Question

_{15. Which one of the following two conditional statements is correct in determining if m falls outside a range of values, (m <= 0) or (m > n)? Circle one answer: (a) if(m <0||m >n) (b) if(m <= 0 && m >n) (c) if(0 <= m || m <n) (b) if (0 <= m && m <n) 16. The statement (or command or function) is used inside a loop to send control of the program to the last line of code inside a loop. 17. If there is a section of a program that needs to be executed repeatedly, it is best handled by putting it into a Control of the program can be transferred to the first line of code outside a loop by using a statement. 19. A loop that is executed repeatedly without ending is called a(n) loop. 20. In a typical for loop, for ( expression1; expression2; expression3 ) statement which expression is used to increment the counting variable? 21. Which of the following looping mechanisms evaluates the controlling expression before it executes the loop? Circle one while expression ) statement or do statement while ( expression );}

Answer 1

15.

a) if(m < 0 || m > n) implies m is less than 0 or greater than n

b) if(m <= 0 && m > n) implies m is less than equals to 0 and m is greater than n i.e. m does not lie within a range[0,n)

c) if(0 <= m || m < n) implies m is greater than equals to 0 or m is less than n

d) if(0 <= m && m < n) implies m is greater than equals to 0 and m is less than n i.e. m lies within a range of [0,n)

We want m to fall outside a range therefore option d suits the best as not(m <= 0 || m > n) = not(m <= 0) and not(m > n) by de Morgan's Law.

d is the correct choice

16) The goto statement is used inside a loop to send control of the program to the last line of the code inside a loop.

17) If there is a section of a program that needs to be executed repeatedly, it is best handled by putting it into a loop

18) Control of the program can be transferred to the first line of the code outside a loop by using a break statement.

19) A loop that is executed repeatedly without ending is called an infinite loop.

20) In a typical for loop expression3 is used to increment the counting variable.

for(int i = 0; i < n; i++) // example

21) While loop evaluates the controlling expression before it executes the loop.

Hope this helps you. Thank you :)