CS 2010 Fall 2025 Better Sample Final

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Question 1: Hardware Review (25 points)

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1a. Base Conversions (10 points)

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Perform the following base conversions. Show your work.

• Convert 547 (base 8) to binary.
• Convert 10110100 (base 2) to hexidecimal.
• Convert 10110100 (base 2, 8 bit signed) to hexidecimal.
• Convert 255 (decimal) to hex and binary.

1b. Two’s Complement (8 points)

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For 8-bit two’s complement:

1c. Boolean Logic (7 points)

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Simplify: Q = A'B + AC + A'BC' using Boolean algebra or K-map.

Write out the truth tables for

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• A and B
• A or B
• A xor B

What do the following computer components do?

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• Storage disk
• RAM
• CPU
• Network adapter

Question 2: Lua Basics (15 points)

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What does each of the following Lua programs print? Show step-by-step execution.

2a

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x = 5
if x > 3 then
  print("big")
else
  print("small")
end

2b

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local x = 3
for i = 1,4 do
  x = x + i
  print(i .. ": " .. x)
end

2c

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local x = 3
while x < 30 do
  print(x)
  if x < 10 then
    x = x * 5
  else
    x = x - 6
  end
end

4a. What does it print? (8 points)

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4a.1

local x = 7
print(x)

4a.2

local x = 7
function foo()
  print(x)
end
foo()

4a.3

local x = 7
function foo()
  local x = 9
  print(x)
end
foo()
print(x)

4a.4

local x = 7
function foo()
  local x = 9
  x = x + 2
  print(x)
end
foo()
print(x)

Question 5: Git and Github

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ssh-keygen creates two files:

• ~/.ssh/id_ed25519
• ~/.ssh/id_ed25519.pub

Which one has the key we should add to our github account to so we can push changes?

Networking

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What’s the difference between “http” and “https” in a URL?