Explore topic-wise InterviewSolutions in .

1. (b) easy

2. (c) different

3. (d) Annoy

4. (a) narrower

5. (a) temporarily

Correct option is C) reading

Correct option is C) was not / die

Yes. 

She felt that the study of Sanskrit can help her break into a field that was not possible for her to enter on grounds of gender and caste. As she proceeds with her studies, she meets with varied reactions ranging from surprise to hostility, from guarded acceptance to brutal rejection

Correct option is A) I,V,IV,III,II

Correct option is E) 4,5,1,2,3

• 4 times President's rule has been imposed in the State of Rajasthan till 30th June, 2016.
• 1. March 1967 to April 1967
• 2. April 1977 to June 1977
• 3. Fab 1980 to June 1980
• 4. Dec 1992 to Dec 1993

Correct option is B) empty

Correct option is B) 3,1,2,5,4

Correct option is A) cheapest / less

Correct option is B) finished

Correct option is C) lasted

Correct option is D) started

*Human evolution took place in time period of about 7 crore years. According to this concept the journey of human evolution is as follows:

(1) Approximately around 7 crore years back the ice age began on the earth. In such conditions, dinosaurs became extinct. The evolution and diversity of mammals started during this time. Due to change in climate the forest cover also declined rapidly

(2) Ancestors of monkey-like animals were Lemur like animals which evolved during this time period

(3) The tails of these monkey-like creatures started vanishing very gradually around 4 crore years ago

(4) The body and brain both increased in volume forming first ape like animals. The monkey like ancestors gave rise to two evolutionary links to apes and human like animals

(5) Later, the human evolution took place by changes in the brain volume, the ability to walk upright, excessive use of hand for manipulations

(6) This journey of human evolution began 7 crore years ago. But the true wise and intelligent man arose around 50,000 years ago.

The Correct option is B. π rad

(d) Most of the energy in incident light is used in emission of photoelectron

Correct option is (1) 2 x 10⁶ Hz

KE = hv - hv_th

For minimum frequency KE = 0

vh = hv_th

v = v_th

Correct answer is (x ∝ I/T - T_c) 

Para: x ∝ I/T

Ferro turns to para after curie' s temp.  

and then (x ∝ I/T - T_c) 

The functions of money are broadly classified as follows: 

1. Primary functions 

2. Secondary functions 

3. Contingent functions.

1. Primary functions: The primary functions of money are as follows:

a. Medium of exchange: Money plays an important role as a medium of exchange. It facilitates exchange of goods for money. It has solved the problems of barter system. Barter exchanges become extremely difficult in a large economy because of the high costs people would have to incur looking for suitable persons to exchange their surpluses.

It helps the people to sell in one place and buy in another place. Money has widened the scope of market transactions. Money has become a circulating material between buyers and sellers.

b. Measure of value: The money acts as a common measure of value. The values of all goods and services can be expressed in terms of money. As a measure of value, money performs following functions:

• The value of all goods and services measured and expressed in terms of the money. 
• Rate of exchange of goods and services expressed in money. 
• Facilitates the maintenance of accounts. 
• It facilitates price mechanism. 
• It makes goods and services comparable in terms of price.

For instance, when we say that the value of a book is Rs.500, we mean that the book can be exchanged for 500 units of money where a unit of money is rupee in this case. If the price of a pencil is Rs.5 and that of a pen is Rs.10, we can calculate the relative price of a pen with respect to a pencil i.e., a pen is worth 10/5 = 2 pencils.

2. Secondary functions: The secondary functions of money are as follows:

a. Store of value: People can save part of their present income and hold the same for future. Money can be stored for precautionary motives needed to overcome financial stringencies. Money solves one of the deficiencies of barter system i.e., difficulty to carry forward one’s wealth under the barter system.

For instance, we have an endowment of wheat which we do not wish to consume today entirely. We may regard this stock of surplus wheat as an asset which we may wish to consume or even sell-off, for acquiring other commodities at some future date. But wheat is a perishable item and cannot be stored beyond a certain period.

Also, holding a large stock of wheat requires a lot of space. We may have to spend considerable time and resources looking for people with a demand for wheat when we wish to exchange our stock for buying other commodities. This problem can be solved if we sell our wheat for money. Money is not perishable land its storage costs are also less.

b. Standard of deferred payments: All the credit transactions are expressed in terms of money. The payment can be delayed or postponed. So, money can be used for delayed settlement of dues or financial commitments.

c. Transfer of value: Money acts as a transfer of value from person to person and from place to place. As a transfer of value, money helps us to buy goods, properties or anything from any part of the country or the world. Further, money earned in different places can be brought or transferred to anywhere in the world.

3. Contingent functions of money: Other than primary and secondary functions, money also performs other functions which are as follows:

a. Basis of credit: Money serves as a basis of the credit. The modem credit system exists only because of existence of money.

b. Distribution of national income: Money helps in distribution of national income. The reward paid to factors of production in the form of rent, wages, interest and profit are nothing but the distribution of national income at factor prices.

c. Provides liquidity and uniformity: Money provides liquidity to all kinds of assets both moveable and immovable. Money can be. converted into any type of asset and all assets can be converted into money.

d. Helps, in consumers’ and producers’ equilibrium: All goods and services are expressed in terms of money. The consumer attains equilibrium when the price of a product is equal to his marginal utility. Similarly, the producers reach equilibrium if they get maximum satisfaction. Both consumers and producers try to achieve equilibrium with the help of money.

Given, a convex mirror,

u = -20 cm ; f = 30cm

By mirror formula, 1/f = 1/v + 1/u, 

we get v = +12 cm

Height of object = 3 cm

Let height of image = x

-v/u = x/3

-12/20 = x/3

x = 9/5

Therefore, position of object is 12 cm (behind the mirror)

Nature of object is virtual

Size of object = 9/5 cm

This solution is strictly for practice purposes, do not use it during examinations.

The upper answer is correct

If lens is cut along the principal axis then there will be no change in the focal length of lens. but it is cut perpendicular to principal axis, then focal length will be twice the original one.

Optical and radio waves can penetrate the atmosphere whereas x- rays being of much smaller wavelength are absorbed by the atmosphere. That is why we can work with optical and radio telescopes on earth’s surface, but x- ray astronomical telescopes must be used on the satellite orbiting above the earth’s atmosphere.

It was originated in India around 1500 years ago and was a positional number system with symbol for zero. This greatest contribution is adopted by many of the countries.

Abacus was the first computer for basic arithmetic calculations.

1. First generation computers (1940 – 1956):

Vacuum tubes were used in first generation computers. The input was based on punched cards and paper tapes and output was displayed on printouts. The Electronic Numerical Integrator and Calculator(ENIAC) belongs to first generation was was the first general purpose programmable electronic computer built by J. Presper Eckert and John V. Mauchly.

It was 30 – 50 feet long, weight 30 tons, 18,000 vacuum tubes, 70,000 registers, 10,000 capacitors and required 1,50,000 watts of electricity. It requires Air Conditioner. They later developed the first commercially Successful computer, the Universal Automatic Computer(UNIVAC) in 1952. 

The mathematician John Von Neumann designed a computer structure that structure is in use nowadays. Von Neumann structure consists of a central processing unit (CPU), Memory unit, Input and Output unit. 

The CPU consists of arithmetic logical unit(ALU) and control unit(CU). The instructions are stored in the memory and follows the “Stored Program Concept”.

Colossus is the secret code breaking computer developed by a British engineer Tommy Flowers in 1943 to decode German messages.

2. Second generation computers (1956 -1963):

 Transistors, instead of Vacuum tubes, were used in 2nd generation computers hence size became smaller, less expensive, less electricity consumption and heat emission and more powerful and faster. A team contained John Bardeen, Walter Brattain and William Shockley developed this computer at Bell Laboratories. 

In this generation onwards the concept of programming language was developed and used magnetic core (primary) memory and magnetic disk(secondary) memory. 

These computers used high level languages(high level language means English like statements are used) like FORTRAN (Formula translation) and COBOL(Common Business Oriented Language). The popular computers were IBM 1401 and 1620. 

3. Third generation computers (1964 – 1971):

Integrated Circuits(IC’s) were used. IC’s or silicon chips were developed by Jack Kilby, an engineer in Texas Instruments. It reduced the size again and increased the speed and efficiency. The high level language BASIC(Beginners All purpose Symbolic Instruction Code) was developed during this period The popular computers were IBM 360 and 370.

Due to its simplicity and cheapness more people were used . The number of transistors on IC’s doubles approximately every two years. This law is called Moore’s Law, it is named after Gordon E Moore. It is an observation and not a physical or natural law. 

4. Fourth generation computers (1971 onwards): 

Microprocessors are used hence computers are called microcomputers. Microprocessor is a single chip which contains Large Scale of IC’s(LSI) like transistors, capacitors, resistors etc due to this a CPU can place on a single chip. Later LSI were replaced by Very Large Scale Integrated Circuits(VLSI). The popular computers are IBM PC and Apple II.

5. Fifth generation computers (future):

Fifth generation computers are based on Artificial Intelligence(AI). AI is the ability to act as human intelligence like speech recognition, face recognition, robotic vision and movement etc. The most common Al programming language are LISP and Prolog.

The Turing test is a test of a machine’s ability to exhibit intelligent behaviour equivalent to, or indistinguishable from, that of a human. The test involves a human judge engages in natural language conversations with a human and a machine designed to generate performance indistinguishable from that of a human being.

All participants are separated from one another. If the judge cannot reliably tell the machine from the human, the machine is said to have passed the test. The test does not check the ability to give the correct answer to questions; it checks how closely the answer resembles typical human answers. Turing predicted that by 2000 computer would pass the test.

Around 3000 BC Egyptians introduced a number system with base 10. They used unique symbols for 1 to 9, 10 to 90, 100 to 900 and 1000 to 9000. They write from right to left. The next era was of Sumerian/Babylonian number system its base was 60, the largest base also known as sexagesimal system.

They write from left to right. They use blank space for zero. Around 2500 BC Chinese introduced simplest and the most efficient number system. Its base was 10.

• 3 beads of the leftmost rod moved hence it represents 3. 
• No beads (0) of the next rod moved hence it represents 0. 
• 2 beads of the rightmost rod in the lower part is moved (2+) and one bead is moved in the upper part represents 5.

Hence 2 + 5 = 7 

So the answer is 307

Vaccum tubes were used in first generation computers. Hence the size of computer was a size of full room. Instead of vaccum tubes transistors were used in the 2^nd generation hence size became smaller. In 3^rd generation, Integgted circuits (IC’s) were used. It reduced the size again in 4^th generation, microprocessors are used. It reduces the size again and again.

• Transistor – Second generation 
• VLSI – Fourth generation 
• ENIAC – First generation

Mark 1 is the first automatic electromechanical computer

In 3000 BC Mesopotamians introduced this and it means calculating board or frame. It is considered as the first computer for basic arithmetical calculations and consists of beads on movable rods divided into two parts.

The Chinese improved the Abacus with seven beads on each wire. A horizontal divider separates the top two beads from the bottom five. The top two beads have a place value of 5 and the below five beads. The beads which are pushed against the horizontal bar represent the number.