Exams Questions and Answers

Q:

The number of ways that 8 beads of different colours be strung as a necklace is

A) 2520	B) 2880
C) 4320	D) 5040

Answer & Explanation Answer: A) 2520

Explanation:

The number of ways of arranging n beads in a necklace is $\frac{(n - 1)!}{2} = \frac{(8 - 1)!}{2} = \frac{7!}{2}$ = 2520

(since n = 8)

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

27 16743

Q:

The main interface in Windows and OS X is __________ interface.

A) Command-line	B) Embedded
C) Neural	D) Graphical

Answer & Explanation Answer: D) Graphical

Explanation:

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Filed Under: Operating Systems
Exam Prep: Bank Exams
Job Role: Analyst , Bank Clerk , IT Trainer

52 16732

Q:

Profit after tax for any year = profit of that year - tax of that year

Tax on any year = tax rate of that year x profit of the year

Which of the following is correct about profit after tax for year Y2, Y6 and Y8?

A) Y8 > Y6 = Y2	B) Y6 > Y2 > Y8
C) Y8 > Y6 > Y2	D) Y6 = Y8 > Y2

Answer & Explanation Answer: C) Y8 > Y6 > Y2

Explanation:

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Filed Under: Table Charts
Exam Prep: Bank Exams

0 16729

Q:

In the following question, select the missing number from the given series.

8, 16, ?, 64, 128

A) 30	B) 32
C) 28	D) 48

Answer & Explanation Answer: B) 32

Explanation:

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Filed Under: Number Series
Exam Prep: Bank Exams

4 16726

Q:

How many cubes of 10cm edge can be put in a cubical box of 1m edge

A) 10	B) 100
C) 1000	D) 10000

Answer & Explanation Answer: C) 1000

Explanation:

Number of cubes= (100x100x100) / (10x10x10)= 1000

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams
Job Role: Bank PO

45 16717

Q:

In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples ?

A) 6/7	B) 19/21
C) 7/31	D) 5/21

Answer & Explanation Answer: D) 5/21

Explanation:

Number of ways of (selecting at least two couples among five people selected) = (⁵C₂ x ⁶C₁)

As remaining person can be any one among three couples left.

Required probability = (⁵C₂ x ⁶C₁)/¹⁰C₅
= (10 x 6)/252 = 5/21

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Filed Under: Probability
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

12 16691

Q:

A periscope works by the principle of

A) Total internal reflection	B) Refraction
C) Diffraction	D) Reflection & Refraction

Answer & Explanation Answer: A) Total internal reflection

Explanation:

A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube.

per11526634345.jpg image

Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye.

Hence, A periscope works by the principle of Total internal reflection.

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Filed Under: Physics
Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

38 16687

Q:

Refer the below data table and answer the following question.

What is the value of total stock in lakh rupees?

A) 851.4	B) 114
C) 378	D) 85.14

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