Java Programming Test (Random Questions)

Java Programming Test (Random Questions) - Computer Science & Engineering

Instruction:

This is a FREE online test. DO NOT pay money to anyone to attend this test.
Total number of questions : 20.
Time alloted : 30 minutes.
Each question carry 1 mark, no negative marks.
DO NOT refresh the page.
All the best :-).

Which of the following is the correct way to implement the interface given below?

interface IPerson
{
String FirstName
{
get;
set;
}
}

	A.	class Employee : IPerson { private String str; public String FirstName { get { return str; } set { str = value; } } }class Employee { private String str; public String IPerson.FirstName { get { return str; } set { str = value; } } }
	B.	class Employee { private String str; public String IPerson.FirstName { get { return str; } set { str = value; } } }
	C.	class Employee : implements IPerson { private String str; public String FirstName { get { return str; } set { str = value; } } }
	D.	None of the above

Your Answer: Option

Correct Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

You have two switches connected together with two crossover cables for redundancy, and STP is disabled. Which of the following will happen between the switches?

	A.	The routing tables on the switches will not update.
	B.	The MAC forward/filter table will not update on the switch.
	C.	Broadcast storms will occur on the switched network.
	D.	The switches will automatically load-balance between the two links.

Your Answer: Option

Correct Answer: Option C

Explanation:

If spanning tree is disabled on a switch and you have redundant links to another switch, broadcast storms will occur, among other possible problems.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

Which of the following statements are correct about inspecting an attribute in C#.NET?

1 An attribute can be inspected at link-time.

2 An attribute can be inspected at compile-time.

3 An attribute can be inspected at run-time.

4 An attribute can be inspected at design-time.

	A.	1, 2
	B.	3, 4
	C.	1, 3, 4
	D.	All of the above
	E.	None of the above

Your Answer: Option

Correct Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?

	A.	Router(config)#ip classless
	B.	Router(config)#no ip classful
	C.	Router(config)#ip unnumbered
	D.	Router(config)#ip subnet-zero

Your Answer: Option

Correct Answer: Option D

Explanation:

A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the command ip subnet-zero is not used, then only 6 subnets would be available for use.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

An action assertion must include which of the following?

	A.	Anchor object
	B.	Action
	C.	Corresponding object
	D.	All of the above.

Your Answer: Option

Correct Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

To obtain the structure of an Oracle table, the command to use is:

	A.	STRUCTURE [TableName].
	B.	DESCRIBE [TableName].
	C.	DESCRIBE STRUCTURE [TableName].
	D.	DESC TABLE [TableName].

Your Answer: Option

Correct Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

What function should be used to free the memory allocated by calloc() ?

	A.	dealloc();
	B.	malloc(variable_name, 0)
	C.	free();
	D.	memalloc(variable_name, 0)

Your Answer: Option

Correct Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

Which of the following statements is correct about an interface used in C#.NET?

	A.	One class can implement only one interface.
	B.	In a program if one class implements an interface then no other class in the same program can implement this interface.
	C.	From two base interfaces a new interface cannot be inherited.
	D.	Properties can be declared inside an interface.
	E.	Interfaces cannot be inherited.

Your Answer: Option

Correct Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

	A.	LIKE only.
	B.	IN only.
	C.	NOT IN only.
	D.	Both IN and NOT IN.

Your Answer: Option

Correct Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

10.

Which of the following is(are) true of system analysts?

	A.	their responsibility is to analyze and design system software
	B.	they may be looked upon as an intermediary between users and programmers
	C.	they are heavily involved with the system-development life cycle
	D.	both (a) and (c)
	E.	None of the above

Your Answer: Option

Correct Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

11.

Which of the following types of connections can use full duplex?

Hub to hub
Switch to switch
Host to host
Switch to hub
Switch to host

	A.	1, 2 and 4
	B.	3 and 4
	C.	3 and 5
	D.	2, 3 and 5

Your Answer: Option

Correct Answer: Option D

Explanation:

Hubs cannot run full-duplex Ethernet. Full duplex must be used on a point-to-point connection between two devices capable of running full duplex. Switches and hosts can run full duplex between each other, but a hub can never run full duplex.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

12.

Assembler is

	A.	a program that automate the translation of assembly language into machine language
	B.	a program that accepts a program written in a high level language and produces an object program
	C.	a program that places programs into memory and prepares them for execution
	D.	is a program that appears to execute a source program as if it were machine language

Your Answer: Option

Correct Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

13.

You want to view the contents of autoexec.bat on the screen using the "type" command, but it scrolls by too quickly, what switch do you use to make it pause?

	A.	type c:\autoexec.bat /p
	B.	type c:\autoexec.bat/more
	C.	type c:\autoexec.bat\|pause
	D.	type c:\autoexec.bat\|more.
	E.	None of the above

Your Answer: Option

Correct Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

14.

Error reports are an example of:

	A.	scheduled reports
	B.	demand reports
	C.	exception reports
	D.	predictive reports
	E.	management reports

Your Answer: Option

Correct Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

15.

Which one of the following statements is true for the voltages in a series RC circuit?

	A.	The total voltage is equal to the sum of the voltages across the resistance and capacitance
	B.	The voltage always has the same amplitude and phase for every part of the circuit
	C.	The total voltage is less than the sum of the voltages across the resistance and capacitance
	D.	The total voltage is greater than the sum of the voltages across the resistance and capacitance
	E.	None of the above

Your Answer: Option

Correct Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

16.

Which collection class allows you to grow or shrink its size and provides indexed access to its elements, but whose methods are not synchronized?

	A.	java.util.HashSet
	B.	java.util.LinkedHashSet
	C.	java.util.List
	D.	java.util.ArrayList

Your Answer: Option

Correct Answer: Option D

Explanation:

All of the collection classes allow you to grow or shrink the size of your collection. ArrayList provides an index to its elements. The newer collection classes tend not to have synchronized methods. Vector is an older implementation of ArrayList functionality and has synchronized methods; it is slower than ArrayList.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

17.

Format flags may be combined using

	A.	the bitwise OR operator (\|)
	B.	the logical OR operator (\|\|)
	C.	the bitwise AND operator (&)
	D.	the logical AND operator (&&)

Your Answer: Option

Correct Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

18.

class Boo
{
Boo(String s) { }
Boo() { }
}
class Bar extends Boo
{
Bar() { }
Bar(String s) {super(s);}
void zoo()
{
// insert code here
}
}

which one create an anonymous inner class from within class Bar?

	A.	Boo f = new Boo(24) { };
	B.	Boo f = new Bar() { };
	C.	Bar f = new Boo(String s) { };
	D.	Boo f = new Boo.Bar(String s) { };

Your Answer: Option

Correct Answer: Option B

Explanation:

Option B is correct because anonymous inner classes are no different from any other class when it comes to polymorphism. That means you are always allowed to declare a reference variable of the superclass type and have that reference variable refer to an instance of a subclass type, which in this case is an anonymous subclass of Bar. Since Bar is a subclass of Boo, it all works.

Option A is incorrect because it passes an int to the Boo constructor, and there is no matching constructor in the Boo class.

Option C is incorrect because it violates the rules of polymorphism—you cannot refer to a superclass type using a reference variable declared as the subclass type. The superclass is not guaranteed to have everything the subclass has.

Option D uses incorrect syntax.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

19.

Which option will be used with sort command to start sorting ofter the nth column of the (m+l)th field?

	A.	-m.n
	B.	+m.n
	C.	+ n.m+1
	D.	+(m+l).n
	E.	None of the above

Your Answer: Option

Correct Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

20.

To ensure that every object in the array receives a destructor call, always delete memory allocated as an array with operator __________ .

	A.	destructor
	B.	delete
	C.	delete[]
	D.	kill[]
	E.	free[]

Your Answer: Option

Correct Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

Learn more problems on : Java Programming Test (Random Questions)

Discuss about this problem : Discuss in Forum

Marks :
Total number of questions	:
Number of answered questions	:
Number of unanswered questions	:

Java Programming Test (Random Questions)

Test Review : View answers and explanation for this test.

Questions & Answers

Interviews

Jobs

Results

Admission

Admit Card

Answer Key