AP CSP Mobile CSP Midterm Review

Which of the following statements about abstraction is true?

• Abstraction requires users to understand the low-level details of a system.
• Abstraction reduces information and detail to facilitate focus on relevant concepts.
• Abstraction increases the run-time complexity of a program.
• Abstraction compresses a program file to reduce file size.

Trace the value of an integer variable n in the following code.
i ← 1
n ← 2
REPEAT until i = 4
{
  n ← n * 2
  i ← i + 1
}

  What is n?

• 4
• 8
• 16
• 32

What is the number 45 as a binary number?

• 10011111
• 00001100
• 00101101
• 10101010

What is Abstraction?

• The use of computers to solve problems.
• Representing 'real world' problems in a computer using variables and symbols and removing unnecessary elements
• Breaking down a large problem into smaller sub-problems.
• Identifying the steps involved in solving a problem.

What does Protocol mean?

• Security
• Rules
• Orders
• Services

A new or improved idea, device, product, etc, or the development thereof.

• Innovation

• Technology

• Improvement

• Protocol

A way of representing information using only two options.

• BInary

• Doubled

• Algorithm

• Hexadecimal

A contraction of "Binary Digit"; the single unit of information in a computer, typically represented as a 0 or 1

• Bit

• Character

• BInar

• BiDig

A set of rules governing the exchange or transmission of data between devices.

• Protocol

• Guideline

• Packet

• Command

Instructions for a computer.

• Code

• Comand

• Protocol

• Direction