A program runs to completion with no error messages, but the total it prints is always lower than it should be. What type of error is this most likely to be?
Syntax error
Logic error
Runtime error
Overflow error
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Which statement is true of a syntax error?
It produces a wrong answer but lets the program run
It only appears while the program is running
It is detected before the program runs and prevents it from executing
It never affects whether the program runs
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A program asks the user to type a number and then uses it in a calculation. It works normally until a user types letters instead, at which point the program stops unexpectedly partway through. What type of error is this?
Overflow error
Syntax error
Logic error
Runtime error
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Which statement about overflow errors is correct?
An overflow error is a type of runtime error that occurs when a value exceeds the range that can be stored
An overflow error is a type of syntax error caught before the program runs
An overflow error happens when the code is missing a bracket
An overflow error occurs only in programs that have no comments
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A developer suspects a logic error inside a loop, so they step through the code on paper, writing down the value of each variable at every line. Which error-detection method is this?
Using a debugger
Hand tracing
Setting a breakpoint
Code attribution
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Confirming that a program's actual output matches the expected output for a given input is called:
Debugging
Validation
Verification
Attribution
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A program passes every test that uses typical values, but after release some users still hit errors. What is the most likely reason?
It was developed using an iterative process
It contains too many comments
Its variable names are unclear
It was not tested with boundary and extreme inputs
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An online store gives free shipping for orders of $25 or more. Which set of test inputs best checks the boundary where the free-shipping rule changes?
$24 and $25
$5 and $50
$10 and $40
$100 and $200
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Before processing, a program checks that a date the user enters is in the format DD/MM/YYYY and rejects anything that is not. This check is an example of:
Verification
Validation
Debugging
Iteration
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Consider the following code segment, which is intended to display each value in the list nums. What type of error, if any, occurs when the segment is executed?
nums ← [4, 8, 15]
i ← 1
REPEAT 4 TIMES
{
DISPLAY(nums[i])
i ← i + 1
}Syntax error, because the loop keyword is used incorrectly
Logic error, because the loop repeats one too many times but the program still finishes
No error occurs; the segment displays 4, 8, and 15
Runtime error, because the code tries to access a list element that does not exist
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A program reads a whole-number temperature and displays "Freezing" for values below 0, "Liquid" for values from 0 to 100 inclusive, and "Gas" for values above 100. Which set of test inputs is the most effective for checking that every output branch works correctly?
-1, 0, 100, 101
20, 40, 60, 80
50, 500
0, 50, 100
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