IT EoY Test Y8

Question 1

What is a AND gate?

Answer 1

A gate that requires two positive inputs to output a positive. Requires two inputs.

Question 2

What is a OR gate?

Answer 2

A gate that only needs one positive input to output a positive. Requires two inputs.

Question 3

What is a NOT gate?

Answer 3

A gate that switches what the input was to the opposite. Only requires one input.

Question 4

What is a NAND gate?

Answer 4

It is like an AND gate, except combined with a NOT gate, so the output is the output of a AND gate but flipped.

Question 5

What is a NOR gate?

Answer 5

It is like an OR gate, except combined with a NOT gate, so the output is flipped to what it would be for an OR gate.

Question 6

What is a XOR gate?

Answer 6

A gate that is similar to a OR gate, but will only have an output of 1 if ONLY one of the inputs is 1. The output will be 0 if the inputs are either 0 and 0, or 1 and 1.

Question 7

What is a truth table?

Answer 7

A table that shows all of the possible inputs and outputs of a circuit.

Question 8

What is a circuit diagram?

Answer 8

A diagram that shows different gates and what would input/output from/to them.

Question 9

What would 10010 be in base-10?

Answer 9

18

Question 10

What is a binary shift?

Answer 10

A binary shift is moving a number in binary a certain number of places to the right or the left. A binary shift to the left by one place is multiplying the number by two, and shifting it two places to the left is multiplying it by four, and so on. A binary shift to the right by one place would by dividing it by two, and a binary shift two places to the right would be dividing by four.

Question 11

What would 203 be in base-16?

Answer 11

CB

Question 12

What is the denary number for the ASCII code for a capital A?

Answer 12

65

Question 13

How many bits long is an ASCII code?

Answer 13

7

Question 14

What is the binary number for the ASCII code for a capital A?

Answer 14

1000001 (hex 41)

Question 15

What is the denary number for the ASCII code for a lowercase a?

Answer 15

97

Question 16

What is the binary number for the ASCII code for a lowercase a?

Answer 16

1100001 (hex 61)

Question 17

How many bits long is extended ASCII?

Answer 17

8

Question 18

How many bits long is Unicode?

Answer 18

16, so that it can accommodate characters in other languages, like Chinese, or emojis.

Question 19

What is colour depth?

Answer 19

The amount of bits that a pixel stores. The bigger the colour depth, the more colours a pixel can be.

Question 20

The more pixels that are in an image, the bigger the…?

Answer 20

File size, and higher the resolution

Question 21

How do you make a rectangle in Inkscape?

Answer 21

You used the tool that is shaped like a rectangle.

Question 22

How do you make a square in Inkscape?

Answer 22

You hold ‘Ctrl’ as you use the rectangle tool, so you have a square.

Question 23

How do you make an ellipse in Inkscape?

Answer 23

You use the ellipse-shaped tool.

Question 24

How do you make a circle in Inkscape?

Answer 24

Use the ellipse tool, but hold down ‘Ctrl’.

Question 25

What is lossy compression?

Answer 25

Lossy compression is a data encoding method that reduces file size by permanently eliminating certain information, particularly redundant data.

Question 26

True or False: Lossless compression allows for the original data to be perfectly reconstructed from the compressed data.

Answer 26

True

Question 27

Which of the following formats is an example of lossy compression? A) ZIP B) JPEG C) PNG

Answer 27

B) JPEG

Question 28

Fill in the blank: Lossless compression is often used for ______ files, where data integrity is crucial.

Answer 28

text

Question 29

What is a common application of lossy compression?

Answer 29

Streaming audio and video files over the internet.

Question 30

Name one advantage of lossy compression.

Answer 30

Significantly smaller file sizes compared to lossless compression.

Question 31

What is the primary goal of lossless compression?

Answer 31

To reduce file size without losing any data.

Question 32

True or False: Lossy compression is suitable for all types of data.

Answer 32

False

Question 33

Which compression method is typically preferred for archiving documents, lossy or lossless?

Answer 33

Lossless

Question 34

What type of compression would you use for a high-quality image that needs to maintain detail?

Answer 34

Lossless compression.

Question 35

What is the crest of a wave?

Answer 35

The highest point of a wave.

Question 36

What is the trough of a wave?

Answer 36

The lowest point of a wave.

Question 37

What is the rest of a wave?

Answer 37

The middle line, where there's no sound.

Question 38

What is the amplitude of a wave?

Answer 38

The distance between the middle line and the crest/trough of a wave.

Question 39

What is the wavelength of a wave?

Answer 39

The distance between two corresponding points on a wave.

Question 41

What is lossless compression?

Answer 41

Lossless compression is a data compression technique that allows the original data to be perfectly reconstructed from the compressed data.

Question 42

True or False: Lossless compression reduces file size by permanently removing some data.

Answer 42

False

Question 43

Which of the following is an example of a lossless compression algorithm? A) JPEG B) PNG C) MP3

Answer 43

B) PNG

Question 44

Fill in the blank: Lossless compression is often used for _______ and _______ files.

Answer 44

text, executable

Question 45

Name one common lossless compression format.

Answer 45

ZIP

Question 46

What is the denary (decimal) equivalent of the binary number 1010?

Answer 46

The denary equivalent is 10.

Question 47

True or False: The binary number 1111 is equivalent to the denary number 15.

Answer 47

True.

Question 48

Convert the denary number 255 to hexadecimal.

Answer 48

The hexadecimal equivalent is FF.

Question 49

Fill in the blank: The binary number 1001 is equal to ______ in denary.

Answer 49

9

Question 50

What is the binary equivalent of the hexadecimal number A3?

Answer 50

The binary equivalent is 10100011.

Question 51

Multiple choice: What is the denary equivalent of the binary number 1101? A) 12 B) 13 C) 14 D) 15

Answer 51

B) 13

Question 52

Convert the hexadecimal number 1F to binary.

Answer 52

The binary equivalent is 00011111.

Question 53

True or False: The denary number 16 is represented as 10000 in binary.

Answer 53

True.

Question 54

What is the hexadecimal equivalent of the denary number 64?

Answer 54

The hexadecimal equivalent is 40.

Question 55

Fill in the blank: The binary number 0001 represents the denary number ______.

Answer 55

1