Explore topic-wise MCQs in General Awareness.

This section includes 1698 Mcqs, each offering curated multiple-choice questions to sharpen your General Awareness knowledge and support exam preparation. Choose a topic below to get started.

301.

What is the output of this program? import java.util.*; class LOCALE_CLASS { public static void main(String args[]) { Locale obj = new Locale("PAKISTAN") ; System.out.print(obj.getCountry()); } }

A. Pakistan
B. PAKISTAN
C. Compilation Error
D. Nothing is displayed
Answer» E.
Discussion
302.

What is the output of this program? import java.util.*; class LOCALE_CLASS { public static void main(String args[]) { Locale obj = new Locale("URDU", "PAKISTAN") ; System.out.print(obj.getCountry()); } }

A. Pakistan
B. PAKISTAN
C. Compilation Error
D. Nothing is displayed
Answer» C. Compilation Error
Discussion
303.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); obj.remove(new String("A")); System.out.print(obj); } }

A. {C=8, B=2}
B. [C=8, B=2].
C. {A=3, C=8, B=2}
D. [A=3, C=8, B=2].
Answer» B. [C=8, B=2].
Discussion
304.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); System.out.print(obj.toString()); } }

A. {AB, BC, CD}
B. [AB, BC, CD].
C. [3, 2, 8].
D. {3, 2, 8}
Answer» C. [3, 2, 8].
Discussion
305.

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); System.out.print(obj.get(3)); } }

A. 2
B. 3
C. 4
D. 5
Answer» B. 3
Discussion
306.

What is the output of this program? import java.util.*; class date { public static void main(String args[]) { Date obj = new Date(); System.out.print(obj); } }

A. Prints Present Date
B. Runtime Error
C. Any Garbage Value
D. Prints Present Time & Date
Answer» E.
Discussion
307.

What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj1 = new BitSet(5); BitSet obj2 = new BitSet(10); for (int i = 0; i < 5; ++i) obj1.set(i); for (int i = 3; i < 13; ++i) obj2.set(i); obj1.and(obj2); System.out.print(obj1); } }

A. {0, 1}
B. {2, 4}
C. {3, 4}
D. {3, 4, 5}
Answer» D. {3, 4, 5}
Discussion
308.

What is the output of this program? import java.util.*; class Collection_Algos { public static void main(String args[]) { LinkedList list = new LinkedList(); list.add(new Integer(2)); list.add(new Integer(8)); list.add(new Integer(5)); list.add(new Integer(1)); Iterator i = list.iterator(); while(i.hasNext()) System.out.print(i.next() + " "); } }

A. 2 8 5 1
B. 1 5 8 2
C. 2
D. 2 1 8 5
Answer» C. 2
Discussion
309.

Which of these will create and start this thread? public class MyRunnable implements Runnable { public void run() { // some code here } }

A. New Runnable(MyRunnable).start();
B. New Thread(MyRunnable).run();
C. New Thread(new MyRunnable()).start();
D. New MyRunnable().start();
Answer» D. New MyRunnable().start();
Discussion
310.

What is the output of this program? class bitwise_operator { public static void main(String args[]) { int var1 = 42; int var2 = ~var1; System.out.print(var1 + " " + var2); } }

A. 42 42
B. 43 43
C. 42 -43
D. 42 43
Answer» D. 42 43
Discussion
311.

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
Answer» B. 7 7
Discussion
312.

Which of the following operators can operate on a boolean variable? 1. && 2. == 3. ?: 4. +=

A. 3 & 2
B. 1 & 4
C. 1, 2 & 4
D. 1, 2 & 3
Answer» E.
Discussion
313.

What will be the output of the program? int x = 3; int y = 1; if (x = y) /* Line 3 */ { System.out.println("x =" + x); }

A. X = 1
B. X = 3
C. Compilation fails.
D. The code runs with no output.
Answer» D. The code runs with no output.
Discussion
314.

What will be the output of the program? Float f = new Float("12"); switch (f) { case 12: System.out.println("Twelve"); case 0: System.out.println("Zero"); default: System.out.println("Default"); }

A. Zero
B. Twelve
C. Default
D. Compilation fails
Answer» E.
Discussion
315.

What will be the output of the program? int i = 0; while(1) { if(i == 4) { break; } ++i; } System.out.println("i = " + i);

A. I = 0
B. I = 3
C. I = 4
D. Compilation fails.
Answer» E.
Discussion
316.

What will be the output of the program? public class Delta { static boolean foo(char c) { System.out.print(c); return true; } public static void main( String[] argv ) { int i = 0; for (foo('A'); foo('B') && (i < 2); foo('C')) { i++; foo('D'); } } }

A. ABDCBDCB
B. ABCDABCD
C. Compilation fails.
D. An exception is thrown at runtime.
Answer» B. ABCDABCD
Discussion
317.

Which two statements are equivalent? 1. 16*4 2. 16>>2 3. 16/2^2 4. 16>>>2

A. 1 and 2
B. 2 and 4
C. 3 and 4
D. 1 and 3
Answer» C. 3 and 4
Discussion
318.

Which two statements are equivalent? 1. 3/2 2. 3<2 3. 3*4 4. 3<<2

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4
Answer» D. 1 and 4
Discussion
319.

Which three statements are true? 1. f1 == f2 2. f1 == f3 3. f2 == f1[1] 4. x == f1[0] f5. == f1[0] import java.awt.Button; class CompareReference { public static void main(String [] args) { float f = 42.0f; float [] f1 = new float[2]; float [] f2 = new float[2]; float [] f3 = f1; long x = 42; f1[0] = 42.0f; } }

A. 1, 2 and 3
B. 2, 4 and 5
C. 3, 4 and 5
D. 1, 4 and 5
Answer» C. 3, 4 and 5
Discussion
320.

Which two are equal? 1. 32/4 2. (8 >> 2) << 4 3. 2^5 4. 128 >>> 2 5. 2 >> 5

A. 1 and 2
B. 2 and 4
C. 1 and 3
D. 2 and 3
Answer» C. 1 and 3
Discussion
321.

Determine the output of following code. public void foo( boolean a, boolean b) { if( a ) { System.out.println("A"); /* Line 5 */ } else if(a && b) /* Line 7 */ { System.out.println( "A && B"); } else /* Line 11 */ { if ( !b ) { System.out.println( "notB") ; } else { System.out.println( "ELSE" ) ; } } }

A. If a is true and b is true then the output is "A && B"
B. If a is true and b is false then the output is "notB"
C. If a is false and b is true then the output is "ELSE"
D. If a is false and b is false then the output is "ELSE"
Answer» D. If a is false and b is false then the output is "ELSE"
Discussion
322.

Which two are acceptable types for x? 1. byte 2. long 3. char 4. float 5. Short 6. Long switch(x) { default: System.out.println("Hello"); }

A. 1 and 3
B. 2 and 4
C. 3 and 5
D. 4 and 6
Answer» B. 2 and 4
Discussion
323.

Which statement is true? public void test(int x) { int odd = 1; if(odd) /* Line 4 */ { System.out.println("odd"); } else { System.out.println("even"); } }

A. Compilation fails.
B. "odd" will always be output.
C. "even" will always be output.
D. "odd" will be output for odd values of x, and "even" for even values.
Answer» B. "odd" will always be output.
Discussion
324.

Which statement is true? public class While { public void loop() { int x= 0; while ( 1 ) /* Line 6 */ { System.out.print("x plus one is " + (x + 1)); /* Line 8 */ } } }

A. There is a syntax error on line 1.
B. There are syntax errors on lines 1 and 6.
C. There are syntax errors on lines 1, 6, and 8.
D. There is a syntax error on line 6.
Answer» E.
Discussion
325.

What will be the output of the program? int I = 0; label: if (I < 2) { System.out.print("I is " + I); I++; continue label; }

A. I is 0
B. I is 0 I is 1
C. Compilation fails.
D. None of the above
Answer» D. None of the above
Discussion
326.

What will be the output of the program? int i = l, j = -1; switch (i) { case 0, 1: j = 1; /* Line 4 */ case 2: j = 2; default: j = 0; } System.out.println("j = " + j);

A. J = -1
B. J = 0
C. J = 1
D. Compilation fails.
Answer» E.
Discussion
327.

What will be the output of the program? int i = 1, j = 10; do { if(i > j) { break; } j--; } while (++i < 5); System.out.println("i = " + i + " and j = " + j);

A. I = 6 and j = 5
B. I = 5 and j = 5
C. I = 6 and j = 4
D. I = 5 and j = 6
Answer» E.
Discussion
328.

What will be the output of the program? public class Switch2 { final static short x = 2; public static int y = 0; public static void main(String [] args) { for (int z=0; z < 3; z++) { switch (z) { case x: System.out.print("0 "); case x-1: System.out.print("1 "); case x-2: System.out.print("2 "); } } } }

A. 0 1 2
B. 0 1 2 1 2 2
C. 2 1 0 1 0 0
D. 2 1 2 0 1 2
Answer» E.
Discussion
329.

What will be the output of the program? public class SwitchTest { public static void main(String[] args) { System.out.println("value =" + switchIt(4)); } public static int switchIt(int x) { int j = 1; switch (x) { case l: j++; case 2: j++; case 3: j++; case 4: j++; case 5: j++; default: j++; } return j + x; } }

A. Value = 2
B. Value = 4
C. Value = 6
D. Value = 8
Answer» E.
Discussion
330.

What will be the output of the program? public class If2 { static boolean b1, b2; public static void main(String [] args) { int x = 0; if ( !b1 ) /* Line 7 */ { if ( !b2 ) /* Line 9 */ { b1 = true; x++; if ( 5 > 6 ) { x++; } if ( !b1 ) x = x + 10; else if ( b2 = true ) /* Line 19 */ x = x + 100; else if ( b1 | b2 ) /* Line 21 */ x = x + 1000; } } System.out.println(x); } }

A. 0
B. 1
C. 101
D. 111
Answer» D. 111
Discussion
331.

What will be the output of the program? for (int i = 0; i < 4; i += 2) { System.out.print(i + " "); } System.out.println(i); /* Line 5 */

A. 0 2 4
B. 0 2 4 5
C. 0 1 2 3 4
D. Compilation fails.
Answer» E.
Discussion
332.

What will be the output of the program? public class Switch2 { final static short x = 2; public static int y = 0; public static void main(String [] args) { for (int z=0; z < 3; z++) { switch (z) { case y: System.out.print("0 "); /* Line 11 */ case x-1: System.out.print("1 "); /* Line 12 */ case x: System.out.print("2 "); /* Line 13 */ } } } }

A. 0 1 2
B. 0 1 2 1 2 2
C. Compilation fails at line 11.
D. Compilation fails at line 12.
Answer» D. Compilation fails at line 12.
Discussion
333.

What will be the output of the program? public class If1 { static boolean b; public static void main(String [] args) { short hand = 42; if ( hand < 50 && !b ) /* Line 7 */ hand++; if ( hand > 50 ); /* Line 9 */ else if ( hand > 40 ) { hand += 7; hand++; } else --hand; System.out.println(hand); } }

A. 41
B. 42
C. 50
D. 51
Answer» E.
Discussion
334.

What will be the output of the program? public class Test { public static void main(String [] args) { int I = 1; do while ( I < 1 ) System.out.print("I is " + I); while ( I > 1 ) ; } }

A. I is 1
B. I is 1 I is 1
C. No output is produced.
D. Compilation error
Answer» D. Compilation error
Discussion
335.

What will be the output of the program? int x = l, y = 6; while (y--) { x++; } System.out.println("x = " + x +" y = " + y);

A. X = 6 y = 0
B. X = 7 y = 0
C. X = 6 y = -1
D. Compilation fails.
Answer» E.
Discussion
336.

What will be the output of the program? int I = 0; outer: while (true) { I++; inner: for (int j = 0; j < 10; j++) { I += j; if (j == 3) continue inner; break outer; } continue outer; } System.out.println(I);

A. 1
B. 2
C. 3
D. 4
Answer» B. 2
Discussion
337.

What will be the output of the program? for(int i = 0; i < 3; i++) { switch(i) { case 0: break; case 1: System.out.print("one "); case 2: System.out.print("two "); case 3: System.out.print("three "); } } System.out.println("done");

A. Done
B. One two done
C. One two three done
D. One two three two three done
Answer» E.
Discussion
338.

What will be the output of the program? public class Test { public static void main(String args[]) { int i = 1, j = 0; switch(i) { case 2: j += 6; case 4: j += 1; default: j += 2; case 0: j += 4; } System.out.println("j = " + j); } }

A. J = 0
B. J = 2
C. J = 4
D. J = 6
Answer» E.
Discussion
339.

What will be the output of the program? boolean bool = true; if(bool = false) /* Line 2 */ { System.out.println("a"); } else if(bool) /* Line 6 */ { System.out.println("b"); } else if(!bool) /* Line 10 */ { System.out.println("c"); /* Line 12 */ } else { System.out.println("d"); }

A. a
B. b
C. c
D. d
Answer» D. d
Discussion
340.

What will be the output of the program? public class Switch2 { final static short x = 2; public static int y = 0; public static void main(String [] args) { for (int z=0; z < 4; z++) { switch (z) { case x: System.out.print("0 "); default: System.out.print("def "); case x-1: System.out.print("1 "); break; case x-2: System.out.print("2 "); } } } }

A. 0 def 1
B. 2 1 0 def 1
C. 2 1 0 def def
D. 2 1 0 def 1 def 1
Answer» E.
Discussion
341.

What will be the output of the program? int i = 0, j = 5; tp: for (;;) { i++; for (;;) { if(i > --j) { break tp; } } System.out.println("i =" + i + ", j = " + j);

A. I = 1, j = 0
B. I = 1, j = 4
C. I = 3, j = 4
D. Compilation fails.
Answer» E.
Discussion
342.

What is the output of this program? class Output { public static void main(String args[]) { int a = 1; int b = 2; int c; int d; c = ++b; d = a++; c++; b++; ++a; System.out.println(a + " " + b + " " + c); } }

A. 3 2 4
B. 3 2 3
C. 2 3 4
D. 3 4 4
Answer» E.
Discussion
343.

What is the output of this program? class leftshift_operator { public static void main(String args[]) { byte x = 64; int i; byte y; i = x << 2; y = (byte) (x << 2) System.out.print(i + " " + y); } }

A. 0 64
B. 64 0
C. 0 256
D. 256 0
Answer» E.
Discussion
344.

What is the output of this program? class rightshift_operator { public static void main(String args[]) { int x; x = 10; x = x >> 1; System.out.println(x); } }

A. 10
B. 5
C. 2
D. 20
Answer» C. 2
Discussion
345.

What is the output of this program? class Output { public static void main(String args[]) { int a = 1; int b = 2; int c = 3; a |= 4; b >>= 1; c <<= 1; a ^= c; System.out.println(a + " " + b + " " + c); } }

A. 3 1 6
B. 2 2 3
C. 2 3 4
D. 3 3 6
Answer» B. 2 2 3
Discussion
346.

What is the output of this program? class ternary_operator { public static void main(String args[]) { int x = 3; int y = ~ x; int z; z = x > y ? x : y; System.out.print(z); } }

A. 0
B. 1
C. 3
D. -4
Answer» D. -4
Discussion
347.

What is the output of this program? class Output { public static void main(String args[]) { int x , y = 1; x = 10; if (x != 10 && x / 0 == 0) System.out.println(y); else System.out.println(++y); } }

A. 1
B. 2
C. Runtime error owing to division by zero in if condition
D. Unpredictable behavior of program
Answer» C. Runtime error owing to division by zero in if condition
Discussion
348.

What is the output of this program? class Output { public static void main(String args[]) { boolean a = true; boolean b = false; boolean c = a ^ b; System.out.println(!c); } }

A. 0
B. 1
C. False
D. True
Answer» D. True
Discussion
349.

What is the output of this program? class Output { public static void main(String args[]) { int x=y=z=20; } }

A. Compile and runs fine
B. 20
C. Run time error
D. Compile time error
Answer» E.
Discussion
350.

What is the output of this program? class Output { public static void main(String args[]) { int a,b,c,d; a=b=c=d=20 a+=b-=c*=d/=20 System.out.println(a+" "+b+" "+c+" "+d); } }

A. Compile time error
B. Runtime error
C. A=20 b=0 c=20 d=1
D. None of the mentioned
Answer» D. None of the mentioned
Discussion