ব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্স

Half adder is the name of the logic circuit which can add two binary digits.
An adder is a digital circuit that performs addition of numbers. The half adder adds two binary digits called as augend and addend and produces two outputs as sum and carry; XOR is applied to both inputs to produce sum and AND gate is applied to both inputs to produce carry.

EDSAC : Electronic Delay Storage Automatic Calculator (EDSAC) was an early British computer.
ENIAC : Electronic Numerical Integrator And calculator which was the first large-scale computer. which is 300 times faster than human speed.
Abacus : The abacus, also called a counting frame, is a calculating tool.
UNIVAC : ('UNIVersal Automatic Computer I) was the first commercial computer made in the United States.

The physical components of a computer system is Hardware
Computer hardware is the collection of physical parts of a computer system. This includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others.
Computer hardware includes the physical parts or components of a computer, such as the central processing unit, monitor, keyboard, computer data storage, graphic card, sound card, speakers and motherboard.
There are five main hardware components in a computer system: Input, Processing, Storage, Output and Communication devices. Are devices used for entering data or instructions to the central processing unit.

COBOL - common business oriented language Acronym for common business oriented language.
Developed in the late 1950s and early 1960s, COBOL is the second-oldest high-level programming language (FORTRAN is the oldest). It is particularly popular for business applications that run on large computers.

The Soroban, or Japanese abacus. It consists of a wooden frame, which holds columns of beads.
For hundreds of years, this tool was used by bankers and merchants as the original calculator.

RAM is used as a short memory because it is Volatile.
Most RAM (random access memory) used for primary storage in personal computers is volatile memory. RAM is much faster to read from and write to than the other kinds of storage in a computer, such as the hard disk or removable media.
RAM is called 'volatile' memory by analogy because if the computer loses power, all the data stored in RAM (or other volatile memory) is lost or 'evaporates'. Non-volatile memory is memory that keeps its data while the system isn't running.

Keyboard is not an output device of a computer.
The computer is a very versatile machine. It can easily process different types of data. To work with these data, we require different types of devices. These devices can help us enter data into the computer. These devices are called input and output devices. They mainly cover devices like mouse, keyboard, printer, speaker, joystick, etc which can be used with a computer.

Let the length of rectangle = 5x and breadth of triangle = 3x
According to the question,
5x-3x=8
=> 2x=8
=> x=4
Length = 5x =5×4 = 20 m
Breadth=3x = 3×4 =12 m
Required area = Length×Breadth
= 20×12
=240 sq m

Area of the rectangular field
= 12375/15
=825 sq m.
According to the question,
L×B = 825 [L = length and B = breadth]
=> L×25 = 825
L = 825/ 25=33 m

Required area =a² = (20)² [a = side]
= 400 sq cm

Let First angle = 3x
Second angle = 4x
Third angle = 5x
and fourth angle = 8x
We know 3x + 4x+ 5x + 8x = 360 degree
=> 20x = 360 degree
=> x = 18 degree
Measure of smallest angle
= 3x =3×18 degree=54 degree

Given that.
Diameter of a right circular cone = 7 cm
Radius of a right circular cone = 7/2 cm
and slant height of a right circular cone (l) = 10 cm
Therefore, Lateral surface area of a cone = πrl
= 22/7 × 7/2 × 10
= 11×10
= 110 cm²

Given,
l_{1 /} l₂ = 5/7
Now, curved surface area of first cone
= πrl₁
and curved surface area of second cone
= πrl₂
Therefore, Ratio
= πrl_{1 /} πrl₂
= l_{1 /} l₂
=5:7

tanθ = AB/BC
BC=√ 3AB
=>AB/BC=1/ √3
tanθ = 1/√3
=>θ=30^∘

Height 6ft : Shadow 4ft
3 : 2
So height of pole will be in same ratio
50×3/2 = 75ft

AC = Ladder
BC = 6.5 metres
In△ABC
Cose60^∘ = BC/AC
AC = 13m

a detailed plan for a journey, especially a list of places to visit; plan of travel.
a line of travel; route.
an account of a journey; record of travel.
a book describing a route or routes of travel with information helpful to travelers; guidebook for travelers.

8648−7652=?×40
996 =?×40 =>? =996/40 =24.9

a$b=a+b+a/b
Therefore, 12$4=12+4+12/4
= 12 + 4 + 3 = 19

We know that,
(x+y)³=x³+y³+3xy(x+y)
1=x³+y³+3xy [given, x + y = 1]
=> x³+y³+3xy=1

x + y = 18
Because, x²+y²=(x+y)²−2xy
=(18)²−2×72
=324−144
=180

4/7=0.57,
5/13=0.38,
6/11=0.54,
3/5=0.6,
2/3=0.67
So the second smallest fraction is 6/11

726.34 + 888.12 - ? = 1001.88
Therefore, ? = 726.34 + 888.12 - 1001.88
= 1614.46 -1001.88 = 612.58

sinθ+cosθ=1
On squaring both sides, we get
(sinθ+cosθ)²=1
sin²θ+cos²θ+ 2sinθcosθ=1
1+2sinθcosθ=1
2sinθcosθ=0
sinθcosθ=0

Minimum value of cosθ=−1
and minimum value of secθ=−1
cos²θ+sec²θ
=(−1)2+(−1)2
=2

Ethylene is used for Artificial Ripening of Green Fruit.
Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in its effects to the natural ripening agent, ethylene

Albert Einstein proposed the mass-energy equivalence relation from his famous special theory of relativity.
Einstein's relation is E=mc²