Unit 1 Practice Exam: Methods & Control Structures

Unit 1: Methods & Control Structures

50 Questions • AP Exam Difficulty

Variables • Expressions • Conditionals • Loops • Strings • Math Class

0 Correct | 0 Incorrect | 0/50 Answered

Primitive Types & Expressions (Questions 1-10)

Question 1

What is printed?

int x = 17; int y = 5; System.out.println(x / y + " " + x % y);

A) 3.4 2
B) 3 2
C) 3.4 2.0
D) 4 2

Question 2

What is printed?

double d = 7 / 4; System.out.println(d);

A) 1.75
B) 1.0
C) 2.0
D) 1

Question 3

What is printed?

int a = 5; int b = 2; double result = (double) a / b; System.out.println(result);

A) 2
B) 2.0
C) 2.5
D) 3.0

Question 4

What is printed?

int x = 10; x += 5; x -= 3; x *= 2; System.out.println(x);

A) 14
B) 24
C) 19
D) 20

Question 5

What is printed?

int n = (int) 9.7 + (int) 2.3; System.out.println(n);

A) 12
B) 11
C) 12.0
D) 10

Question 6

What is printed?

int a = 3; int b = 4; int c = a++ + ++b; System.out.println(a + " " + b + " " + c);

A) 4 5 8
B) 4 5 7
C) 3 5 8
D) 4 4 7

Question 7

What is printed?

System.out.println(2 + 3 + "hello" + 4 + 5);

A) 23hello45
B) 5hello45
C) 5hello9
D) 14hello

Question 8

What is the value of result?

int result = Math.abs(-5) + Math.min(3, 7) - Math.max(2, 4);

A) 4
B) 6
C) 8
D) 2

Question 9

Which expression generates a random integer from 5 to 15 inclusive?

A) (int)(Math.random() * 10) + 5
B) (int)(Math.random() * 11) + 5
C) (int)(Math.random() * 15) + 5
D) (int)(Math.random() * 10) + 6

Question 10

What is the value of x?

double x = Math.pow(2, 3) + Math.sqrt(16);

A) 10.0
B) 12.0
C) 11.0
D) 14.0

Boolean Expressions & Conditionals (Questions 11-22)

Question 11

What is printed?

int x = 7; if (x > 5) System.out.print("A"); System.out.print("B"); System.out.print("C");

A) AC
B) ABC
C) BC
D) A

Question 12

What is printed?

int a = 5, b = 10, c = 15; if (a < b) if (b < c) System.out.print("X"); else System.out.print("Y"); else System.out.print("Z");

A) X
B) Y
C) Z
D) XY

Question 13

What is printed?

int x = 8; if (x > 10) System.out.print("A"); else if (x > 5) System.out.print("B"); else if (x > 3) System.out.print("C"); else System.out.print("D");

A) A
B) B
C) BC
D) C

Question 14

What is the value of result?

boolean a = true, b = false, c = true; boolean result = a && b || c;

A) true
B) false
C) Compile error
D) Runtime error

Question 15

What is printed?

int x = 5; if (x > 3 && x++ < 10) { System.out.print(x); }

A) 5
B) 6
C) Nothing prints
D) 4

Question 16

What is printed?

int x = 5; if (x < 3 && x++ < 10) { System.out.print("A"); } System.out.print(x);

A) A5
B) A6
C) 5
D) 6

Question 17

Which is equivalent to: !(a && b)?

A) !a && !b
B) !a || !b
C) a || b
D) !a && b

Question 18

Which is equivalent to: !(x >= 5 || y < 3)?

A) x < 5 && y >= 3
B) x < 5 || y >= 3
C) x <= 5 && y > 3
D) x > 5 && y <= 3

Question 19

What is printed?

int score = 85; String grade; if (score >= 90) grade = "A"; else if (score >= 80) grade = "B"; else if (score >= 70) grade = "C"; else grade = "F"; System.out.println(grade);

A) A
B) B
C) C
D) F

Question 20

What is printed?

int x = 10, y = 20; boolean result = (x == 10) == (y == 20); System.out.println(result);

A) true
B) false
C) Compile error
D) 1

Question 21

What is printed?

int n = 0; if (n != 0 && 10 / n > 1) { System.out.print("A"); } else { System.out.print("B"); }

A) A
B) B
C) ArithmeticException
D) Nothing prints

Question 22

What is the value of x after execution?

int x = 5; int y = 3; x = (y > 2) ? x * 2 : x + 2;

A) 5
B) 7
C) 10
D) 3

Iteration / Loops (Questions 23-35)

Question 23

What is printed?

for (int i = 1; i <= 5; i++) { if (i == 3) continue; System.out.print(i + " "); }

A) 1 2 3 4 5
B) 1 2 4 5
C) 1 2
D) 4 5

Question 24

What is printed?

for (int i = 1; i <= 5; i++) { if (i == 3) break; System.out.print(i + " "); }

A) 1 2 3 4 5
B) 1 2 4 5
C) 1 2
D) 1 2 3

Question 25

How many times does "Hello" print?

int count = 0; while (count < 10) { System.out.println("Hello"); count += 3; }

A) 3
B) 4
C) 10
D) Infinite loop

Question 26

What is the value of sum?

int sum = 0; for (int i = 1; i <= 100; i++) { if (i % 10 == 0) sum += i; }

A) 100
B) 550
C) 450
D) 500

Question 27

What is printed?

int x = 5; while (x > 0) { System.out.print(x + " "); x -= 2; }

A) 5 3 1
B) 5 3 1 -1
C) 5 4 3 2 1
D) 5 3

Question 28

What is the value of total?

int total = 0; for (int i = 0; i < 5; i++) { for (int j = 0; j < 3; j++) { total++; } }

A) 8
B) 15
C) 5
D) 3

Question 29

What is printed?

for (int i = 1; i <= 3; i++) { for (int j = 1; j <= i; j++) { System.out.print("*"); } System.out.println(); }

A) ***
***
***
B) *
**
***
C) ***
**
*
D) *
*
*

Question 30

What is the final value of n?

int n = 64; int count = 0; while (n > 1) { n /= 2; count++; } System.out.println(count);

A) 5
B) 6
C) 7
D) 32

Question 31

What is printed?

int i = 0; while (i < 5) { i++; if (i % 2 == 0) continue; System.out.print(i + " "); }

A) 1 2 3 4 5
B) 2 4
C) 1 3 5
D) 0 2 4

Question 32

What is the value of product?

int product = 1; for (int i = 1; i <= 5; i++) { product *= i; }

A) 15
B) 120
C) 5
D) 25

Question 33

How many times does the inner loop body execute?

for (int i = 0; i < 4; i++) { for (int j = i; j < 4; j++) { // body } }

A) 16
B) 10
C) 12
D) 8

Question 34

What is printed?

int x = 1; do { System.out.print(x + " "); x *= 2; } while (x < 20);

A) 1 2 4 8 16
B) 1 2 4 8
C) 2 4 8 16
D) 1 2 4 8 16 32

Question 35

What is the value of sum?

int sum = 0; for (int i = 10; i >= 1; i--) { if (i % 3 == 0) sum += i; }

A) 18
B) 9
C) 27
D) 12

String Methods & Manipulation (Questions 36-45)

Question 36

What is printed?

String s = "COMPUTER"; System.out.println(s.substring(3, 6));

A) MPU
B) PUT
C) MPUT
D) UTE

Question 37

What is printed?

String s1 = "Hello"; String s2 = "Hello"; String s3 = new String("Hello"); System.out.println((s1 == s2) + " " + (s1 == s3));

A) true true
B) false false
C) true false
D) false true

Question 38

What is printed?

String s = "programming"; System.out.println(s.indexOf("mm") + " " + s.indexOf("z"));

A) 6 -1
B) 5 -1
C) 6 0
D) 7 -1

Question 39

What is printed?

String s = "Java"; s.toUpperCase(); System.out.println(s);

A) JAVA
B) Java
C) java
D) Compile error

Question 40

What is printed?

String s = "ABCDE"; int result = s.compareTo("ABCFG"); System.out.println(result < 0);

A) true
B) false
C) 0
D) Compile error

Question 41

What is the value of count?

String s = "Mississippi"; int count = 0; for (int i = 0; i < s.length(); i++) { if (s.charAt(i) == 's') { count++; } } System.out.println(count);

A) 2
B) 4
C) 5
D) 3

Question 42

What is printed?

String s = "Hello World"; System.out.println(s.substring(0, 5).toLowerCase());

A) Hello
B) hello
C) HELLO
D) hello world

Question 43

What is printed?

String s = "racecar"; String reversed = ""; for (int i = s.length() - 1; i >= 0; i--) { reversed += s.charAt(i); } System.out.println(s.equals(reversed));

A) true
B) false
C) racecar
D) Compile error

Question 44

What is printed?

String s = " Hello "; System.out.println("[" + s.trim() + "]");

A) [ Hello ]
B) [Hello]
C) [ Hello ]
D) []

Question 45

What is printed?

String s = "12345"; int sum = 0; for (int i = 0; i < s.length(); i++) { sum += Integer.parseInt(s.substring(i, i + 1)); } System.out.println(sum);

A) 12345
B) 15
C) 5
D) Compile error

Methods & Return Values (Questions 46-50)

Question 46

What is printed?

public static int mystery(int n) { if (n < 10) return n; return mystery(n / 10) + n % 10; } // In main: System.out.println(mystery(1234));

A) 1234
B) 10
C) 4
D) 4321

Question 47

What is printed?

public static void change(int x) { x = x * 2; } // In main: int num = 5; change(num); System.out.println(num);

A) 5
B) 10
C) 0
D) Compile error

Question 48

What is printed?

public static int compute(int a, int b) { if (b == 0) return a; return compute(b, a % b); } // In main: System.out.println(compute(48, 18));

A) 48
B) 18
C) 6
D) 2

Question 49

What is the return type of a method that doesn't return anything?

A) null
B) void
C) empty
D) None

Question 50

What is printed?

public static int process(int n) { int result = 0; while (n > 0) { result = result * 10 + n % 10; n /= 10; } return result; } // In main: System.out.println(process(12345));

A) 12345
B) 54321
C) 15
D) 5

🎉 Unit 1 Complete!

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