Top answers

All subjects
All levels

In a computer program, a parameter may be passed to a procedure by value. Explain how this method works.

Parameters are variables sent to procedures so that the procedures are able to use them. There are two main ways of passing parameters, one of which is by value: Passing a parameter by value is where a co...

AQ
Answered by Aymen Q. Computing tutor
2325 Views

Explain the difference between lossless and lossy data compression techniques.

as the name implies , a lossless compression technique is designed so that the original file exactly as it was . maximum comparisson possible is about 50% . lossless algorithms use some sort of replacing ...

NP
Answered by Nikolas P. Computing tutor
5669 Views

Outline the differences between how a compiler and an interpreter works, and explain the advantages and usage of of each [12 marks]

Compilers work by translating all the program code into source code (machine code) first, which is then ran by the computer. Alternatively, an interpreter works by reading and translating each line of cod...

RP
Answered by Russell P. Computing tutor
4531 Views

The numbers 6B and 12 are displayed in hexadecimal form. Convert them into binary form and perform binary addition to find the sum. Convert your answer back into hexadecimal. Show your workings.

The first step is to work out what 6B and 12 are in binary. Starting with 6B, we need to find a four-bit representation of both 6 and B. 6, converts straight to its binary form, simply by adding 1s...

BC
Answered by Ben C. Computing tutor
3289 Views

Explain why it is important to check the email address with JavaScript and again when it reaches the server.

It is important to check the email address with JavaScript first on the client-side because it is quicker than the server and you don't need to refresh any pages (assuming AJAX is not used). Additionally,...

MB
Answered by Matthew B. Computing tutor
10035 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning