CS 271 Module 1 Summary Exercises
Compared to higher-level languages, which of the following are benefits of Assembly Language programming? (Check all that apply) - Ease of Use - Integrated Tools - Hands-on Code Optimization - Direct Manipulation of Memory - Intuitive Programs
- Hands-on Code Optimization - Direct Manipulation of Memory
Which of the following are components of the Control Unit? (Check all that apply) - Multi-Purpose Registers - Instruction Pointer - Status Register - Instruction Register - ALU
- Instruction Pointer - Status Register - Instruction Register
In the IA-32 architecture, which of the following are valid 16-bit register references? - AH - BL - CX - ESI - SP - SS
- SP - CX - SS
What is the range of decimal values for a signed BYTE? -127 to 128 -128 to 128 -127 to 127 -128 to 127
-128 to 127
What is the range of decimal values for an unsigned DWORD? 0 to 4,294,967,296 -2,147,483,648 to 2,147,483,648 0 to 4,294,967,295 -2,147,483,648 to 2,147,483,647
0 to 4,294,967,295
Complete the following unsigned Binary Subtraction: 0111 0000 - 0110 1110 ----------
0000 0010
Which of the following binary values is equivalent to hexadecimal 4A2B? 0100 1010 1010 1011 0100 1010 0010 1011 0100 1010 0010 1101 0110 1011 0010 1001
0100 1010 0010 1011
Complete the following unsigned Binary Subtraction: 1100 1000 - 0110 0100 ----------
0110 0100
Which of the following binary values is equivalent to hexadecimal 7CBE? 0111 1011 1011 1100 0111 1101 1011 1110 0111 1100 1100 1110 0111 1100 1011 1110
0111 1100 1011 1110
Complete the following Unsigned Binary Addition (answers should also be in Binary): 1011 1010 + 1010 0001 ----------
1 0101 1011
How many bits long is a WORD on x86 systems?
16
Convert the following signed SWORD to a decimal value. 0011 1111 1010 1011
16,299
What is the largest unsigned integer that may be stored in 24 bits? 65,536 1,048,576 32,767 16,777,215
16,777,215
Complete the following unsigned Hexadecimal Subtraction: C48A - AACC ------
19BE
Complete the following unsigned Hexadecimal Subtraction: C6F1 - A735 ------
1FBC
How much memory can be addressed in Real-address mode? - 640K - 16MB - 4GB - 1MB
1MB
Which list contains the correct hexadecimal translation (in order) of the following unsigned decimal integers: 33, 95, 257 21, 5F, 101 21, 62, 103 22, 5E, 11A 6A, 5F, 101
21, 5F, 101
What is the largest signed integer that may be stored in 32 bits? 231 - 1 231 232 232 - 1
231 - 1
Convert the following unsigned WORD to a decimal value. 1011 1110 0100 1011
48,715
Convert the following string into its ASCII hex representation: Science Don't use 0x or h to represent the hex values. For example, the ASCII hex representation for "1+z" is 31 2B 7A
53 63 69 65 6E 63 65
Convert the following unsigned WORD to a decimal value. 1111 1010 0000 1111
64,015
Convert the following signed SWORD to a decimal value. 0010 0000 0110 1001
8,297
Complete the following Unsigned Hexadecimal Addition (answers should also be in Hexadecimal): 2C26 + 572B ------
8,351
Complete the following Unsigned Hexadecimal Addition (answers should also be in Hexadecimal): 2C27 + 573B ------
8362
What unit on a CPU chip is responsible for computing basic addition and subtraction operations? - Control Unit - ALU - I/O - FPU
ALU
What mechanism is used to turn Assembly Language code to Machine Code? - Compiler - Translator - Cross Compiler - Assembler
Assembler
Convert the following ASCII hex representation to a character string: 43 6F 6D 70 75 74 65 72 Do not add any spaces. For example, the hex 31 2B 7A represents the string: 1+z
Computer
What type of tool can convert ARM Assembly to x86 Assembly? - Cross Assembler - Linker - Loader - Cross Compiler
Cross Assembler
If an integer's sign bit is 1, the integer is positive. (True/False)
False
The ASCII code values for alphabetic letters (e.g. 'a') are smaller than for decimal digits (e.g. '1'). (True/False)
False
The CPU clock cycle length is the only contributing factor to the speed of operations on a computer. (True/False)
False
The Stack Segment register always points to the top of the runtime stack. (True/False)
False
Convert the following ASCII hex representation to a character string: 46 6C 6F 61 74 69 6E 67 Do not add any spaces. For example, the hex 31 2B 7A represents the string: 1+z
Floating
An Assembly Language is defined by the . . . - Assembler (e.g. MASM) - Language Hierarchy Level - Instruction Set Architecture (ISA)
Instruction Set Architecture (ISA)
Language Hierarchy: Rank the following languages from low level (1) to high level (4). - Machine Code - English - ARM Assembly - Python
Level 4 (Highest Level): English Level 3: Python Level 2: ARM Assembly Level 1 (Lowest level): Machine Code
Parity flag
Status flag that is set if the least-significant byte in the result contains an even number of 1 bits
Carry flag
Status flag that is set when an unsigned arithmetic operation generates a carry (or borrow) out of the most significant bit of the result
Overflow flag
Status flag that is set when the result of a signed arithmetic operation is too large or too small to fit into the destination
Sign flag
Status flag that is set when the result of an arithmetic or logical operation generates a negative result
Zero flag
Status flag that is set when the result of an arithmetic or logical operation generates a result of zero
Put the Instruction Execution steps in the correct order: - If the output operand is in memory, the control unit uses a write operation to store the data. - The control unit increments the Instruction Pointer (IP, also known as instruction counter) - The control unit fetches the next instruction from the instruction queue. - The ALU executes the instruction using the named registers and internal registers as operands. - If the instruction uses an input operand located in memory, the control unit uses a read operation to retrieve the operand and copy it into internal registers. - The control unit decodes the instruction's function to determine what the instruction will do.
Step 1: The control unit fetches the next instruction from the instruction queue. Step 2: The control unit increments the Instruction Pointer (IP, also known as instruction counter) Step 3: The control unit decodes the instruction's function to determine what the instruction will do. Step 4: If the instruction uses an input operand located in memory, the control unit uses a read operation to retrieve the operand and copy it into internal registers. Step 5: The ALU executes the instruction using the named registers and internal registers as operands. Step 6: If the output operand is in memory, the control unit uses a write operation to store the data.
Adding 7Fh and 05h in an 8-bit register sets the Overflow flag. (True/False)
True
In a Von Neumann architecture, each instruction in a program may be individually addressed and accessed. (True/False)
True
The linker combines object files into an executable file. (True/False)
True
The status flags are implemented as individual bits within the Status & Control Register. (True/False)
True
A ______ is a set of parallel wires used to conduct a group of electrical signals simultaneously.
bus
The three types of buses connected to the CPU are: - fetch-decode, control, execution - data, system, address - data, address, control - address, control, memory
data, address, control
During which phase of the instruction execution cycle is the instruction pointer incremented? - fetch - execute - operand fetch - decode
fetch
A signed integer stores the sign in the ___________________.
most significant bit (MSB)
Which of the following best describes the relationship from assembly language instructions to machine language instructions? - nearly one to one - many to one - many to many - one to many
nearly one to one
A __________ is a container for data which resides on the CPU chip.
register
The two's complement of an binary value is formed by which process? - changing the highest bit to a 1 - adding 2 and reversing the bits - adding 1 and reversing the bits - reversing (inverting) the bits and adding 1
reversing (inverting) the bits and adding 1
