Technical Questions

Q:

A shared database should:

A) be accurate and available. B) provide for backup and recovery.
C) be secure. D) All of the above.
 
Answer & Explanation Answer: D) All of the above.

Explanation:
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Filed Under: Database

3 5678
Q:

A ternary relationship involves how many entities?

A) 3 or less B) 3
C) More than 3 D) 3 or more
 
Answer & Explanation Answer: B) 3

Explanation:
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Filed Under: Database

0 5672
Q:

Which of the following indicates the maximum number of entities that can be involved in a relationship?

A) Minimum cardinality B) Maximum cardinality
C) ERD D) Greater Entity Count (GEC)
 
Answer & Explanation Answer: B) Maximum cardinality

Explanation:
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Filed Under: Database

1 5582
Q:

Point out the error, if any, in the following program.

#include "stdarg.h"

main()

{

     display ( 4, 12.5, 13.5, 14.5, 44.3);

}

display(int num, ...)

{

       float c; int j;

        va_list ptr;

        va_start (ptr, num);

        for ( j = 1; j <= num; j++)

        {

            c = va_arg ( ptr, float );

            printf ("\n%f", c);

         }

}

Answer

While extracting a float argument using va_arg we should have useed 


c = va_arg (ptr, double)

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Subject: Programming

1 5538
Q:

What are the different hazards? How do you avoid them?

Answer

There are situations, called hazards, that prevent the next insturction in the instruction stream from executing during its designated clock cycle. hazards reduce the performance from the ideal speedup gained by pipelining.


There are three classes of Hazards:


1. Structural hazards: It arise from resource conficts when the hardware cannot support all possible combinations of instructions simultaniously in overlapped execution.


2. Data Hazards: It arise when an instruction depends on the results of previous instruction in a way that is exposed by the overlapping of instructions in the pipeline.


3.control hazards. it arise from the pipelining of branches and other instructions that chage the PC.

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Subject: Hardware

12 5515
Q:

Which of the following is not a common network topology?

A) Cluster B) Bus
C) Ring D) Star
 
Answer & Explanation Answer: A) Cluster

Explanation:

A network is nothing but 2 or more computers are grouped together to share information and resources and the that arrangement is called a topology.

which_of_the_following_is_not_a_common_network_topology1536650677.gif image

Cluster network topology is not a common type.

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Filed Under: Networking
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7 5498
Q:

By default, a Linux user falls under which group?

A) same as userid (UPG) B) system
C) staff D) others
 
Answer & Explanation Answer: A) same as userid (UPG)

Explanation:

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel. By default, a Linux user falls under same as userid (UPG) group.

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47 5479
Q:

A collection of interrelated records is called a

A) Datasheet B) Spreadsheet
C) Database D) Utility File
 
Answer & Explanation Answer: C) Database

Explanation:
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5 5471