Simulador de preparacion exmen certificacion JAVA 7 developer

Question

what are the valid components of a java source file (choose all that apply)

Answer 1

package statement

Answer 2

import statements

Answer 3

java compiler

Answer 4

java runtime environment

Answer 5

1,3,2,5,6,4

Answer 6

3,1,2,5,4,6

Answer 7

3,2,1,4,5,6

Answer 8

3,2,1,5,6,4

Answer 9

Image:

7508cd52-8d2f-456b-94a2-ebbd5b7d22ee (image/png)

Answer 10

Image:

f42cd16c-e2ca-45ba-937c-ddc3bfa9d15a (image/png)

Answer 11

Image:

7e793509-6c1a-40f4-996b-0457bd99423c (image/png)

Answer 12

Image:

1a172624-0271-4220-b562-d511b14d9952 (image/png)

Answer 13

Image:

cb13cfd1-b40a-47a9-9032-0e19d91ec8b9 (image/png)

Answer 14

Image:

8ff52d83-0179-4d6e-9ffa-6f0fe96381e0 (image/png)

Answer 15

one:two:three

Answer 16

EJavaGuru:one:tow

Answer 17

java:EJavaGuru:one

Answer 18

tow:three:four

Answer 19

the imported class, java.util.Date, can be accessed only in the class Student.

Answer 20

the imported class, java.util.Date, can be accessed by both the Student and Course classes

Answer 21

Both of the classes Student and Course are defined in the package com.ejavaguru.

Answer 22

Course is defined in the default java package.

Answer 23

public void main (String [] args)

Answer 24

public void main (String args [] )

Answer 25

static public void main (String[] array)

Answer 26

public static void main (String args)

Answer 27

static public main (String args[])

Answer 28

you can start the execution of a java application through the main method

Answer 29

the java compiler calls and executes the main method

Answer 30

the java virtual machine calls and executes the main method

Answer 31

a class calls and executes the main method

Answer 32

import mycode.com.ejavaguru.Course;

Answer 33

import com.ejavaguru.Course;

Answer 34

import mycode.com.ejavaguru;

Answer 35

import com.ejavaguru;

Answer 36

import mycode.com.ejavaguru.*;

Answer 37

import com.ejavaguru.*;

Answer 38

class EJavaGuru will print Java

Answer 39

class EJavaGuru will print null

Answer 40

class EJavaGuru will won't compile

Answer 41

class EJavaGuru will throw an exception at runtime

Answer 42

the class EJavaGuru will print java

Answer 43

the class EJavaGuru will print null

Answer 44

the class EJavaGuru will not compile

Answer 45

the class EJavaGuru will throw an exception at runtime

Answer 46

you can't define a method argument as a private variable

Answer 47

a method argument should be defined with either public or default accessibility

Answer 48

for overridden methods, method arguments should be defined with protected accessibility.

Answer 49

none of the above

Answer 50

a programmer can't define a new primitive data type

Answer 51

a programmer can define a new primitive data type

Answer 52

once assigned, the value of a primitive can't be modified

Answer 53

a value can't be assigned to a primitive variable

Answer 54

code at line 4 fails to compile

Answer 55

code at line 5 fails to compile

Answer 56

code at line 6 fails to compile

Answer 57

code at line 7 fails to compile

Answer 58

long, boolean, double

Answer 59

long, int, float

Answer 60

char, int, double

Answer 61

long, boolean, float

Answer 62

bit a = 0;

Answer 63

integer a2 = 7;

Answer 64

long a3 =0X10C;

Answer 65

short a4 = 0512;

Answer 66

double a5 = 10;

Answer 67

byte a7 = -0;

Answer 68

long a8 = 123456789;

Answer 69

compilation error

Answer 70

code prints true

Answer 71

code prints false

Answer 72

code prints >= false

Answer 73

compilation error

Answer 74

Image:

ef1164fc-db95-4f93-a5df-f4308ccff5ba (image/png)

Answer 75

Image:

0a0e38b1-845f-4ff7-8872-df4320b0936c (image/png)

Answer 76

Image:

297b0209-a801-44b4-b2db-371c6e8926f3 (image/png)

Answer 77

Image:

4c3009d4-df77-499e-8fef-8e6f2cac9682 (image/png)

Answer 78

define instance variables as private members

Answer 79

define public methods to access and modify the instance variables

Answer 80

define some of the instance variables as public members

Answer 81

all of the previous

Answer 82

true, true, false

Answer 83

10.0, false, false

Answer 84

false, false, false

Answer 85

compilation error

Answer 86

code prints false

Answer 87

code prints true

Answer 88

a code will print true if code on line 6 is modified to the following

Image:

83f7bed2-4113-445b-ab68-97508b06a41f (image/png)

Answer 89

code will print true if code on line 6 is modified to the following

Image:

d8b86cb5-a0dd-4892-98b9-74e1927ade3e (image/png)

Answer 90

the heigth de a Person can never be set to more than 300.

Answer 91

the previous code is an example of a well-encapsulated class

Answer 92

the class would be better encapsulated if the heigth validation weren't set to 300.

Answer 93

even though the class isn't well encapsulated, it can be inherited by other classes

Answer 94

Image:

c31ed092-c803-484e-ab55-2825fdf0e3fd (image/png)

Answer 95

Image:

f29d4398-e3d8-410d-8ed8-b4c8a4d3369f (image/png)

Answer 96

Image:

5384b06f-28b7-4b48-aee5-8c4cf3713ccd (image/png)

Answer 97

Image:

a7c0037f-e763-46cf-8401-9c51ae380170 (image/png)

Answer 98

if the return type of a method is int, the method can return a value od type byte

Answer 99

a method may or may not return a value

Answer 100

if the return type of a method is void, it can define a return statement without a value, as follows: "return;"

Answer 101

a method may or may not accept any method arguments.

Answer 102

a method should accept at least one method argument or define its return type.

Answer 103

a method whose return type is String can't return null

Answer 104

anotherMethod, anotherMethod, someMethod, someMethod

Answer 105

anotherMethod, EJava, someMethod, someMethod

Answer 106

anotherMethod, EJava, someMethod, EJava

Answer 107

Compilation error.

Answer 108

20 10 11 11

Answer 109

20 20 11 10

Answer 110

20 10 11 10

Answer 111

compilation error

Answer 112

private String eJava(int val, String firstName, double dur)

Answer 113

public void eJava(int val1, String val2, double val3)

Answer 114

String eJava(int name , String age, double duration)

Answer 115

float eJava(double name, String age, byte duration)

Answer 116

ArrayList<String> eJava()

Answer 117

char[] eJava(double numbers)

Answer 118

String eJava()

Answer 119

Compilation error

Answer 120

Rintime exception

Answer 121

int String

Answer 122

long Object

Answer 123

The class EJava defines three overloaded contructors

Answer 124

The class Ejava define two overloaded contructors. The private constructor isn't counted as an overloaded constructor.

Answer 125

Constructors with different access modifiers can't call each other

Answer 126

the code prints the following: protected private public

Answer 127

the code prints the following: public private protected

Answer 128

If a user defines a private constructor for a public class, Java creates a public default constructor for the class.

Answer 129

A class that gets a default constructor doesn’t have overloaded constructors.

Answer 130

A user can overload the default constructor of a class.

Answer 131

The following class is eligible for default constructor: class EJava {}

Answer 132

The following class is also eligible for a default constructor: class EJava { void EJava() {} }

Answer 133

Compilation error

Answer 134

compilation error

Answer 135

int[][] array1 = {{1, 2, 3}, {}, {1, 2,3, 4, 5}};

Answer 136

int[][] array2 = new array() {{1, 2, 3}, {}, {1, 2,3, 4, 5}};

Answer 137

int[][] array3 = {1, 2, 3}, {0}, {1, 2,3, 4, 5};

Answer 138

int[][] array5 = new int[2][];

Answer 139

By default, an ArrayList creates an array with an initial size of 16 to store its elements.

Answer 140

Because ArrayList stores only objects, you can’t pass element of an ArrayList to a switch construct.

Answer 141

Calling clear() or remove() on an ArrayList, will remove all its elements.

Answer 142

If you frequently add elements to an ArrayList, specifying a larger capacity will improve the code efficiency.

Answer 143

Calling the method clone() on an ArrayList creates its shallow copy; that is, it doesn’t clone the individual list elements.

Answer 144

An ArrayList offers a resizable array, which is easily managed using the methods it provides. You can add and remove elements from an ArrayList.

Answer 145

Values stored by an ArrayList can be modified.

Answer 146

You can iterate through elements of an ArrayList using a for loop, Iterator, or ListIterator.

Answer 147

An ArrayList requires you to specify the total elements before you can store any elements in it.

Answer 148

An ArrayList can store any type of object.

Answer 149

Line 7 prints true

Answer 150

Line 7 prints false

Answer 151

Line 8 prints -1

Answer 152

Line 8 prints 1

Answer 153

Line 9 removes all elements of the list ejg

Answer 154

Line 9 sets ejg to null

Answer 155

Line 10 prints null

Answer 156

Line 10 prints []

Answer 157

Line 10 prints a value similar to ArrayList@16356

Answer 158

Line 11 throws an exception

Answer 159

true printed once

Answer 160

false printed once

Answer 161

true printed in an infinite loop

Answer 162

false printed in an infinite loop

Answer 163

dRuntime exception

Answer 164

Runtime exception

Answer 165

The enhanced for loop can’t be used within a regular for loop.

Answer 166

The enhanced for loop can’t be used within a while loop.

Answer 167

The enhanced for loop can be used within a do-while loop.

Answer 168

The enhanced for loop can’t be used within a switch construct.

Answer 169

All of the above statements are false.

Answer 170

true false ABC

Answer 171

Compilation error

Answer 172

case 10*3: System.out.println(2);

Answer 173

case num: System.out.println(3);

Answer 174

case 10/3: System.out.println(4);

Answer 175

case num2: System.out.println(5);

Answer 176

Compilation error

Answer 177

default case1 case2

Answer 178

case1 case2

Answer 179

Compilation error

Answer 180

Runtime exception

Answer 181

ejava enum guru

Answer 182

ejavaguru e

Answer 183

ejava enum guru ejavaguru

Answer 184

Compilation error

Answer 185

Compilation error

	Criado por JUAN JOSÈ ORJUEL mais de 9 anos atrás

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Simulador de preparacion exmen certificacion JAVA 7 developer

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