Coder's Challenge Group B (Round 1)
- 1.How can we connect to database in a web application?
- A.
Oracle sql developer
- B.
Toad
- C.
Mysql
- D.
JDBC template
- 2.What is the output of this program? #include <iostream> using namespace std; void fun(int x, int y) { x = 20; y = 10; } int main() { int x = 10; fun(x, x); cout << x; return 0; }
- A.
10
- B.
20
- C.
Compile Time Error
- D.
None
- 3.What is the output of the following program? public class Test implementsRunnable { public void run() { System.out.printf("%d",3); } public static void main(String[] args) throws Interrupted Exception { Thread thread = new Thread(new Test()); thread.start(); System.out.printf("%d",1); thread.join(); System.out.printf("%d",2); } }
- A.
123
- B.
213
- C.
132
- D.
321
- 4.. What is the output of the following program? public class Test { public static void main(String[] args) { int value = 3, sum = 6 + -- value int data = --value + ++value / sum++ * value++ + ++sum % value--; System.out.println(data); } }
- A.
1
- B.
2
- C.
0
- D.
3
- 5.What does the following code print? System.out.println("13" + 5 + 3);
- A.
21
- B.
1353
- C.
It will give a run-time error
- D.
138
- 6.State true or false for Java Program. i) Data members of an interface are by default final ii) An abstract class has implementations of all methods defined inside it.
- A.
I-false, ii-false
- B.
I-false, ii-true
- C.
I-true, ii-false
- D.
I-true, ii-true
- 7.Which mechanism is used when a thread is paused running in its critical section and another thread is allowed to enter (or lock) in the same critical section to be executed?
- A.
Inter-thread communication
- B.
Initial-thread communication
- C.
Mutual Exclusive
- D.
None of the above
- 8.What is the output of the following program? public class Test { public static void main(String[] args) { double data = 444.324; int value = data; System.out.println(data); } }
- A.
444.324
- B.
444
- C.
Compile time error
- D.
Run time error
- 9.What does the following line of code achieve? Intent intent = new Intent(FirstActivity.this, SecondActivity.class );
- A.
Creates an hidden Intent
- B.
Creates an implicit Intent
- C.
Create an explicit Intent
- D.
Starts an activity.
- 10.Class Base { public final void show() { System.out.println("Base::show() called"); } } class Derived extends Base { public void show() { System.out.println("Derived::show() called"); } } public class Main { public static void main(String[] args) { Base b = new Derived();; b.show(); } }
- A.
20
- B.
0
- C.
Compile time error
- D.
Garbage Value
- 11.What is the output of this program? #include <cstdlib> #include <iostream> using namespace std; int main() { int ran = rand(); cout << ran << endl; }
- A.
Any Number
- B.
89
- C.
0 to RAND_MAX
- D.
None
- 12.What is the meaning of the following declaration? int(*p[5])();
- A.
P is pointer to function
- B.
P is array of pointer to function
- C.
P is pointer to such function which return type is the array
- D.
P is pointer to array of function
- 13.What is the output of below code snippet? double a = 0.02; double b = 0.03; double c = b - a; System.out.println(c); BigDecimal _a = new BigDecimal("0.02"); BigDecimal _b = new BigDecimal("0.03"); BigDecimal _c = b.subtract(_a); System.out.println(_c);
- A.
0.009999999999999998 0.01
- B.
0.01 0.009999999999999998
- C.
0.01 0.01
- D.
0.009999999999999998 0.009999999999999998
- 14.Which of these is a super class of Character wrapper?
- A.
Long
- B.
Digits
- C.
Float
- D.
Number
- 15.What is the output of this program? class bitwise_operator { public static void main(String args[]) { int a = 3; int b = 6; int c = a | b; int d = a & b; System.out.println(c + " " + d); } }
- A.
7 2
- B.
7 7
- C.
7 5
- D.
5 2
- 16.What is the error in this code? byte b = 50; b = b * 50;
- A.
B cannot contain value 100, limited by its range
- B.
* operator has converted b * 50 into int, which can not be converted to byte without casting
- C.
B cannot contain value 50
- D.
No error in this code
- 17.What is the output of this program? class recursion { int func (int n) { int result; result = func (n - 1); return result; } } class Output { public static void main(String args[]) { recursion obj = new recursion() ; System.out.print(obj.func(12)); } }
- A.
0
- B.
1
- C.
Compile time error
- D.
Run Time Error
- 18.What is the output of this program? class recursion { int fact(int n) { int result; if (n == 1) return 1; result = fact(n - 1) * n; return result; } } class Output { public static void main(String args[]) { recursion obj = new recursion() ; System.out.print(obj.fact(6)); } }
- A.
1
- B.
30
- C.
120
- D.
720
- 19.What is the difference between servlets and applets? i. Servlets execute on Server; Applets execute on browser ii. Servlets have no GUI; Applet has GUI iii. Servlets creates static web pages; Applets creates dynamic web pages iv. Servlets can handle only a single request; Applet can handle multiple requests
- A.
I,ii,iii are correct
- B.
I,ii are correct
- C.
I,iii are correct
- D.
I,ii,iii,iv are correct
- 20.Which of the following code retrieves the body of the request as binary data?
- A.
DataInputStream data = new InputStream()
- B.
DataInputStream data = response.getInputStream()
- C.
DataInputStream data = request.getInputStream()
- D.
DataInputStream data = request.fetchInputStream()
- 21.Which of these interface abstractes the output of messages from httpd?
- A.
LogMessage
- B.
LogResponse
- C.
Httpdserver
- D.
HttpdResponse
- 22.What is the output of this program? class exception_handling { public static void main(String args[]) { try { int a[] = {1, 2,3 , 4, 5}; for (int i = 0; i < 7; ++i) System.out.print(a[i]); } catch(ArrayIndexOutOfBoundsException e) { System.out.print("0"); } } }
- A.
12345
- B.
123450
- C.
1234500
- D.
Compilation Error
- 23.What is the output of this program? public class Demo { public static void main(String[] args) { Map<Integer, Object> sampleMap = new TreeMap<Integer, Object>(); sampleMap.put(1, null); sampleMap.put(5, null); sampleMap.put(3, null); sampleMap.put(2, null); sampleMap.put(4, null); System.out.println(sampleMap); } }
- A.
{1=null, 2=null, 3=null, 4=null, 5=null}
- B.
{5=null}
- C.
Exception is thrown
- D.
{1=null, 5=null, 3=null, 2=null, 4=null}
- 24.What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj = new BitSet(5); for (int i = 0; i < 5; ++i) obj.set(i); obj.clear(2); System.out.print(obj.length() + " " + obj.size()); } }
- A.
4 64
- B.
5 64
- C.
5 128
- D.
4 128
- 25.#include<iostream> using namespace std; class Point { Point() { cout << "Constructor called"; } }; int main() { Point t1; return 0; }
- A.
Compiler Error
- B.
Runtime Error
- C.
Constructor called
- D.
None
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