CodeHS - Java Karel - Sec 1-13 Review

Which is DEFINING the buildTower() method?

• private void buildTower()

  {

  
  

  }

• buildTower();

• while(frontIsClear())

  {

  
  

  }

• for(int i = 0; i<10; i++)

  {

  
  

  }

What happens with the following?

for(int i = 0; i < 6; i++)

{

putBall();

}

• 0 tennis balls are put down

• 6 tennis balls are put down

• 0 tennis balls are picked up

• 6 tennis balls are picked up

What happens with the following code?

while(frontIsClear())

{

move()

}

• Karel moves 5 times

• Karel picks up an unknown number of tennis balls

• Karel puts down an unknown number of tennis balls

• Karel moves an unknown number of times

What line does the run method end on?

Why do we use a for loop in programming

• Easier to read

• It's more efficient

• To repeat an action a number of times

• To repeat an action an unknown number of times

Which code is correct? Karel starts in the bottom left corner and the starting world has zero tennis balls.

• for(int i = 0; i < 4; i++)

  {

  move();

  }

  putBall();

• for(int i = 0; i < 2; i++)

  {

  move();

  }

  putBall();

• for(int i = 0; i < 3; i++)

  {

  move();

  }

  putBall();

which code is correct? Karel starts in the bottom left corner and the starting world has zero tennis balls.

• for(int i = 0; i < 2; i++)

  {

  move();

  turnLeft();

  move();

  }

  putBall();

• move();

  turnRight();

  move();

  putBall();

• move();

  turnLeft();

  move();

  putBall();

Which code is correct? Karel starts in the bottom left corner and the starting world has zero tennis balls.

• for(int i = 0; i < 100; i++)

  {

  putBall();

  }

  move();

• move();

  for(int i = 0; i < 100; i++)

  {

  putBall();

  }

  move();

• for(int i = 0; i < 100; i++)

  {

  move();

  putBall();

  move();

  }

Why do we use a while loop in programming

• Easier to read

• It's more efficient

• To repeat an action a number of times

• To repeat an action an unknown number of times