Programming Output Evaluation

Question 1

Multiple choice

int main() {
  float x = fun(2, 3);
  printf("%f", x);
}
int fun(int x, float y)  // Line 7
 {
    x = 20.9; //Line 9 
    return x; 
}

What will be the output of the above code?

20.99
20.00
No output
Error
20

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Answer

{mm ^_$\ge$ n, (^{_{$\exists $}}i)[m=i²]}

Answer

$val(j)=\Theta( n)$

Answer

T (n) = O($\sqrt n$) and T (n) = $\Omega$ (1)

Answer

learn prog

Answer

Hello will be printed infinite number of times.

Answer

Impossible

Answer

It will not compile.

Question 2

Multiple choice

Consider the C program shown below. #include <stdio.h> #define print(x) print f(”%d “, x) int x; void Q(int z) { z + = x; print (z); } void P(int *y) { int x = *y+2; Q(x); *y = x-1; Print (x); } Main (void) { x = 5; P (&x) Print (x); } The output of this program is

12 7 6
22 12 11
14 6 6
7 6 6

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Question 3

Multiple choice

In the following C program fragment, j, k, n and TwoLog_n are integer variables, and A is an array of integers. The variable n is initialized to an integer $\ge$3, and TwoLog_n is initialized to the value of 2 *$\lceil log_2(n) \rceil$
for (k = 3; k < = n; k++) A [k] = 0; for (k = 2; k < = TwoLog_n ; k++) for (j = k+1; j < = n ; j++) A[j] = A[j] || (j% k); for (j = 3; j < = n ; j++) if (!A[j]) print f(”%d ”,j); The set of numbers printed by this program fragment is

{mm ^_$\ge$ n, (^_$\ge$i)[m=i!] }
{mm ^{_{$\le $}} n, m is prime}
{ }

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Question 4

Multiple choice

Consider the following C-program fragment in which i, j and n are integer variables.
for( i = n, j = 0; i > 0; i /= 2, j +=i ); Let val ( j ) denote the value stored in the variable j after termination of the for loop. Which one of the following is true?

$val(j)=\Theta(\log n)$
$val(j)=\Theta (\sqrt{n})$
$val(j)=\Theta (n\log n)$

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Question 5

Multiple choice

Consider this C code to swap two integers and these five statements: the code.

S1: will generate a compilation error S2: may generate a segmentation fault at runtime depending on the arguments passed S3: correctly implements the swap procedure for all input pointers referring to integers stored in memory locations accessible to the process S4: implements the swap procedure correctly for some but not all valid input pointers S5: may add or subtract integers and pointers.

S1
S2 and S3
S2 and S4
S2 and S5

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Question 6

Multiple choice

Consider the following C code segment: int Is Prime (n) { int i, n; for (i = 2; i <= sqrt (n) ; i ++) if (n% i == 0) { print f (“ Not Prime n”); return 0; } return 1; } Let T (n) denote the number of times the for loop is executed by the program on input n. Which of the following is TRUE?

T (n) = O($\sqrt n$) and T (n) =$\Omega$($\sqrt n$)
T (n) = O(n) and T (n) = $\Omega$ ($\sqrt n$)
None of the above

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Question 7

Multiple choice

What will be the output of the above code?

String str1 = Lets learn programming in C#;
String str2;
str2 = str1.Substring(5,10);
Console.WriteLine(str2);

Error
learn pro
earn progr
earn prog

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Question 8

Multiple choice

What will be the output of the above code?

for(;;)
Console.Writeline(Hello);

Compilation Error
Hello will be printed only once.
Hello will not be printed even once.
Runtime error

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Question 9

Multiple choice

Can we do the following assignment?num[0] = num2[1]; where both the arrays are integer type?

Yes
No
Yes but some sort of type casting is required

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Question 10

Multiple choice

What will be the output of the following code?

class Demo {
 static void Main(string[] args) {
  int a = 3;
  Site(ref a);
  Console.WriteLine(The value of variable is + a);
 }
 public static void Site(ref int i) {
  ++i;
 }
}

3
4
5
Compilation error
It will compile, but there will be no output.

Reveal answer Fill a bubble to check yourself

Question 11

Multiple choice

Identify the output of the code:

class Site {
 static void Main(string[] args) {
  int a;
  Site(out a);
  Console.WriteLine("The value of variable is" + a);
 }
 public static void Site(out int i) {
  i = 4;
 }
}

3
4
0
Will not compile due to uninitialization
Will not compile due to error in out keyword syntax

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Question 12

Multiple choice

Identify the output of the code given below:

using System;
class Program {
static void Main(string[] args) {
    long[] numbers = {10.5, 3.52, 4.3456, 100.43, 3.4 };
    Console.Write(numbers[1]);
    Console.ReadLine();
   }
}

10.5
3.52
0
Null

Reveal answer Fill a bubble to check yourself

Question 13

Multiple choice

Predict the correct output of the code given below:

using System;
class Program {
 static void Main(string[] args) {
  Byte[] numbers = {
   10,
   20,
   30,
   40
  };
  Console.Write(numbers[1]);
  Console.ReadLine();
 }
}

10
20
30
0
Compilation error

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Question 14

Multiple choice

Identify the output of the code given below:

using System;
class Demo1 {
 public void X() {
  Console.WriteLine("2");
 }
}
class Demo2: Demo1 {
 public new void X() {
  Console.WriteLine("4");
 }
}
class Test {
 static void Main(string[] args) {
  Demo1 s = new Demo1();
  s.X();
  Demo1 a = new Demo2();
  a.X();
 }
}

2 2
2 4
4 4
Null
It will not compile.

Reveal answer Fill a bubble to check yourself

Question 15

Multiple choice

Identify the correct output of the code given below:

using System;
class welcome {
 static void Main(string[] args) {
  String s =  "Welcome";;
  Object s3 = s.Clone();
  Console.WriteLine( "" + s3);
 }
}

Compilation error due to invalid cast of Object to String.
Compilation error due to invalid cast of String to Object.
Welcome
Null
Exception is possible.

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Programming Output Evaluation

Programming Output Evaluation Questions