Programming problems
- 1. Can you suggest any other way of writing the following expression such that 30 is used only once? a <= 20 ? b = 30 : c = 30 ; Discuss
Correct Answer: *( ( a <= 20 ) ? &b : &c ) = 30;
- 2. What would be the output of the following program? main() { int i = -3, j =2, k =0, m ; m = ++j && ++i || ++k ; Printf ( "\n%d%d%d%d", i , j , k , m ); } Discuss
Correct Answer: -2 3 0 1
- 3. We want to round off x, a Float to an Int value. The correct way to do so would be
Options- A. Y = ( int ) ( x + 0.5 ) ;
- B. Y = int ( x + 0.5) ;
- C. Y = ( int ) x + 0.5;
- D. Y = ( int ) ( ( int ) x + 0.5 ) Discuss
Correct Answer: Y = ( int ) ( x + 0.5 ) ;
Explanation:
Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.
y = (int)(x + 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)
Example:
#include
int main ()
{
float x = 2.6;
int y = (int)(x + 0.5);
printf ("Result = %d\n", y );
return 0;
}
Result : 3
- 4. What would be the output of the following program? # define SQR(x) (x * x) main() { int a, b = 3; a = SQR ( b + 2 ); Printf ("\n %d ", a ); } Discuss
Correct Answer: 11 Because, on preprocessing the expression becomes a = ( 3 + 2 * 2 + 3), as Ist preference is multiply & then addition, it evalvates as(3+ 2 * 3 +2) = (3+6+2)=11
- 5. What is Autosys? Also asked in: Database Administrator, IT Trainer, Network Engineer
Correct Answer: AutoSys is an automated job control system for scheduling, monitoring, and reporting These jobs can reside on any AutoSys-configured machine that is attached to a network However, in real business, you need to fire jobs not just based on scheduled time, but also based on events (like an arrival of a file), and, based on the success or failure of other jobs Autosys is a total job scheduling solution that allows you to define these events, dependencies, time schedules, alerts, etc, making it a complete data center automation tool
- 6. Two main measures for the efficiency of an algorithm are
Options- A. Time and Space
- B. Complexity and Memory
- C. Data and Space
- D. Memory and Processor Also asked in: Database Administrator, IT Trainer
Correct Answer: Time and Space
Explanation:
Two main measures for the efficiency of an algorithm are Time and Space.
- 7. What is math.floor(3.6)?
Options- A. 6
- B. 3
- C. 3.5
- D. 0.6 Also asked in: Analyst, Database Administrator, IT Trainer
Correct Answer: 3
Explanation:
The Math.floor() function in JavaScript is used to round off the number passed as parameter to its nearest integer in Downward direction of rounding i.g towards the lesser value.
Hence, math.floor(3.6) = 3.
- 8. What is the output of this C code? #include
void main() { int x = 97; char y = x; printf("%cn", y); }
Options- A. a
- B. 97
- C. Run time error
- D. None Discuss
Correct Answer: a
- 9. Which of the following is true?
Options- A. It is appropriate to use assertions to validate arguments to methods marked public
- B. It is appropriate to catch and handle assertion errors
- C. It is NOT appropriate to use assertions to validate command-line arguments
- D. None Discuss
Correct Answer: It is NOT appropriate to use assertions to validate command-line arguments
Explanation:
A is incorrect. It is acceptable to use assertions to test the arguments of private methods.
B is incorrect. While assertion errors can be caught, Sun discourages you from doing so.
- 10. Methods declared as what cannot be overriden?
Options- A. Transcient
- B. Abstract
- C. Final
- D. Super Discuss
Correct Answer: Final
Explanation:
Once a method declared as Final cannot be overriden
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