Question

Identify the error in the syntax of the following code:
def is_year(year):
if year % 4 == 0:
print('Year is divisible by 4')
else year % 4 != 0:
print('Year is not divisible by 4')
(1 point)
You cannot add a conditional statement after the else keyword.
There should be a double modulus to check for the remainder.
The print statements shall be ended with a semi-colon.
There should not be a colon after the function definition


How can we filter out numbers less than 2 in a number sequence to find prime numbers?(1 point)
We can test numbers less than 2 by checking if it is divisible by 2.
We can have a predefined list of all prime numbers and check if the given number is inside that list.
We can have a conditional check to filter out numbers less than 2.
Our code needs to throw an error if numbers less than 2 are given.



Consider a list [a, b, c, d]. Which element exists at index 4?(1 point)
There exists no element at index 4
the element a
the element b
the element d


Which of the following is the method of list traversal?(1 point)
if condition
for loop
if-else condition
if-else if-else condition


Which of the following data structures consists of a root node from which all the other elements can be
accessed?(1 point)
stack
map
tree
queue

Answer 1

Here's the breakdown of the questions and their correct answers:

1. **Identify the error in the syntax of the following code:**
```python
def is_year(year):
if year % 4 == 0:
print('Year is divisible by 4')
else year % 4 != 0:
print('Year is not divisible by 4')
```
- **Correct Answer:** You cannot add a conditional statement after the else keyword.
- **Explanation:** The `else` keyword should not have a condition; it should simply be `else:`.

2. **How can we filter out numbers less than 2 in a number sequence to find prime numbers?**
- **Correct Answer:** We can have a conditional check to filter out numbers less than 2.
- **Explanation:** Prime numbers are defined as being greater than 1, so a simple conditional check is enough to filter them.

3. **Consider a list [a, b, c, d]. Which element exists at index 4?**
- **Correct Answer:** There exists no element at index 4.
- **Explanation:** In Python (and most programming languages), indexing starts at 0. Therefore, a four-element list (`[a, b, c, d]`) has valid indices 0, 1, 2, and 3.

4. **Which of the following is the method of list traversal?**
- **Correct Answer:** for loop.
- **Explanation:** A `for loop` is commonly used to traverse through lists in programming.

5. **Which of the following data structures consists of a root node from which all the other elements can be accessed?**
- **Correct Answer:** tree.
- **Explanation:** A tree data structure has a root node, and other nodes are connected to it, forming a hierarchical structure.

If you have any further questions or need clarification, feel free to ask!