Free 1z0-803: Java SE 7 Programmer I Exam Questions and Answers

Given: import java.util.*; public class Test { public static void main(String[] args) { List<String> list = new ArrayList<>(); list.add("A"); list.add("B"); list.add("C"); list.add("B"); list.remove("B"); list.add(1, "D"); list.set(3, "E"); // line n1 } } Which two statements are true when the code reaches line n1? (Choose two.)

Select 2 answers.

• AA. list.size() returns 4.
• BB. list.indexOf("C") returns 2.
• CC. list.get(3) returns "B".
• DD. list.get(1) returns "C".
• EE. list.contains("B") returns true.

Given: // line n1 public class Clock { public static void main(String[] args) { List<Date> dates = new ArrayList<>(); dates.add(new Date()); System.out.println(dates.size()); } } Which code fragment, when inserted at line n1, enables the code to print 1?

• AA. import java.util.List; import java.util.ArrayList; import java.sql.Date;
• BB. import java.util.List; import java.util.Date;
• CC. import java.util.List; import java.util.ArrayList;
• DD. import java.util.*;
• EE. import java.util.ArrayList; import java.util.Date;

Given: public class Test { public static void main(String[] args) { int count = 0; outer: for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { if (j == 2) continue outer; if (i == 3) break outer; count++; } } System.out.println(count); } } What is the result?

• AA. 3
• BB. 4
• CC. 6
• DD. 8
• EE. 12

Given the declarations in a method: double d = 4.5; StringBuilder sb = new StringBuilder("ab"); Which statement is true?

• AA. The variable d stores a reference to a Double object created automatically.
• BB. The variable sb can be assigned null, but the variable d cannot.
• CC. Both variables are assigned default values when declared as local variables.
• DD. The variable sb stores the characters of its content directly in the variable.
• EE. The variable d can invoke methods such as toString() on its value.

Given: package bank; public class Account { private double balance; int branchCode; protected String owner; public String label; public void deposit(double amt) { balance += amt; } } package audit; import bank.Account; public class Auditor { public void check(Account a) { // line n1 } } Auditor does not extend Account. Which two statements, when inserted at line n1, compile successfully? (Choose two.)

Select 2 answers.

• AA. a.deposit(25.0);
• BB. a.branchCode = 7;
• CC. a.balance = 0;
• DD. a.owner = "Lee";
• EE. a.label = "Main";

Given: public class Printer { static void show(int n) { System.out.print("int "); } static void show(long n) { System.out.print("long "); } static void show(Integer n) { System.out.print("Integer "); } static void show(Object o) { System.out.print("Object "); } public static void main(String[] args) { byte b = 5; show(b); show('a'); show(2.5f); show(Integer.valueOf(9)); } } What is the result?

• AA. int long Object Integer
• BB. Compilation fails.
• CC. int int long Integer
• DD. int int Object Integer
• EE. long int Object Integer

Given: public class Tracker { public static void main(String[] args) { System.out.print("A"); main(5); System.out.print("C"); } public static void main(int n) { System.out.print("B" + n); } } The program is started with the command: java Tracker What is the result?

• AA. AB5C
• BB. AB5
• CC. Compilation fails.
• DD. AC
• EE. An exception is thrown at runtime.

Given the code fragment: int[] nums = {1, 2, 3}; for (int n : nums) { n = n * 2; } System.out.println(nums[0] + nums[1] + nums[2]); What is the result?

• AA. Compilation fails.
• BB. 12
• CC. 6
• DD. An exception is thrown at runtime.

Given: public class Flow { static int run() { int x = 1; try { x++; Object o = "text"; Integer i = (Integer) o; x++; } catch (ClassCastException e) { x += 10; return x; } finally { x += 100; } return x; } public static void main(String[] args) { System.out.println(run()); } } What is the result?

• AA. 12
• BB. 3
• CC. Compilation fails.
• DD. An exception is thrown at runtime.
• EE. 112

Given: class Base { String name = "base"; String get() { return name; } } class Derived extends Base { String name = "derived"; String get() { return name; } } public class Test { public static void main(String[] args) { Base b = new Derived(); System.out.println(b.name + " " + b.get()); } } What is the result?

• AA. base derived
• BB. base base
• CC. derived base
• DD. Compilation fails.
• EE. derived derived