Blog

Analyze the following code and indicate, for each line, whether autoboxing, unboxing, or neither occurs when the assignment operator is evaluated: Character c = ‘b’; //  1   occurschar a = c; //  2   occurs   1   : [1]   2   : [2]

Given the following class hierarchy, identify whether the method drive is overloaded, overridden, or neither by the subclass:  public class Car {   public void drive(int miles) { /* implemented */ } } public class Ford extends Car {   public void drive(int miles, String name) { /* implemented */ } }

                . ‘  .           ‘ .( ‘.) ‘     _   (‘-.)’ (`’.) ‘     | (- -(. ‘) WRAPPER (-) ‘  .–`+’-. .  (‘ CLASSES ‘) .  |`—-‘|   (‘ .) – (‘. )  | /..\ |    . (‘ `.  )   |\./\.\|      ` .  `   |./G \/|  |.\ T/.|  `-._/.-‘

Complete the Javadoc comments for the following method:    1     Computes the number of hours practiced on an instrument   based on the pages of sheet music.     2   sheetMusic The number of pages of music     3   Method returns how long instrument has been played */ public String practice( int sheetMusic ) {     return String.format(“Practiced %s for %.2f hours”, this.instrument, sheetMusic * 0.15); }    1  : [1]   2  : [2]   3  : [3]

Complete the Javadoc comments for the following method:    1     Computes the number of hours practiced on an instrument   based on the pages of sheet music.     2   sheetMusic The number of pages of music     3   Method returns how long instrument has been played */ public String practice( int sheetMusic ) {     return String.format(“Practiced %s for %.2f hours”, this.instrument, sheetMusic * 0.15); }    1  : [1]   2  : [2]   3  : [3]

Analyze the following code and indicate, for each line, whether autoboxing, unboxing, or neither occurs when the assignment operator is evaluated: boolean b = new Boolean(true); //  1   occursBoolean a = b; //  2   occurs   1   : [1]   2   : [2]

                . ‘  .           ‘ .( ‘.) ‘     _   (‘-.)’ (`’.) ‘     | (- -(. ‘) WRAPPER (-) ‘  .–`+’-. .  (‘ CLASSES ‘) .  |`—-‘|   (‘ .) – (‘. )  | /..\ |    . (‘ `.  )   |\./\.\|      ` .  `   |./G \/|  |.\ T/.|  `-._/.-‘

Given 3 classes (Archer, Adventurer, and RPG), Archer can inherit from both Adventurer and RPG with the following syntax: public class Archer extends Adventurer, RPG { /* valid class definition */}

Analyze the following code and indicate, for each line, whether autoboxing, unboxing, or neither occurs when the assignment operator is evaluated: boolean b = new Boolean(true); //  1   occursBoolean a = b; //  2   occurs   1   : [1]   2   : [2]

Given the following class hierarchy, identify whether the method drive is overloaded, overridden, or neither by the subclass: public class Car{   public void drive(String n, int p) { /* implemented */ } } public class Tesla extends Car{   public void drive(String name, int power) { /* implemented */ } }