Chapter 4 Multiple choice questions Flashcards
A ______-controlled loop uses a true/false condition to control the number of times that it repeats.
a) Boolean
b) condition
c) decision
d) count
A condition-controlled loop uses a true/false condition. (while loop)
A ______-controlled loop repeats a specific number of times.
a) Boolean
b) condition
c) decision
d) count
A count-controlled loop uses a specific number. (for loop)
Each repetition of a loop is known as a(n) ______.
a) cycle
b) revolution
c) orbit
d) iteration
Each repetition of a loop is known as an iteration.
The while loop is a ______ type of loop.
a) pretest
b) no-test
c) prequalified
d) post-iterative
The while loop is a pretest type of loop.
A(n) ______ loop has no way of ending and repeats until the program is interrupted.
a) indeterminate
b) interminable
c) infinite
d) timeless
An infinite loop.
The -= operator is an example of a(n) ______ operator.
a) relational
b) augmented assignment
c) complex assignment
d) reverse assignment
-= is an augmented assignment operator.
A(n) ______ variable keeps a running total.
a) sentinel
b) sum
c) total
d) accumulator
An accumulator variable keeps a running total.
A(n) ______ is a special value that signals when there are no more items from a list of items to be processed. This value cannot be mistaken as an item from the list.
a) sentinel
b) flag
c) signal
d) accumulator
A sentinel is a special value that signals when there are no more items to be processed.
GIGO stands for ______.
a) great input, great output
b) garbage in, garbage out
c) GIGahertz Output
d) GIGabyte Operation
Garbage in, garbage out.
The integrity of a program’s output is only as good as the integrity of the program’s ______.
a) compiler
b) programming language
c) input
d) debugger
The integrity of a program’s output is only as good as the integrity of the program’s input.
The input operation that appears just before a validation loop is known as the ______.
a) prevalidation read
b) primordial read
c) initialization read
d) priming read
Priming read
Validation loops are known as ______.
a) error traps
b) doomsday loops
c) error avoidance loops
d) defensive loops
Validation loops are known as error traps.
True or False:
A condition-controlled loop always repeats a specific number of times.
False, a condition-controlled loop is controlled by conditions.
True or False:
The while loop is a preset loop.
True, a while loop is a preset.
True or False:
The following statement subtracts 1 from x: x = x -1
True, and it irks mathematicians to no end.
True or False:
It is not necessary to initialize accumulator variables.
False, it is necessary to initialize accumulator variables.
True or False:
In a nested loop, the inner loop goes through all of its iterations for every single iteration of the outer loop-
True, the inner loop goes through all of its iterations for every outer iteration.
True or False:
To calculate the total number of iterations of a nested loop, add the number of iterations of all the loops.
False, you need to multiply the number of iterations of all the loops.
True or False:
The process of input validation works as follows: when the user of a program enters invalid data, the program should ask the user “Are you sure you meant to enter that?”. If the user answers “yes,” the program should accept the data.
False, an error message should be displayed and the user should have to enter valid data.
