Questions

Q:

A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the the bucket. The reading of the spring balance

A) will increase B) will decrease
C) does not change D) varies with the increase of depth of the immersion of the iron piece
 
Answer & Explanation Answer: A) will increase

Explanation:

When the piece of iron is lowered into the water, the water level in the bucket increases. And so the pressure at the bottom of bucket also increases. Thus the total thrust at bottom also increases. Therefore the spring balance reading increases. Thus (a) is correct.

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Filed Under: Physics

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Q:

How have you influenced employees to follow your strategic vision for the organization?

Answer

Tips :


Leaders develop ownership by involving employees in the decision-making and planning process. They provide resources to facilitate employee success and empower employees by devolving authority to get things done efficiently. Effective leaders develop processes that engage employees in achieving the strategic vision. 

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Q:

Describe the Buddy system of memory allocation.

Answer

Free memory is maintained in linked lists, each of equal sized blocks. Any such block is of size 2^k. When some memory is required by a process, the block size of next higher order is chosen, and broken into two. Note that the two such pieces differ in address only in their kth bit. Such pieces are called buddies. When any used block is freed, the OS checks to see if its buddy is also free. If so, it is rejoined, and put into the original free-block linked-list.

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Q:

International Workers' Day or Labour Day is celebrated on ?

A) April 1st B) May 1st
C) June 1st D) July 1st
 
Answer & Explanation Answer: B) May 1st

Explanation:
  • International Workers' Day, also known as Labour Day in some countries, is a celebration of labourers and the working classes that is promoted by the international labour movement, socialists, communists or anarchists. 
  • It occurs every year on May Day which is May 1st. It is the day to pay tribute to the Labourers. Without them nothing will complete. 
  • In India, the first Labour Day, or May Day, was celebrated in 1923 in Chennai.
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Filed Under: Important Days and Years
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank PO

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Q:

In which layer is the pressure the highest?

A) Ionosphere B) Stratosphere
C) Troposphere D) Inner core
 
Answer & Explanation Answer: D) Inner core

Explanation:

"Pressure" is the ratio of mass to area. So, for any given area, the one with more mass pressing on it will experience a higher pressure.

 

As you go more deeply into the atmosphere OR earth itself, you are putting more and more mass over you. For the same unit area therefore, the pressure, (mass/area) increases.

 

Hence, the lowest layer will always have the highest pressure i.e, inner core.

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

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Q:

As per the data released by RBI, which bank witnessed the most number of frauds during April-December period of 2016 ?

A) HDFC Bank B) Standard Chartered Bank
C) SBI Bank D) ICICI Bank
 
Answer & Explanation Answer: D) ICICI Bank

Explanation:

ICICI Bank topped the list of banks that witnessed the most number of frauds during April-December period of 2016 with state-owned SBI taking the second spot, RBI data said.

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Filed Under: General Awareness
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk

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Q:

The Gathering  is written by

A) Winston Churchill B) Voltaire
C) George Washington D) Steven Spielberg
 
Answer & Explanation Answer: A) Winston Churchill

Explanation:
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Filed Under: Books and Authors

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Q:

What are the different Adder circuits you studied?

Answer

Adders are generally of five types:


1.Ripple Carry Adder:


The Ripple carry adder(RCA) consists of a building block named Half Adder(HA) which is cascaded to form a Full Adder(FA). These buildingblocks HAs and FAs are also the building blocks of all types of adders.The n full adders are cascaded to form n bit RCA.


The full adder has three input pins(input Ai,input Bi,carryin Ci) and two output pins(Sum and Ci+1).Its equations are:


Sum=Ai^Bi^Ci


Ci+1=Ai.Bi+Bi.Ci+Ai.Ci


 


2. Carry Lookahead Adder:


The Carry Lookahead Adder(CLA) reduces the delay as that in RCA. Let Gi=Ai.Bi, and Pi=Ai^Bi, then Ci+1=Gi+Pi.Ci.


The expressions for Sum and Ci+1 is then defined completely in terms of input pins rather wait for input carry to appear.


 


3. Carry Select Adder:


The carry select adder uses duplicate modules for each combination of input carry(i.e. 1 and 0).The multiplexers then select the appropriate sum and carry output according to the carry output of the preceding stages.


 


4. Carry Skip Adder:


The carry skip adder are as fast as carry lookahead adders which are the fastest adders but its spped decreases to about 20-30% if input operands are 64-bit or more. In these adders we divide the input bit stream into various blocks and make use of two observations:


-if each element of the two bit streams are unequal,i.e. Ai!=Bi than the carry input of the block is equal to the carry input.


-if each element of the two bit streams are equal,i.e. Ai=Bi than the carry input of the block is opposite of the carry input.


 


5. Carry Save Adder:


The carry save adder reduces the addition of three elements into addition of two elements,i.e. if you want sum of nine numbers it reduces it into sum of six numbers. In first step the sum of three numbers is calculated without bothering for the carry.During the second step only carry is calculated which is then added to the generated sum to give the required sum. 

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Subject: Hardware

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