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 :-).

A binary relationship cannot be which of the following?

	A.	One-to-One
	B.	One-to-Many
	C.	Many-to-Many
	D.	Zero-to-Zero

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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What is the frequency range of the IEEE 802.11g standard?

	A.	2.4Gbps
	B.	5Gbps
	C.	2.4GHz
	D.	5GHz

Your Answer: Option

Correct Answer: Option C

Explanation:

The IEEE 802.11b and IEEE 802.11g standards both run in the 2.4GHz RF range.

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Which of the following is the correct way to create an object of the class Sample?

1 Sample s = new Sample();

2 Sample s;

3 Sample s; s = new Sample();

4 s = new Sample();

	A.	1, 3
	B.	2, 4
	C.	1, 2, 3
	D.	1, 4
	E.	None of these

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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If the two strings are identical, then strcmp() function returns

	A.	-1
	B.	1
	C.	0
	D.	Yes

Your Answer: Option

Correct Answer: Option C

Explanation:

Declaration: strcmp(const char *s1, const char*s2);

The strcmp return an int value that is

if s1 < s2 returns a value < 0

if s1 == s2 returns 0

if s1 > s2 returns a value > 0

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Which of the following statements, is (are) not true for the lease option

	A.	Lease charges are lower than rental charges for the same period and are also tax deductable.
	B.	Lease may be written to show higher payments is early years to reflect the decline in value of the system
	C.	Insurance, maintenance and other expenses are included in the rental charge
	D.	All of the above
	E.	None of the above

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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CASE tools do not include which of the following features?

	A.	Help to draw data models
	B.	Help to generate code
	C.	Help to manage people
	D.	Create an information repository

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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A system program that combines the separately compiled modules of a program into a form suitable for execution

	A.	assembler
	B.	linking loader
	C.	cross compiler
	D.	load and go
	E.	None of the above

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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A rectangle represents which of the following in an ERD?

	A.	Attribute
	B.	Entity
	C.	Optional One
	D.	Relationship

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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In SQL, GRANT command is used to

	A.	allow user to access databases
	B.	allow user to create databases
	C.	grant system privileges, roles, and object privileges to uses and roles
	D.	choose auditing for specific SQL commands
	E.	None of the above

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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10.

IGRP uses which of the following as default parameters for finding the best path to a remote network?

Hop count
MTU
Cumulative interface delay
STP
Path bandwidth value

	A.	1 and 3
	B.	3 and 5
	C.	2, 3 and 5
	D.	All of the above

Your Answer: Option

Correct Answer: Option B

Explanation:

IGRP uses bandwidth and delay of the line, by default, to determine the best path to a remote network. Delay of the line can sometimes be called the cumulative interface delay.

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11.

What is the difference between integral and derivative control?

	A.	derivative control does not eliminate offset error
	B.	integral control has slower response to an error signal.
	C.	derivative control responds to a change in the rate of change in the error signal
	D.	All of the above
	E.	None of the above

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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12.

Which of the following is true when describing a unicast address?

	A.	Packets addressed to a unicast address are delivered to a single interface.
	B.	These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
	C.	These are like private addresses in IPv4 in that they are not meant to be routed.
	D.	These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

Your Answer: Option

Correct Answer: Option A

Explanation:

Packets addressed to a unicast address are delivered to a single interface. For load balancing, multiple interfaces can use the same address.

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13.

To update an SQL view, the DBMS must be able to associate the column(s) to be updated with:

	A.	a particular column in a particular underlying table.
	B.	a particular column in a particular row.
	C.	a particular row in a particular underlying table.
	D.	None of the above is correct.

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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14.

What do the following declaration signify?

void (*cmp)();

	A.	cmp is a pointer to an void function type.
	B.	cmp is a void type pointer function.
	C.	cmp is a function that return a void pointer.
	D.	cmp is a pointer to a function which returns void .

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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15.

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.

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16.

Interprocess communication

	A.	is required for all processes
	B.	is usually done via disk drives
	C.	is never necessary,
	D.	allows processes to synchronize activity

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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17.

Which of the following does not store a sign?

	A.	Short
	B.	Integer
	C.	Long
	D.	Byte
	E.	Single

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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18.

You just installed a new IDE hard drive, but your system BIOS will not recognize the new drive, what should you check first.

	A.	cable sequence
	B.	jumpers on the hard drive
	C.	drivers that need to be loaded
	D.	hard drive manufacturer web site information
	E.	None of the above

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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19.

The FIFO algorithm

	A.	executes first the job that last entered the queue
	B.	executes first the job that first entered the queue
	C.	execute first the job that has been in the queue the longest
	D.	executes first the job with the least processor needs
	E.	None of the above

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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20.

The average time necessary for the correct sector of a disk to arrive at the read write head is _____

	A.	Down time
	B.	Seek time
	C.	Rotational delay
	D.	Access time
	E.	None of the above

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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