Data Types And Structures
Muhtasari
A program is only as good as the way it stores its data. Cram everything into the wrong shape, a whole class of exam scores squeezed into one string, or a student's details spread across five unrelated variables, and even a correct algorithm becomes painful to write and easy to break. Choosing the right data type and the right data structure is a design decision, not an afterthought.
This lesson covers Python's core data types, the three data structures named in the specification, records, one-dimensional arrays and two-dimensional arrays, how to manipulate strings, and the difference between local and global variables when writing subprograms. As throughout this subject, every example is written in Python, one of the three languages, alongside C# and Java, permitted for the Paper 2 practical exam.
Malengo
- Understand the need for, and understand how to use, data types (integer, real, Boolean, char, string)
- Understand the need for, and understand how to use, data structures (records, one-dimensional arrays, two-dimensional arrays)
- Understand the need for, and how to manipulate, strings
- Understand the need for, and how to use, variables and constants
- Understand the need for, and how to use, global and local variables when implementing subprograms
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Data Types And Structures. 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.
- Which Python type is the equivalent of the specification's 'char' data type? A) A list of one item B) A string of length 1 C) A single integer D) A Boolean Answer: B
- Which data structure groups several related fields, possibly of different types, under one name? A) A record B) A one-dimensional array C) A constant D) A two-dimensional array Answer: A
- In Python, grid[1][2] accesses which part of a two-dimensional array called grid? A) The first row, third column B) The second row, third column C) The third row, second column D) The whole second row Answer: B
- What keyword must be used inside a function to change the value of a variable defined outside every function? A) local B) const C) global D) static Answer: C
- A function receives a list as a parameter and appends a new item to it. What effect does this have on the original list in the calling code? A) No effect, lists are always copied B) The original list is also updated, since both refer to the same list C) A syntax error occurs D) Only the function's local copy is updated Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Data Types And Structures? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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