DSA Revison: If-Else, Loops and Functions

# Revision --- title: Quiz 1 description: Quiz 1 duration: 60 card_type: quiz_card --- # Question **1.** Which of the following is NOT a boolean expression? # Choices - [ ] true - [ ] 4 == 5 - [ ] 4 + 5 - [ ] 4 < 5 - [ ] false --- title: Quiz 2 description: Quiz 2 duration: 60 card_type: quiz_card --- # Question **2.** Predict the output: ``` if(5 > 10) { System.out.println("First if"); } if(10 >= 16) { System.out.println("Second if"); } System.out.println("Oops!! Nothing will get printed.."); ``` # Choices - [ ] First if - [ ] Second if - [ ] First if Second if Oops!! Nothing will get printed.. - [ ] Oops!! Nothing will get printed.. --- title: Quiz 3 description: Quiz 3 duration: 60 card_type: quiz_card --- # Question **3.** Predict the output: ``` if(false){ System.out.println("Line 1"); } else { System.out.println("Line 2"); } ``` # Choices - [ ] Line 1 - [ ] Line 2 - [ ] Line 1 Line 2 - [ ] Error --- title: Quiz 4 description: Quiz 4 duration: 60 card_type: quiz_card --- # Question **4.** Predict the output: For input: 45 45 ``` Scanner sc = new Scanner(System.in); int a = sc.nextInt(); int b = sc.nextInt(); if(a > b){ System.out.print(a); } else{ System.out.print(b); } ``` # Choices - [ ] Error - [ ] 45 45 - [ ] 45 --- title: Quiz 5 description: Quiz 5 duration: 60 card_type: quiz_card --- # Question **5.** What will be the output of the following: ``` if(true) { System.out.println("1"); } else if(true) { System.out.println("2"); } else if(true) { System.out.println("3"); } ``` # Choices - [ ] 1 - [ ] 1 2 3 - [ ] 2 - [ ] 3 --- title: Quiz 6 description: Quiz 6 duration: 60 card_type: quiz_card --- # Question **6.** What will be the output of the following code? ```java int a = 10,b = 10; if(a >= 10 && b >= 10){ System.out.print(a+b); } ``` # Choices - [ ] 10 - [ ] 20 - [ ] 30 - [ ] None --- title: Quiz 7 description: Quiz 7 duration: 60 card_type: quiz_card --- # Question **7.** What will be the output of the following code? ```java int a = 10; int b = 10; if( ++a >= 12 && ++b >= 12 ){ System.out.println("Hello"); } System.out.println(a + b); ``` # Choices - [ ] Hello 10 - [ ] 22 - [ ] 21 - [ ] None --- title: Quiz 8 description: Quiz 8 duration: 60 card_type: quiz_card --- # Question **8.** What will be the output of the following code? ```java int a = 10; int b = 10; if( ++a >= 12 || ++b >= 12 ){ System.out.println("Hello"); } System.out.println(a + b); ``` # Choices - [ ] 20 - [ ] 21 - [ ] 22 - [ ] None --- title: Quiz 9 description: Quiz 9 duration: 60 card_type: quiz_card --- # Question **9.** What will be the output of the following code? ```java int N = 5; if(N > 2) System.out.println("Yayay"); System.out.println("Hmmmm"); else System.out.println("Blahblah!!"); System.out.println("Blahblah!!"); ``` # Choices - [ ] Error - [ ] No Error, this code works! - [ ] Yayay Hmmmm - [ ] Blahblah!! Blahblah!! --- title: Quiz 10 description: Quiz 10 duration: 60 card_type: quiz_card --- # Question **10.** What will be the output of the following code? ```java int marks = 80; if(marks > 70) { System.out.print("Distinction "); System.out.print("Congrats "); } else if(marks > 35) { System.out.print("Pass "); } else System.out.print("Fail "); System.out.print("Good luck"); ``` # Choices - [ ] Distinction Congrats Good luck - [ ] Good luck - [ ] Error - [ ] Distinction Congrats --- title: Quiz 11 description: Quiz 11 duration: 60 card_type: quiz_card --- # Question **11.** Predict the output of the following code? ```java int a = 10, b = 15; if(a > 8) { if(a < b || b == 9) { System.out.println("Hi"); } else { System.out.println("Bye"); } } else { System.out.println("Good Bye"); } ``` # Choices - [ ] Hi - [ ] Bye - [ ] Good Bye - [ ] None --- title: Quiz 12 description: Quiz 12 duration: 60 card_type: quiz_card --- # Question **12.** Predict the output of the following code? ```java if(true) { if(true) { if(false) { System.out.println("Hey there"); } } else { System.out.println("Hello"); } } else { System.out.println(10 / 0); } ``` # Choices - [ ] Hey there - [ ] Hello - [ ] No output - [ ] Error --- title: Quiz 13 description: Quiz 13 duration: 60 card_type: quiz_card --- # Question **13.** Predict the output of the following code: ```java if(true){ int x = 10; SOPln("Value of x is " + x); x ++ ; } SOPln("Value of x is " + x); ``` # Choices - [ ] Value of x is 10 Value of x is 11 - [ ] Value of x is 10 Value of x is 0 - [ ] Value of x is 10 Value of x is 10 - [ ] Error --- title: Quiz 14 description: Quiz 14 duration: 60 card_type: quiz_card --- # Question **14.** Predict the output of the following code: ```java int a = 10, b = 5; if(true){ int c = a * b; } SOPln(c); ``` # Choices - [ ] 50 - [ ] Error - [ ] Need Coffee!! --- title: Quiz 15 description: Quiz 15 duration: 60 card_type: quiz_card --- # Question **15.** What is the output of the following code? ``` int i = 0; while(i <= 10){ System.out.print(i + " "); i++; } ``` # Choices - [ ] 0 1 2 3 4 5 6 7 8 9 10 - [ ] 1 2 3 4 5 6 7 8 9 10 - [ ] Error --- title: Quiz 16 description: Quiz 16 duration: 60 card_type: quiz_card --- # Question **16.** What is the output of the following code? ``` int i = 1; while(i <= 10){ System.out.print(i + " "); } ``` # Choices - [ ] 1 2 3 4 5 6 7 8 9 10 - [ ] 1 1 1 1 1 1 ... loop never stops [infinite loop] --- title: Quiz 17 description: Quiz 17 duration: 60 card_type: quiz_card --- # Question **17.** How many times `Hi` will be printed in the output? ``` int i = 0; while(i <= 5){ System.out.println("Hi"); i = i + 1; } ``` # Choices - [ ] 5 - [ ] 6 - [ ] 4 - [ ] Infinite times --- title: Quiz 18 description: Quiz 18 duration: 60 card_type: quiz_card --- --- title: Quiz 18 description: Quiz 18 duration: 60 card_type: quiz_card --- # Question **18.** What will be the total number of iterations in the following code? ``` int i = 3; while(i <= n){ System.out.println(i); i = i + 3; } ``` # Choices - [ ] n / 3 - [ ] 3 * n - [ ] n+3 - [ ] n --- title: Quiz 19 description: Quiz 19 duration: 60 card_type: quiz_card --- # Question **19.** Predict the output: ``` int i = 10; while(i >= 0){ System.out.print(i + " "); i = i - 2; } ``` # Choices - [ ] 10 9 8 7 6 5 4 3 2 1 0 - [ ] 10 8 6 4 2 - [ ] 10 8 6 4 2 0 - [ ] 0 2 4 6 8 10 --- title: Quiz 20 description: Quiz 20 duration: 60 card_type: quiz_card --- # Question **20.** What is the output of the following code? ``` for(int i = 1; i >= 10; i++){ System.out.print(i + " "); } ``` # Choices - [ ] Error - [ ] 1 2 3 4 5 6 7 8 9 10 - [ ] Nothing will get printed - [ ] 10 9 8 7 6 5 4 3 2 1 --- title: Quiz 21 description: Quiz 21 duration: 60 card_type: quiz_card --- # Question **21.** What is the output of the following code? ``` for(int i = 1; i <= 5; i=i-1){ System.out.print(i + " "); } ``` # Choices - [ ] 1 2 3 4 5 - [ ] 5 4 3 2 1 - [ ] Infinite loop --- title: Quiz 22 description: Quiz 22 duration: 60 card_type: quiz_card --- # Question **22.** What does the following code do : ``` int ans = 0; for(int i = n; i > 0; i = i / 10) { ans += 1; } SOPln(ans); ``` - [ ] counts the number of digits - [ ] removes the last digit - [ ] prints the last digit - [ ] does nothing --- title: Quiz 23 description: Quiz 23 duration: 60 card_type: quiz_card --- # Question **23.** What is the expected output for **N = 4**? **Code** ``` for (int i = 1; i <= N; i++) { for (int i = 1; i <= N; i++) { SOP(" * "); } SOPln(); } ``` - [ ] \*\*\*\* - [ ] \* \*\* \*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\*\* \*\*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\* \*\* \* --- title: Quiz 24 description: Quiz 24 duration: 60 card_type: quiz_card --- # Question **24.** What is the expected output for **N = 4**? **Code** ``` public static void main() { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); for (int i = 1; i <= n; i++) { System.out.print(" * "); } } ``` - [ ] \*\*\*\* - [ ] \* \*\* \*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\*\* \*\*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\* \*\* \* --- title: Quiz 25 description: Quiz 25 duration: 60 card_type: quiz_card --- # Question **25.** What is the expected output for **N = 4**? **Code** ``` for (int i = 1; i <= N; i++) { for (int j = 1; j <= i; j++) { SOP(" * "); } SOPln(); } ``` - [ ] \*\*\*\* - [ ] \* \*\* \*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\*\* \*\*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\* \*\* \* --- title: Quiz 26 description: Quiz 26 duration: 60 card_type: quiz_card --- # Question **26.** What is the expected output for **N = 4**? **Code** ``` for (int i = 1; i <= N; i++) { for (int j = 1; j <= N - i + 1; j++) { SOP(" * "); } SOPln(); } ``` - [ ] \*\*\*\* - [ ] \* \*\* \*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\*\* \*\*\*\* \*\*\*\* - [ ] \*\*\*\* \*\*\* \*\* \* --- title: Quiz 27 description: Quiz 27 duration: 60 card_type: quiz_card --- # Question **27.** What is the output of the following code? ``` static int sum(int a, int b){ return a + b; } public static void main(String args[]){ System.out.println(sum(5,10)); } ``` # Choices - [ ] Error - [ ] 15 - [ ] No output --- title: Quiz 28 description: Quiz 28 duration: 60 card_type: quiz_card --- # Question **28.** What is the output of the following code? ```java static void sum(int a, int b){ return a + b; } public static void main(String args[]){ System.out.println(sum(5,10)); } ``` # Choices - [ ] Error - [ ] 15 - [ ] No output --- title: Quiz 29 description: Quiz 29 duration: 60 card_type: quiz_card --- # Question **29.** What is the output of the following code? ``` static int square(int a){ return a * a; } public static void main(String args[]){ System.out.println(square( - 6 )); } ``` # Choices - [ ] -36 - [ ] 36 - [ ] 6 - [ ] Error --- title: Quiz 30 description: Quiz 30 duration: 60 card_type: quiz_card --- # Question **30.** What is the output of the following code? ``` public static int square(int x){ return x * x; } public static int add(int x, int y){ return x + y; } public static void main(String args[]){ int n1 = square(3); System.out.println(add(n1,square(9))); } ``` # Choices - [ ] 81 - [ ] 9 - [ ] 90 - [ ] 115 --- title: Quiz 31 description: Quiz 31 duration: 60 card_type: quiz_card --- # Question **31.** What will be the output? ``` public static void test1(){ System.out.println("Hi"); System.out.println("Welcome"); } public static void main(){ test1(); System.out.println("Home"); } ``` # Choices - [ ] Hi Welcome Home - [ ] Welcome Home Hi - [ ] Home Welcome Hi --- title: Quiz 32 description: Quiz 32 duration: 60 card_type: quiz_card --- # Question **32.** What will be the output? ``` public static void test2(){ System.out.println("Hi"); return; } public static void main(){ test2(); System.out.println("Hello"); } ``` # Choices - [ ] Hi Hello - [ ] Hello Hi - [ ] Error --- title: Quiz 33 description: Quiz 33 duration: 60 card_type: quiz_card --- # Question **33.** What will be the output? ``` public static boolean isEven(int N){ if(N % 2 == 0){ return true; }else{ return false; } } public static void main(){ System.out.println(isEven(60)); System.out.println("Hello"); } ``` # Choices - [ ] true Hello - [ ] Hello false - [ ] false Hello --- title: Quiz 34 description: Quiz 34 duration: 60 card_type: quiz_card --- # Question **34.** What will be the output? ``` public static void EvenOdd(int N){ if(N % 2 == 0){ System.out.println("Even"); return; } System.out.print("Odd"); } public static void main(){ EvenOdd(10); System.out.println("Hello"); } ``` # Choices - [ ] Even Hello - [ ] Odd Hello - [ ] Hello --- title: Quiz 35 description: Quiz 35 duration: 60 card_type: quiz_card --- # Question **35.** What will be the output? ``` public static int check(int N){ System.out.print(N+10); } public static void main(){ check(15); } ``` # Choices - [ ] 15 - [ ] Error - [ ] No output --- title: Quiz 36 description: Quiz 36 duration: 60 card_type: quiz_card --- # Question **36.** What will be the output? ``` public static int test(int n){ if(n % 2 == 0){ return 2; } if(n % 5 == 0){ return 5; } } public static void main(){ int a = test(15); } ``` # Choices - [ ] 5 - [ ] Error - [ ] 2 - [ ] No output --- title: Quiz 37 description: Quiz 37 duration: 60 card_type: quiz_card --- # Question **37.** What will be the output? ``` public static int sum(int a, int b){ return a+b; System.out.println("Hey"); } public static void main(){ int x = 10, y = 20; System.out.pritnln(sum(x,y)); } ``` # Choices - [ ] Error - [ ] 30 - [ ] Hey --- title: Quiz 38 description: Quiz 38 duration: 60 card_type: quiz_card --- # Question **38.** What will be the output? ``` public static int sum(int a, int b){ int x = 20, y = 30; return a+b; } public static void main(){ int a = 10, b = 5; int x = 100, y = 200; System.out.pritnln(sum(x,y)); } ``` # Choices - [ ] 300 - [ ] 15 - [ ] Compilation error --- title: Quiz 39 description: Quiz 39 duration: 60 card_type: quiz_card --- # Question **39.** What will be the output? ``` public static int sum(int a, int b){ a = 20; b = 30; return a+b; } public static void main(){ int a = 10, b = 5; int x = 100, y = 200; System.out.pritnln(sum(x,y)); } ``` # Choices - [ ] 50 - [ ] 300 - [ ] Compilation error --- title: Quiz 40 description: Quiz 40 duration: 60 card_type: quiz_card --- # Question **40.** What will be the output? ``` public static int sum(int a, int b){ int a = 20, b = 30; return a+b; } public static void main(){ int a = 10, b = 5; int x = 100, y = 200; System.out.pritnln(sum(x,y)); } ``` # Choices - [ ] 50 - [ ] 300 - [ ] Error --- title: Answers to quizzes description: duration: 60 card_type: cue_card --- 1. c) 4 + 5 2. d) Oops!! Nothing will get printed.. 3. b) Line 2 4. c) 45 5. a) 1 6. b) 20 7. c) 21 8. c) 22 9. a) Error 10. a) Distinction Congrats Good luck 11. a) Hi 12. c) No output 13. d) Error 14. b) Error 15. a) 0 1 2 3 4 5 6 7 8 9 10 16. b) 1 1 1 1 1 1 ... loop never stops [infinite loop] 17. b) 6 18. a) n / 3 19. c) 10 8 6 4 2 0 20. c) Nothing will get printed 21. c) Infinite Loop 22. a) counts the number of digits 23. c) \*\*\*\* \*\*\*\* \*\*\*\* \*\*\*\* 24. a) \*\*\*\* 25. b) \* \*\* \*\*\* \*\*\*\* 26. d) \*\*\*\* \*\*\* \*\* \* 27. b) 15 28. a) Error 29. b) 36 30. c) 90 31. a) Hi Welcome Home 32. a) Hi Hello 33. a) true Hello 34. a) Even Hello 35. b) Error 36. b) Error 37. a) Error 38. a) 300 39. a) 50 40. c) Error