System Design and Architecture

Question 1

You are given an array [2, 7, 11, 15] and a target 9. Which pair of indices will sum up to the target?

Accepted Answer

[0, 1]

Answer

[0, 2]

Answer

[1, 2]

Answer

[2, 3]

Question 2

Which of the following sorting algorithms has the best average-case time complexity?

Accepted Answer

Merge Sort

Answer

Bubble Sort

Answer

Quick Sort

Answer

Selection Sort

Question 3

Which type of SQL join returns all records from the left table and matching records from the right table?

Accepted Answer

LEFT JOIN

Answer

INNER JOIN

Answer

RIGHT JOIN

Answer

FULL OUTER JOIN

Question 4

What is the time complexity of traversing a singly linked list with n elements?

Accepted Answer

O(n)

Answer

O(1)

Answer

O(log n)

Answer

O(n²)

Question 5

Consider the following Python function:


def add_numbers(a, b):  
    return a + b  
print(add_numbers(2))

Accepted Answer

TypeError

Answer

ValueError

Answer

SyntaxError

Answer

IndexError