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How can the idea of precondtioning as part of 'Thinking Ahead' benefit a programmer when writing code?

'Thinking Ahead' is one of 5 main aspects of Computational Thinking. It is the planning of inputs, ouputs and preconditions that the program will adhear to. By 'Thinking Ahead' programmers can discover how t...
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Answered by Nathan H. • Computing tutor
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What is the decimal equivalent of the following sequence of bits, which represents an unsigned binary integer: 1101001. What is the decimal equivalent if the sequence in bits encodes a two’s complement binary integer.

1101001 Unsigned binary number means every bit represents a power of two. The sum of the powers present in the binary representation gives the number in decimal. We start from right to left: 1 2 0 +0 2 1 +0 ...
AP
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Taken from an AQA paper: A common misconception is that the Internet is the World Wide Web. Explain the differences between the Internet and the World Wide Web.

Using these terms interchangeably is a pet-hate of Sir Tim-Bernes-Lee, who invented the WWW and works at our university, so it seemed an appriate choice! The internet can be thought of as a massive network (...
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Answered by George G. • Computing tutor
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Why are bit patterns often displayed in hexadecimal notation instead of binary notation?

Hexadecimal notation is compact, compared to binary notation, hence easier to understand by humans.
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Answered by Artur K. • Computing tutor
8515 Views

How does the Stack data type work?

A Stack is an abstract data type (ADT), this means its a concept rather than an implementation. I will explain the Stack ADT using the idea of a pile of plates. The pile is the Stack. With a pile of plates y...
SO
Answered by Sam O. • Computing tutor
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