Exam 2 Assembly

Question 1

The instruction SHL and SHR can be used on signed integers for bit shifting and preserve the sign

Answer 1

False

Question 2

The instruction MUL preforms unsigned integer multiplication ad accepts 1,2, or 3 operands

Answer 2

False

Question 3

The INC instructions takes a maximum of _operands

Answer 3

One

Question 4

When using MASM, the first operand is the _____ operand

Answer 4

Destination

Question 5

Symbolic constants can be used in MASM in lieu of variables when you have certain values in a program that never changes

Answer 5

True

Question 6

Strings are stored as DWORD arrays

Answer 6

False, strings are stored as byte

Question 7

The current location symbol in MASM is the dollar sign

Answer 7

True

Question 8

A semi colon is used for single-line comments

Answer 8

True

Question 9

The EQU directive can be used with the____ to determine the length of a string

Answer 9

Dollar sign

Question 10

To get the address of an operand in MASM you can use the offset directive with the LEA instruction

Answer 10

False

Question 11

Strings need to be null -terminated by using the literal value 0 as the last byte in MASM/NASM

Answer 11

True

Question 12

The_____ directive is used to declare a 32 bit signed integer variable in MASM

Answer 12

sdword

Question 13

IDIV can accept 1,2, or 3 operands

Answer 13

False

Question 14

Labels must be followed___by

Answer 14

Colon

Question 15

The instruction CWD converts the value in AX into DX:AX

Answer 15

True

Question 16

In MASM to add a new line in a string it is represented by the____hexadecimal values

Answer 16

0dh, 0ah

Question 17

___ are assembler specific commands that allow you todo many things, such as define variables, indicate memory segments, ad so on

Answer 17

Directive

Question 18

A variable that contains a memory address is an example of___addressing

Answer 18

Indirect

Question 19

When using QWORD value as an operand for the MUL instruction, the result will be stored in____

Answer 19

rdx:rax

Question 20

The IDIV instruction can accept___operands

Answer 20

One operand

Question 21

The NEG instructions changes a value from positive to negative by converting it into its____representation

Answer 21

Two’s complement

Question 22

An array is a collection of data spaced equally memory addresses based on the data type and is aliased to the first element

Answer 22

True

Question 23

Aligned data to ___ memory address can help the processor access data faster

Answer 23

Even address

Question 24

Preforming division with DIV using a 32-bit divided implies that the dividend must be stored in___

Answer 24

Edx:eax

Question 25

Instructions may not use operands

Answer 25

True

Question 26

The LENGTHOF directive returns the numbers of elements in an array

Answer 26

True

Question 27

Uninitialized variables are declared in the .bss section of the program in MASM

Answer 27

False

Question 28

IMUL can accept 1, 2, or 3 operands

Answer 28

True

Question 29

The IMUL instruction can accept __ operand(s)

Answer 29

One, two, or three operands

Question 30

The colon (:) represents a single line comment in MASM

Answer 30

False

Question 31

In the ADD and SUB instructions, the first and second operand is the destination and source, respectively

Answer 31

True

Question 32

To represent a literal number as a hexadecimal literal value, we use the postfix radiax ‘o’

Answer 32

False

Question 33

By default, integer literals are in base ___

Answer 33

10

Question 34

A value stored in the EBX register can be sign extended into EDX:EBX with the CDQ instructions

Answer 34

False

Question 35

When using MASM, the first operand is the ___ operand

Answer 35

Destination

Question 36

A ___ value is a value directly specified by the programmer rather than the result if an expression. EX: ‘A’

Answer 36

Immediate

Question 37

The directive DWORD is a 2-byte (16-bit) integer

Answer 37

False

Question 38

Character literals are represented as __ in memory

Answer 38

ascii

Question 39

The INC instruction takes a maximum of __ operands

Answer 39

One

Question 40

In order to use the base - 10 value 50 as a hexadecimal value in MASM/NASM you would specify it as ___

Answer 40

32h

Question 41

When using the DIV instructions and a 64-bit divisor, the quotient is stored in __ and the remainder in ___

Answer 41

Quotient: rax and remainder: rdx