2.1.2 Flowcharts and algorithms

A program halts and prints an error message, define this error

• Linear

• Sum

• Logic

• Syntax

Identify the purpose of the following flowchart symbol

• Input/Output

• Output

• Start/Stop

• Decision

Identify the purpose of the following flowchart symbol

• Input/Output

• Sub program

• Process

• Decision

Identify the purpose of the following flowchart symbol

• Input/Output

• Sub program

• Process

• Decision

Identify the purpose of the following flowchart symbol

• Process

• Input/Output

• Sub program

• Decision

Identify the purpose of the following flowchart symbol:

• Process

• Input/Output

• Sub program

• Decision

How many arrows should come out of a decision symbol in a flowchart?

• 0

• 1

• 2

• 3

The following algorithm should take as input and add together two numbers, outputting the result. Identify the correct algorithm.

• num1 = input(“Enter the first number”)

  num2 – input(“Enter the second number”)

  num3 = num1 + num2 print(num3)

• num1 = input(“Enter the first number”)

  num2 = input(“Enter the second number”)

  num3 = num1 + num2 print(num3)

• num1 = input(“Enter the first number”)

  num3 = input(“Enter the second number”)

  num3 = num1 + num2 print(num3)

• num1 = input(“Enter the first number”)

  num2 = input(“Enter the second number”)

  num3 = num1 + num2 print(num2)

The following algorithm should take as input on number, and output the 12 times table for that number. Identify the correct algorithm.

• number = input(“Enter a number”)

  for x = 1 to 12

  print(number * x)

  next x

• number = input(“Enter a number”)

  for x = 0 to 12

  print(number * x)

  next x

• number = input(“Enter a number”)

  for x = 1 to 12

  print(number X x)

  next x

• number = input(“Enter a number”)

  for x = 1 to 12

  print(number * number)

  next x

The following algorithm should take as input two numbers, add them together, multiply the answer by 11, add 4, then divide by 2. It should output the result. Identify the correct algorithm.

• number = input(“Enter a number”)

  number = input(“Enter the second number”)

  final = (((number + number) * 11) + 4) / 2

  print (final)

• number = input(“Enter a number”)

  number2 = input(“Enter the second number”)

  final = (((number + number2) * 11) + 4) * 2

  print (final)

• number = input(“Enter a number”)

  number2 = input(“Enter the second number”)

  final = number + number2 +4 *11 / 2

  print (final)

• number = input(“Enter a number”)

  number2 = input(“Enter the second number”)

  final = (((number + number2) * 11) + 4) / 2

  print (final)