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Practice Questions & Answers :: Cocubes

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Tot. Mock Test: 73+


Tot. Exam. Sec.: 5+


Total Practice Qs: 137+

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The term responsivity as it applies to a light detector is best described as


Athe time required for the signal to go from 10 to 90 percent of maximum amplitude

Bthe ratio of the diode output current to optical input power

Cthe ratio of output current to output power

Dthe ratio of output current to input current

Answer: Option B

Explanation:

Responsivity measures the input–output gain of a detector system. In the specific case of a photodetector, responsivity measures the electrical output per optical input.

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11
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42 / 137

Choose the correct option.

Statements:
Wind is an inexhaustible source of energy and an aerogenerator can convert it into electricity. Though not much has been done in this field, the survey shows that there is vast potential for developing wind as alternative source of energy.

Conclusions:
I. Energy by wind is comparatively newly emerging field.
II. The energy crisis can be dealt by exploring more in the field of aero-generation.


AOnly conclusion I follows

BOnly conclusion II follows

CEither I or II follows

DNeither I nor II follows

EBoth I and II follow

Answer: Option E

Explanation:

The phrase 'not much has been done in this field' indicates that wind energy is a comparatively newly emerging field. So, I follows. The expression 'there is vast potential for developing wind as alternative source of energy' proves II to be true.

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14
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43 / 137

Choose the correct option.

Statements:
Company X has marketed the product. Go ahead; purchase it if price and quality are your considerations.

Conclusions:
I. The product must be good in quality.
II. The price of the product must be reasonable.


AOnly conclusion I follows

BOnly conclusion II follows

CEither I or II follows

DNeither I nor II follows

EBoth I and II follow

Answer: Option E

Explanation:

It is mentioned in the statement that one who considers price and quality before buying a product should buy the product of company X. So, both I and II follow.

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2
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44 / 137

Choose the correct option.

Statements:
The Government of country X has recently announced several concessions and offered attractive package tours for foreign visitors.

Conclusions:
I. Now, more number of foreign tourists will visit the country.
II. The Government of country X seems to be serious in attracting tourists.


AOnly conclusion I follows

BOnly conclusion II follows

CEither I or II follows

DNeither I nor II follows

EBoth I and II follow

Answer: Option C

Explanation:

Clearly, the government has taken the step to attract more tourists. So, both I and II follow.

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SHSTTON
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45 / 137

Choose the correct option.

Statements:
For over three decades Company X has been totally involved in energy conservation, its efficient use and management.

Conclusions:
I. The Company has yet to learn and acquire basic things in this area.
II. It is dedication that is more important than knowledge and expertise


AOnly conclusion I follows

BOnly conclusion II follows

CEither I or II follows

DNeither I nor II follows

EBoth I and II follow

Answer: Option D

Explanation:

Since the company has been working in this area for three decades, it must have the necessary expertise and infrastructure required in this field. So, I does not follow. However, the qualities that have made the Company X successful in this field have not been mentioned. So, II also does not follow.

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4
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46 / 137

Choose the conclusion which logically follows from the given statement(s).

Soldiers serve their country.


AThose who serve their country are soldiers.

BMen generally serve their country.

CWomen do not serve their country because they are not soldiers.

DSome men who are soldiers serve their country.

Answer: Option D

Explanation:

Here is no explanation for this answer

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SHSTTON
2
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47 / 137

Choose the conclusion which logically follows from the given statement(s).

Hitesh told Mohit a ghost lived by the peepal tree on the outskirts of the village.


AGhosts live on peepal trees.

BPeepal trees grow on the outskirts of the village

CMohit must be afraid of ghosts.

DHitesh perhaps believed in the stories of ghosts

Answer: Option C

Explanation:

Here is no explanation for this answer

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SHSTTON
105
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100
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205
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48 / 137

Choose the correct option.

Both Dynamic array and Dynamically memory allocated array are same.


ATRUE

BFALSE

 View Answer |  Submit Your Solution | Topic: Arrays | Asked In Cocubes |

Answer: Option B

Explanation:

Physical size of a Dynamic array is fixed with a larger value. Dynamically memory allocated arrays are arrays whose memory is allocated at run time rather than at compile time. Dynamically memory allocated arrays don’t have physical size at the backend. Thus, Dynamic arrays and Dynamically memory allocated arrays are different.

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82
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Choose the correct option.

What is the time complexity for inserting/deleting at the beginning of the array?


AO(nlogn)

BO(1)

CO(n)

DO(logn)

 View Answer |  Submit Your Solution | Topic: Arrays | Asked In Cocubes |

Answer: Option C

Explanation:

All the other elements will have to be moved, hence O(n).

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126
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50 / 137

Choose the correct option.

When do you use a sparse array?


AWhen elements are sorted

BWhen there are unique elements in the array

CWhen the array has more occurrence of zero elements

DWhen the data type of elements differ

 View Answer |  Submit Your Solution | Topic: Arrays | Asked In Cocubes |

Answer: Option C

Explanation:

It need not necessarily be zero, it could be any default value, usually zero or null.

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