Chapter 1: Introduction to Assembly Language
1. What is the primary difference between high-level languages and assembly
language?
o A) High-level languages are machine-dependent
o B) Assembly language is more abstract than high-level languages
o C) Assembly language provides direct control over hardware
o D) High-level languages are faster than assembly language
2. What does an assembler do in the assembly language process?
o A) Translates source code to machine code
o B) Debugs the program
o C) Manages memory
o D) Creates high-level language programs
3. Which of the following is NOT a reason to learn assembly language?
o A) It allows low-level hardware control
o B) It helps in understanding how high-level languages work
o C) It provides faster execution times than high-level languages
o D) It is required for all software development
4. Which component of the computer system directly interacts with assembly language
instructions?
o A) Operating System
o B) Processor (CPU)
o C) Compiler
o D) Database
5. What is a "label" in assembly language programming?
o A) A variable name
o B) A memory address used for data storage
o C) A name assigned to a particular line or section of code
o D) A special type of instruction
Chapter 2: The x86 Processor and its Instruction Set
6. Which register is primarily used to hold the return address in a function call?
o A) AX
o B) BX
o C) IP (Instruction Pointer)
o D) SP (Stack Pointer)
7. What is the size of a general-purpose register in the x86 architecture?
o A) 8 bits
o B) 16 bits
o C) 32 bits
o D) 64 bits
8. What is the purpose of the MOV instruction?
o A) Perform a logical operation
o B) Move data between registers or memory
o C) Jump to another part of the program
o D) Add two values together
9. Which of the following is an addressing mode in the x86 architecture?
o A) Direct addressing
o B) Indirect addressing
o C) Indexed addressing
o D) All of the above
10. In x86 assembly, which instruction is used to perform a comparison between two
values?
o A) ADD
o B) CMP
o C) MOV
o D) SUB
Chapter 3: Assembly Language Programming Basics
11. What is the correct format for a simple assembly language program?
o A) [Label] instruction operand
o B) instruction [Label] operand
o C) operand [instruction] label
o D) Label operand instruction
12. Which directive is used to define a data segment in an assembly program?
o A) CODE
o B) DATA
o C) .TEXT
o D) .DATA
13. What does the instruction PUSH AX do in assembly language?
o A) Loads a value into the AX register
o B) Decreases the stack pointer
o C) Increases the stack pointer
o D) Pushes the value of the AX register onto the stack
14. What does the instruction POP BX do in assembly language?
o A) Loads a value into the BX register from memory
o B) Pops a value from the stack and stores it in the BX register
o C) Pops a value from the BX register onto the stack
o D) Increases the value in the BX register
15. Which of the following is the correct syntax for a comment in assembly language?
o A) // comment
o B) /* comment */
o C) ; comment
o D) # comment
Chapter 4: Data Representation
16. What is the binary representation of the decimal number 13?
o A) 1101
o B) 1110
o C) 1011
o D) 1001
17. Which number system uses only the digits 0 and 1?
o A) Binary
o B) Octal
o C) Decimal
o D) Hexadecimal
18. Which of the following is the hexadecimal equivalent of the binary number 1011?
o A) B
o B) 3
o C) A
o D) 5
19. What does the ASCII code represent?
o A) Characters in a computer system
o B) Machine-level instructions
o C) Binary values of integers
o D) Memory addresses
20. Which is the largest value that can be represented in 8 bits in binary?
o A) 255
o B) 128
o C) 512
o D) 1024
21. What is the purpose of the CMP instruction in assembly language?
o A) To compare two values
o B) To perform addition
o C) To move data between registers
o D) To jump to a different section of the program
22. Which of the following is a valid addressing mode in x86 assembly?
o A) Immediate addressing
o B) Register addressing
o C) Direct addressing
o D) All of the above
23. Which register holds the status flags in the x86 architecture?
o A) AX
o B) BX
o C) FLAGS
o D) SP
24. Which instruction is used to jump to a specific address in the program?
o A) MOV
o B) JMP
o C) ADD
o D) INC
25. What is the value of the hexadecimal number F3?
o A) 243
o B) 243
o C) 243
o D) 15
26. In assembly language, which is the smallest unit of data that can be moved between
memory and registers?
o A) Word
o B) Byte
o C) Double word
o D) Quad word
27. How do you represent the decimal number 255 in hexadecimal?
o A) FF
o B) 99
o C) 8F
o D) 7F
28. Which instruction is used to add two values in x86 assembly?
o A) ADD
o B) MOV
o C) SUB
o D) JMP
29. In the x86 architecture, which register is primarily used to store the result of
arithmetic operations?
o A) AX
o B) BX
o C) CX
o D) DX
30. Which of the following is an example of immediate addressing mode?
o A) MOV AX, 5
o B) MOV AX, BX
o C) MOV [BX], AX
o D) MOV AX, [500]
Additional MCQs (General Knowledge of Assembly Language)
31. Which of the following is a characteristic of assembly language programming?
o A) It is easier to write than high-level languages
o B) It allows direct control over hardware
o C) It is independent of the machine architecture
o D) It has no relationship to machine code
32. Which x86 register is used to store the result of a multiplication operation?
o A) AX
o B) DX
o C) CX
o D) BX
33. What is the role of the LEA instruction in x86 assembly?
o A) Loads the effective address of a memory operand
o B) Loads a constant value into a register
o C) Adds two values
o D) Moves data between registers
34. Which of the following is NOT a type of instruction in assembly language?
o A) Data transfer instruction
o B) Arithmetic instruction
o C) Jump instruction
o D) Network instruction
35. What does the JZ instruction do in assembly language?
o A) Jumps if the zero flag is set
o B) Jumps if the carry flag is set
o C) Jumps if the sign flag is set
o D) Jumps unconditionally
36. In x86 assembly, the CALL instruction is used for:
o A) Jumping to another part of the program
o B) Calling a subroutine
o C) Moving data between registers
o D) Pushing data to the stack
37. Which addressing mode uses a constant value in an instruction?
o A) Immediate addressing
o B) Register addressing
o C) Indirect addressing
o D) Direct addressing
38. Which register holds the base address for the stack in x86?
o A) BP
o B) SP
o C) AX
o D) CX
39. Which of the following is NOT a valid operand in x86 assembly?
o A) Immediate value
o B) Register
o C) Variable name
o D) Memory address
40. What is the purpose of the NOP instruction in assembly language?
o A) It performs a no-operation action
o B) It moves data between registers
o C) It performs arithmetic operations
o D) It jumps to another address
41. What is the purpose of the STC instruction?
o A) Set carry flag
o B) Stop the program
o C) Start a computation
o D) Set zero flag
42. Which of the following is an example of a word in x86 assembly?
o A) 2 bytes
o B) 1 byte
o C) 4 bytes
o D) 8 bytes
43. What does the DIV instruction do in x86 assembly?
o A) Divides two values
o B) Adds two values
o C) Multiplies two values
o D) Subtracts two values
44. What is the default size of the AX register in 16-bit x86 assembly?
o A) 8 bits
o B) 16 bits
o C) 32 bits
o D) 64 bits
45. Which of the following instructions is used to subtract two values in assembly
language?
o A) SUB
o B) ADD
o C) MOV
o D) JMP
46. Which of the following instructions is used to compare two values?
o A) CMP
o B) ADD
o C) MOV
o D) INC
47. Which addressing mode uses a register as an operand?
o A) Immediate addressing
o B) Register addressing
o C) Direct addressing
o D) Indirect addressing
48. In assembly language, what does the instruction XOR AX, AX do?
o A) Resets the AX register to 0
o B) Adds two values in AX
o C) Subtracts two values from AX
o D) Performs a logical AND on AX
49. Which of the following registers is used as a counter for looping operations in x86
assembly?
o A) CX
o B) BX
o C) AX
o D) DX
50. What is the size of a double word in x86 assembly?
o A) 2 bytes
o B) 4 bytes
o C) 8 bytes
o D) 16 bytes
