Control Structures MCQ

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• The C code 'for(;;)' represents an infinite loop. It can be terminated by . . . . . . . .
  ক

  break

  খ

  exit(0)

  গ

  abort()

  ঘ

  terminate
• Comment on the output of the following C code.<br><pre><code class="c-program">#include &lt;stdio.h&gt;int main(){ int a = 1; switch (a) case 1: printf("%d", a); case 2: printf("%d", a); case 3: printf("%d", a); default: printf("%d", a);}</code></pre>
  ক

  No error, output is 1111

  খ

  No error, output is 1

  গ

  Compile time error, no break statements

  ঘ

  Compile time error, case label outside switch statement
• Which for loop has range of similar indexes of 'i' used in for (i = 0;i
  ক

  for (i = n; i&gt;0; i-)

  খ

  for (i = n; i &gt;= 0; i-)

  গ

  for (i = n-1; i&gt;0; i-)

  ঘ

  for (i = n-1; i&gt;-1; i-)
• What will be the correct syntax for running two variable for loop simultaneously?
  ক

  [ <p><span>A. for (i = 0; i for (j = 0; j <p><span>B. for (i = 0, j = 0; i

  খ

  for (i = 0; i for (j = 0; j

  গ

  none of the mentioned
• How many times while loop condition is tested in the following C code snippets, if i is initialized to 0 in both the cases?<br><pre><code class="c-program">while (i </code></pre>
  ক

  n, n

  খ

  n, n+1

  গ

  n+1, n

  ঘ

  n+1, n+1
• The C statement ""if (a == 1 || b == 2) {}"" can be re-written as . . . . . . . .
  ক

  if (a == 1)<br>if (b == 2){}

  খ

  if (a == 1){}<br>if (b == 2){}

  গ

  if (a == 1){}<br>else if (b == 2){}

  ঘ

  none of the mentioned
• How many times i value is checked in the following C code?<br><pre><code class="c-program">#include &lt;stdio.h&gt;int main(){ int i = 0; do { i++; printf("in while loop\n"); } while (i </code></pre>
  ক

  2

  খ

  3

  গ

  4

  ঘ

  1
• How many times i value is checked in the following C code?<br><pre><code class="c-program">#include &lt;stdio.h&gt;int main(){ int i = 0; while (i </code></pre>
  ক

  2

  খ

  3

  গ

  4

  ঘ

  1
• The keyword 'break' cannot be simply used within . . . . . . . .
  ক

  do-while

  খ

  if-else

  গ

  for

  ঘ

  while
• What will be printed if the following code is executed?<br><pre><code class="c-program">void main(){ int x=0; for( ; ; ) { if( x++ == 4 ) break; continue; } printf("x=%d", x);}</code></pre>
  ক

  x=0

  খ

  x=5

  গ

  x=4

  ঘ

  x=1

  ঙ

  Error
• Consider the following program fragment:<br><pre><code class="c-program">for(c=1, sum=0; c </code></pre>
  ক

  -5

  খ

  30

  গ

  10

  ঘ

  1

  ঙ

  15
• What will be the following code's output if choice = 'R'?<br><pre><code class="c-program">switch(choice){ case 'R' : printf("RED"); case 'W' : printf("WHITE"); case 'B' : printf("BLUE"); default : printf("ERROR");break;}</code></pre>
  ক

  RED

  খ

  RED WHITE BLUE ERROR

  গ

  RED ERROR

  ঘ

  RED WHITE BLUE

  ঙ

  ERROR
• What will be the final value of the digit?<br><pre><code class="c-program">void main(){ int digit = 0; for( ; digit </code></pre>
  ক

  -1

  খ

  17

  গ

  19

  ঘ

  16

  ঙ

  20
• What is the right choice, if the following loop is implemented?<br><pre><code class="c-program">void main(){ int num = 0; do{ --num; printf("%d", num); }while( ++num &gt;= 0 );}</code></pre>
  ক

  A run time error will be generated.

  খ

  The program will not enter into the loop.

  গ

  There will be a compilation error reported.

  ঘ

  The loop will run infinitely many times.

  ঙ

  Prints the value of 0 one time only.
• What will be the value of sum after the following program is executed?<br><pre><code class="c-program">void main(){ int sum=1, index = 9; do{ index = index – 1; sum *= 2; }while( index &gt; 9 );}</code></pre>
  ক

  1

  খ

  2

  গ

  9

  ঘ

  0.5

  ঙ

  0.25
• The type of the controlling expression of a switch statement cannot be of the type ........
  ক

  int

  খ

  char

  গ

  short

  ঘ

  float

  ঙ

  long
• What is the output of the following statements?<br><pre><code class="c-program">for(i=10; i++; i</code></pre>
  ক

  10 11 12 13 14

  খ

  10 11 12 13 14 15

  গ

  9 10 11 12 13

  ঘ

  Infinite loop

  ঙ

  None of these
• What will be the value of i and j after execution of following program?<br><pre><code class="c-program">#include&lt;stdio.h&gt;void main(){int i, j;for(i=0,j=0;i</code></pre>
  ক

  10 10

  খ

  10 20

  গ

  20 20

  ঘ

  Run time error
• What is the output of given program if user enter "xyz" ?<br><pre><code class="c-program">#include&lt;stdio.h&gt;void main(){float age, AgeInSeconds;int value;printf("Enter your age:");value=scanf("%f", &amp;age);if(value==0){printf("\\nYour age is not valid");}AgeInSeconds = 365 * 24 * 60 * 60 * age;printf("\\n You have lived for %f seconds", AgeInSeconds);}</code></pre>
  ক

  Enter your age : xyz Your age is not valid

  খ

  Enter your age: xyz You have lived for 0 seconds

  গ

  Enter your age: xyz Your age is not valid

  ঘ

  Complier error
• What is the output of given program if user enter "xyz" ?<br><pre><code class="c-program">#include&lt;stdio.h&gt;void main(){float age, AgeInSeconds;printf("Enter your age:");scanf("%f", &amp;age);AgeInSeconds = 365 * 24 * 60 * 60 * age;printf("You have lived for %f seconds", AgeInSeconds);}</code></pre>
  ক

  Enter your age: xyz You have lived for 0 seconds

  খ

  Enter your age: xyz You have lived for 0.00000 seconds

  গ

  Enter your age: xyz "after that program will stop"

  ঘ

  Run time error
• What is the output of given program if user enter value 99?<br><pre><code class="c-program">#include&lt;stdio.h&gt;void main(){int i;printf("Enter a number:");scanf("%d", &amp;i); // 99 is given as input.if(i%5 == 0){printf("nNumber entered is divisible by 5"); }}</code></pre>
  ক

  Enter a number:99

  খ

  Enter a number:99 Number is divisible by 5

  গ

  complier error

  ঘ

  Run time error
• What is the result of the expression 1 &amp;&amp; 1 in C?
  ক

  TRUE

  খ

  FALSE

  গ

  1

  ঘ

  0
• In C, which control structure allows you to define a block of code to be executed in response to a specific event or condition?
  ক

  for loop

  খ

  if statement

  গ

  switch case

  ঘ

  function
• What is the purpose of the 'return' statement in C?
  ক

  Terminate the program

  খ

  Exit a loop

  গ

  Return a value from a function

  ঘ

  Print a message
• Which control structure is used to execute a block of code only if a condition is true in C?
  ক

  for loop

  খ

  while loop

  গ

  if statement

  ঘ

  switch case
• What is the result of the expression !0 in C?
  ক

  TRUE

  খ

  FALSE

  গ

  1

  ঘ

  0
• What happens if a 'break' statement is used within a 'switch' statement in C?
  ক

  It skips the current case and continues to the next case

  খ

  It exits the 'switch' statement

  গ

  It generates a compilation error

  ঘ

  It generates a runtime error
• In C, which control structure is used to execute a block of code a specific number of times?
  ক

  for loop

  খ

  while loop

  গ

  if statement

  ঘ

  switch case
• What is the result of the expression `3 || 0` in C?
  ক

  TRUE

  খ

  FALSE

  গ

  1

  ঘ

  0
• What is the purpose of the 'switch' statement in C?
  ক

  Define a function

  খ

  Make a decision

  গ

  Create a loop

  ঘ

  Perform bitwise operations