Ch 13: Multitasking & Cooperative Kernels

Covers thread and process abstractions at the assembly level, initializing independent task stacks, switching execution contexts via register swapping, and cooperative scheduling algorithms.

141 Questions141 MCQs0 Short Questions0 Long Questions

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CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Timed practice exam simulation for CS401 - Computer Architecture and Assembly Language Programming.

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Q41

🧠 Long Problem📘 CS401📑 Lec 13🏷️ BIOS INT 13h Disk Read Sector ServiceHard🔁⭐💡🌟📄🎓VU🏛️VU

Detail the register parameters, buffer pointers, and return values required to read disk sectors into memory using BIOS INT 13h Service 02h.

💻 assembly Snippet

mov ah, 0x02
mov al, 1
mov ch, 0
mov cl, 1
mov dh, 0
mov dl, 0x80
mov bx, buffer
int 0x13

Q42

❓ MCQ📘 CS401📑 Lec 13🏷️ DOS Device Drivers and Attribute Word EncodingHard🔁⭐💡📄🎓VU🏛️VU

In a DOS Device Driver Attribute Word, which bit determines whether the driver represents a character device or a block device?

💻 assembly Snippet

dw 0x8000 ; Bit 15 set = Character Device

A.Bit 12
B.Bit 13
C.Bit 14
D.Bit 15

Q43

❓ MCQ📘 CS401📑 Lec 13🏷️ Device Driver Architecture: Character vs Block DevicesMedium🔁⭐💡📄🎓VU🏛️VU

Operating system device drivers are fundamentally divided into how many major categories?

A.5 categories
B.4 categories
C.3 categories
D.2 categories

Q44

❓ MCQ📘 CS401📑 Lec 13🏷️ Hard Disk Master Boot Record (MBR) StructureEasy🔁⭐💡📄🎓VU🏛️VU

What is the total physical storage size of a hard disk Master Boot Record (MBR) sector?

A.446 bytes
B.350 bytes
C.512 bytes
D.256 bytes

Q45

❓ MCQ📘 CS401📑 Lec 13🏷️ Disk Partition Table and MBR OrganizationEasy🔁⭐💡📄🎓VU🏛️VU

What critical data structure is contained within the first sector (Master Boot Record) of a hard disk drive?

A.Hard disk size
B.Partition table
C.Data size
D.Sector size

Q46

❓ MCQ📘 CS401📑 Lec 13🏷️ BIOS Disk Services (INT 13h) and Error Status CodesEasy🔁⭐💡📄🎓VU🏛️VU

Which CPU register is generally used by BIOS INT 13h disk services to return the error status code if an operation fails?

💻 assembly Snippet

int 0x13

A.CF
B.DL
C.AH
D.AL

Q47

❓ MCQ📘 CS401📑 Lec 13🏷️ File System Concepts and File AbstractionEasy🔁⭐💡📄🎓VU🏛️VU

Operating systems organize logical data stored on secondary storage media primarily in the form of __________.

A.Folders
B.Batch files
C.Files
D.None of the above

Q48

❓ MCQ📘 CS401📑 Lec 13🏷️ DOS INT 21h File Services and Error HandlingMedium🔁⭐💡📄🎓VU🏛️VU

When invoking DOS INT 21h Service 3Dh (Open Existing File), how does the operating system indicate that the file could not be opened?

💻 assembly Snippet

mov ah, 0x3D
int 0x21
jc handle_error

A.Carry Flag is set (CF = 1)
B.Carry Flag is cleared (CF = 0)
C.Zero Flag is set (ZF = 1)
D.Zero Flag is cleared (ZF = 0)

Q49

❓ MCQ📘 CS401📑 Lec 13🏷️ FAT File System Directory Entry StructureMedium🔁⭐💡📄🎓VU🏛️VU

In the FAT32 file system under DOS, how many bytes are contained in a single directory entry structure?

A.16 bytes
B.24 bytes
C.32 bytes
D.64 bytes

Q50

❓ MCQ📘 CS401📑 Lec 13🏷️ BIOS Parameter Block (BPB) StructureMedium🔁⭐💡📄🎓VU🏛️VU

In disk file system architecture, what does the acronym BPB stand for?

A.Basic Parameter Block
B.BIOS Precise Block
C.Basic Precise Block
D.BIOS Parameter Block

Ch 13: Multitasking & Cooperative Kernels

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

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CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

Final Term Examination

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