C1S170 Week 3 Sample Quiz in C# – 35/35 marks

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Problem Statement

1. Question : (TCO 5) When writing a program, if you know exactly how many times statements in a loop should execute, use the _____ structure.

do while




2. Question : (TCO 5) When used within a loop structure, the _____ statement causes execution to jump out of the loop and proceed with subsequent statements in the program.





3. Question : (TCO 5) A _____ looping structure, such as WHILE, performs its conditional expression _____ its contents execute.

posttest, after

pretest, before

posttest, while

pretest, while

4. Question : (TCO 10) During a code walk-through, someone may suggest that this code be replaced with _____, as it is more efficient.

int val = 0;
while (val < 10) { Console.WriteLine(val); val++; } for(int val = 0; val < 10; val++) { Console.WriteLine(val); } for(int val = 0; val <= 10; val++) { Console.WriteLine(val); } for(int val = 0; val < 10; val--) { Console.WriteLine(val); } int val = 0; do while (val < 10) { Console.WriteLine(val); val++; } 5. Question : (TCO 5) A block of statements within the body of a FOR loop must be surrounded with _____. curly braces {} parentheses () square brackets [] None of the above 6. Question : (TCO 5) What output will this set of statements produce? int a = 1; while (a < 1) { Console.Write("{0}\t", a); a++; } Console.Write("{0}\t", a); An infinite loop An exception 1 1 1 7. Question : (TCO 5) In this code, the variable _____ is a counter and the variable _____ is an accumulator. double total = 0, weight = 2.0, limit =10, max = 50; int track = 0; for (int num = 0; num <= limit; num++ ) { total = total + weight * num; if (total <= max) track++; } num, track total, track track, total weight, limit 8. Question : (TCO 5) In this code, the inner FOR loop _____. int i = 1, j = 1; for (i = 1; i < 4; i++) { for (j = 1; j < 4; j++) { Console.Write("{0}{1} ", i, j); } } contains a syntax error is nested executes three times executes four times 9. Question : (TCO 5) Your program keeps asking for last names from the user until he/she enters “####.” In this context, the “####” is used as a(n) _____. accumulator counter sentinel value test value 10. Question : (TCO 10) Which of the following are best programming practices? Indenting the statements in the body of each control structure Nesting multiple repetition structures Including comments to describe its functionality Always using descriptive variable, method, and program names All of the above 11. Question : (TCO 5) Using a WHILE loop, write the C# code required to print every 2nd integer from 1 to 201 (i.e., 1, 3, 5, 7, etc.). Print each number on its own line.

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