Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1. What will be the output of given code snippet?
class program { public static void Main(string[] args) { try { throw new NullReferenceException("C"); Console.WriteLine("A"); } catch (ArithmeticException e) { Console.WriteLine("B"); } Console.ReadLine(); } }

A
B
Compile time error
Runtime error

Discuss Question

Answer: Option D. -> Runtime error

try block is throwing NullPointerException but the catch block is used to counter Arithmetic Exception. Hence NullPointerException occurs since no catch is there which can handle it, runtime error occurs.

Question 2. Which of these keywords must be used to monitor exceptions?

try
finally
throw
catch

Discuss Question

Answer: Option A. -> try

Question 3. What would be the output of following code snippet?
{ try { int a, b; b = 0; a = 5 / b; Console.WriteLine("A"); } catch(ArithmeticException e) { Console.WriteLine("B"); } finally { Console.WriteLine("C"); } Console.ReadLine(); }

A
B
B C
Run time error

Discuss Question

Answer: Option C. -> B C

finally keyword is used to execute before catch and try block is executed.
Output : B C

Question 4. Which of these keywords is not a part of exception handling?

try
finally
thrown
catch

Discuss Question

Answer: Option C. -> thrown

Exception handling is managed via 5 keywords “ try, catch, throws, throw and finally.

Question 5. What will be the output of the given code snippet?
class Program { public static void Main(string[] args) { try { int a = 1; int b = 10 / a; try { if (a == 1) a = a / a - a; if (a == 2) { int[] c = { 1 }; c[8] = 9; } } finally { Console.WriteLine("A"); } } catch (IndexOutOfRangeException e) { Console.WriteLine("B"); } Console.ReadLine(); } }

Discuss Question

Answer: Option A. -> A

Question 6. What would be the output of given code snippet?
class Program { static void Main(string[] args) { int i; int v = 40; int[] x = new int[5]; try { Console.WriteLine(" Enter the number: "); index = Convert.ToInt32(Console.ReadLine()); x[index] = v; } catch(Exception e) { Console.WriteLine("Exception occured"); } Console.WriteLine("Program executed"); } }

Exception occured
Program executed
Exception occured Program executed
Program executed Exception occured

Discuss Question

Answer: Option C. -> Exception occured Program executed

Question 7. Choose the correct statement among the following?

A property can be a static member whereas an indexer is always an instance member
A get accessor of a property corresponds to a method with no parameters whereas get accessor of an indexer corresponds to a method with the same formal parameters lists as the indexer
It is an error for indexer to declare a local variable with the same name as indexer parameters
All of the mentioned

Discuss Question

Answer: Option D. -> All of the mentioned

Question 8. Consider a class maths and we had a property called as sum.b is a reference to a maths object and we want the statement b.sum = 10 to fail.Which of the following is the correct solution to ensure this functionality?

Declare sum property with both get and set accessors
Declare sum property with only get accessor
Declare sum property with get, set and normal accessors
None of the mentioned

Discuss Question

Answer: Option C. -> Declare sum property with get, set and normal accessors

Question 9. Which of these keywords are used for the block to handle the exceptions generated by try block?

try
catch
throw
check

Discuss Question

Answer: Option B. -> catch

Question 10. Consider a class maths and we had a property called as sum.b which is the reference to a maths object and we want the statement Console.WriteLine(b.sum)to fail.Which among the following is the correct solution to ensure this functionality?