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Computers, Science, Instructional Technology
9th -
12thgrade
Boolean Expressions and If Statements, Iteration
61 questions
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- 1. Multiple Choice
Which of the following is NOT a relational operator?
<
?
==
>=
- 2. Multiple Choice
What does this Java expression evaluate to?
80 >= 80
"true"
true
false
This expression will error
- 3. Multiple Choice
true
false
Cannot be determined
- 4. Multiple Choice
What is the difference between == and =?
== is used for assignment, while = is used to check for equality.
= is used for assignment, while == is used to check for equality.
== assigns values to objects while = assigns values to primitives.
There is no difference. These symbols can be used interchangeably.
- 5. Multiple Choice
Which of the following symbols is the “not equal” symbol?
==
not =
!=
<>
- 6. Multiple Choice
Why do we use if statements in Java?
To break out of some block of code
To do something only if a condition is true
To do something while a condition is true
To repeat something for a fixed number of times
- 7. Multiple Choice
Which if statement is written properly?
if (boolean expression):
// code to execute
// code to execute
if boolean expression
{
// code to execute
// code to execute
}
if(boolean expression)
{
// code to execute
// code to execute
}
if boolean expression
[
// code to execute
// code to execute
]
- 8. Multiple Choice
What is the output of this program?
It is acidic!
It is basic!
It is neutral!
It is acidic!
It is basic!
It is neutral!
- 9. Multiple Choice
How old is the tree?
Still young!
How old is the tree?
Still young!
Pretty old!
How old is the tree?
Very old!
How old is the tree?
Still young!
Pretty old!
Very old!
- 10. Multiple Choice
How old is the tree?
Still young!
How old is the tree?
Pretty old!
Very old!
How old is the tree?
Very old!
How old is the tree?
Still young!
Pretty old!
Very old!
- 11. Multiple Choice
Which statement will be executed if x = 3 and y = 3?
Statement A
Statement B
Statement A and Statement B
Impossible to tell
- 12. Multiple Choice
Statement A
Statement B
Statement A and Statement B
Impossible to tell
- 13. Multiple Choice
- 14. Multiple Choice
lastName is longer than firstName
Karel is longer than The Dog
The Dog is longer than Karel
Karel is longer than The Dog
The Dog is longer than Karel
- 15. Multiple Choice
Which of the following statements is true?
There can only be one else-if statement in an if-else if statement.
An if- else if statement must always have an else clause.
An if- else if statement cannot have an else clause.
An if- else if statement must always start with an if statement.
- 16. Multiple Choice
Tamale it is!
Quesadilla it is!
That is not a combo of ours
Tamale it is!
Quesadilla it is!
- 17. Multiple Choice
Too expensive!
Typical
Typical
Must be a scam
Typical
Great deal
- 18. Multiple Choice
C, A, D, B
D, A, C, B
C, D, A, B
A, B, C, D
- 19. Multiple Choice
Which of the below is a logical operator?
!
##
**
%
- 20. Multiple Choice
What does this Java expression evaluate to?
true && !false
true
false
- 21. Multiple Choice
Yes
No
- 22. Multiple Choice
Yes
No
- 23. Multiple Choice
What value of x would make this boolean expression evaluate to false?
(x < 10) && (x != 5)
Any value less than 10
Any value less than 10 except for 5
The only time it is false is when x = 5.
Any value greater than or equal to 10
- 24. Multiple Choice
Which of the following logical statements is equivalent to
!(A && B)
!A && B
!A && !B
!A || !B
!A || B
- 25. Multiple Choice
Which of the following logical statements is equivalent to
!(A || B)
!A && !B
!A || !B
!A || B
A && B
- 26. Multiple Choice
What boolean value is held in the following boolean variable if hasBike is true and hasHelmet is false?
boolean cannotBike = !(hasBike && hasHelmet);
True
False
- 27. Multiple Choice
What boolean value is held in the following boolean variable if hasHeadlight is true and hasBikelight is false?
boolean cannotNightBike = !(hasHeadlight || hasBikelight);
True
False
- 28. Multiple Choice
true
false
- 29. Multiple Choice
true
false
- 30. Multiple Choice
What is the proper way to compare String values in Java?
The == operator
The .equals() String method
The = operator
The | operator
- 31. Multiple Choice
str1 == str2 && str1 == str3
str1 != str2 && str1.equals(str3)
str1 == str2 && str1.equals(str3)
None of the above will evaluate to true after this code snippet executes.
- 32. Multiple Choice
Reference equality uses the equality operator (==) and compares the references (addresses in memory) of two objects.
true
false
- 33. Multiple Choice
Logical equality compares the data of the objects.
False
True
- 34. Multiple Choice
Why do we use while loops in Java?
To break out of some block of code
To do something if a condition is true
To repeat some code while a condition is true
To repeat something for a fixed number of times
- 35. Multiple Choice
Print Hello one time
Print Hello in an infinite loop
Print Hello until program receives user input
Nothing
- 36. Multiple Choice
Which statement can we use inside of a loop to end it?
System.out.println;
break;
SENTINEL;
else;
- 37. Multiple Choice
The loop doesn’t ever change the value of x in the loop, so it never ends.
The conditional with the while will never be true, so actually the code will never execute.
There’s no break statement to end the code.
The code cannot contain just a print statement.
- 38. Multiple Choice
You can add x-- after the print statement.
You can add x = -1 after the print statement.
You can add x++ after the print statement.
Both A and B above.
- 39. Multiple Choice
4 3 2 1
-4 -3 -2 -1 0
-3 -2 -1 0
3 2 1 0
- 40. Multiple Choice
10 times
9 times
1 time
0 times
- 41. Multiple Choice
A
B
C
D
- 42. Multiple Choice
(n + 1) / 2
n / 2
(n - 1) / 2
n
n-1
- 43. Multiple Choice
Why do we use for loops in Java?
To break out of some block of code
To do something if a condition is true
To do something while a condition is true
To repeat something for a fixed number of times
- 44. Multiple Choice
2, 3, 4, 5, 6, 7, 8, 9,
2, 3, 4, 5, 6, 7, 8,
0, 1, 2, 3, 4, 5, 6, 7, 8,
This code will produce an infinite loop.
- 45. Multiple Choice
Which of the following will execute without throwing an exception error?
None of the above
A and B above.
- 46. Multiple Choice
Frog
orF
ogroF
ogroFr
StringIndexOutOfBoundsException
- 47. Multiple Choice
0
1
2
-1
5
- 48. Multiple Choice
A. It may return a string that is equal to str2.
B. It may return a string that has no characters in common with str2.
C. It may return a string that is equal to str1.
Both A and C are true
None of these choices will be true.
- 49. Multiple Choice
What is the general formula for traversing a String character by character?
- 50. Multiple Choice
A rectangle of 6 rows with 4 stars per row.
A rectangle of 6 rows with 3 stars per row.
A rectangle of 5 rows with 4 stars per row.
A rectangle of 4 rows with 5 stars per row.
- 51. Multiple Choice
5 stars
10 stars
15 stars
50 stars
500 stars
- 52. Multiple Choice
- 53. Multiple Choice
0 6 12 18 24
0 3 6 9 12 15 18 21 24
0 2 4 6 8 10 12 14 16 18 20 22 24
This produces an infinite loop
- 54. Multiple Choice
How often is the inner loop of a nested loop run?
Infinitely
Twice as often as the outer loop
Each time the outer loop runs
One less time than the outer loop runs
- 55. Multiple Choice
count < 5 is always true at point 1
count < 5 always false at point 1
count < 5 is sometimes true/sometimes false at point 1
- 56. Multiple Choice
count < 5 is always true at point 2
count < 5 always false at point 2
count < 5 is sometimes true/sometimes false at point 2
- 57. Multiple Choice
count < 5 is always true at point 3
count < 5 always false at point 3
count < 5 is sometimes true/sometimes false at point 2
- 58. Multiple Choice
x times
x + 1 times
x - 1 times
Infinite number of times
The condition is never true so this loop never executes.
- 59. Multiple Choice
x times
x + 1 times
x - 1 times
Infinite number of times
The condition is never true so this loop never executes.
- 60. Multiple Choice
x times
x - 1 times
x - 5 times
Infinite number of times
The condition is never true so this loop never executes.
- 61. Multiple Choice
Why is having efficient algorithms important?
It reduces the cost of running a program.
It can improve the speed that programs operate.
It increases the speed of innovations.
Both 1 and 2.
Both 2 and 3.
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