Which of the following best describes an API (Application Programming Interface)?
A set of rules and specifications describing how a library's procedures can be used
A program that translates pseudocode into machine code
A physical device that stores a library of programs
A list of every line of source code inside a library
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Consider the following code segment.
n ← RANDOM(1, 4)
DISPLAY(n * 2)Which of the following is a value that could NOT be displayed?
2
6
7
8
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A programmer includes an existing library of pre-written procedures in their program instead of writing those procedures from scratch.
Which of the following is a benefit of using the library?
The programmer can reuse tested code, which reduces development time and the chance of errors
The program is guaranteed to run faster than any code written by hand
The programmer no longer needs to test any part of their own program
The library removes the need to understand what any of its procedures do
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A programmer wants to use a procedure from a mapping library. They read the library's API documentation but never look at the procedure's source code.
Why is the programmer still able to use the procedure correctly?
Source code cannot be viewed once a library has been imported into a program
The API describes the procedure's name, parameters, and return value, so the programmer knows how to use it without seeing its internal code
A library does not contain any source code, only documentation
The programmer must copy the source code into their own program before it will run
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Consider the following code segment.
value ← RANDOM(3, 8)
DISPLAY(value)How many different values could be displayed?
5
8
6
3
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Consider the following code segment.
x ← RANDOM(2, 6)
DISPLAY(x * 3)Which of the following describes all the values that could be displayed?
All integers from 6 to 18
All integers from 2 to 6
The multiples of 3 from 2 to 6
The multiples of 3 from 6 to 18
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Consider the following code segment.
total ← RANDOM(1, 5) + 20
DISPLAY(total)What is the largest value that could be displayed?
25
26
24
21
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Consider the following code segment.
count ← 0
REPEAT 4 TIMES
{
n ← RANDOM(1, 2)
IF(n = 2)
{
count ← count + 1
}
}
DISPLAY(count)Which of the following is a value that could NOT be displayed?
0
5
2
4
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