C Programming Test (Random Questions)

C 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 valid host range for the subnet on which the IP address 192.168.168.188 255.255.255.192 resides?

	A.	192.168.168.129-190
	B.	192.168.168.129-191
	C.	192.168.168.128-190
	D.	192.168.168.128-192

Your Answer: Option

Correct Answer: Option A

Explanation:

256 - 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast address is 191, and the valid host range is the numbers in between, or 129-190.

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VAn autonomous homogenous environment is which of the following?

	A.	The same DBMS is at each node and each DBMS works independently.
	B.	The same DBMS is at each node and a central DBMS coordinates database access.
	C.	A different DBMS is at each node and each DBMS works independently.
	D.	A different DBMS is at each node and a central DBMS coordinates database access.

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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Which is true about a method-local inner class?

	A.	It must be marked final.
	B.	It can be marked abstract.
	C.	It can be marked public.
	D.	It can be marked static.

Your Answer: Option

Correct Answer: Option B

Explanation:

Option B is correct because a method-local inner class can be abstract, although it means a subclass of the inner class must be created if the abstract class is to be used (so an abstract method-local inner class is probably not useful).

Option A is incorrect because a method-local inner class does not have to be declared final (although it is legal to do so).

C and D are incorrect because a method-local inner class cannot be made public (remember-you cannot mark any local variables as public), or static.

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The keyword used to transfer control from a function back to the calling function is

	A.	switch
	B.	goto
	C.	go back
	D.	return

Your Answer: Option

Correct Answer: Option D

Explanation:

The keyword return is used to transfer control from a function back to the calling function.

Example:


#include<stdio.h>
int add(int, int); /* Function prototype */

int main()
{
    int a = 4, b = 3, c;
    c = add(a, b);
    printf("c = %d\n", c);
    return 0;
}
int add(int a, int b)
{
/* returns the value and control back to main() function */
   return (a+b);
}

Output:
c = 7

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Which of the following is used to make an abstract class?

	A.	Declaring it abstract using static keyword.
	B.	Declaring it abstract using virtual keyword.
	C.	Making at least one member function as virtual function.
	D.	Making at least one member function as pure virtual function.

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 should be used to implement a 'Has a' relationship between two entities?

Your Answer: Option

Correct Answer: Option C

Explanation:

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

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Which of the following protocols support VLSM, summarization, and discontiguous networking?

RIPv1
IGRP
EIGRP
OSPF
BGP
RIPv2

	A.	1 and 4
	B.	2 and 5
	C.	3, 4 and 6
	D.	All of the above

Your Answer: Option

Correct Answer: Option C

Explanation:

RIPv1 and IGRP are true distance-vector routing protocols and can't do much, really-except build and maintain routing tables and use a lot of bandwidth! RIPv2, EIGRP, and OSPF build and maintain routing tables, but they also provide classless routing, which allows for VLSM, summarization, and discontiguous networking.

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SQL data definition commands make up a(n) ________ .

	A.	DDL
	B.	DML
	C.	HTML
	D.	XML

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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What is the purpose of flow control?

	A.	To ensure that data is retransmitted if an acknowledgment is not received.
	B.	To reassemble segments in the correct order at the destination device.
	C.	To provide a means for the receiver to govern the amount of data sent by the sender.
	D.	To regulate the size of each segment.

Your Answer: Option

Correct Answer: Option C

Explanation:

Flow control allows the receiving device to control the transmitter so the receiving device's buffer does not overflow.

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10.

A program language:

	A.	defines the form of the instruction
	B.	is always machine dependent
	C.	is never machine dependent
	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.

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11.

What is the widest valid returnType for methodA in line 3?

public class ReturnIt
{
returnType methodA(byte x, double y) /* Line 3 */
{
return (long)x / y * 2;
}
}

	A.	int
	B.	byte
	C.	long
	D.	double

Your Answer: Option

Correct Answer: Option D

Explanation:

However A, B and C are all wrong. Each of these would result in a narrowing conversion. Whereas we want a widening conversion, therefore the only correct answer is D. Don't be put off by the long cast, this applies only to the variable x and not the rest of the expression. It is the variable y (of type double) that forces the widening conversion to double.

Java's widening conversions are:

- From a byte to a short, an int, a long, a float, or a double.

- From a short, an int, a long, a float, or a double.

- From a char to an int, a long, a float, or a double.

- From an int to a long, a float, or a double.

- From a long to a float, or a double.

- From a float to a double.

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12.

Of the three ways to pass arguments to functions, only passing by _____ and passing by _____ allow the function to modify the argument in the calling program

	A.	reference, pointer
	B.	array, location
	C.	array, pointer
	D.	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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13.

Which statement describes a spanning-tree network that has converged?

	A.	All switch and bridge ports are in the forwarding state.
	B.	All switch and bridge ports are assigned as either root or designated ports.
	C.	All switch and bridge ports are in either the forwarding or blocking state.
	D.	All switch and bridge ports are either blocking or looping.

Your Answer: Option

Correct Answer: Option C

Explanation:

Convergence occurs when all ports on bridges and switches have transitioned to either the forwarding or blocking states. No data is forwarded until convergence is complete. Before data can be forwarded again, all devices must be updated.

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14.

The [Serializable()] attribute gets inspected at

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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15.

Eliminating modification anomalies is a(n) ________ of normalization.

	A.	advantage
	B.	disadvantage
	C.	either an advantage or disadvantage
	D.	neither an advantage nor disadvantage

Your Answer: Option

Correct Answer: Option A

Explanation:

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

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16.

The radian of a number system

	A.	Is variable
	B.	Has nothing to do with digit position value
	C.	Equals the number of its distinct counting digits
	D.	Is always an even number
	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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17.

Declare the following statement? "An array of three pointers to chars".

	A.	char *ptr[3]();
	B.	char *ptr[3];
	C.	char (*ptr[3])();
	D.	char **ptr[3];

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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18.

A constructor that accepts __________ parameters is called the default constructor.

	A.	one
	B.	two
	C.	no
	D.	three

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 statements is correct about the C#.NET code snippet given below?

class Trial
{
int i;
Decimal d;
}
struct Sample
{
private int x;
private Single y;
private Trial z;
}
Sample ss = new Sample();

	A.	ss will be created on the heap.
	B.	Trial object referred by z will be created on the stack.
	C.	z will be created on the heap.
	D.	Both ss and z will be created on the heap.
	E.	ss will be created on the stack.

Your Answer: Option

Correct Answer: Option E

Explanation:

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

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20.

Which of the following condition is used to transmit two packets over a medium at the same time?

Your Answer: Option

Correct Answer: Option B

Explanation:

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

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