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Q:

The number of ways that 7 teachers and 6 students can sit around a table so that no two students are together is 

A) 7! x 7! B) 7! x 6!
C) 6! x 6! D) 7! x 5!
 
Answer & Explanation Answer: B) 7! x 6!

Explanation:

The students should sit in between two teachers. There are 7 gaps in between teachers when they sit in a roundtable. This can be done in 7P6ways. 7 teachers can sit in (7-1)! ways.

 

 Required no.of ways is = 7P6.6! = 7!.6!

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Filed Under: Permutations and Combinations
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

Q:

If 'A $ B' means 'A is brother of B', 'A @ B'means 'A is wife of B', 'A # B' means 'A is daughter of B' and 'A & B'means 'A is father of B', then which of the following expressions indicates the relationship 'K' is father-in-law of H'? 

 

A) H @ J $ L # P & K B) H @ J $ P & L # K
C) H @ J $ L # K & P D) H @ P $ J & L # K
 
Answer & Explanation Answer: C) H @ J $ L # K & P

Explanation:

K is the father-in-law of H means H is the wife of the brother (say, J) of the daughter (say, L) of K and K is a male (brother or father of some person, say P) i.e H @ J $ L # K $ P or H @ J $ L # K & P.

 

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Filed Under: Blood Relations

Q:

Which of the following soils is formed under typical monsoonal conditions?

A) Black Soils B) Red Soils
C) Laterite Soils D) None
 
Answer & Explanation Answer: C) Laterite Soils

Explanation:

The alternation of wet and dry seasons leads to the leaching away of the siliceous matter of the rocks and the formation of laterite soils. It has been observed that there is a general relationship between altitude and the chemical composition of laterite soils. The soils on the higher areas are generally more acidic than on the low lying areas.

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Filed Under: Indian Geography

Q:

Which of the following groups of rivers in india are likely to show the least erosional activity?

A) Himalayan rivers B) Those rising in the Great Plain of India
C) The thin streams flowing into the Arabian Sea D) The east-ward flowing peninsular rivers
 
Answer & Explanation Answer: D) The east-ward flowing peninsular rivers

Explanation:

The rivers are arranged in the descending order of their erosional activity.

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Filed Under: Indian Geography

Q:

What characteristic of read-only memory (ROM ) makes it useful?

A) ROM informationcan be easily updated B) Data in ROM is non volatile, that is, it remains there even without electrical power
C) ROM provides very large amounts of inexpensive data storage D) ROM chips are easily swapped between different brands of computers
 
Answer & Explanation Answer: B) Data in ROM is non volatile, that is, it remains there even without electrical power

Explanation:
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Filed Under: Computer

Q:

Which of the following menu types is also called a drop down menu?

A) fly-out B) cascading
C) pop-up D) pull-down
 
Answer & Explanation Answer: D) pull-down

Explanation:
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Filed Under: Computer

Q:

Which of the following software applications would be the most appropriate for performing numerical and statistical calculations?

A) Database B) Document Processor
C) Graphic Package D) Spread Sheet
 
Answer & Explanation Answer: D) Spread Sheet

Explanation:
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Filed Under: Computer

Q:

The mode of nutrition in which particulate food is devoured is 

A) holozoic B) holophytic
C) saprophytic D) parasitic
 
Answer & Explanation Answer: A) holozoic

Explanation:

The feeding mechanism is of several types.If it is entirely plant-like (photosynthesis), it is called holophytic. It is entirely (holo) animal-like(zoic),that is devouring alreadyexisting food, it is called holozoic

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Filed Under: Biology