IT1X54 Programming Essentials Week 2

x = 1

y = x

x = y + 2

y = y + y

What is the final value of x and y?

• x = 3

  y = 4

• x = 4

  y = 2

• x = 2

  y = 4

• x = 3

  y = 2

What are variables and which is the correct example of a variable?

• They are memory locations used to store data. x in x = 1 is a variable.

• They are data stored in memory locations. 1 in x = 1 is a variable.

• They are memory locations used to store data. 1 in x = 1 is a variable.

• They are data stored in memory locations. x in x = 1 is a variable.

Which of the following are valid variables?

• name

• 1name

• name1

• name@1

• n_a_m_e

Give 3 examples of reserved words that cannot be used for naming a variable.

Which of the following are correct representation of literals?

• print('123')

• print(Hello World)

• print(True)

Look at the following and choose the correct answers.

x = x + 10

• x is a literal

• x + 10 is an expression

• + is an operator

• 10 is a variable

Given the following statement, put bracket(s) at the right spot to get a result of 10.

result = 1 + 2 / 3 * 4 - 5 + 6 * 2

Which of the following data types are correctly matched to the values?

• int: 1

  float: '2.0'

  string: 'string'

  bool: True

• int: 1

  float: 2.0

  string: 'string'

  bool: true

• int: 1

  float: 2.0

  string: 'string'

  bool: False

• int: '1'

  float: 2.0

  string: 'string'

  bool: False

Can this statement, 5 + '1' be executed without errors?

• Yes

• No

Which statements below can run without any errors?

• 1 + 1.0

• 1 + True / False

• True + ‘1’

• 5 * ‘t’