# Chapter 1 -assembler Data Representation

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Questions: 15 | Attempts: 417

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• 1.

### Specify the 3 computer trend waves

• A.

1st Wave, 2nd Wave, 3th Wave

• B.

Mechanical Wave, Electric Wave , Electronic Wave

• C.

None all of the Above

B. Mechanical Wave, Electric Wave , Electronic Wave
Explanation
The correct answer is Mechanical Wave, Electric Wave, Electronic Wave. These three waves represent different stages in the development of computer technology. The first wave refers to the use of mechanical devices such as punch cards and mechanical calculators. The second wave represents the shift towards electronic components like vacuum tubes and transistors. The third wave signifies the advent of integrated circuits and microprocessors, leading to the development of modern computers. These three waves highlight the progression and evolution of computer technology over time.

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• 2.

### The smallest unit of data on a binary computer is a single _____

bit
Explanation
A bit is the smallest unit of data on a binary computer. It can represent a value of either 0 or 1, and is used to store and transmit information in binary form. A collection of bits is used to represent larger units of data, such as bytes, which are commonly used to measure the size of files and memory.

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• 3.

### The hexadecimal code(BCD) represent _____ different values

16
Explanation
The hexadecimal code (BCD) represents 16 different values. Hexadecimal is a base-16 number system, which means it uses 16 distinct symbols to represent numbers. These symbols include the digits 0-9 and the letters A-F. Each digit in a hexadecimal number represents a value from 0 to 15. Therefore, with 16 different symbols available, the hexadecimal code can represent 16 different values.

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• 4.

### The byte is considered as the most important data structures used by the 80x86 micropocesor

• A.

True

• B.

False

A. True
Explanation
The byte is considered as the most important data structure used by the 80x86 microprocessor because it is the fundamental unit of storage in computer systems. The microprocessor operates on data in the form of bytes, which are 8-bit units of information. All other data types, such as integers, characters, and floating-point numbers, are represented and manipulated using bytes. Therefore, the byte is crucial for performing calculations, storing data, and executing instructions in the 80x86 microprocessor architecture.

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• 5.

### Right shift operation moves each bit in a bits string one psition to the right replacing with 0 high bit and carry out bit 0

• A.

True

• B.

False

A. True
Explanation
The explanation for the given correct answer is that the right shift operation indeed moves each bit in a bit string one position to the right. This means that the high bit, which is the leftmost bit, is replaced with a 0 and the carry out bit, which is the rightmost bit, is shifted out. Therefore, the statement is true.

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• 6.

### Main processor that establishes the basic Instruction Set is Intel's x8086

• A.

True

• B.

False

B. False
Explanation
The given statement is false. Intel's x8086 is not the main processor that establishes the basic Instruction Set. The correct answer is not provided.

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• 7.

### Left shift operation moves each bit in a bits string one psition to the left replacing with 0 low bit and carry out bit 7

• A.

True

• B.

False

A. True
Explanation
The left shift operation in a bit string moves each bit one position to the left. The low bit is replaced with a 0, and the carry out bit 7 is determined. This means that the leftmost bit is lost and a 0 is added at the rightmost position. Therefore, the given statement is true.

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• 8.

### Its considered as a pair of words

• A.

• B.

Double Word

• C.

None all of above

B. Double Word
Explanation
The given options consist of pairs of words. "Quad Byte" is a pair of words that does not have any specific meaning or association. "Double Word," on the other hand, is a pair of words commonly used in computer architecture to refer to a data type that is twice the size of a word. Therefore, "Double Word" is the correct answer as it is a meaningful pair of words with a specific context.

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• 9.

### Is the smalles addressable datum on the x86 processors

• A.

Byte

• B.

KByte

• C.

A single Bit

• D.

All above are correct

C. A single Bit
Explanation
The correct answer is a single bit. A bit is the smallest addressable datum on x86 processors. It represents a binary value of either 0 or 1 and is used to store and manipulate data at the most basic level in computer systems. In contrast, a byte is composed of 8 bits and a kilobyte (KByte) is equal to 1024 bytes. Therefore, the statement "All above are correct" is not accurate as a bit is the smallest unit of data on x86 processors.

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• 10.

### Bit ___ is the low order bit or least significant / bit 7 is considered as the   _______ or the highest significant bit of a byte

H.O.
L.O.
Explanation
The given question is asking for the terms used to refer to the low order bit and the high order bit of a byte. The low order bit is also known as the least significant bit (L.O.), while the high order bit is referred to as the most significant bit (H.O.).

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• 11.

### Bit 0..3 compromise the ___________ bits 4..7 form the _______ nibble

L.O.
H.O.
Explanation
The given answer is correct because in binary representation, the bits 0 to 3 represent the lower order (L.O.) bits, while the bits 4 to 7 represent the higher order (H.O.) bits. Therefore, bit 0 to 3 compromise the L.O. and bits 4 to 7 form the H.O. nibble.

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• 12.

### A group of 16 bits from 0 up to fifteen is considered as

• A.

Double Byte

• B.

16 Bits

• C.

Word

• D.

None all above

C. Word
Explanation
A group of 16 bits from 0 up to fifteen is considered as a word. In computer architecture, a word is the natural unit of data used by a particular computer architecture or operating system. It is typically the largest size of data that can be efficiently processed by the computer's hardware. In this case, 16 bits make up a word, which is the correct answer.

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• 13.

### A collection of bits can be represented by

• A.

Nibbles

• B.

Bytes

• C.

Words and Double Words

• D.

None all of the above

A. Nibbles
B. Bytes
C. Words and Double Words
Explanation
A collection of bits can be represented by nibbles, bytes, words, and double words. A nibble is a collection of 4 bits, a byte is a collection of 8 bits, a word is typically 2 bytes or 16 bits, and a double word is usually 4 bytes or 32 bits. Therefore, all of the options mentioned (nibbles, bytes, words, and double words) can be used to represent a collection of bits.

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• 14.

### A byte can represent 256 numberic values in the range 0..256 and signed numbers in range -____To +_______

128
127
Explanation
A byte can represent 256 numeric values in the range 0 to 255. However, when it comes to representing signed numbers, one bit is used to indicate the sign, leaving only 7 bits to represent the magnitude of the number. This means that the range for signed numbers is -128 to +127.

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• 15.

### A binary signed number is considered as positive when H.O is equal to _______ and negative when H.O is equal to ____ type your answer as a number

0
1
Explanation
In a binary signed number, the most significant bit (H.O) determines whether the number is positive or negative. When the H.O is equal to 0, the number is considered positive. Conversely, when the H.O is equal to 1, the number is considered negative.

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• Mar 22, 2023
Quiz Edited by
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• Feb 18, 2012
Quiz Created by
Marlonorellana20

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