operand, updating the flags.
- It compares the source operand with the destination operand, updating the flags without changing either operand. (correct)
- It multiplies the source operand with the destination operand, updating the flags.
- It adds the source operand to the destination operand, updating the flags.
What is the purpose of the conditional jump instruction that follows the CMP instruction?
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 value of both the source and destination operands.
- To execute a jump to a different part of the program based on the result of the comparison. (correct)
- To execute a jump to a different part of the program based on the value of the destination operand.
- To execute a jump to a different part of the program based on the value of the source operand.
How can the carry flag be used to check the result of a subtraction operation?
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 destination operand is larger than the source operand.
- The carry flag is set if a borrow is needed during the subtraction, indicating that the source operand is larger than the destination operand. (correct)
- The carry flag is set if the result of the subtraction is negative, indicating that the destination operand is larger than the source operand.
- The carry flag is set if the result of the subtraction is positive, indicating that the source operand is larger than the destination operand.
What does the zero flag indicate after a subtraction operation?
What does the zero flag indicate after a subtraction operation?
What is the purpose of using comparisons and boolean expressions in higher-level programming languages?
What is the purpose of using comparisons and boolean expressions in higher-level programming languages?
What is the role of the overflow flag in the result of a subtraction operation?
What is the role of the overflow flag in the result of a subtraction operation?
What is the key difference between signed and unsigned numbers?
What is the key difference between signed and unsigned numbers?
How are the numbers $-2$ and $2$ compared differently for signed and unsigned numbers?
How are the numbers $-2$ and $2$ compared differently for signed and unsigned numbers?
How are signed and unsigned numbers represented in two's complement notation?
How are signed and unsigned numbers represented in two's complement notation?
What is the key idea regarding the representation of $-2$ and $65534$ in two's complement notation?
What is the key idea regarding the representation of $-2$ and $65534$ in two's complement notation?
How do the conditional jump operations JG and JL work differently for signed and unsigned numbers?
How do the conditional jump operations JG and JL work differently for signed and unsigned numbers?
What is the key idea regarding the comparison of $-2$ and $2$ using the CMP instruction?
What is the key idea regarding the comparison of $-2$ and $2$ using the CMP instruction?
