Units Of Information
Muhtasari
A phone camera fills a memory card, a film download stalls at ninety per cent, a spreadsheet refuses to attach to an email. Every one of those everyday frustrations is the same question asked in different clothing: how much room does this take up, and how much room is there? Answering it needs one unit that everything else is built from, and a set of names for the very large multiples of that unit that real files actually reach.
This lesson gives you both. You will learn what a bit is and why it is the smallest piece of information there can be, why bits are handled in groups of eight, and the four prefixes this specification examines: kilo, mega, giga and tera. You will also learn something that trips up a lot of candidates and quite a few adults: there are two rival definitions of a kilobyte in circulation, and OxfordAQA has told you in writing which one it will use in your exam.
Malengo
- Know that:
- a bit is the fundamental unit of information
- a byte is a group of 8 bits.
- Know that quantities of bytes can be described using prefixes.
- Know the names, symbols and corresponding values for the decimal prefixes:
- kilo, 1 kB is 1,000 bytes
- mega, 1 MB is 1,000 kilobytes
- giga, 1 GB is 1,000 megabytes
- tera, 1 TB is 1,000 gigabytes.
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Maelezo ya Somo
Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge
Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Units Of Information. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- How many bits are there in one byte? A. 2 B. 4 C. 8 D. 16 Answer: C
- On the 9210 specification, how many bytes are there in 1 kB? A. 8 B. 100 C. 1,000 D. 1,024 Answer: C
- Which of these quantities is the largest? A. 800 kB B. 0.9 MB C. 7,000,000 bits D. 950,000 bytes Answer: B
- A file is 6,000,000 bytes. What is this in megabytes? A. 0.6 MB B. 6 MB C. 60 MB D. 6,000 MB Answer: B
- How many different patterns can be stored in 5 bits? A. 5 B. 10 C. 25 D. 32 Answer: D
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Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Units Of Information? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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