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 not a logical data-base structure?

	A.	tree
	B.	relational
	C.	network
	D.	chain
	E.	All 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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Which of the following is a graphical input device?

	A.	light pen
	B.	keyboard
	C.	mouse
	D.	Track ball
	E.	None of the above

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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Which of the following statements is correct?

	A.	There is one garbage collector per program running in memory.
	B.	There is one common garbage collector for all programs.
	C.	An object is destroyed by the garbage collector when only one reference refers to it.
	D.	We have to specifically run the garbage collector after executing Visual Studio.NET.

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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A foreign key is:

	A.	a column containing the primary key of another table.
	B.	used to define data types.
	C.	used to define null status.
	D.	all of the above are above correct.

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?

Switch
NIC
Hub
Repeater
RJ45 transceiver

	A.	1 only
	B.	1 and 3
	C.	3 and 4
	D.	5 only

Your Answer: Option

Correct Answer: Option C

Explanation:

Not that you really want to enlarge a single collision domain, but a hub (multiport repeater) will provide this for you.

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A transaction manager is which of the following?

	A.	Maintains a log of transactions
	B.	Maintains before and after database images
	C.	Maintains appropriate concurrency control
	D.	All 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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Which of the following are loaded into main memory when the computer is booted?

	A.	internal command instructions
	B.	external command instructions
	C.	utility programs
	D.	word processing instructions
	E.	None of the above

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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Which of the following unary operators can be overloaded?

1 true

2 false

3 +

4 new

5 is

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

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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While using the DIR command, you can use certain switches with it. Which one of the following cannot be used with DIR?

	A.	/P
	B.	/W
	C.	/S
	D.	/T
	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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10.

The DBMS that is most difficult to use is ________ .

	A.	Microsoft's SQL Server
	B.	Microsoft's Access
	C.	IBM's DB2
	D.	Oracle Corporation's Oracle

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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11.

Which of the following statements are correct about a delegate?

1 Inheritance is a prerequisite for using delegates.

2 Delegates are type-safe.

3 Delegates provide wrappers for function pointers.

4 The declaration of a delegate must match the signature of the method that we intend to call using it.

5 Functions called using delegates are always late-bound.

	A.	1 and 2 only
	B.	1, 2 and 3 only
	C.	2, 3 and 4 only
	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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12.

Dynamic Host Configuration Protocol [DHCP]

	A.	is the same as bootp
	B.	uses static allocation of IP addresses
	C.	helps prevent conflicts between assigned IP addresses
	D.	assigns IP addresses, which when allocated, cannot be reused
	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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13.

In an intrinsic semiconductor, the number of free electrons

	A.	Equals the number of holes
	B.	Is less than the number of holes
	C.	Is greater than the number of holes
	D.	Impossible to say
	E.	None of the above

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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14.

Assume class B is inherited from class A. Which of the following statements is correct about construction of an object of class B?

	A.	While creating the object firstly the constructor of class B will be called followed by constructor of class A.
	B.	While creating the object firstly the constructor of class A will be called followed by constructor of class B.
	C.	The constructor of only class B will be called.
	D.	The constructor of only class A will be called.
	E.	The order of calling constructors depends upon whether constructors in class A and class B are private or public.

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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15.

A relation is in this form if it is in BCNF and has no multivalued dependencies:

	A.	second normal form.
	B.	third normal form.
	C.	fourth normal form.
	D.	domain/key normal form.

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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16.

A C++ program contains a function with the header int function(double d, char c). Which of the following function headers could be used within the same program?

	A.	char function(double d, char c)
	B.	int function(int d, char c)
	C.	both (a) and (b)
	D.	neither (a) nor (b)

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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17.

The principle of locality of reference justifies the use of

	A.	reenterable
	B.	non reusable
	C.	virtual memory
	D.	cache memory
	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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18.

Fragmentation of the file system

	A.	occurs only if the file system is used improperly
	B.	can always be prevented
	C.	can be temporarily removed by compaction
	D.	is a characteristic of all file systems
	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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19.

Which of the following function declaration is/are incorrect?

	A.	int Sum(int a, int b = 2, int c = 3);
	B.	int Sum(int a = 5, int b);
	C.	int Sum(int a = 0, int b, int c = 3);
	D.	Both B and C are incorrect.
	E.	All are correct.

Your Answer: Option

Correct Answer: Option D

Explanation:

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

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20.

What is the maximum distance with maximum data rate for 802.11a?

	A.	About 65-75 feet
	B.	About 90-100 feet
	C.	About 150 feet
	D.	Over 200 feet

Your Answer: Option

Correct Answer: Option A

Explanation:

The IEEE 802.11a standard provides a maximum data rate of up to 54Mbps, but you need to be close to the access point, somewhere around 65 to 75 feet.

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