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Answer : Rain Or Snowfall Is The Source Of Water.

Answer : (4) 1

Explanation :  Let , the correlation coefficient, r, and  the coefficient of determination, r 2

∴ r = (6 × 3075 − 57 × 225 ) / (√ 6 × 729 − (57)²) (√ 6 × 13125 − (225) ²)

∴ r = 5625 / √ 1125 √28125

∴ r² = 31640625/31640625

∴ r² = 1

∴ r = 1

Answer :- 1) .Peripheral device are the computer devices that are connected to the computer externally such as printer, scanner, keyboard, mouse, tape device, microphone and external modem.  2) They can be internal such as CD-ROM or internal modem and external as the scanner, printer and Zip drive.

3)  Peripheral devices can be classified according to their functions.

a) Input

Input devices are the type of the computer devices that are used to provide the control signals to the computer.  Keyboard and the Mouse are the examples of the input devices.

b) Output

Output devices are the devices that are used to display the results.  Printer, scanner, speaker and the monitor are the examples of the output devices.

c) Storage

A storage device is a device that is used to store the information such as hard disk drive, flash drive, floppy disk and the tape drive.

Answer :- 1) Excess-3 binary-coded decimal (XS-3) or Stibitz code, also called biased representation or Excess-N.

2) It is a complementary BCD code and numeral system used on some older computers that uses a pre-specified number N as a biasing value.

3) It is a way to represent values with a balanced number of positive and negative numbers. 

4) In XS-3, numbers are represented as decimal digits, and each digit is represented by four bits as the BCD value plus 3 (the "excess" amount):

a) The smallest binary number represents the smallest value. (i.e. 0 − Excess Value)

b) The greatest binary number represents the largest value. (i.e. 2 N+1 − Excess Value − 1)

5)It is a code in which decimal digits are represented by the binary equivalent of three greater than the number.

6) Example The excess-3 code representation of 6 is 1001.

Answer :-

1) In the if - else, first the condition is verified,then it  comes to else whereas in the switch - case first it checks the cases and then it Switches to that particular case.

2) If-else can have values based on constraints  where Switch can have values based on user choice.

3) If-else implements Linear search, where as Switch implements Binary search.

4) the Switch is expansion of the else if.when we using the else if it will check all condition but the switch match the case and it will break from the switch where else if can contain any type of condition but the switch must contain same data type cases.

Answer : Difference Between SRAM and DRAM As Follows :-

SRAM 

1. SRAM Stands For Static Random Assessable Memory.

2.Stores bits in memory cells composed of flip flops.

3.Each cell which can store a single bit requires six transistors.

4.Does not need to be refreshed periodically as flips flops retain the data.

5.Faster access time compared to DRAM, therefore used as caches mostly.

6.Low density/less memory per chip due to more circuitry required for a single cell.

7. More power consumption than DRAM because of low chip density.

8.More costly in terms of cost per bit compared to DRAM due to low chip density.

DRAM

1.DRAM Stands For Dynamic Random Assessable Memory.

2.Memory cells are composed of capacitors and transistors.

3. Each cell requires a capacitor (which stores bit as charge) & a transistor.

4.Needs to be refreshed every few milliseconds to retain data because the charge of the capacitor leaks.

5.Slower access time compared to SRAM as  it cannot be read while being refreshed.

6.High chip density/more memory per chip compared to SRAM due to less circuitry for a single cell.

7. Less power consumption than SRAM because of simple circuitry.

8.Less costly than SRAM because of high chip density and therefore used as main memory in PCs.

Answer :- 1) A cost that does not vary depending on production or sales levels, such as rent, property tax, insurance, or interest expense.

 2) Fixed costs are those that do not change with the level of sales. If sales increase or decrease but nothing else changes then fixed costs remain the same. Common examples of fixed costs include rents, salaries of permanent employees and depreciation.

3) A high level of fixed costs increases operational gearing.

4) Rent is a fixed cost it is any cost that stays the same every month.

Answer:- Compare white box and black box testing

White Box Testing: 1)  It is related to  testing the application with coding/programming knowledge. Tester must have coding knowledge. Tester has to correct the code if any mistake is there.

2) White box testing requires large quantity of test cases.

3) It is also known as structural,open box, clear box or glass box testing.

4) Ex: Unit Testing Code Coverage Basis Path Testing etc.

Black box testing:1) It is a testing the application without coding /programming knowledge.Tester doesn't require coding knowledge He examines the application and external functional behavior and GUI features.

2) Black box testing uses simple test cases.

3) It is also known as behavioural or closed box testing.

4) EX: Functional Regression Testing Equivalence Partitioning Boundary Value Analysis etc.

Ans:-Block Diagram of i/o Module

Answer:- Instruction Cycle State Diagram