ECAT Computer Science Entry Test With Answers

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ECAT Computer Science Entry Test

Sr. # Questions Answers Choice
1 {0} is a Empty set Singleton set Zero set Null Set
2 Every set is an improper subset of Empty set Equivalent set Itself Singleton set
3 Empty set is Not subset of every set Finite set Infinite set Not the member of real numbers
4 if A = (x/x€ Q˄ 0 < x < 1}, the A is Infinite set Finite set Set of rational numbers Set of real numbers
5 If there is one-one correspondence between A and B, then we write. A = B A⊆ B A⊇ B A ∼ B
6 P∉ A means <i>P</i>is subset of A <i>P</i>is an element of A <i>P does not belongs to A</i> A does not element of <i>P</i>
7 The set of months in a year beginning with S. {September, October, November} Singleton set Null set Empty set
8 A = B iff All elements of A also the elements of B A and B should be singleton A and B have the same number of elements If both have the same element
9 If P = {x/x = p/q where p,q∈ Z and q≠ 0}, then P is the set of Irrational numbers Even numbers Rational numbers Whole numbers
10 If S = {3,6,9,12.......}, then S = Four multiples of 3 S = Set of even numbers S = Set of prime numbers S = All multiples of 3
11 Which of the following is the definition of singleton The objects in a set A set having no element A set having no subset None of these
12 If T = {2,4,6,8,10,12}, then T = (First six natural numbers) T = (First six odd numbers) T = (First six real numbers) T = ( First six even numbers)
13 Which of the following statement is true? A set is a collection of non-empty object A set is a collection of only numbers a set is any collection of things a set is well-defined collection of objects
14 24 can be written as a product of Odd factors Even factors Whole factors Prime factors
15 14 is not a Prime number Whole number Even number Real number
16 Any whole number can be written as a product of factors which are Odd numbers Prime number Rational number Even number
17 If P is a whole number greater than 1, which has only P and I are factors. Then P is called Wholw number Prime number Even number Odd number
18 The set of positive integers, 0 and negative integers is known as the set of Natural numbers Rational numbers All integers Irrational numbers
19 √2 +√3 +√5) = (√2 +√3 +√5: this property is called associative property w.r.t addition commutative property Closure property w.r.t addition Additive identity
20 3.5+5.4=5.4+3.5 =8.9 this property of addition is called additive identity assoclative property commulative property closure property
21 2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called Associative property Identity property Commutative property Closure property w.r.t multiplication
22 If 0 = R, thenthe additive inverse of a is 1/9 <sup>1/-9</sup> a -a
23 The identity element with respect to subtraction is 0 -1 0 and 1 None of thes
24 If a and b are real numbers then a+b is also real number this law is called associative law of addition closure law of addition Distributive law of addition Commutative law of addition
25 The negative square root of 9 can be written as: -√9 √9 √18 -√18
26 The√ is used for the Positive square root Negative square root +ve and -ve square root Whole number
27 4/√49 is a Irrational Number Prime Number Rational number Whole number
28 The additive identity of real number is 1 2 1/2 <b>0</b>
29 I is not Real number Natural number Prime Number Whole Number
30 The multiplicative inverse ofx^(-1) is x a-2 0 1
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