Week 1

Question 1

First general purpose electronic digital computer?

Answer 1

ENIAC

1946

Question 2

First programmable binary digital computers? Year?

Answer 2

EDSAC 1949

Question 3

What is a microcode?

Answer 3

Microcode- is a set of detailed hardware level instructions used to implement machine language instructions.

Question 4

Why is microcode used?

Answer 4

Microcode reduces complexity and simplifies design.

Question 5

Integer data types?

Answer 5

Unsigned
Signed(Sign magnitude and two complement)

Question 6

What is unsigned integer?

Answer 6

Zero and positive numbers.
2^8 = 256 different integers
Min 0 Max 255

Question 7

What is a signed integer?

Answer 7

Whole numbers plus negative numbers.
If very left = 0, then its positive
1, then its negative

Question 8

What is lossless compression?

Answer 8

Lossless compression reduces the size of data without losing or changing any information.
Eg. Zip

Question 9

What is compression ratio?

Answer 9

The effectiveness of the compression method.

10:1 one tenth of original size.

Question 10

What is lossy compression?

Answer 10

Lossy compression algorithms change or discard some of the data in a way that is hard to notice for human senses.

Question 11

Specify some of compression ratios:

Answer 11

JPEG - 10:1 or 20:1
Mp3 - 10:1
Mpeg- 100:1 to 200:1