CS401 final paper 2012

An 8 x 16 font is stored in ______________ bytes.
► 2
► 4
► 8
► 16
In DOS input buffer, the number of characters actually read on return is stored in ___________ byte.
► third
► fourth
► first
► second
The time interval between two timer ticks is ?
► 40ms
► 45ms
► 50ms
► 55ms
In NASM an imported symbol is declared with the ………………………. while
and exported symbol is declared with the ……………………….
► Global directive, External directive
► External directive, Global directive PAGE 181
► Home Directive, Foreign Directive
► Foreign Directive, Home Directive
In 68K processors there is a 32bit …………………. that holds the address of
currently executing instruction
► Program counter PAGE 184
► Stack pointer
► Register
► Stack
INT 21 service 01H is used to read character from standard input with echo. It returns the result in ______ register.
► AL page 144
► BL
► CL
► BH
In 9pin DB 9, which pin number is assigned to DSR (Dataset Ready) ?
► 4
► 5
► 6 page 146
► 7
8088 is a………………………
► 16 bit processor page 6
► 32 bit processor
► 64 bit processor
► 128 bit processor
24The table index (TI) is set to _____ to access the GDT (Global Descriptor
Table).
► 1
► 0 page 168
► -1
► -2
VESA (Video Electronics Standards Association) organizes 16 color bits for every pixel in
► 5:5:5 formats
► 5:6:5 format page 172
► 6:5:6 formats
► 5:6:7 formats

Question No: 28 In graphics mode a location in video memory corresponds to a _____________ on the screen.
► Line
► Dot page 142
► Circle
► Rectangle
The thread registration code initializes the PCB and adds it to the linked list so that they __________ will give it a turn.
► Assembler
► Scheduler page 133
► Linker
► Debugger
38 To reserve 8-bits in memory ___ directive is used.
► db 17page
► dw
► dn
► dd
one quisten iz motorola
push 2 numbe find physical adresses 5 marks
difference segment desription and segmen contratin 3 marks
in10 visa and parlar port pr tha total 12 quisten thy baki yd nai a rhy

1. Difference between serial and parallel communication.
2. What is Telnet error
3. What is double fault
4. Write brief about INT 13 – Extended READ SERVICES
5. Describe briefly INT 3 functionality.

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