Python and R Programming Practice MCQs

Question 1

In Python, how is the body of an if, for or while statement marked?

Accepted Answer

A. By indenting the lines that follow a header line ending in a colon

Answer

By indenting the lines that follow a header line ending in a colon

Answer

By enclosing the lines in curly braces placed after the condition

Answer

By placing the lines between begin and end keywords

Answer

By closing the block with an endif or endfor statement

Question 2

What does this code print?

```python
x = 10
x = "ten"
print(type(x))
```

Accepted Answer

B. <class 'str'>

Answer

Answer

Answer

TypeError, because x was first given an int

Answer

Question 3

What does print(-2

Accepted Answer

A. -4 512

Answer

-4 512

Answer

-4 64

Answer

4 64

Answer

4 512

Question 4

What does print(7 / 2, -7 // 2, -7 % 2) display?

Accepted Answer

C. 3.5 -4 1

Answer

3 -3 -1

Answer

3.5 -3 1

Answer

3.5 -4 1

Answer

3 -4 1

Question 5

What does this code print?

```python
x = 5
print(1 < x < 10, 1 < x > 6)
```

Accepted Answer

A. True False

Answer

True False

Answer

True True

Answer

False False

Answer

False True

Question 6

What does print("" or "Guest", 0 and 5) display?

Accepted Answer

D. Guest 0

Answer

True False

Answer

Guest False

Answer

True 0

Answer

Guest 0

Question 7

A program runs age = input("Age: ") and then print(age + 1). The user types 25. What happens?

Accepted Answer

C. It raises TypeError because age is a str

Answer

It prints 26

Answer

It prints 251

Answer

It raises TypeError because age is a str

Answer

It raises ValueError because 25 is not text

Question 8

What does print(int(-3.99), round(2.5)) display?

Accepted Answer

C. -3 2

Answer

-4 3

Answer

-4 2

Answer

-3 2

Answer

-3 3

Question 9

What does this code print?

```python
a = [1, 2]
b = a
b.append(3)
print(a, a is b)
```

Accepted Answer

D. [1, 2, 3] True

Answer

[1, 2] False

Answer

[1, 2] True

Answer

[1, 2, 3] False

Answer

[1, 2, 3] True

Question 10

What does print(type(2

Accepted Answer

A. <class 'int'> False

Answer

<class 'int'> False

Answer

<class 'float'> False

Answer

<class 'int'> True

Answer

An OverflowError is raised

Question 11

What does print(list(range(10, 0, -3))) display?

Accepted Answer

C. [10, 7, 4, 1]

Answer

[10, 7, 4, 1, -2]

Answer

[9, 6, 3]

Answer

[10, 7, 4, 1]

Answer

[10, 7, 4]

Question 12

What does this loop print?

```python
for n in range(1, 8):
    if n == 5:
        break
    if n % 2 == 0:
        continue
    print(n, end=" ")
```

Accepted Answer

B. 1 3

Answer

1 2 3 4

Answer

1 3

Answer

1 3 5 7

Answer

2 4

Question 13

What does this code print?

```python
for d in [3, 5, 7]:
    if d % 2 == 0:
        print("even")
        break
else:
    print("none")
```

Accepted Answer

D. none

Answer

even

Answer

Nothing is printed

Answer

even, then none

Answer

none

Question 14

While sketching a program, a developer writes if total < 0: but has not yet decided what to do in that case. Which statement keeps the block valid and does nothing?

Accepted Answer

A. pass

Answer

pass

Answer

continue

Answer

break

Answer

exit()

Question 15

Which of these values is truthy when used as an if condition?

Accepted Answer

C. "0"

Answer

0.0

Answer

[]

Answer

"0"

Answer

None

Python and R Programming Practice MCQs

Python and R Programming Free MCQs

In Python, how is the body of an if, for or while statement marked?

What does this code print? ```python x = 10 x = "ten" print(type(x)) ```

What does print(-2

What does print(7 / 2, -7 // 2, -7 % 2) display?

What does this code print? ```python x = 5 print(1 < x < 10, 1 < x > 6) ```

What does print("" or "Guest", 0 and 5) display?

A program runs age = input("Age: ") and then print(age + 1). The user types 25. What happens?

What does print(int(-3.99), round(2.5)) display?

What does this code print? ```python a = [1, 2] b = a b.append(3) print(a, a is b) ```

What does print(type(2

What does print(list(range(10, 0, -3))) display?

What does this loop print? ```python for n in range(1, 8): if n == 5: break if n % 2 == 0: continue print(n, end=" ") ```

What does this code print? ```python for d in [3, 5, 7]: if d % 2 == 0: print("even") break else: print("none") ```

While sketching a program, a developer writes if total < 0: but has not yet decided what to do in that case. Which statement keeps the block valid and does nothing?

Which of these values is truthy when used as an if condition?

What do these two lines print? ```python print("A", "B", sep="-", end="!") print("C") ```

In the lab program that prints factorials with while f < 2_000_000_000 (starting from 0! = 1 and multiplying f by n after each print), which line is printed last?

A nested loop compares each of 1,000 customer records with each of 500 product records. How many times does the inner loop body run?

What does this code print? ```python marks = 72 if marks >= 40: print("Pass") elif marks >= 60: print("First class") else: print("Fail") ```

A cleaning script calls int("3.5") on a value read from a CSV file. What happens?

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