Big Idea 2 Quiz

How many bits are there in a byte?

• 1

• 8

• 16

• 32

Answer explanation

A byte consists of 8 bits. Therefore, there are 8 bits in a byte, making the correct answer choice 8.

What can binary sequences represent?

• Only numbers

• Only colors

• Digital data like colors, Boolean logic, lists, etc.

• Only Boolean logic

Answer explanation

Binary sequences can represent digital data like colors, Boolean logic, lists, etc., not just numbers or colors alone.

How many bits are used to represent a single pixel in 16-bit mode RGB?

• 8 bits

• 16 bits

• 48 bits

• 6 bits

Answer explanation

In 16-bit mode RGB, each color channel (Red, Green, Blue) uses 16 bits, so for all three channels, it would be 16 bits * 3 = 48 bits to represent a single pixel.

How many bits are there in a 10 MP (16-bit mode) picture?

• 4,800,000 bits

• 48,000,000 bits

• 480,000,000 bits

• 4,800,000,000 bits

Answer explanation

To calculate the total bits in a 10 MP (16-bit mode) picture, multiply the resolution (10 million pixels) by the bit depth (16 bits per pixel) to get 160 million bits, which is equivalent to 480,000,000 bits.

What type of signals can computers understand?

• Analog signals

• Digital signals

• Both analog and digital signals

• Neither analog nor digital signals

Answer explanation

Computers can understand digital signals, making them the type of signals that computers can interpret and process effectively.

Analog signals are:

• Discrete and finite

• Continuous and can take on an infinite number of values

• Only represented by 0s and 1s

• Not used in physical phenomena

Answer explanation

Analog signals are continuous and can take on an infinite number of values, unlike discrete signals which are finite and limited.

What does sampling allow computers to do?

• Increase the number of digital signals

• Approximate analog signals

• Convert digital signals into analog signals

• Decrease the sampling rate

Answer explanation

Sampling allows computers to approximate analog signals by capturing discrete points of the signal at specific intervals, enabling the representation of continuous data in a digital format.

What is the relationship between sampling rate and quality?

• The lower the sampling rate, the better the quality

• The sampling rate has no effect on quality

• The higher the sampling rate, the better the quality

• Quality is determined by the number of digital signals only

Answer explanation

The higher the sampling rate, the better the quality. A higher sampling rate captures more data points, resulting in higher quality audio or video.

How many discrete, finite possibilities can 8 bit colors take on?

• 256

• 128

• 512

• 1024

Answer explanation

8 bit colors can take on 2^8 = 256 discrete, finite possibilities, hence the correct answer is 256.

What is the range of the value of an integer in JAVA?

• -2,147,483,648 to +2,147,483,647

• -1,073,741,824 to +1,073,741,823

• -3,221,225,472 to +3,221,225,471

• -4,294,967,296 to +4,294,967,295

Answer explanation

The range of an integer in JAVA is -2,147,483,648 to +2,147,483,647, making the first answer choice the correct one.