Understanding Unary and Binary Operators for PCEP-30-02

Question 1: What is the result of the following code?

x = -5
print(+x)

1. -5
2. 5
3. 0
4. -1

Question 2: Which operator is a unary operator in the following list?

1. +
2. *
3. //
4. **

Question 3: What is the result of the following code?

y = 10
z = y ** 2
print(z)

1. 10
2. 20
3. 100
4. 1000

Question 4: Which of the following are valid binary operators in Python? (Select all that apply).

1. +
2. -
3. //
4. -(unary negation)

Question 5: What are the results of the following code? (Select all that apply)

a = 15
b = -a
c = a * -1

1. b is -15
2. b is 15
3. c is -15
4. c is 15

Question 6: Rearrange the following expressions to evaluate the sum of two numbers and negate the result: neg_sum = -sum, sum = 10 + 5.

Question 7: Rearrange the following steps to correctly compute and print the result of 10 * 2 ** 3: print(result), result = 10 * 2 ** 3.

Question 8: The operator used to increment a variable by 1 is the ______ operator.

Question 9: The operator used to negate a value is the ______ operator.

Question 10: Sort the following operations to correctly evaluate x = 5 and y = -x: print(y), y = -x, x = 5.

Question 11: Sort the following expressions in ascending order of their results: 10 // 3, -10 // 3, -10 % 3, 10 % 3.

Question 12: Fill in the missing code to correctly negate the value of z.

z = 7
result = ______ z

Question 13: Fill in the missing code to correctly compute the power of a to b.

a = 2
b = 3
result = a ______ b

Question 14: Insert the correct operator to divide c by d.

c = 18
d = 3
result = c ______ d

Question 15: Insert the correct operator to find the remainder of m divided by n.

m = 10
n = 4
result = m ______ n

Question 16: What is the result of the following code?

x = 4
y = -2
result = x * y
print(result)

• -8
• 8
• -6
• 6

Question 17: Which of the following is a binary operator?

1. ~
2. - (unary)
3. +
4. not

Question 18: Which of the following are valid unary operators in Python? (Select all that apply)

1. +
2. -
3. ~
4. *

Question 19: What are the results of the following code? (Select all that apply)

p = 4
q = -p
r = ~p

1. q is -4
2. q is 4
3. r is -5
4. r is 5

Question 20: Rearrange the following expressions to correctly compute x raised to the power of y and then negated: x = 2, result = x ** y, y = 3, result = -result.

Question 21: Rearrange the following steps to correctly compute and print the result of -8 // 3: print(result), result = -8 // 3.

Question 22: The operator used to invert all bits of a number is the ______ operator.

Question 23: The operator used to multiply two numbers is the ______ operator.

Question 24: Sort the following operations to correctly evaluate x = 7 and y = ~x: print(y), y = ~x, x = 7.

Question 25: Sort the following expressions in ascending order of their results: -10 // 3, 10 // -3, 10 % -3, -10 % 3.

Question 26: Fill in the missing code to correctly compute the floor division of a by b.

a = 9
b = 2
result = a ______ b

Question 27: Fill in the missing code to correctly invert all bits of n.

n = 5
result = ______ n

Question 28: Insert the correct operator to add d to e.

d = 7
e = 8
result = d ______ e

Question 29: Insert the correct operator to subtract q from r.

q = 3
r = 15
result = r ______ q

Question 30: What is the result of the following code?

a = 5
b = -a
result = b + a
print(result)

1. 0
2. 10
3. -10
4. 5
▼

Answer: a) 0

Explanation: The value of b is -5, and a is 5. Therefore, b + a equals 0.