APCSP Boolean Logic 2

Question 1

Given x = 5, which Boolean condition evaluates to TRUE?

Accepted Answer

x > 3 AND x < 10

Answer

x > 10 AND x < 3

Answer

x = 3 OR x = 4

Answer

NOT(x = 5)

Question 2

What does the expression NOT(TRUE AND FALSE) evaluate to?

Accepted Answer

TRUE

Answer

FALSE

Answer

UNDEFINED

Answer

NULL

Question 3

A login system uses the condition (username_correct AND password_correct). When does the user gain access?

Accepted Answer

When both username and password are correct

Answer

When only the username is correct

Answer

When only the password is correct

Answer

When either credential is correct

Question 4

Which Boolean expression is equivalent to NOT(A OR B) according to De Morgan's law?

Accepted Answer

NOT(A) AND NOT(B)

Answer

A AND B

Answer

NOT(A) OR NOT(B)

Answer

A OR B

Question 5

The condition (x > 0 OR y > 0) is TRUE when:

Accepted Answer

At least one of x or y is positive

Answer

Both x and y are negative

Answer

x equals y

Answer

Neither x nor y is zero

Question 6

A security system uses the condition (door_locked AND alarm_on). What happens to the condition when the door is unlocked?

Accepted Answer

The overall condition becomes FALSE

Answer

The overall condition is still TRUE

Answer

The alarm_on value determines the outcome

Answer

The condition becomes undefined

Question 7

Which Boolean expression is TRUE only when n is between 1 and 10 inclusive?

Accepted Answer

n >= 1 AND n <= 10

Answer

n > 1 AND n < 10

Answer

n >= 1 OR n <= 10

Answer

NOT(n < 1) OR NOT(n > 10)