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.

Showing 131 – 140 of 141 Questions

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Q131

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.3. Storage Access using DOSEasy🔁⭐💡📄🎓VU🏛️VU

In a DOS.COM program, what is the maximum length of parameter bytes that can be passed through the command line (command tail)?

💻 assembly Snippet

mov cl, [0x80]  ; Command tail length byte (max 127)

A.63 bytes
B.127 bytes
C.255 bytes
D.511 bytes

Q132

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.1. Physical StructureEasy🔁⭐💡📄🎓VU🏛️VU

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

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

Q133

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.2. BIOS Disk ServicesEasy🔁⭐💡📄🎓VU🏛️VU

In BIOS INT 13h disk services, which status flag is used to signal whether an operation succeeded or failed?

💻 assembly Snippet

mov ah, 0x02
int 0x13
jc disk_error  ; Branch if CF = 1

A.Carry Flag (CF)
B.Zero Flag (ZF)
C.Sign Flag (SF)
D.Overflow Flag (OF)

Q134

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.2. BIOS Disk ServicesMedium🔁⭐💡📄🎓VU🏛️VU

In BIOS INT 13h disk services, which register is used to return the error status code when an operation fails?

💻 assembly Snippet

mov ah, 0x02
int 0x13
jc error_handler  ; AH contains error code if CF = 1

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

Q135

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.1. Physical StructureEasy🔁⭐💡📄🎓VU🏛️VU

The first physical sector on a partitioned hard disk contains the Master Boot Record (MBR), which includes the boot code and the:

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

Q136

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.3. Storage Access using DOSEasy🔁⭐💡📄🎓VU🏛️VU

In secondary storage media management, the operating system organizes logical data in the form of:

A.Folder
B.Batch file
C.File
D.None of the above

Q137

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.3. Storage Access using DOSEasy🔁⭐💡📄🎓VU🏛️VU

In the DOS buffered keyboard input service (INT 21h, Service 0Ah), which byte offset of the input buffer structure stores the actual number of characters read upon return?

💻 assembly Snippet

buffer db 80    ; max bytes (offset 0)
       db ?     ; actual count read (offset 1)
       db 80 dup(?) ; string buffer (offset 2+)

A.First byte (offset 0)
B.Second byte (offset 1)
C.Third byte (offset 2)
D.Fourth byte (offset 3)

Q138

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.3. Storage Access using DOSEasy🔁⭐💡📄🎓VU🏛️VU

The first executable instruction of a DOS.COM executable file must be located at which segment offset?

💻 assembly Snippet

org 0x0100  ; .COM file entry point offset

A.0x0010
B.0x0100
C.0x1000
D.0x0000

Q139

❓ MCQ📘 CS401📑 Lec 13🏷️ 13.4. Device DriversMedium🔁⭐💡📄🎓VU🏛️VU

In the Device Attribute Word of a DOS device driver header, which bit determines whether it is a character device or a block device?

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

Q140

📝 Short Q📘 CS401📑 Lec 13🏷️ 13.1. Physical StructureMedium🔁⭐💡📄🎓VU🏛️VU

Fill in the missing blanks in the following passage describing BIOS disk storage structure: 'BIOS sees the disks as a combination of sectors, tracks, and (1)________, as a raw storage device without concern to whether it is reading a file or directory. (2)________ provides the simplest and most powerful interface to the storage medium. However this raw storage is meaningless to the user who needs to store his files and organize them into (3)________.'

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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