Arrays problems
- 1. Which of the following statements are correct about the C#.NET code snippet given below?
int[ , ] intMyArr = {{7, 1, 3}, {2, 9, 6}};- intMyArr represents rectangular array of 2 rows and 3 columns.
- intMyArr.GetUpperBound(1) will yield 2.
- intMyArr.Length will yield 24.
- intMyArr represents 1-D array of 5 integers.
- intMyArr.GetUpperBound(0) will yield 2.
Options- A. 1, 2
- B. 2, 3
- C. 2, 5
- D. 1, 4
- E. 3, 4 Discuss
Correct Answer: 1, 2
- 2. Which of the following statements is correct about the array declaration given below?
int[][][] intMyArr = new int[2][][];
Options- A. intMyArr refers to a 2-D jagged array containing 2 rows.
- B. intMyArr refers to a 2-D jagged array containing 3 rows.
- C. intMyArr refers to a 3-D jagged array containing 2 2-D jagged arrays.
- D. intMyArr refers to a 3-D jagged array containing three 2-D jagged arrays.
- E. intMyArr refers to a 3-D jagged array containing 2 2-D rectangular arrays. Discuss
Correct Answer: intMyArr refers to a 3-D jagged array containing 2 2-D jagged arrays.
- 3. How will you complete the foreach loop in the C#.NET code snippet given below such that it correctly prints all elements of the array a?
int[][]a = new int[2][]; a[0] = new int[4]{6, 1 ,4, 3}; a[1] = new int[3]{9, 2, 7}; foreach (int[ ] i in a) { /* Add loop here */ Console.Write(j + " "); Console.WriteLine(); }
Options- A. foreach (int j = 1; j < a(0).GetUpperBound; j++)
- B. foreach (int j = 1; j < a.GetUpperBound (0); j++)
- C. foreach (int j in a.Length)
- D. foreach (int j in i)
- E. foreach (int j in a.Length -1) Discuss
Correct Answer: foreach (int j in i)
- 4. Which of the following are the correct ways to define an array of 2 rows and 3 columns?
-
int[ , ] a; a = new int[2, 3]{{7, 1, 3},{2, 9, 6}}; -
int[ , ] a; a = new int[2, 3]{}; -
int[ , ] a = {{7, 1, 3}, {2, 9,6 }}; -
int[ , ] a; a = new int[1, 2];
-
int[ , ] a; a = new int[1, 2]{{7, 1, 3}, {2, 9, 6}};
-
Options- A. 1, 2 , 3
- B. 1, 3
- C. 2, 3
- D. 2, 4, 5
- E. 4, 5 Discuss
Correct Answer: 1, 3
- 5. Which of the following is the correct way to define and initialise an array of 4 integers?
-
int[] a = {25, 30, 40, 5}; -
int[] a; a = new int[3]; a[0] = 25; a[1] = 30; a[2] = 40; a[3] = 5;
-
int[] a; a = new int{25, 30, 40, 5}; -
int[] a; a = new int[4]{25, 30, 40, 5}; -
int[] a; a = new int[4]; a[0] = 25; a[1] = 30; a[2] = 40; a[3] = 5;
-
Options- A. 1, 2
- B. 3, 4
- C. 1, 4, 5
- D. 2, 4, 5
- E. 2, 5 Discuss
Correct Answer: 1, 4, 5
- 6. Which of the following is the correct output of the C#.NET code snippet given below?
int[ , , ] a = new int[ 3, 2, 3 ]; Console.WriteLine(a.Length);
Options- A. 20
- B. 4
- C. 18
- D. 10
- E. 5 Discuss
Correct Answer: 18
- 7. Which of the following statements are correct about the C#.NET code snippet given below?
int[][]intMyArr = new int[2][]; intMyArr[0] = new int[4]{6, 1, 4, 3}; intMyArr[1] = new int[3]{9, 2, 7};
Options- A. intMyArr is a reference to a 2-D jagged array.
- B. The two rows of the jagged array intMyArr are stored in adjacent memory locations.
- C. intMyArr[0] refers to the zeroth 1-D array and intMyArr[1] refers to the first 1-D array.
- D. intMyArr refers to intMyArr[0] and intMyArr[1].
- E. intMyArr refers to intMyArr[1] and intMyArr[2]. Discuss
Correct Answer: intMyArr[0] refers to the zeroth 1-D array and intMyArr[1] refers to the first 1-D array.
- 8. Which of the following statements is correct about the C#.NET code snippet given below?
int[] intMyArr = {11, 3, 5, 9, 4};
Options- A. intMyArr is a reference to an object of System.Array Class.
- B. intMyArr is a reference to an object of a class that the compiler derives from System.Array Class.
- C. intMyArr is a reference to an array of integers.
- D. intMyArr is a reference to an object created on the stack.
- E. intMyArr is a reference to the array created on the stack. Discuss
Correct Answer: intMyArr is a reference to an object of a class that the compiler derives from System.Array Class.
- 9. If a is an array of 5 integers then which of the following is the correct way to increase its size to 10 elements?
Options- A.
int[] a = new int[5]; int[] a = new int[10]; - B.
int[] a = int[5]; int[] a = int[10]; - C.
int[] a = new int[5]; a.Length = 10 ; - D.
int[] a = new int[5]; a = new int[10]; - E.
int[] a = new int[5]; a.GetUpperBound(10);
Discuss
Correct Answer:
int[] a = new int[5];
a = new int[10];- 10. Which one of the following statements is correct?
Options- A. Array elements can be of integer type only.
- B. The rank of an Array is the total number of elements it can contain.
- C. The length of an Array is the number of dimensions in the Array.
- D. The default value of numeric array elements is zero.
- E. The Array elements are guaranteed to be sorted. Discuss
Correct Answer: The default value of numeric array elements is zero.
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