Binary quiz

Which of the following gives correct information about digital information and pixel? 

.

• Digital information stored in physical books and documents; pixels are different hexadecimal numbers

• Digital information represented using binary digits (0s and 1s) ; Pixel is a tiny dot or square of color in a digital image.

• Information transmitted through analog signals is digital information, and pixel is different value to encode characters.

• Digital  information stored on magnetic tapes, pixels are brushes to pait on your paper.

Which of the following statements about the hexadecimal number system is true?

• Hexadecimal uses a base-8 number system.

• Hexadecimal digits range from 0 to 9 only.

• The letter A represents the value 10 and E resresents the value 14 in hexadecimal.

• Hexadecimal is primarily used for representing negative numbers.

What is the decimal value of the binary number 11011?

• 27

• 9

• 13

• 17

What is the value of 25 in the binary number system?

• 11010

• 11001

• 1010

• 10101

Which of the following statements is/are correct?

 

I) The Hexadecimal number system uses 16 digits.

II) Binary is a base-2 number system, which means it uses only two digits: 0 and 1.

III) Using 3 bits we can generate 8 different values.

IV) If we use 8 bits we can represent 155 different values.

 

 

• I and II

•  I, II, IV

• II,III,IV

•  I, II and III

ASCII is a character encoding system in which each character is assigned a unique numerical value. The ASCII values corresponding to a subset of the characters (in the "Char" column) are displayed in the table below:        

 

Which of the following characters, in ASCII character encoding, is sequentially represented by the decimal (base 10) number 101 and the hexadecimal (base 16) number 6B?

• e and k

• e and j

• a and i

• j and h

In a digital image, each pixel is represented by a combination of color values. The colors are often expressed using hexadecimal notation. Consider the following pixels in a 24-bit color space:

 

Pixel 1: #ff0000

Pixel 2: #00ff00

Pixel 3: #0000ff

 

Which of the following is correct?

• Pixel 1 is green, Pixel 2 is blue

• Pixel 2 is green and Pixel 3 is blue

• Pixel 2 is blue and Pixel 3 is green

• Pixel 3 is red and pixel 2 is green

The RGB encoding scheme employs 24-bit sequences to display colors, assigning eight bits for each of the red, green, and blue components.

 

Which of the following is a true statement about the color encoded by the following binary sequence:

1111 1001

0101 1100

0000 1011

. 

• This color contains significant amount of red, small amount of blue and moderate amount of green

• This color is mostly green.

• This color contains significant amount of green, small amount of red.

• This color contains significant amount of red, moderate amount of green, and small amount of blue

If black is 0 and white is 1, which of the following binary codes represents the above shape?

• 
  01010

  10001

  01010

• 01010

  01110

  01010

   

• 
   

  10101

  10001

  10101

• 
   

  10111

  01110

  11101

Which function should you use to ask the program's user to enter a number?

 

• readLine

• readInt

• readBoolean

• read