Module 4 - Data Representation

Question 1

In the field below, enter the 8-bit binary representation of the decimal value 46.

Answer 1

00101110

Question 2

In the field below, enter the 8-bit binary representation of the decimal value 24.

Answer 2

00011000

Question 3

In the field below, enter the decimal representation of the binary value 00010110.

Answer 3

22

Question 4

A binary "0" is represented by what physical phenomena in a modern computer?
  High Current
  Low Current
  High Voltage
  Mechanical contacts closed.
  Low Voltage

Answer 4

Low Voltage

Question 5

A binary "1" is represented by what physical phenomena in a modern computer?
  Low Current
  High Current
  Low Voltage
  Mechanical contacts closed.
  High Voltage

Answer 5

High Voltage

Question 6

In the field below, enter the 8-bit binary representation of the decimal value 31.

Answer 6

00011111

Question 7

In the field below, enter the decimal representation of the binary value 00111010.

Answer 7

58

Question 8

In the field below, enter the decimal representation of the binary value 00100001.

Answer 8

33

Question 9

How many symbols are used in the binary number system?

Answer 9

2

Question 10

A binary "1" is represented by what physical phenomena in a modern computer?
  High Current
  High Voltage
  Low Voltage
  Low Current
  Mechanical contacts closed.

Answer 10

High Voltage

Question 11

In the field below, enter the hexadecimal representation of the binary value 0000011100100000 using 4 hex places.

Answer 11

0720

Question 12

In the field below, enter the decimal representation of the hexadecimal value 0x0444.

Answer 12

1092

Question 13

In the field below, enter the hexadecimal representation of the binary value 0000101010110101 using 4 hex places.

Answer 13

0AB5

Question 14

In the field below, enter the hexadecimal representation of the decimal value 1708 using 4 hex places.

Answer 14

06AC

Question 15

In the field below, enter the hexadecimal representation of the decimal value 124 using 4 hex places.

Answer 15

007C

Question 16

In the field below, enter the decimal representation of the 2’s complement value 11100010.

Answer 16

-30

Question 17

In the field below, enter the 2’s complement representation of the decimal value -1 using 8 bits.

Answer 17

11111111

Question 18

In the field below, enter the decimal representation of the 2’s complement value 11011100.

Answer 18

-36

Question 19

In the field below, enter the decimal representation of the 2’s complement value 11110000.

Answer 19

-16

Question 20

In the field below, enter the decimal representation of the 2’s complement value 11111010.

Answer 20

-6

Question 21

What indicates a negative number in the two’s complement representation?
  The least significant bit is 1
  The most significant bit is 1
  The least significant bit is 0
  The most significant bit is 0

Answer 21

The most significant bit is 1

Question 22

In the field below, enter the binary result of the following calculation.
The numbers are given 8-bit 2’s complement format, and can be positive or negative.
Your answer should also be provided as 8-bit 2’s complement format.
11010001 + 11110101 = ?

Answer 22

0b11000110

Question 23

In the field below, enter the binary result of the following calculation.
The numbers are given 8-bit 2’s complement format, and can be positive or negative.
Your answer should also be provided as 8-bit 2’s complement format.
11001010 + 00101001 = ?

Answer 23

0b11110011
11110011
0b 11110011

Question 24

In the field below, enter the binary result of the following calculation.
The numbers are given 8-bit 2’s complement format, and can be positive or negative.
Your answer should also be provided as 8-bit 2’s complement format.
11110011 + 11110111 = ?

Answer 24

0b 11101010
0b11101010
11101010

Question 25

In the field below, enter the binary result of the following calculation.
The numbers are given 8-bit 2’s complement format, and can be positive or negative.
Your answer should also be provided as 8-bit 2’s complement format.
00101110 + 00001000 = ?

Answer 25

0b00110110
00110110
0b 00110110

Question 26

Which of the following are causes of underflow?
Subtracting from a variable when its value is at the upper end of the datatype range.
Adding to a variable when its value is at the upper end of the datatype range.
Adding to a variable when its value is at the lower end of the datatype range.
Subtracting from a variable when its value is at the lower end of the datatype range.

Answer 26

Subtracting from a variable when its value is at the lower end of the datatype range.

Question 27

A variable of type signed int stores a value of -2147483648, If the variable value is incremented what exception will occur?
Overflow.
Underflow.
No exception.

Answer 27

No exception.

Question 28

A variable of type signed int stores a value of -2147483648, If the variable value is decremented what exception will occur?
Underflow.
Overflow.
No exception.

Answer 28

Underflow.

Question 29

A variable of type unsigned char stores a value of 255. If the variable value is incremented, what exception will occur?
No exception.
Underflow.
Overflow.

Answer 29

Overflow.

Question 30

A variable of type unsigned int stores a value of zero. If the variable value is incremented, what exception will occur?
Overflow.
No exception.
Underflow.

Answer 30

No exception.

Question 31

In which of the following situations will endianness become an issue?
Transferring a memory block from a Little-Endian processor to a Little-Endian processor.
Transferring a memory block from a Big-Endian processor to a Big-Endian processor.
Transferring a memory block from a Big-Endian processor to a Little-Endian processor.
Transferring a memory block from a Little-Endian processor to a Big-Endian processor.

Answer 31

Transferring a memory block from a Big-Endian processor to a Little-Endian processor.
Transferring a memory block from a Little-Endian processor to a Big-Endian processor.

Question 32

Select the definition of big-endian.
The most significant bit of a single byte datatype is stored at a lower address than the least significant bit.
The least significant bit of a single byte datatype is stored at a lower address than the most significant bit.
The least significant byte of a multi-byte datatype is stored at a lower address than the most significant byte.
The most significant byte of a multi-byte datatype is stored at a lower address than the least significant byte.

Answer 32

The most significant byte of a multi-byte datatype is stored at a lower address than the least significant byte.