Mettl Coding Skills 2

Question 1

What will the following Python code output?

x = [1, 2, 3, 4, 5]
print(x[1:4])

Accepted Answer

[2, 3, 4]

Answer

[1, 2, 3]

Answer

[2, 3, 4, 5]

Answer

[1, 2, 3, 4]

Question 2

What is the time complexity of binary search?

Accepted Answer

O(log n)

Answer

O(n)

Answer

O(n²)

Answer

O(n log n)

Question 3

Which SQL statement is used to retrieve unique values from a column?

Accepted Answer

SELECT DISTINCT

Answer

SELECT UNIQUE

Answer

SELECT DIFFERENT

Answer

SELECT SINGLE

Question 4

In object-oriented programming, what is 'encapsulation'?

Accepted Answer

Bundling data and methods into a single unit and restricting access

Answer

Inheriting properties from a parent class

Answer

A class having multiple forms

Answer

Breaking a problem into smaller functions

Question 5

What does the following pseudocode return for input n=5?

function factorial(n):
  if n == 0: return 1
  return n * factorial(n-1)

Accepted Answer

120

Answer

24

Answer

60

Answer

720

Question 6

What is the output of: print(type(3.14)) in Python?

Accepted Answer

Answer

Answer

Answer

What will the following Python code output?x = [1, 2, 3, 4, 5]print(x[1:4])