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Given:
What is the result?
Answer: C
The answer is the letter C. The default value of a Character is null because it is not primitive and every type that is not primitive has its default value (null), the default value of a boolean is false and the default value is a float is 0.0
Source: Adapted from community discussion — iSnover
Which two code fragments cause compilation errors? (Choose two.)
Answer: AC
Answer is AC. Options that do not compile are A and C. Here is similar variables to test: public static void main(String[] args) { double y1 = 203.22; float fit = y1; // A --- error float fit2 = (float) 1_11.00; // B Float fit3 = 100.00; // C --- error int y2 = 100; float fit4 = (float) y2; // D float fit5 = 100.00F; // E }
Source: Adapted from community discussion — carloswork
Given the code fragment:
Which action enables the code to print Helping`¦ Done?
Answer: C
Correct answer is: C The answer lies on the surface - you just have to be careful. An abstract class method must either be abstract or have an implementation! In this case, we need to fix the syntax error - make the method abstract.
Source: Adapted from community discussion — dsms
Given:
What is the result?
Answer: C
Given the content from the Tree.java and Plant.java files:
and the code fragment: 9. Plant t = new Plant(); 10. /* insert code fragment here */ Which code fragment is valid at line 10?
Answer: B
Answer is B. To Test (attention to test in different packages and files, as stated): ---------------------------------------------------------------- package branch; import root.*; public class Plant extends Tree { public static void main(String[] args) { Plant t = new Plant(); t.m1(); // Answer A --- Ok, but incomplete. t.m1(); t.m3(); // Answer B --- Ok t.m1(); t.m3(); t.m4(); // Answer C --- Error t.m1(); t.m4(); // Answer D --- Error } } ------------------------- package root; public class Tree { public void m1() {} private void m2() {} protected void m3() {} void m4() {}; } ----------------------------------------------------------------
Source: Adapted from community discussion — carloswork
Given the content of the Customer.java and Trader.java files:
Which two methods can be overridden in the Trader class from the Customer class? (Choose two.)
Answer: BD
An erratum to my previous comment, the correct one is BD - B: m3 is protected, but can be accessed if the other class extends the parent class even though it is in a different package. - D: m1 is public, just by importing the package you can access it normally.
Source: Adapted from community discussion — iSnover
Given the code fragment:
You want the code to print: Sold: 5 items. Stock in Hand: 5 - Purchased: 5 items. Stock in Hand: 10? Which action enables the code to print this?
Answer: C
Correct, Aswer is C. To test: public class StockRoom { private int stock = 10; // declare as static private int qty; // declare as static public void purchase(int q) {stock += q; this.qty = q;} public void sell(int q) {stock -= q; this.qty = q;} public void printStock(String action ) { declare as static System.out.println(action + ":" + qty + " items. Stock in Hand: " + stock); } public static void main (String[] args) { StockRoom k1 = new StockRoom(); k1.sell(5); StockRoom.printStock("Sold"); StockRoom k2 = new StockRoom(); k2.purchase(5); StockRoom.printStock("Purchased"); } }
Source: Adapted from community discussion — carloswork
Given the code fragment:
What is the result?
Answer: C
output: -1 4 Code: public static void main(String[] args) { StringBuilder sObj = new StringBuilder("Java"); System.out.println(sObj.indexOf("the")); sObj.append("the Great"); System.out.println(sObj.indexOf("the")); }
Source: Adapted from community discussion — jackymak
Given the code fragment:
What is the result?
Answer: C
public static void main(String[] args) { int[] codes = new int[5]; codes[1] = 10; codes[2] = 20; codes[3] = 30; codes[4] = 40; codes[5] = 50; for (int i = 1; i < codes.length; i++) { System.out.println(codes[i] + ":"); } }
Source: Adapted from community discussion — jackymak
Given the code fragment:
What is the result?
Answer: A
Answer is A. Here is the source code to test: public static void main(String[] args) { int x = 100; int a = x++; //x++ makes x=101 but returns old value so a =100 int b = ++x;// ++x makes x=102 and returns new value so b=102 int c = x++;//x++ makes x=103 but returns old value so c =102 int d = (a (a d=a System.out.println(d); }
Source: Adapted from community discussion — sushmitvawal
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