Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1. Select the output for the following set of code : static void Main(string[] args) { int i = 0; if (i == 0) { goto label; } label: Console.WriteLine("HI..."); Console.ReadLine(); }

Hi"¦infinite times
Code runs prints nothing
Hi Hi
Hi"¦

Discuss Question

Answer: Option A. -> Hi"¦infinite times

for i = 0 ,if condition is satisfied as (i == 0).So,label statement is printed.
Output : Hi

Question 2. Select output for the following set of code :
static void Main(string[] args) { int i, s = 0, a = 1, d; i = Convert.ToInt32(Console.ReadLine()); do { d = i % (2 * 4); s = s + d * a; }while ((Convert.ToInt32(i = i / (2 * 4))) != 0 && (Convert.ToBoolean(Convert.ToInt32((a) = (a * 10))))); Console.WriteLine(s); Console.ReadLine(); }enter i = 342.

It finds binary equivalent of i
It finds octal equivalent of i
It finds sum of digits of i
It finds reverse of i

Discuss Question

Answer: Option B. -> It finds octal equivalent of i

None.
Output : i = 342.
s = 526.

Question 3. Select the output for the following set of code:
static void Main(string[] args) { int i, s = 0; for (i = 1; i <= 10; s = s + i, i++); { Console.WriteLine(s); } Console.ReadLine(); }

Code report error
Code runs in infinite loop condition
Code gives output as 0 1 3 6 10 15 21 28 36 45
Code give output as 55

Discuss Question

Answer: Option D. -> Code give output as 55

Since occurrence of termination symbol(;) at end of for loop.
Output: 55.

Question 4. Select the output for the following set of code :
static void Main(string[] args) { int i = 0, j = 0; l1: while (i < 2) { i++; while (j < 3) { Console.WriteLine("loop\n"); goto l1; } } Console.ReadLine(); }

loop is printed infinite times
loop
loop loop
Compile time error

Discuss Question

Answer: Option C. -> loop loop

Since outer while loop i.e while(i

Question 5. Correct syntax for do while loop is :

do; { statement; }while (condition);
do(condition) { statement; }while;
do { statement; }while (condition)
do { statement; }while (condition);

Discuss Question

Answer: Option D. -> do { statement; }while (condition);

By definition
Output:do
{
statement;
}while (condition);

Question 6. Which statement is correct among the mentioned statements?
1. The for loop works faster than a while loop2. for( ; ; )implements an infinite loop

Only 1 is correct
Only 2 is correct
Both 1 and 2 are correct
Both 1 and 2 are incorrect

Discuss Question

Answer: Option B. -> Only 2 is correct

Question 7. What is the output for the following code ?
static void Main(string[] args) { int a = 15, b = 10, c = 1; if (Convert.ToBoolean(a) && (b > c)) { Console.WriteLine("cquestionbank"); } else { break; } }

cquestionbank
It will print nothing
Compile time error
Run time error

Discuss Question

Answer: Option C. -> Compile time error

Keyword "break is not part of if-else statement.This keyword is used in case of loop or switch case statement.

Question 8. What is the output for the following code ?
static void Main(string[] args) { int a = 5; if (Convert.ToBoolean((.002f) -(0.1f))) Console.WriteLine("Sachin Tendulkar"); else if (a == 5) Console.WriteLine("Rahul Dravid"); else Console.WriteLine("Ms Dhoni"); Console.ReadLine(); }

Rahul Dravid
Sachin Tendulkar
Ms Dhoni
Warning : Unreachable Code

Discuss Question

Answer: Option B. -> Sachin Tendulkar

(0.002 “ 0.1f) not equivalent to zero hence it is true. So,only first if clause will execute and print:Sachin Tendulkar on console.As,first condition is always true so no else if statement will be executed. Output: Sachin Tendulkar

Question 9. Select the output for the following set of Code:
static void Main(string[] args) { int n, r; n = Convert.ToInt32(Console.ReadLine()); while (n > 0) { r = n % 10; n = n / 10; Console.WriteLine(+r); } Console.ReadLine(); } for n = 5432.

3245
2354
2345
5423

Discuss Question

Answer: Option C. -> 2345

Reverse of number using while loop.
Output: 2345.

Question 10. Select the output for the following set of code :
static void Main(string[] args) { int i = 9 , j = 7; switch (i - j + 3) { case 9: 7: j += 6; break; case 5: i -= 4; break; } Console.WriteLine(i + "\n" + j); Console.ReadLine(); }