Y7 FB Week 2022 - MicroBits and Coding

How many digits does the Denary counting system use?

• 1

• 2

• 10

• 16

Answer explanation

The digits are 0 to 9 = 10 digits in total

The individual switches inside a computer's brain (the CPU) can be set to how many different positions?

• 1

• 2

• 8

• 256

Answer explanation

Each switch can only have two positions - ON or OFF = 1 or 0

In Binary, what is the word "Bit" short for?

• Bit of data

• Binary Internal Target

• Binary Digit

• Base Integer Two

Answer explanation

A BIT is a single binary digit - either a one or a zero. There are 8 bits in a Byte. Half a byte, or four bits, is called a 'nibble'.

Convert the Binary number 1010 into Denary

(a)  

Answer explanation

The Binary place values are: 8 4 2 1 so 1010 = 8 + 0 + 2 + 0 = 10

Convert the Denary value 32 into Binary

(a)  

Answer explanation

The Binary place values up to 32 are: 32 16 8 4 2 1 so 32 = 1 0 0 0 0 0

Identify the variable in this code

• input

• "Enter the test score:"

• =

• score

In computing, what is a variable?

• Data that does not change when a program is run

• An insruction that makes the program do something

• Data that can be changed by a program when it is executed

• Data consisting of characters or punctuation marks

What is the computing term used to refer to the process of removing all unnecessary details from a problem, before trying to solve it?

• Decomposition

• Iteration

• Abstraction

• Algorithm

In computing, what is a Syntax Error?

• When the result of an calcualtion is too big for the computer to handle

• When the program does not follow the grammar of the programming language

• When the user enters the wrong TYPE of data

• When the program gives the wrong answer to a problem

Answer explanation

Too Big? OVERFLOW error

Wrong data type? TYPE error

Wrong result? LOGIC error or Run-time error... but computers usually give the correct result... but you might be asking the wrong question!

What is the computing term used to refer to describe instructions in a progrm that are repeated, often in a loop?

• Decomposition

• Iteration

• Abstraction

• Algorithm

Answer explanation

To iterate means to repeat something more than one.

Getting good exam results takes practice, or multiple iterations of practice tests!