Questions/quizzes: scjp

Text Age Difficulty Value Creator Published DETAILS
en Which of the following Java methods would accept a variable number of arguments?
Ⓐ 3 - Szabolcs 2012.01.20. @*0*3*0*0%*Ⓐ (Ⓐ)*3 (3)*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*
en Given the following Java code: class Dog { } class Spaniel extends Dog { } class DogTest { public static void main(String [] args) { Dog d1 = new Dog(); Spaniel h1 = new Spaniel(); Dog d2 = h1; Spaniel h2 = (Spaniel) d2; Spaniel h3 = (Spaniel) d1; } } What happens when we compile and run this code?
Ⓐ 4 - Szabolcs 2012.01.20. @*0*3*0*0%*Ⓐ (Ⓐ)*4 (4)*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*
en Given the following Java code: class Test2 { public static void main(String [] args) { boolean x = true; boolean y = false; short z = 42; if((x == true) && (y = true)) z++; if((y == true) || (++z == 44)) z++; System.out.println("z = " + z); } } What is the result of the compilation and running?
Ⓐ 4 - Szabolcs 2012.01.20. @*0*3*0*0%*Ⓐ (Ⓐ)*4 (4)*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*
en Given the following methods from java.lang.Object and java.lang.Thread, which two must be invoked from within a synchronized context?
Ⓐ 3 - Szabolcs 2012.01.20. @*0*4*1*25%*Ⓐ (Ⓐ)*3 (3)*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*- / -*0 / 0 vote*
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