Quiz 1

What is the output of the following code snippet? stack = [] stack.append(10) stack.append(20) print(stack.pop())

• 10

• 20

• None

• Error

What is the output of the following code snippet? q = [] q.append(1) q.append(2) q.pop(0) print(q)

• [1]

• [2]

• []

• Error

What is the output of the following code snippet? int arr[] = {1,2,3}; printf("%d", *(arr+1));

• 1

• 2

• 3

• Error

What will be the output of the following Java code snippet? Queue q = new LinkedList<>(); q.add(10); q.add(20); q.remove(); System.out.println(q.peek());

• 10

• 20

• null

• Error

What will be the output of the following Python function when f(2) is called? def f(n): if n==0: return 0 return n + f(n-1) print(f(2))

• 2

• 3

• 4

• 1

What will be the output of the following Python code snippet? graph = {1:[2,3]} print(len(graph[1]))

• 1

• 2

• 3

• Error

What is the output of the following Python code snippet? import heapq h=[] heapq.heappush(h,10) heapq.heappush(h,20) print(len(h))

• A. 1

• B. 2

• C. 0

• D. Error

What is the output of the following Java code snippet? Stack s = new Stack<>(); s.push(5); s.push(6); System.out.println(s.peek());

• A. 5

• B. 6

• C. null

• D. Error

What is the output of the following Python function when `f(3)` is called? def f(n): if n == 1: return 1 return n * f(n-1) print(f(3))

• A. 3

• B. 6

• C. 9

• D. 1

Output: q=[1,2,3] q.insert(0,0) print(q)

• [1,2,3,0]

• [0,1,2,3]

• [1,0,2,3]

• Error