Question 1 - Case Based MCQ Questions - Chapter 3 - Stacks

Here is the code for pop method in stack to print  a string in reverse order. But there is some missing  word. Answer the questions that follow to execute  the code successfully. 

def popstack (stack)__ #Line 1

  if isempty (stack): #Line 2 

  ______  #Line 3 

  ______  : #Line 4 

  top = len(stack) __ #Line 5 

  for a in range (top, –1, –1): 

  print stack__, #Line 7 

  return

Question 1 (i)

Which symbol is used to terminate the function popstack()? 

(A) ;   (B) :    (C) ,  (D) !

Answer:

In python, a colon (:) is used to mark the beginning of a function.

Checking all the options, we note that all give errors except one

So, the correct answer is (B)

Question 1(ii)

Fill the blank in line 3 

(A) return   (B) True    (C) False   (D) 0

Answer:

Question 1(iii)

Which variable or keyword will be best suited in fill  the blank in line 4? 

(A) elif   (B) for    (C) while   (D) else

Answer:

Question 1(iv)

Fill the blank in line 5 

(A) 0  (B) 1    (C) 2   (D) –1

Answer:

Question 1(v)

Which value will be used in line 7? 

(A) (A)   (B) [a]    (C) <a>   (D) {a}

Answer: