Assembly Programming Quiz Questions

Cover Page
Assembly
Programming
Language
Author: JavaChamp Team
Copyright (c) 2010-2014

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Table of Contents
Quiz Permalink: http://www.quizover.com/pdf/assembly-programming-questions
Author Profile: http://www.quizover.com/user/profile/Java.Champ
1. Assembly Programming Language
Basics

4. Chapter: Basics
1. Basics Questions

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4.1.1. Question: Consider the program segment:
AgeDB 100
MOVAge,123
What is t...
Consider the program segment:
AgeDB 100
MOVAge,123
What is the memory-addressing mode of the first operand in the MOV instruction?
Please choose only one answer:
Immediate addressing mode
direct addressing mode
Indirect addressing mode
Check the answer of this question online on QuizOver.com:
Question: What is the memory addressing mode?
Permalink: http://www.quizover.com/pdf/what-is-the-memory-addressing-mode

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4.1.2. Question: The operating system (DOS / Windows) generally loaded (system boot)...
The operating system (DOS / Windows) generally loaded (system boot) from:
ROM
RAM
Hard/ Floppy Disk
Question: From where operating system is loaded?
Permalink: http://www.quizover.com/pdf/from-where-operating-system-is-loaded

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4.1.3. Question: The CX register full name is:
The CX register full name is:
Accumulator register
Base register
Counter register
Question: Counter register
Permalink: http://www.quizover.com/pdf/counter-register

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4.1.4. Question: The result of logical operation: 1 XOR 0
The result of logical operation: 1 XOR 0
logic 0
logic 1
Author: Yasser Ibrahim
Question: logical operator XOR in assembly
Permalink: http://www.quizover.com/pdf/logical-operator-xor-in-assembly

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4.1.5. Question: How many bytes in a double word
How many bytes in a double word
1 byte
2 byte
4 byte
Question: double word
Permalink: http://www.quizover.com/pdf/double-word

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4.1.6. Question: When you power on the computer it starts executing instructions in:
When you power on the computer it starts executing instructions in:
ROM
RAM
Hard Disk
Question: What is first executed when starting the computer?
Permalink: http://www.quizover.com/pdf/what-is-first-executed-when-starting-the-computer

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4.1.7. Question: power on the computer is called:
power on the computer is called:
Warm boot
Cold boot
both (a) and (b) are false
Question: What is cold boot?
Permalink: http://www.quizover.com/pdf/what-is-cold-boot

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4.1.8. Question: The auxiliary flag will be set if:
The auxiliary flag will be set if:
Both bits number 4,5 are set to 1
There is a carry / borrow between bits number 4,5
Both correct
Question: When will auxiliary flag be set?
Permalink: http://www.quizover.com/pdf/when-will-auxiliary-flag-be-set

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4.1.9. Question: To display the contents of 100 bytes starting at physical address 0...
To display the contents of 100 bytes starting at physical address 00000 using the debug:
–d 0 FF
–d 0:0 FF
–d 0:0 0:FF
Question: How to display the contents of 100 bytes?
Permalink: http://www.quizover.com/pdf/how-to-display-the-contents-of-100-bytes

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4.1.10. Question: The multiple Segment:Offset representations for a unique physical a...
The multiple Segment:Offset representations for a unique physical address is:
Advantage for 8086 processor to provide flexibility
disadvantage for 8086 processor, it make it harder to program
Has no effect
Question: What is the multiple Segment Offset representations for a unique physical address?
Permalink: http://www.quizover.com/pdf/what-is-the-multiple-segment-offset-representations-for-a-unique-
physical-address

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4.1.11. Question: The physical address 12345 can be represented by the logical address:
The physical address 12345 can be represented by the logical address:
1234:5
1230:45
Both (a) and (b) are correct
Question: How can a physical address be represented?
Permalink: http://www.quizover.com/pdf/how-can-a-physical-address-be-represented

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4.1.12. Question: The result of logical operation: 1 AND 1
The result of logical operation: 1 AND 1
logic 1
logic 0
Question: logical operator AND
Permalink: http://www.quizover.com/pdf/logical-operator-and

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4.1.13. Question: What is the memory addressing mode of the first operand in the inst...
What is the memory addressing mode of the first operand in the instruction MOV [BX],1234:
Register addressing mode
Question: what is Indirect addressing mode?
Permalink: http://www.quizover.com/pdf/what-is-indirect-addressing-mode

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4.1.14. Question: What is the memory addressing mode of the first operand in the inst...
What is the memory addressing mode of the first operand in the instruction MOV BX,1234:
Register addressing mode
Question: What is Register addressing mode?
Permalink: http://www.quizover.com/pdf/what-is-register-addressing-mode

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4.1.15. Question: What is the value of AX register after the following instructions, ...
What is the value of AX register after the following instructions, assume Mark at offset 1000
Mark DW 123
LEA AX,Mark
1000
123
Unknown
Question: AX register assembly
Permalink: http://www.quizover.com/pdf/ax-register-assembly

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4.1.16. Question: Memory segments can start every:
Memory segments can start every:
1 paragraph (16 bytes)
1 word (2 bytes)
1 byte
Question: Memory segments can start every?
Permalink: http://www.quizover.com/pdf/memory-segments-can-start-every

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4.1.17. Question: The ROM BIOS contents:
The ROM BIOS contents:
Can be written by the DEBUG program
Written by the ROM manufacturer and can not be changed
Volatile and must be refreshed on computer power on
Question: Who writes ROM BIOS contents ?
Permalink: http://www.quizover.com/pdf/who-writes-rom-bios-contents

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4.1.18. Question: To write assembly program that generates .COM program, how many seg...
To write assembly program that generates .COM program, how many segment you can use:
Only Code
Code ; Data
Code ; Data ; Stack
Question: how many segment you can use for .com program?
Permalink: http://www.quizover.com/pdf/how-many-segment-you-can-use-for-com-program

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4.1.19. Question: The limitation on The maximum memory space addressable by 8086 proc...
The limitation on The maximum memory space addressable by 8086 processor because:
The address bus width was 20 bits
The register size was 16 bits
It has only 14 registers
Question: what was max memory space in 8086 processor?
Permalink: http://www.quizover.com/pdf/what-was-max-memory-space-in-8086-processor

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4.1.20. Question: What is the value of AX register after executing, MOV AX,456h,CMP...
What is the value of AX register after executing, MOV AX,456h,CMP AX,456h
456h
Zero
Unknown
Question: MOV and CMP AX register
Permalink: http://www.quizover.com/pdf/mov-and-cmp-ax-register

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4.1.21. Question: The value in AL register when using interrupt (INT 21h), service nu...
The value in AL register when using interrupt (INT 21h), service number (4Ch) is:
Completely ignored
Depend on the value of AH register
Return value to the calling program (usually DOS operating system)
Question: What is the value of AL register when using interrupt (INT 21h), service number (4Ch)?
Permalink: http://www.quizover.com/pdf/what-is-the-value-of-al-register-when-using-interrupt-int-21h-service-
number-4ch

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4.1.22. Question: Which of the following instruction(s) can be performed only in CX r...
Which of the following instruction(s) can be performed only in CX register:
LOOP
MUL, DIV, CBW
ADD, SUB
Question: instructions performed in Counter register
Permalink: http://www.quizover.com/pdf/instructions-performed-in-counter-register

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4.1.23. Question: The maximum memory space addressable by 8086 processor was:
The maximum memory space addressable by 8086 processor was:
64 KB
640KB
1MB
Question: what was max memory space by 8086 processor?
Permalink: http://www.quizover.com/pdf/what-was-max-memory-space-by-8086-processor

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4.1.24. Question: the debug command: -E F000:01 2 3
the debug command: -E F000:01 2 3
Has no effect, because that location in ROM
Will write three bytes (1,2,3) starting at location F000:0
Depends on the processor
Question: debug command -E
Permalink: http://www.quizover.com/pdf/debug-command-e

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4.1.25. Question: The AX register full name is:
The AX register full name is:
Accumulator register
Counter register
Base register
Question: cpu Accumulator register
Permalink: http://www.quizover.com/pdf/cpu-accumulator-register

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4.1.26. Question: The operating system functions:
The operating system functions:
System boot
Running applications
Both correct
Question: What are the operating system functions?
Permalink: http://www.quizover.com/pdf/what-are-the-operating-system-functions

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4.1.27. Question: To increment both AL, AH registers:
To increment both AL, AH registers:
INC AX
INC ALINC AH
both (a) and (b) are correct
Question: How to increment a register?
Permalink: http://www.quizover.com/pdf/how-to-increment-a-register

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4.1.28. Question: If you add positive number plus negative number the over flow flag ...
If you add positive number plus negative number the over flow flag will be set if:
The result is negative
The result is positive
There is no over flow when adding (+ve) + (-ve) numbers
Question: Hoe overflow by addition is handled?
Permalink: http://www.quizover.com/pdf/hoe-overflow-by-addition-is-handled

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4.1.29. Question: The processor set the sign flag on when it detects
The processor set the sign flag on when it detects
The MSB of the result is 1
Negative number in AX register
Both (a) and (b) are correct
Question: What does the sign flag do?
Permalink: http://www.quizover.com/pdf/what-does-the-sign-flag-do

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4.1.30. Question: The result of logical operation: 1 OR 0
The result of logical operation: 1 OR 0
0
1
Question: logical operator OR
Permalink: http://www.quizover.com/pdf/logical-operator-or

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4.1.31. Question: The instruction AND AH,11110111 is equivalent to:
The instruction AND AH,11110111 is equivalent to:
Sub AH, 8,if 4th bit of AH is set
Sub AH, 8,if 4th bit of AH is cleared
Sub AH, 4,if 4th bit of AH is set
Question: instruction AND AH
Permalink: http://www.quizover.com/pdf/instruction-and-ah

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4.1.32. Question: The assembly directive is a command to:
The assembly directive is a command to:
The Assembler program
The Microprocessor
Question: What is assembly directive?
Permalink: http://www.quizover.com/pdf/what-is-assembly-directive

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4.1.33. Question: The limitation on The maximum memory space addressable by 8086 proc...
The limitation on The maximum memory space addressable by 8086 processor because:
It has only 14 registers
The register size was 16 bits
The address bus width was 20 bits
Question: Why the limitation on The maximum memory space by 8086 processor?
Permalink: http://www.quizover.com/pdf/why-the-limitation-on-the-maximum-memory-space-by-8086-processor

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4.1.34. Question: Who generates PSP for .COM programs:
Who generates PSP for .COM programs:
DOS generates PSP automatically preceding a COM program in the memory
The program itself
DOS load it from the disk
Question: Who generates PSP for .COM programs?
Permalink: http://www.quizover.com/pdf/who-generates-psp-for-com-programs

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4.1.35. Question: The result of logical operation: 1 XOR 1
The result of logical operation: 1 XOR 1
logic 0
logic 1
Question: logical operator XOR
Permalink: http://www.quizover.com/pdf/logical-operator-xor

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4.1.36. Question: The processor compute the address of the next instruction using
The processor compute the address of the next instruction using
CS:IP
DS:IP
CS:SP
Question: How the processor compute the address of the next instruction?
Permalink: http://www.quizover.com/pdf/how-the-processor-compute-the-address-of-the-next-instruction

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4.1.37. Question: You want to initialize the IP register with the value 2000:
You want to initialize the IP register with the value 2000:
Mov IP,2000
Jmp 2000
You can’t change IP register
Question: how to initialize the IP register?
Permalink: http://www.quizover.com/pdf/how-to-initialize-the-ip-register

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4.1.38. Question: What is the value of AX register after the following instruction, a...
What is the value of AX register after the following instruction, assume Mark stored at offset 1000
Mark DW 123
Mov AX,Mark
1000
123
Unknown
Question: AX register in assembly
Permalink: http://www.quizover.com/pdf/ax-register-in-assembly

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4.1.39. Question: The max size of .COM program:
The max size of .COM program:
Any size
1 segment (64k bytes)
Question: max size of .COM program
Permalink: http://www.quizover.com/pdf/max-size-of-com-program

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4.1.40. Question: how many bits in one double word?
how many bits in one double word?
8 bits
16 bits
32 bits
Question: bits in double word
Permalink: http://www.quizover.com/pdf/bits-in-double-word

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4.1.41. Question: You know that the data segment base address = 1234, so :how to init...
You know that the data segment base address = 1234, so :how to initialize DS register?
Mov DS,1234
Mov AX,1234,Mov DS,AX
Question: how to initialize DS register?
Permalink: http://www.quizover.com/pdf/how-to-initialize-ds-register

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4.1.42. Question: The result of logical operation: 0 OR 0
The result of logical operation: 0 OR 0
logic 0
logic 1
Question: logical operator OR in assembly
Permalink: http://www.quizover.com/pdf/logical-operator-or-in-assembly

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4.1.43. Question: The assembly directive is a command to:
The assembly directive is a command to:
The Assembler program
The Microprocessor
Question: The assembly directive
Permalink: http://www.quizover.com/pdf/the-assembly-directive

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4.1.44. Question: The mapping between the physical address and logical address (Segme...
The mapping between the physical address and logical address (Segment:Offset) is:
One to one relation
One to many relation
No relation
Question: What is the mapping between physical address and logical address?
Permalink: http://www.quizover.com/pdf/what-is-the-mapping-between-physical-address-and-logical-address

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4.1.45. Question: You want to set only odd numbered bits in AX register, so what is t...
You want to set only odd numbered bits in AX register, so what is the proper instruction:
Mov AX,5555h
OR AX,5555h
AND AX,5555h
Question: How to set only odd numbered bits in AX register?
Permalink: http://www.quizover.com/pdf/how-to-set-only-odd-numbered-bits-in-ax-register

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4.1.46. Question: How many bytes in one word
How many bytes in one word
1 byte
2 byte
4 byte
Question: How many bytes in one word?
Permalink: http://www.quizover.com/pdf/how-many-bytes-in-one-word

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4.1.47. Question: What is the value of Zero (Z) flag after the instruction: SUB AX,AX
What is the value of Zero (Z) flag after the instruction: SUB AX,AX
Set
Cleared
Unknown
Question: What is the value of Zero flag after SUB AX AX
Permalink: http://www.quizover.com/pdf/what-is-the-value-of-zero-flag-after-sub-ax-ax

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4.1.48. Question: The debug command U
The debug command U
Retrieve the assembly program instructions from the disk
Retrieve the assembly program instructions from the RAM
Convert the machine code stored in memory into assembly equivalent
Question: debug command U
Permalink: http://www.quizover.com/pdf/debug-command-u

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4.1.49. Question: Classify the following register(s) SI,DI
Classify the following register(s) SI,DI
Index registers
General purpose registers
Segment registers
Question: Index registers
Permalink: http://www.quizover.com/pdf/index-registers

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4.1.50. Question: What is the value of over flow (O) flag after the instruction: SUB...
What is the value of over flow (O) flag after the instruction: SUB AX,AX
Set
Cleared
Unknown
Question: What is the value of over flow flag after SUB AX AX
Permalink: http://www.quizover.com/pdf/what-is-the-value-of-over-flow-flag-after-sub-ax-ax

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4.1.51. Question: Compare between PSP and "header block"
Compare between PSP and "header block"
DOS generates PSP automatically preceding a COM program in the memory
DOS stores the "header block" on the disk with the EXE program file
Question: What is the difference between PSP and header block?
Permalink: http://www.quizover.com/pdf/what-is-the-difference-between-psp-and-header-block

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4.1.52. Question: How many bits in one byte?
How many bits in one byte?
8 bits
16 bits
32 bits
Question: How many bits in one byte?
Permalink: http://www.quizover.com/pdf/how-many-bits-in-one-byte

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4.1.53. Question: Memory segments can start every:
Memory segments can start every:
1 word (2 bytes)
1 byte
Question: Memory segments
Permalink: http://www.quizover.com/pdf/memory-segments

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4.1.54. Question: The .COM programs in RAM uses:
The .COM programs in RAM uses:
1 segment
4 different segments (code, data, stack, and extra)
More than 4
Question: How many segments .COM programs in RAM use?
Permalink: http://www.quizover.com/pdf/how-many-segments-com-programs-in-ram-use

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4.1.55. Question: What is the value of AX register after executing, MOV AX,456h,CMP...
What is the value of AX register after executing, MOV AX,456h,CMP AX,456h
456h
Zero
Unknown
Question: AX register
Permalink: http://www.quizover.com/pdf/ax-register

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4.1.56. Question: What is the length of the 8088’s physical address?
What is the length of the 8088’s physical address?
8 bits
16 bits
20 bits
Question: length of the 8088 processor physical address
Permalink: http://www.quizover.com/pdf/length-of-the-8088-processor-physical-address

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4.1.57. Question: You want to move two bytes from address 100 to 200, so what is the ...
You want to move two bytes from address 100 to 200, so what is the proper instruction:
Mov AX,[100],Mov [200],AX
Mov AH,[100],Mov [200],AH
Mov [200],[100]
Question: How to move bytes from address to another?
Permalink: http://www.quizover.com/pdf/how-to-move-bytes-from-address-to-another

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4.1.58. Question: The statement AGEDB25
The statement AGEDB25
Instructs the processor to store the value 25 into AX register
Instructs the assembler to store the value 25 into RAM, and use AGE as a reference
Both correct
Question: Command DB
Permalink: http://www.quizover.com/pdf/command-db

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4.1.59. Question: What about the Stack segment in .COM program during execution:
What about the Stack segment in .COM program during execution:
Must be defined explicitly in the program
DOS uses the high area of the COM program for the Stack
There is no stack for .COM program during execution
Question: Stack segment in .COM program
Permalink: http://www.quizover.com/pdf/stack-segment-in-com-program

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4.1.60. Question: The ROM BIOS contains:
The ROM BIOS contains:
MS-Dos operating system
MS-Windows operating system
Basic input ; output system routines
Question: What does ROM BIOS contain?
Permalink: http://www.quizover.com/pdf/what-does-rom-bios-contain

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4.1.61. Question: The function service number (4Ch) in interrupt (INT 21h):
The function service number (4Ch) in interrupt (INT 21h):
TSR terminate and stay resident
Abnormal program Termination
Normal program Termination
Question: function service number (4Ch)
Permalink: http://www.quizover.com/pdf/function-service-number-4ch

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4.1.62. Question: The maximum memory space addressable by a processor is proportional...
The maximum memory space addressable by a processor is proportional to:
Register size
Address bus width
Number of registers
Question: What is maximum memory proportional to?
Permalink: http://www.quizover.com/pdf/what-is-maximum-memory-proportional-to

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4.1.63. Question: You want to complement only odd numbered bits in AX register, so wh...
You want to complement only odd numbered bits in AX register, so what is the proper instruction:
Test AX,5555h
AND AX,5555h
XOR AX,5555h
Question: how to complement only odd numbered bits in AX register?
Permalink: http://www.quizover.com/pdf/how-to-complement-only-odd-numbered-bits-in-ax-register

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4.1.64. Question: The Debug program is a small MS-DOS utility and is usually useful in:
The Debug program is a small MS-DOS utility and is usually useful in:
Writing sophisticated applications and systems
Memory and disk management
Testing and fixing programs
Question: What is a debug program?
Permalink: http://www.quizover.com/pdf/what-is-a-debug-program

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