A bag contains 3 white, 5 blue and 4 green balls. If two balls are drawn at random from the bag, then find the probability that both the balls are of same colour?
A :
19/66
B :
18/66
C :
12/66
D :
17/66
Answer: A
Q. No. :
2
Question :
The odds in favour of a player being selected for the national team with three independent selectors are 4:3, 2:1 and 1:4 respectively. What is the probability that of the three selectors a majority will be favourable?
A :
2/5
B :
10/21
C :
6/35
D :
2/21
Answer: B
Q. No. :
3
Question :
Vijay plays a game, wherein he tosses a coin and scores 9 points if heads turns up and 5 points if tails turns up. A total of exactly 182 points is required to win the game. In how many combinations of heads and tails can Vijay win?
A :
6
B :
5
C :
4
D :
3
Answer: C
Q. No. :
4
Question :
There are 30 mango trees, 40 guava trees and 50 apple trees. The trees are planted in such a way that each row of trees contains trees of the same variety and every row contains an equal number of trees. Find the minimum number of rows in which all the trees could be planted.
A :
9
B :
10
C :
11
D :
12
Answer: D
Q. No. :
5
Question :
In a right angled triangle, the larger of the sides containing the right angle is 8cm longer than the smaller of the sides. The sum of the lengths of the sides containing the right angle is 16cm more than the length of the other side. Find the length (in cm) of the smallest side.
A :
18
B :
12
C :
24
D :
16
Answer: C
Q. No. :
6
Question :
If Ashok travelled at 4/5 th of his usual speed, he would reach his destination 15 minutes late. By how much minutes would he be early if he travelled at 6/5 th of his usual speed?
A :
12
B :
10
C :
15
D :
16
Answer: B
Q. No. :
7
Question :
The sum of present ages of a mother and her daughter is 60 years. When the mother attains her husband's present age, the ratio of her husband's age and her daughter's age would be 2:1. Find the present age of the daughter.
A :
15
B :
20
C :
10
D :
18
Answer: B
Q. No. :
8
Question :
Suppose that you would like to create an instance of a new Map that has an iteration order that is the same as the iteration order of an existing instance of a Map. Which concrete implementation of the Map interface should be used for the new instance?
A :
TreeMap
B :
HashMap
C :
LinkedHashmap
D :
The answer depends on the implementation of the existing instance.
The iteration order of a Collection is the order in which an iterator moves through the elements of the Collection. The iteration order of a LinkedHashMap is determined by the order in which elements are inserted.
When a new LinkedHashMap is created by passing a reference to an existing Collection to the constructor of a LinkedHashMap the Collection.addAll method will ultimately be invoked.
The addAll method uses an iterator to the existing Collection to
iterate through the elements of the existing Collection and add each to
the instance of the new LinkedHashMap.
Since the iteration order of the LinkedHashMap is determined by the order of insertion, the iteration order of the new LinkedHashMap must be the same as the interation order of the old Collection.
Q. No. :
9
Question :
publicclassMyRunnableimplementsRunnable
{publicvoid run()
{
// some code here
}
}
Because the class implements Runnable, an instance of it has to be passed to the Thread constructor, and then the instance of the Thread has to be started.
A is incorrect. There is no constructor like this for Runnable because Runnable is an interface, and it is illegal to pass a class or interface name to any constructor.
B is incorrect for the same reason; you can't pass a class or interface name to any constructor.
D is incorrect because MyRunnable doesn't have a start() method, and the only start() method that can start a thread of execution is the start() in the Thread class.
Q. No. :
10
Question :
Which two can be used to create a new Thread?
1.Extend java.lang.Thread and override the run() method. 2.Extend java.lang.Runnable and override the start() method. 3.Implement java.lang.Thread and implement the run() method. 4.Implement java.lang.Runnable and implement the run() method. 5.Implement java.lang.Thread and implement the start() method.
There are two ways of creating a thread; extend (sub-class) the Thread class and implement the Runnable interface. For both of these ways you must implement (override and not overload) the public void run() method.
(1) is correct - Extending the Thread class and overriding its run method is a valid procedure.
(4) is correct - You must implement interfaces, and runnable is an interface and you must also include the run method.
(2) is wrong - Runnable is an interface which implements not Extends. Gives the error: (No interface expected here)
(3) is wrong - You cannot implement java.lang.Thread (This is a Class). (Implements Thread, gives the error: Interface expected). Implements expects an interface.
(5) is wrong - You cannot implement java.lang.Thread (This is a class). You Extend classes, and Implement interfaces. (Implements Thread, gives the error: Interface expected)
Q. No. :
11
Question :
What is the name of the method used to start a thread execution?
Option B is Correct. The start() method causes this thread to begin execution; the Java Virtual Machine calls the run method of this thread.
Option A is wrong. There is no init() method in the Thread class.
Option C is wrong. The run() method of a
thread is like the main() method to an application. Starting the thread
causes the object's run method to be called in that separately executing
thread.
Option D is wrong. The resume() method is deprecated. It resumes a suspended thread.
Q. No. :
12
Question :
What is the value of "d" after this line of code has been executed?
The Math.random() method returns a number greater than or equal to 0 and less than 1 . Since we can then be sure that the sum of that number and 2.5 will be greater than or equal to 2.5 and less than 3.5, we can be sure that Math.round() will round that number to 3. So Option B is the answer.
Q. No. :
13
Question :
What is the difference between the functions memcpy and memmove?
A :
memcpy is declared in <string.h> and memmove is declared in <stdlib.h>.
B :
memcpy copies the string whereas memmove copies as well as move the strings.
C :
memcpy is for non-overlapping memory areas whereas memmove can be used for overlapping memory areas.
D :
memcpy is portable whereas memmove is non-portable.
Answer: C
Q. No. :
14
Question :
Which of the following sentence is the correct description for the following declaration?
void(*x[10]) ();
A :
x is an array[10] of pointer to function returning type void.
B :
x is an array[10] of pointer to function returning type void*.
C :
x is an array of ten function returning type void.
D :
x is a pointer to an array of ten pointer to function returning type void.
Answer: A
Q. No. :
15
Question :
What will be
output if you will execute following c code?
Which of the following is not a memory area in an executable C program?
A :
Stack area
B :
Queue area
C :
Heap area
D :
Code area
Answer: B
Q. No. :
17
Question :
What is the output of the following program?
int main() { int i=5, j=2; printf("%d %d", i << j, i >> j); }
A :
16,1
B :
20,1
C :
1,16
D :
1,20
Answer: B
Q. No. :
18
Question :
Find out the error in following block of code.
If (x = 100)
Cout << “x is 100”;
A :
100 should be enclosed in quotations
B :
There is no semicolon at the end of first line
C :
Equals to operator mistake
D :
Variable x should not be inside quotation
Answer: C
Q. No. :
19
Question :
Examine the following program and determine the output
#include <iostream>
using namespace std;
int operate (int a, int b)
{
return (a * b);
}
float operate (float a, float b)
{
return (a/b);
}
int main()
{
int x=5, y=2;
float n=5.0, m=2.0;
cout << operate(x,y) <<"\t";
cout << operate (n,m);
return 0;
}
A :
10.0, 5.0
B :
5.0, 2.5
C :
10.0, 5
D :
10, 2.5
Answer: D
Q. No. :
20
Question :
Identify the correct statement regarding scope of variables
A :
Global variables are declared in a separate file and accessible from any program.
B :
Local variables are declared inside a function and accessible within the function only.
C :
Global variables are declared inside a function and accessible from anywhere in program.
D :
Local variables are declared in the main body of the program and accessible only from functions.
Answer: B
Q. No. :
21
Question :
Observe the following block of code and determine what happens when x=2?
switch (x){
case 1:
case 2:
case 3:
cout<< "x is 3, so jumping to third branch";
goto thirdBranch;
default:
cout<<"x is not within the range, so need to say Thank You!";
}
A :
Program jumps to the end of switch statement since there is nothing to do for x=2
B :
The code inside default will run since there is no task for x=2, so, default task is run
C :
Will display x is 3, so jumping to third branch and jumps to third Branch.
D :
None of above
Answer: C
Q. No. :
22
Question :
Suppose that the internal bit string representation of a key is 010111001010110 and 5 bits are allowed in the index. What will be the hash value by using folding method?
A :
01111
B :
11110
C :
01011
D :
10101
Answer: A
Q. No. :
23
Question :
Which of the following statements are correct? (i). A stack may be viewed as descending priority queue. (ii).A queue may be viewed as descending priority queue. (iii).A queue may be viewed as ascending priority queue. (iv).A stack may be viewed as ascending priority queue.
A :
(i), (ii)
B :
(i),(iii)
C :
(ii),(iv)
D :
(iii),(iv)
Answer: B
Q. No. :
24
Question :
Suppose T is binary search tree. which of the following statements about T is TRUE?
A :
Preorder traversal of T will yield a sorted listing of the elements of T.
B :
Inorder traversal of T will yield a sorted listing of the elements of T.
C :
Postorder traversal of T will yield a sorted listing of the elements of T.
D :
Inorder traversal as well as Postorder traversal of T will yield a sorted listing the elements of T.
If time required to execute if loop is O(2) and the else part is O(2) then what will be the total execution time?
A :
O(2)
B :
O(4)
C :
O(3)
D :
None of these
Answer: A
Q. No. :
26
Question :
Which of the following permutations can be obtained in the output (in the same order) using a stack assuming that the input is a sequence 1,2,3,4,5in that order?
A :
3,4,5,1,2
B :
3,4,5,2,1
C :
1,5,2,3,4
D :
5,4,3,1,2
Answer: B
Q. No. :
27
Question :
In __________ strategy a transaction is not allowed to modify the physical database until the undo portion of the log is written to stable storage.
A :
centralized log
B :
write-back-log
C :
write-ahead-log
D :
None of these
Answer: C
Q. No. :
28
Question :
Consider the following functional dependencies in a database D -->A, A--> E, N-->R, R-->N, C-->Cn, C-->I (R,C)-->G The relation (R,N,D,A) is
A :
in 2NF but not in 3NF
B :
in 3NF but not in BCNF
C :
in BCNF
D :
None of these
Answer: A
Q. No. :
29
Question :
State which of the following is True or False? (i). The value of NULL is ignored in any aggregation. (ii). NULL is treated as an ordinary value in a grouped attribute.
A :
True, True
B :
True, False
C :
False, True
D :
False, False
Answer: A
Q. No. :
30
Question :
We have the following relation schemas : Patient(patient_name,patient_addr,Treating_doctor); Hospitalcharges(patient_name,hospitalchargeid,typeofcharge,amount); Doctorcharges(patient_name,doctorchargeid,typeofchargeid,amount) Suppose we have query as, (SELECT patient_name FROM doctorcharges) EXCEPTALL (SELECT patient_name FROM hospitalcharges) If Jones has 3 doctorcharge bill and 1 hospitalcharge bill, how many tuples with the name Jones in the result?
A :
4 tuples
B :
3 tuples
C :
2 tuples
D :
1 tuples
Answer: C
Q. No. :
31
Question :
Which of the following cannot be a triggering event for a trigger?