Tag: assembly

To solve this question, the user needs to have basic knowledge about operating systems and their functions.

Now, let's go through each option and explain why it is right or wrong:

A. System boot: This option is correct. One of the main functions of an operating system is to manage the boot process of a computer. When a computer is turned on, the operating system is responsible for loading and initializing the necessary components to start the system.

B. Running applications: This option is also correct. Another important function of an operating system is to manage and run applications on a computer. The operating system provides resources and services to enable applications to execute and interact with the hardware and other software components.

C. Both wrong: This option is incorrect. Both option A and option B are correct, as explained above.

D. Both correct: This option is correct. Both option A (System boot) and option B (Running applications) accurately describe functions performed by an operating system.

C. Both wrong: This option is incorrect. Both option A and option B are correct, so this option is not the correct answer.

D. Both correct: This option is incorrect. While both option A and option B are correct, this option does not accurately describe the functions of an operating system. It is more accurate to say that an operating system performs a wide range of functions, including system boot and running applications.

The Answer is: D

To solve this question, the user needs to understand the MOV and CMP assembly instructions.

MOV is a transfer instruction that moves data from a source operand to a destination operand. In this case, the source operand is the immediate value 456h, and the destination operand is the AX register. This instruction copies the value 456h into the AX register.

CMP is a comparison instruction that compares two operands and sets the appropriate flags in the flags register based on the result of the comparison. In this case, the operands are the AX register and the immediate value 456h. This instruction subtracts the value of the immediate operand from the value of the AX register and sets the appropriate flags based on the result.

Now, let's go through each option and explain why it is right or wrong:

A. 456h: This option is correct. The MOV instruction moves the value 456h into the AX register, so the AX register contains the value 456h. The CMP instruction does not modify the value of the AX register.

B. Zero: This option is incorrect. The MOV instruction moves the value 456h into the AX register, so the AX register contains the value 456h. The CMP instruction does not modify the value of the AX register.

C. 1: This option is incorrect. The CMP instruction does not affect the value of the AX register, so the value of the AX register remains 456h.

D. Unknown: This option is incorrect. The MOV instruction moves the value 456h into the AX register, so the value of the AX register is known to be 456h. The CMP instruction does not modify the value of the AX register.

Therefore, the answer is: A. 456h