PAI UNIT 3 MCQS A.Y. 2024-25 SEM I

1. You are running a modern operating system that requires multitasking. Which feature of the 80386 processor enables this?

• A) Real mode
• B) Protected mode
• C) Virtual 8086 mode
• D) Multitasking is not supported

2. A system requires support for virtual memory management. Which feature of the 80386 provides this functionality?

• A) Segmentation
• B) Paging
• C) Real mode
• D) Bus control

3. Your program needs to handle large amounts of memory. What is the maximum amount of memory the 80386 can address?

• A) 1MB
• B) 4GB
• C) 16MB
• D) 64GB

4. Which mode of the 80386 processor allows running old 8086 software while using modern system capabilities?

• A) Protected mode
• B) Real mode
• C) Virtual 8086 mode
• D) Multitasking mode

5. A program needs memory protection in a multitasking environment. Which mode of 80386 provides this feature?

• A) Real mode
• B) Protected mode
• C) Virtual 8086 mode
• D) Flat mode

6. In the 80386 architecture, how are logical addresses translated to physical addresses?

• A) Paging and Segmentation
• B) Direct mapping
• C) Cache memory
• D) Interrupt vector tables

7. Which 80386 register controls the enabling and disabling of paging?

• A) CR0
• B) GDTR
• C) EFLAGS
• D) IDTR

8. A developer wants to access the base address of the Global Descriptor Table (GDT). Which register should be used?

• A) CR3
• B) GDTR
• C) IDTR
• D) SS

9. You are debugging a program and need to examine the flags related to the processor's status. Which register holds this information?

• A) CR0
• B) EIP
• C) EFLAGS
• D) EAX

10. Which of the following registers in 80386 is used for holding the base address of the page directory?

• A) CR0
• B) CR2
• C) CR3
• D) EAX