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C MCQ Questions and Answers on Loops While For Do While 2

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C MCQ Questions and Answers

Learn C Programming MCQ Questions and Answers on Loops like While Loop, For Loop and Do While Loop. Loops execute a series of statements until a condition is met or satisfied. Easily attend exams after reading these Multiple Choice Questions.

Go through C Theory Notes on Loops before studying questions.



1) Choose facts about continue; statement is C Language.
A) continue; is used to take the execution control to next iteration or sequence
B) continue; statement causes the statements below it to skip for execution
C) continue; is usually accompanied by IF statement.
D) All the above.
Answer [=]
D
2) What is the output of C Program.? int main() { int a=14; while(a<20) { ++a; if(a>=16 && a<=18) { continue; } printf("%d ", a); } return 0; }
A) 15 16 17 18 19
B) 15 18 19
C) 15 16 20
D) 15 19 20
Answer [=]
D
Explanation:

Between 16 - 18, continue statement skips all other statements below it. So a will not be printed during that time.

15 printed

16 not printed

17 not printed

18 not printed

19 printed

20 printed

3) Choose a correct statement about C break; statement.?
A) break; statement can be used inside switch block
B) break; statement can be used with loops like for, while and do while.
C) break; statement causes only the same or inner loop where break; is present to quit suddenly.
D) All the above.
Answer [=]
D
4) Choose a correct statement about C language break; statement.
A) A single break; statement can force execution control to come out of only one loop.
B) A single break; statement can force execution control to come out of a maximum of two nested loops.
C) A single break; statement can force execution control to come out of a maximum of three nested loops.
D) None of the above.
Answer [=]
A
5) Choose a correct C Statement regarding for loop. for(; ;);
A) for loop works exactly first time
B) for loop works infinite number of times
C) Compiler error
D) None of the above
Answer [=]
B
Explanation:

We are not specifying condition to exit the loop. Eg. for(a=0;a<10;a++)

6) What is the output of C Program.? int main() { int a=10, b, c; b=a++; c=++a; printf("%d %d %d", a, b, c); return 0; }
A) 10 11 12
B) 12 10 12
C) 12 11 12
D) 12 12 12
Answer [=]
B
Explanation:

a++ first assigns 10 to b. Next a is incremented separately. ++a increments from 11 to 12. Final ++a value is assigned to the left side variable C.

7) What is the output of C Program.? int main() { int a=0, b=0; while(++a < 4) printf("%d ", a); while(b++ < 4) printf("%d ", b); return 0; }
A) 0 1 2 3 1 2 3 4
B) 1 2 3 1 2 3 4
C) 1 2 3 4 1 2 3 4
D) 1 2 3 4 0 1 2 3
Answer [=]
B
Explanation:

(++a < 4) first increments and compares afterwards. (b++ < 4) first compares and increments afterwards.

8) What is the output of C Program.? int main() { int a=10,b=20; if(a==9 AND b==20) { printf("Hurray.."); } if(a==10 OR b==21) { printf("Theatre"); } return 0; }
A) Theatre
B) Hurray Theatre
C) No output
D) Compiler error
Answer [=]
D
Explanation:

There are no keywords like AND / OR in C language. Logical OR is represented with two Pipes ||. Logical AND is represented with two Ampersands &&.

9) What are C ASCII character ranges.?
A) A to Z = 65 to 91
B) a to z = 97 to 122
C) 0 to 9 = 48 to 57
D) All the above
Answer [=]
D
Explanation:

All remaining characters are special characters or symbols in C Language. 0 to 47, 58 to 64, 91 to 96, 123 to 127.

10) Expand or Abbreviate ASCII with regard to C Language.
A) Australian Standard Code for Information Interchange
B) American Standard Code for Information Interchange
C) American Symbolic Code for Information Interchange
D) Australian Symbolic Code for Information Interchange
Answer [=]
B
Explanation:

There were only 128 Characters with 7 Bits in Original ASCII specification. Present character standard in all modern programming languages is UNICODE which covers all languages, Emojis and other special symbols all over the world.