Control Structures and Iteration GPYC Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   Which code snippet uses pass correctly as a placeholder?

   • Aif x > 0: pass
   • Bif x > 0: break
   • Cif x > 0: return
   • Dif x > 0: continue
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2. 7foundation · easy

   What does the following code print? for i in range(3): print(i)

   • A0 1 2
   • B0 1 2 3
   • C1 2 3
   • D1 2
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4. 8foundation · easy

   Which nested loop structure correctly iterates over a 2D list (list of lists) and prints each element?

   • Afor i in range(len(matrix)): print(matrix[i])
   • Bfor i in matrix: for j in matrix: print(j)
   • Cfor row in matrix: for item in row: print(item)
   • Dfor item in matrix: print(item)
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5. 9foundation · easy

   What is the result of the following list comprehension? [x * 2 for x in range(4)]

   • A[0, 2, 4, 6]
   • B[0, 1, 2, 3]
   • C[2, 4, 6, 8]
   • D[0, 2, 4]
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6. 10foundation · medium

   Which statement correctly describes the behavior of the enumerate() and zip() functions in Python?

   • Aenumerate() and zip() both return dictionaries mapping indices to elements.
   • Benumerate() pairs each element with its index, while zip() combines elements from multiple iterables into tuples.
   • Cenumerate() returns a list of indices only, while zip() returns a list of elements from the first iterable only.
   • Denumerate() combines two iterables into tuples, while zip() adds an index to each element of a single iterable.
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