What value does read() return when it has reached the end of a file?

1001

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What class is the top of the awt event hierarchy?

1055

---

How are the elements of a cardlayout organized?

1048

---

What method is invoked to cause an object to begin executing as a separate thread?

998

---

What is the relationship between an event-listener interface and an event-adapter class?

1098

---

What must a class do to implement an interface?

1130

---

What value does readline() return when it has reached the end of a file?

1056

---

When a thread blocks on i/o?

1050

---

Which characters may be used as the second character of an identifier, but not as the first character of an identifier?

1015

---

Which javutil classes and interfaces support event handling?

1007

---

What is the immediate superclass of the applet class?

1046

---

Is “abc” a primitive value?

1070

---

What is the map interface?

1095

---

What state does a thread enter when it terminates its processing?

1034

---

What is the difference between the string and stringbuffer classes?

1053

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