AP CS A Unit 2 Test 2 Review

Logical & Comparison Operators

100

What is the only && relationship between two Booleans that results in true? 

true && true

200

What is the result of: !true || (false && true)?

false

300

Evaluate: 

(5 >= 5) && ( 3 < 1 || !(2 != 2) )

true

400

What is the result of:

"cat".equals("Cat") || (4 % 2 != 0)?

false

500

Evaluate the full expression:
 !(7 > 2 && "hi".length() == 2) || (3 <= 1)

False

!(true && true) || false  
!true || false  
false || false  
false

If-Statements & Control Flow

100

In an if-elseif-else chain, how many branches will run?

Exactly one branch will run.

200

What is printed?

int x = 7;
if (x > 5) System.out.print("A");
if (x > 2) System.out.print("B");
else System.out.print("C");

AB

300

What is the difference between a single large if-else chain and several individual if statements?

A large if-else chooses only one true branch; several ifs evaluate all conditions independently.

400

What is printed?

int n = 10;
if (n % 2 == 0)
    if (n > 5)
        System.out.print("X");
    else
        System.out.print("Y");

X

500

What is printed?

int a = 4;
if (a < 10)
    if (a % 3 == 1)
        System.out.print("M");
    else
        System.out.print("N");
else
    System.out.print("P");

M

Loops & Tracing

100

How many times does this loop run?

for (int i = 2; i < 6; i++)

4 times

200

What is printed?

int i = 1;
while (i < 4) {
    System.out.print(i);
    i++;
}

123

300

What is the difference between these loops

for (int i = 0; i < 5; i++) { System.out.print(i);}

int i = 0;
while (i < 5) {
    System.out.print(i);
    i++;
}

They are equivalent!  A for loop and a while loop can be the same. 

400

What is printed?

for (int r = 0; r < 2; r++) {

    for (int c = 0; c < 3; c++) {
        System.out.print("*");
    }

    System.out.println();
}

***
***

500

How many times does the inner loop run total?

for (int r = 0; r < 3; r++) {
    for (int c = 2; c <= 6; c += 2) {
        // work
    }
}

Inner runs 3 times each row → 3×3 = 9 total.

Strings & Methods

100

If a String has length 6, what is its last index?

5

200

What does "hello".substring(1,4) return?

"ell"

300

What is returned by: "banana".indexOf("a")?

1

400

What is printed?

String s = "code";
for (int i = 0; i < s.length(); i++) {
    System.out.print(s.charAt(i));
}

code

500

SURPRISE!  A question about Random!!!

Create a variable "rangeOfDays" and set it equal to a random number between 225 and 275, inclusive.  

int rangeOfDays = (int) (Math.random() * 51 ) + 225;

Trivia Time!

100

What is the smallest country in the world by land area?

Vatican City

200

Which element has the highest melting point of all elements?

Tungsten

300

 What continent has the most countries?

 Africa (54 countries)

400

Who was the first woman to win a Nobel Prize?

Marie Curie

500

Which artist holds the record for the most streamed song on Spotify of all time?

The Weeknd (“Blinding Lights”)