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ECAT Computer Science Entry Test MCQs With Answers
Question # 1
The sum of the coefficient in the expansion of (a + x)
5
is
Choose an answer
32
16
8
5
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Question # 2
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Question # 3
The two different parts of the hyperbola are called its
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Vertices
Directrices
Nappes
Branches
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Question # 4
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Rule of quotient of fraction
Golden rule of fraction
Rule for product of fraction
Principle for equality of fraction
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Question # 5
If b
2
- 4ac is positive then the roots of the equation are
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Real
Imaginary
Positive
Negative
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Question # 6
In triangle ABC, in which b=95, c=34, a =52
𝜊
then the value of a=
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18 cm
18.027 cm
20.7 cm
19 cm
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Question # 7
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Question # 8
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Question # 9
w
15
= ______
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0
1
w
w
2
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Question # 10
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Question # 11
An equation of the form ax + by = k is homogeneous linear equation when:
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Question # 12
If 5,7 and 9 are A.Ms between a and b, then a and b is equal to
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2 and 12
1 and 10
3 and 11
-7 and 2
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Question # 13
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2x - 3x + c
x
2
- 3x + c
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Question # 14
(fog)′(x) =f′(g(x))g′(x) is derivative by
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Chain rule
Reciprocal rule
Power rule
Product rule
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Question # 15
Which of the following has the same value as i113
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i
-1
-i
1
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Question # 16
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tan 3x + c
cot 3x + c
- cot 3x + c
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Question # 17
Number of conics is
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1
3
2
4
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Question # 18
The measure of the angle subtended at the centre of the circle by an arc, whose length is equal to the radius of the circle is
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1
0
1'
1"
1 rad
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Question # 19
In following question, a number series is given with one term missing. choose the correct alternative that will same pattern and fill in the blank spaces.1 , 4, 9, 16, 25, x
Choose an answer
35
36
48
49
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Question # 20
The radius of the circle (x - 1)
2
+ (y + 3)
2
= 61 is
Choose an answer
8
4
64
None of these
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Question # 21
Which of the following ordered pair is a solution of the inequality x+2y<6?
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(2,3)
(2,2)
(6,0)
(1,1)
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Question # 22
Circle x
2
+ y
2
- 2y -y = 0 and x
2
+ y
2
- 8y -4 =0:
Choose an answer
Interesect
touch externally
touch internally
do not touch
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Question # 23
If the roots of ax2 + b =0 are real and distinct then
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ab > 0
a = 0
ab < 0
a > 0,b > 0
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Question # 24
Choose an answer
56
7
8
8/7
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Question # 25
f(x) = x3-x/x2+1 is :
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an even function
an odd function
an even and implicit function
neither even nor a odd
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Question # 26
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Question # 27
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0
1
2
4
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Question # 28
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-8
8
8i
32
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Question # 29
Choose an answer
none of these
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Question # 30
csc(-π/2) = __________;
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0
1
-1
Undefined
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Question # 31
Which of the following us a scalar
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displacement
velocity
acceleration
density
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Question # 32
Two sets A and B are said to be disjoint if
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Question # 33
The positive real number which is the measure of the length of a vector is called the
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Unit vector
Modulus
Inverse
None of these
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Question # 34
The solution set of the equation 1 + Cos x = 0 is __________
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none of these
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Question # 35
If A∩B=B, then n(A∩B) is equal to
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n(a)
n(a)+n(c)
n(c)
None of these
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Question # 36
Sum of all the four forth roots of unity is
Choose an answer
1
-1
i
0
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Question # 37
The set of first elements of the ordered pairs in a relation is called its
Choose an answer
domain
range
relation
function
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Question # 38
If distance of (a,b) from y-axis is 2 then
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a = 2
b = 2
a = b
a = 4
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Question # 39
The equation of the circle with centre (h, k) and radius r is
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(x+ h)
2
+ (y+ k)
2
= r
2
(x+ h)
2
+ (y - k)
2
= r
2
(x - h)
2
+ (y+ k)
2
= r
2
(x - h)
2
+ (y - k)
2
= r
2
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Question # 40
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Question # 41
The positive value of k for which the equation x2 + kx + 64 = 0 has one of the roots 0
Choose an answer
4
64
8
All values of k
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Question # 42
u,v,wand u x (v.w) are
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Equal
Parallel
Additive immense of each other
Meaningless
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Question # 43
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Question # 44
The law of tangents is ______
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Question # 45
The standard form of the quadratic function f(x) = -x
2
+4x+2, is
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(x-2)
2
+6
-(x-2)
2
+ 6
(x-3)
2
+5
(x+4)
2
-7
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Question # 46
If z = (x,y) , then z ̅ =
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(-x,y)
(x,-y)
(-x, -y)
None of these
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Question # 47
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Commutative property of addition
Closure property of addition
Additive inverse
Associative property w.r.t. to addition
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Question # 48
If f(x) = x
2
- x then f(-2) is
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4
6
2
0
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Question # 49
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Question # 50
A line joining two distinct points on a parabola is called
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Axis
Directrix
Chord
Tangent
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Question # 51
The set of months in a year beginning with S.
Choose an answer
{September, October, November}
Singleton set
Null set
Empty set
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Question # 52
If n is not natural number, then the expansion (1 + x)
n
is valid for
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Question # 53
If one root of 5x2 + 13x + k = 0 be the reciprocal of the other root the value of k is
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0
2
1
5
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Question # 54
There are 25 tickets bearing number from 1 to 25. One ticket is drawn at random. The probability that the number on it is a multiple of 5 or 6 is
Choose an answer
7 / 25
9 / 25
11 / 25
None of these
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Question # 55
For an arithmetic series to be convergent it is necessary that the series has
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Finite terms
d<0
Infinite terms
None of these
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Question # 56
In the expansion of (a + x)
n
the general term T
r + 1
is
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Question # 57
A sequence is a function whose domain is
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N
Subset of N
R
None of these
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Question # 58
(A∩Bc)c= -------------------------
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Ac∪Bc
Ac∪B
Ac∩B
None of these
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Question # 59
The equation of the line perpendicular to x- axis and passing through (-5,3) is
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y -3 =0
x+ 3 =0
y- 3 =∞
x +5 =0
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Question # 60
(1,0) is in the solution of the inequality
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3x + 2y > 8
2x - 3y < 4
2x + 3y > 3
x - 2y < -5
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Question # 61
The angle between lines xy =0 is
Choose an answer
45°
60°
90°
180°
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Question # 62
If a, b, c are in AP., a, b, c are in G.P. then A, m
2
b, c are in
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A.P.
G.P.
H.P.
None of these
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Question # 63
a ______quantity is one that possesses both magnitude and direction.
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Scalar
Vector
Segment
None of these
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Question # 64
General solution of tan 5
θ
= cot 2
θ
is
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Question # 65
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Question # 66
The three consecutive numbers a,√ab,b are in
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G.P
H.P
G.M
None of these
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Question # 67
i
3
=
Choose an answer
-1
i
-i
1
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Question # 68
If the line 2x -y +k =0 is a diameter of the circle x2 +y2 +6x -6y +5 =0 then k is equal to
Choose an answer
12
9
6
3
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Question # 69
The first three terms in the expansion of (1 + x)
-1
are
Choose an answer
1 + x + x
2
1 - x - x
2
-1 -x + x
2
1 - x + x
2
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Question # 70
Derivative of sin x w.r.t. sin x is
Choose an answer
0
1
sin x
cos x
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Question # 71
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Question # 72
Optimize means ______ a quantity under certain constraints
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Minimize
Maximize
Maximize or minimize
None of these
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Question # 73
If A is an event then which of the following is true
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P(A)<0
0≥P(A)≤1
P(A)>0
None
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Question # 74
cos(3π/2 +θ) = _____;
Choose an answer
sinθ
cosθ
-sinθ
-cosθ
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Question # 75
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n(A)
n(B)
0
1
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Question # 76
If 4 sin
2
θ
=1, then values of
θ
are
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Question # 77
The expansion of (1 + 2x)
-2
is valed if
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| x | < 1/2
| x | < 1
| x | < 2
| x | < 3
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Question # 78
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Zero matrix
Diagonal matrix
Column matrix
Scalar matrix
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Question # 79
7
2n
+ 3
n-1
. 2
3n-3
is divisible by
Choose an answer
24
25
9
13
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Question # 80
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2
1
5
0
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Question # 81
If (0, 0) and (-1, 0) are end points of a diameter, then the equation of the circle is
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Question # 82
For a square matrix A, if A = A
t
, then A is called
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matrix
Transpose
Symmetric
Non-symmetric
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Question # 83
To each element of a group there corresponds ______ inverse element
Choose an answer
Two
One
No
Three
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Question # 84
The solution set of the equation 4 cos
2
x - 3 + 0 is
Choose an answer
none of these
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Question # 85
Z is a group under
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Subtraction
Multiplication
Addition
None of these
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Question # 86
If f (x) = 2x+1 then fof (x) = _______;
Choose an answer
4x+3
2x +3
4x +1
None of these
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Question # 87
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Question # 88
Six boys and 3 girls are to be seated at random, in a row, for a photograph. The probability that no two girls will sit together is
Choose an answer
1/12
1/6
5/12
7/12
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Question # 89
The second degree equation 2x2 -xy+ 5x -2y +2 =0 represents
Choose an answer
Circle
Hyperbola
Ellipse
Pair of straight lines
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Question # 90
The points (5, 2, 4)(6, -1, 2) and (8, -7, k) are collinear if k is equal to
Choose an answer
-2
2
3
-1
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Question # 91
If A is any matrix then its additive inverse is
Choose an answer
A
A
-1
A
t
-A
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Question # 92
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Question # 93
A point (x,y) which satisfy a linear inequality in two variables form its
Choose an answer
Solution
Domain
Range
None
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Question # 94
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Natural numbers
Whole numbers
Integers
Rational numbers
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Question # 95
If (1+x-2x
3
)
6
= 1+a
1
x + a
2
x
2
+ a
3
x
3
+ ..... the the value of a
2
+ a
4
+ a
6
+ .....+a
12
will be
Choose an answer
32
31
64
1024
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Question # 96
(n + 2) (n + 1) n= ______
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Question # 97
{x : xε Z and x < 1} is
Choose an answer
Singleton set
A set with two points
Empty set
None of these
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Question # 98
The distance between the points (0,0) and (x,y) is
Choose an answer
x
2
+ y
2
x
y
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Question # 99
There is no integer n for which 3
n
is
Choose an answer
Odd
even
Natural
Prime
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Question # 100
If b
2
- 4ac = 0 then the roots of the equation are
Choose an answer
Real and distinct
Real and equal
Imaginary
None of these
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Question # 101
The points A(+1,-1),B(3,0),C(3,7),D(1,8) are vertices of
Choose an answer
Square
Parallelogram
Rectangle
Trapezium
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