SLR 8 - Basic Programming Concepts - Part One

What is 'casting' when talking about data types?

• Creating a record that can hold multiple types of data.

• Fishing around for some lost data.

• Creating a new data type to hold a new form of data.

• Changing the type of stored data to a different format. e.g. string to integer

Why is important to use data types?

• Each data type uses the same amount of memory, so it doesn't really matter.

• Each data type uses a different amount of memory, specifying the data type makes the code more efficient.

• Each data type uses a different amount of memory, so using a string is always the most efficient.

• The computer cannot convert from one data type to another, so we must set it at the beginning.

Which of the following is the ALU (Arithmetic Logic Unit) responsible for? Pick all that are correct.

• Arithmetic operations

• Logical comparisons

• Runs the clock

• Binary shifts

Which of these is NOT an arithmetic operator?

• addition

  +

• multiplication

  *

• modulus

  MOD

  %

• Less than

  <

Select ALL the comparison operators.

• <=

• !=

• =

• >

The result of a Boolean expression is always...

• True

• 0

• False

• True or False

Which of these is NOT a Boolean operator?

• AND

• EQUAL

• NOT

• OR

A ________ is an identifier to store values in memory that can change whilst the program is running.

What are the advantages of using constants over variables?

Pick as many as you think are correct.

• Memory use is more efficient

• Code is easier to read

• Program will run faster

• Code is easier to understand

Why are meaningful identifier names important?

Pick all that are correct.

• So variables and constants make sense

• Names of subroutines tell the reader what that block of code is for

• They make the code easier to understand

• The code is easier to debug and maintain